How do you use a user control as a template inside a repeater?

fernandezr

I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

Jul 6 '06 #1

Subscribe Post Reply

2994

David Lozzi

First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa" src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server" OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl" /></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs)

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message news:11**********************@s26g2000cwa.googlegr oups.com...

>I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

Jul 6 '06 #2

fernandezr

David,

Thank you! That helped quite a bit. I can now get the user control to
be called multiple times and the template html is displayed. Now I'm
getting an error when I try to reference a method inside of the user
control.

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

Source Error:

Line 25: objLabel = (Label)this.FindControl(controlName);
Line 26: if (blnVisible)
Line 27: objLabel.Text = lblTitle;
Line 28: else
Line 29: objLabel.Visible = false;
Source File: d:\acstest\webroot\MOR\controls\ucRosterProfile.as cx.cs
Line: 27

Below is the code I'm using to call the labelSet method:

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucRo ster");
usc.labelSet("test", true, "test1");
}
}

Do you know what I'm missing to get this to work?

Thanks,
Happy Thursday,
Robert
David Lozzi wrote:

First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa" src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server" OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl" /></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs)

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message news:11**********************@s26g2000cwa.googlegr oups.com...
I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert
------=_NextPart_000_007B_01C6A12A.759D9DC0
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Google-AttachSize: 11079

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.5346.5" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>First add the user control
to the page declaration</DIV>
<DIV> </DIV>
<DIV><<A
href='mailto:%@Register Tagname="usercontrol" Tagprefix="usa" src="~/controls/usercontrol.ascx"%'>%@Register Tagname="usercontrol"
Tagprefix="usa" src="~/controls/usercontrol.ascx"%</A>></DIV>
<DIV> </DIV>
<DIV>then put the user control in
the repeater</DIV>
<DIV> </DIV>
<DIV><asp:Repeater id=Repeater1 OnItemDataBound="processList"
runat="server"><ITEMTEMPLATE><?xml:namespace prefix = usa /><usa:usercontrol
id=uscControl runat="Server">   <asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">    <ItemTemplate& gt;<usa:usercontrol
runat="Server" id="uscControl"
/></ItemTemplate>    </asp:Repeater></usa:usercontrol></ITEMTEMPLATE></asp:Repeater></DIV>
<DIV> </DIV>
<DIV>then in the
codebehind</DIV>
<DIV> </DIV>
<DIV>
PrivateSubByValAsObject, ByValAs
System.Web.UI.WebControls.RepeaterItemEventArgs)
   
IfOrThen
   
    DimAs
   
    'now you can access all of the public properties and methods
of the usercontrol, for example
      
usc.LabelSet("test",true,"test1")
        'and so on
   
EndIf
EndSub</DIV>
<DIV> -- David Lozzi <A
href="mailto:dlozzi@(remove)delphi-ts.com">dlozzi@(remove)delphi-ts.com</A> <A
href="http://www.delphi-ts.com">www.delphi-ts.com</A></DIV>
<DIV> </DIV>
<DIV>"fernandezr" <<A
href="mailto:ro**************@gmail.com">ro**************@gmail.com</A>> wrote in message <A
href="news:11**********************@s26g2000cwa.go oglegroups.com">news:11**********************@s26g2000cwa.g ooglegroups.com</A>...</DIV>>I would like to use a user control
as a template inside a repeater. > Some of the fields in the control
should be hidden depending on whether > or not there is data.  I'm
still a ASP .Net newbie so the way I'm going > about doing this might be a
little off.  I'd appreciate some help. > > Below is the code I
have thus far but I'm not sure how to reference the > user control within
the foreach loop. > >  <asp:Panel ID="pnlRosterProfile"
runat="Server" /> > >  <asp:Repeater ID="rptRoster"
runat="Server" > >   
<ItemTemplate> >   
</ItemTemplate> >  </asp:Repeater> > > Code
behind: > >      &nbs p; DataSet DS =
SQLRoutines.GetProfiles(strUID, strCCYYS, >
strRosterType); >    &nb sp;   DataRow[]
foundRows =
DS.Tables[0].Select(); >     &n bsp;  foreach
(DataRow dr in foundRows) >     &n bsp; 
{ > >      &nbs p; [User control
here?] >      &nbs p; } > >
 > > ------------------------------------------------- > User
control: > > <%@ Control Language="C#"
AutoEventWireup="true" > CodeFile="ucProfile.ascx.cs"
Inherits="controls_ucRosterProfile" %> >
 >       <asp:Panel ID="pnlProfile"
runat="Server"> >          
<asp:Table ID="tblProfile"
runat="Server"> >            
<asp:TableRow> >   &nbs p;          
<asp:TableCell> >   &nb sp;       &nbsp ;   
<asp:Image ID="imgPhoto" runat="Server"
/> >      &n bsp;      
</asp:TableCell> >    & nbsp;       &nb sp;
<asp:TableCell> >   &nb sp;       &nbsp ;   
<asp:Label ID="lblNameDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblName" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmailDesc" runat="Server" > Font-Bold="true"
Text="Email"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmail" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployerDesc" runat="Server" > Font-Bold="true"
Text="Employer"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployer" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitleDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitle" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >
 >              
</asp:TableCell> >    & nbsp;      
</asp:TableRow> >    &n bsp;    
</asp:Table> >    &nbsp ; 
</asp:Panel> > > > user control code behind: >
 >    public void labelSet(string controlName, bool
blnVisible, string > lblTitle) >   
{ >      &nbsp ; Label
objLabel; >     &nb sp;  objLabel =
(Label)this.FindControl(controlName); >&nbsp ;      
if
(blnVisible) >            
objLabel.Text = lblTitle; >     &nb sp; 
else >      &n bsp;    
objLabel.Visible = false;    >    } >
 > > Thanks, > Robert ></BODY></HTML>

------=_NextPart_000_007B_01C6A12A.759D9DC0--

Jul 6 '06 #3

David Lozzi

Line 27: objLabel.Text = lblTitle;

I believe should be

Line 27: objLabel.Text = lblTitle.text;

--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com
"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@k73g2000cwa.googlegr oups.com...

David,

Thank you! That helped quite a bit. I can now get the user control to
be called multiple times and the template html is displayed. Now I'm
getting an error when I try to reference a method inside of the user
control.

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

Source Error:

Line 25: objLabel = (Label)this.FindControl(controlName);
Line 26: if (blnVisible)
Line 27: objLabel.Text = lblTitle;
Line 28: else
Line 29: objLabel.Visible = false;
Source File: d:\acstest\webroot\MOR\controls\ucRosterProfile.as cx.cs
Line: 27

Below is the code I'm using to call the labelSet method:

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucRo ster");
usc.labelSet("test", true, "test1");
}
}

Do you know what I'm missing to get this to work?

Thanks,
Happy Thursday,
Robert
David Lozzi wrote:
>First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl"
/></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As
System.Web.UI.WebControls.RepeaterItemEventArgs )

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType =
ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of
the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@s26g2000cwa.googleg roups.com...
>I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

------=_NextPart_000_007B_01C6A12A.759D9DC0
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Google-AttachSize: 11079

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.5346.5" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>First add the user
control
to the page declaration</DIV>
<DIV> </DIV>
<DIV><<A
href='mailto:%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%'>%@Register Tagname="usercontrol"
Tagprefix="usa" src="~/controls/usercontrol.ascx"%</A>></DIV>
<DIV> </DIV>
<DIV>then put the user
control in
the repeater</DIV>
<DIV> </DIV>
<DIV><asp:Repeater id=Repeater1 OnItemDataBound="processList"
runat="server"><ITEMTEMPLATE><?xml:namespace prefix = usa
/><usa:usercontrol
id=uscControl runat="Server">   <asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">    <ItemTemplate& gt;<usa:usercontrol
runat="Server" id="uscControl"
/></ItemTemplate>    </asp:Repeater></usa:usercontrol></ITEMTEMPLATE></asp:Repeater></DIV>
<DIV> </DIV>
<DIV>then in the
codebehind</DIV>
<DIV> </DIV>
<DIV>
PrivateSubByValAsObject, ByValAs
System.Web.UI.WebControls.RepeaterItemEventArgs )
   
IfOrThen
   
    DimAs
   
    'now you can access all of the public properties and
methods
of the usercontrol, for example
      
usc.LabelSet("test",true,"test1")
        'and so on
   
EndIf
EndSub</DIV>
<DIV> -- David Lozzi <A
href="mailto:dlozzi@(remove)delphi-ts.com">dlozzi@(remove)delphi-ts.com</A> <A
href="http://www.delphi-ts.com">www.delphi-ts.com</A></DIV>
<DIV> </DIV>
<DIV>"fernandezr"
<<A
href="mailto:ro**************@gmail.com">ro**************@gmail.com</A>> wrote in message <A
href="news:11**********************@s26g2000cwa.g ooglegroups.com">news:11**********************@s26g2000cwa. googlegroups.com</A>...</DIV>>I would like to use a user
control
as a template inside a repeater. > Some of the fields in the
control
should be hidden depending on whether > or not there is data. 
I'm
still a ASP .Net newbie so the way I'm going > about doing this
might be a
little off.  I'd appreciate some help. > > Below is the
code I
have thus far but I'm not sure how to reference the > user control
within
the foreach loop. > >  <asp:Panel
ID="pnlRosterProfile"
runat="Server" /> > >  <asp:Repeater
ID="rptRoster"
runat="Server" > >   
<ItemTemplate> >   
</ItemTemplate> >  </asp:Repeater> >
 > Code
behind: > >      &nbs p;
DataSet DS =
SQLRoutines.GetProfiles(strUID, strCCYYS, >
strRosterType); >    &n bsp;  
DataRow[]
foundRows =
DS.Tables[0].Select(); >     &n bsp; 
foreach
(DataRow dr in
foundRows) >     & nbsp; 
{ > >      &nbs p; [User
control
here?] >      &nbs p; } >
 >
 >
 > ------------------------------------------------- > User
control: > > <%@ Control Language="C#"
AutoEventWireup="true" > CodeFile="ucProfile.ascx.cs"
Inherits="controls_ucRosterProfile" %> >
 >       <asp:Panel
ID="pnlProfile"
runat="Server"> >   &nbsp ;     
<asp:Table ID="tblProfile"
runat="Server"> >   &nbsp ;       
<asp:TableRow> >   &nb sp;       &nbsp ; 
<asp:TableCell> >   &n bsp;       &nbs p;   
<asp:Image ID="imgPhoto" runat="Server"
/> >      &n bsp;      
</asp:TableCell> >    & nbsp;       &nb sp;
<asp:TableCell> >   &n bsp;       &nbs p;   
<asp:Label ID="lblNameDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblName" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmailDesc" runat="Server" > Font-Bold="true"
Text="Email"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmail" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployerDesc" runat="Server" >
Font-Bold="true"
Text="Employer"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployer" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitleDesc" runat="Server" >
Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitle" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >
 >      &nbsp ;      
</asp:TableCell> >    & nbsp;      
</asp:TableRow> >    &n bsp;    
</asp:Table> >    &nbsp ; 
</asp:Panel> > > > user control code
behind: >
 >    public void labelSet(string controlName, bool
blnVisible, string > lblTitle) >   
{ >      &nbs p; Label
objLabel; >     &n bsp;  objLabel =
(Label)this.FindControl(controlName); >&nbs p;      
if
(blnVisible) >    &nbsp ;      
objLabel.Text =
lblTitle; >     &n bsp; 
else >      & nbsp;    
objLabel.Visible = false;   
 >    } >
 > > Thanks, > Robert ></BODY></HTML>

------=_NextPart_000_007B_01C6A12A.759D9DC0--

Jul 7 '06 #4

David Lozzi

My apologies, that is wrong. I misread your code. I thought lblTitle was a
Label, but its a string variable. Anyway, my thoughts on the error is that
this line

>Line 25: objLabel = (Label)this.FindControl(controlName);

is the problem. I'm not familiar with C# at all, i'm a VB developer ;). Is
"this" a valid reference in C#? it isnt in VB, VB uses "me". I don't know
where to go from here without viewing all of the actual code.

good luck

--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com
"David Lozzi" <dl****@nospam.nospamwrote in message
news:O1**************@TK2MSFTNGP03.phx.gbl...

>Line 27: objLabel.Text = lblTitle;

I believe should be

>Line 27: objLabel.Text = lblTitle.text;

--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com
"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@k73g2000cwa.googlegr oups.com...
>David,

Thank you! That helped quite a bit. I can now get the user control to
be called multiple times and the template html is displayed. Now I'm
getting an error when I try to reference a method inside of the user
control.

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

Source Error:

Line 25: objLabel = (Label)this.FindControl(controlName);
Line 26: if (blnVisible)
Line 27: objLabel.Text = lblTitle;
Line 28: else
Line 29: objLabel.Visible = false;
Source File: d:\acstest\webroot\MOR\controls\ucRosterProfile.as cx.cs
Line: 27

Below is the code I'm using to call the labelSet method:

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucR oster");
usc.labelSet("test", true, "test1");
}
}

Do you know what I'm missing to get this to work?

Thanks,
Happy Thursday,
Robert
David Lozzi wrote:
>>First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl"
/></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As
System.Web.UI.WebControls.RepeaterItemEventArg s)

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType =
ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of
the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@s26g2000cwa.google groups.com...
I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on
whether
or not there is data. I'm still a ASP .Net newbie so the way I'm
going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference
the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

------=_NextPart_000_007B_01C6A12A.759D9DC0
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Google-AttachSize: 11079

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.5346.5" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>First add the user
control
to the page declaration</DIV>
<DIV> </DIV>
<DIV><<A
href='mailto:%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%'>%@Register Tagname="usercontrol"
Tagprefix="usa" src="~/controls/usercontrol.ascx"%</A>></DIV>
<DIV> </DIV>
<DIV>then put the user
control in
the repeater</DIV>
<DIV> </DIV>
<DIV><asp:Repeater id=Repeater1 OnItemDataBound="processList"
runat="server"><ITEMTEMPLATE><?xml:namespace prefix = usa
/><usa:usercontrol
id=uscControl runat="Server">   <asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">    <ItemTemplate& gt;<usa:usercontrol
runat="Server" id="uscControl"
/></ItemTemplate>    </asp:Repeater></usa:usercontrol></ITEMTEMPLATE></asp:Repeater></DIV>
<DIV> </DIV>
<DIV>then in the
codebehind</DIV>
<DIV> </DIV>
<DIV>
PrivateSubByValAsObject, ByValAs
System.Web.UI.WebControls.RepeaterItemEventArgs) 
   
IfOrThen
   
    DimAs
   
    'now you can access all of the public properties and
methods
of the usercontrol, for example
      
usc.LabelSet("test",true,"test1")
        'and so
on
   
EndIf
EndSub</DIV>
<DIV> -- David Lozzi <A
href="mailto:dlozzi@(remove)delphi-ts.com">dlozzi@(remove)delphi-ts.com</A> <A
href="http://www.delphi-ts.com">www.delphi-ts.com</A></DIV>
<DIV> </DIV>
<DIV>"fernandezr"
<<A
href="mailto:ro**************@gmail.com">ro**************@gmail.com</A>> wrote in message <A
href="news:11**********************@s26g2000cwa. googlegroups.com">news:11**********************@s26g2000cwa .googlegroups.com</A>...</DIV>>I would like to use a user
control
as a template inside a repeater. > Some of the fields in the
control
should be hidden depending on whether > or not there is
data.  I'm
still a ASP .Net newbie so the way I'm going > about doing this
might be a
little off.  I'd appreciate some help. > > Below is
the code I
have thus far but I'm not sure how to reference the > user control
within
the foreach loop. > >  <asp:Panel
ID="pnlRosterProfile"
runat="Server" /> > >  <asp:Repeater
ID="rptRoster"
runat="Server" > >   
<ItemTemplate> >   
</ItemTemplate> >  </asp:Repeater> >
 > Code
behind: > >      &nbs p;
DataSet DS =
SQLRoutines.GetProfiles(strUID, strCCYYS, >
strRosterType); >    & nbsp;  
DataRow[]
foundRows =
DS.Tables[0].Select(); >     &n bsp; 
foreach
(DataRow dr in
foundRows) >        
{ > >      &nbs p; [User
control
here?] >      &nbs p; } >
 >
 >
 > ------------------------------------------------- > User
control: > > <%@ Control Language="C#"
AutoEventWireup="true" > CodeFile="ucProfile.ascx.cs"
Inherits="controls_ucRosterProfile" %> >
 >       <asp:Panel
ID="pnlProfile"
runat="Server"> >   &nbs p;     
<asp:Table ID="tblProfile"
runat="Server"> >   &nbs p;       
<asp:TableRow> >   &n bsp;       &nbs p; 
<asp:TableCell> >   & nbsp;       &nb sp;   
<asp:Image ID="imgPhoto" runat="Server"
/> >      &n bsp;      
</asp:TableCell> >    & nbsp;       &nb sp;
<asp:TableCell> >   & nbsp;       &nb sp;   
<asp:Label ID="lblNameDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblName" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmailDesc" runat="Server" > Font-Bold="true"
Text="Email"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmail" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployerDesc" runat="Server" >
Font-Bold="true"
Text="Employer"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployer" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitleDesc" runat="Server" >
Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitle" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >
 >      &nbs p;      
</asp:TableCell> >    & nbsp;      
</asp:TableRow> >    &n bsp;    
</asp:Table> >    &nbsp ; 
</asp:Panel> > > > user control code
behind: >
 >    public void labelSet(string controlName, bool
blnVisible, string > lblTitle) >   
{ >      &nb sp; Label
objLabel; >     & nbsp;  objLabel =
(Label)this.FindControl(controlName); >&nb sp;      
if
(blnVisible) >    &nbs p;      
objLabel.Text =
lblTitle; >     & nbsp; 
else >            
objLabel.Visible = false;   
 >    } >
 > > Thanks, > Robert ></BODY></HTML>

------=_NextPart_000_007B_01C6A12A.759D9DC0--

Jul 7 '06 #5

David Lozzi

After further review of your code, I think you're doing too much work. What
are you trying to accomplish?

--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com
"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@k73g2000cwa.googlegr oups.com...

David,

Thank you! That helped quite a bit. I can now get the user control to
be called multiple times and the template html is displayed. Now I'm
getting an error when I try to reference a method inside of the user
control.

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

Source Error:

Line 25: objLabel = (Label)this.FindControl(controlName);
Line 26: if (blnVisible)
Line 27: objLabel.Text = lblTitle;
Line 28: else
Line 29: objLabel.Visible = false;
Source File: d:\acstest\webroot\MOR\controls\ucRosterProfile.as cx.cs
Line: 27

Below is the code I'm using to call the labelSet method:

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucRo ster");
usc.labelSet("test", true, "test1");
}
}

Do you know what I'm missing to get this to work?

Thanks,
Happy Thursday,
Robert
David Lozzi wrote:
>First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl"
/></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As
System.Web.UI.WebControls.RepeaterItemEventArgs )

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType =
ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of
the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@s26g2000cwa.googleg roups.com...
>I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

------=_NextPart_000_007B_01C6A12A.759D9DC0
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Google-AttachSize: 11079

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.5346.5" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>First add the user
control
to the page declaration</DIV>
<DIV> </DIV>
<DIV><<A
href='mailto:%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%'>%@Register Tagname="usercontrol"
Tagprefix="usa" src="~/controls/usercontrol.ascx"%</A>></DIV>
<DIV> </DIV>
<DIV>then put the user
control in
the repeater</DIV>
<DIV> </DIV>
<DIV><asp:Repeater id=Repeater1 OnItemDataBound="processList"
runat="server"><ITEMTEMPLATE><?xml:namespace prefix = usa
/><usa:usercontrol
id=uscControl runat="Server">   <asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">    <ItemTemplate& gt;<usa:usercontrol
runat="Server" id="uscControl"
/></ItemTemplate>    </asp:Repeater></usa:usercontrol></ITEMTEMPLATE></asp:Repeater></DIV>
<DIV> </DIV>
<DIV>then in the
codebehind</DIV>
<DIV> </DIV>
<DIV>
PrivateSubByValAsObject, ByValAs
System.Web.UI.WebControls.RepeaterItemEventArgs )
   
IfOrThen
   
    DimAs
   
    'now you can access all of the public properties and
methods
of the usercontrol, for example
      
usc.LabelSet("test",true,"test1")
        'and so on
   
EndIf
EndSub</DIV>
<DIV> -- David Lozzi <A
href="mailto:dlozzi@(remove)delphi-ts.com">dlozzi@(remove)delphi-ts.com</A> <A
href="http://www.delphi-ts.com">www.delphi-ts.com</A></DIV>
<DIV> </DIV>
<DIV>"fernandezr"
<<A
href="mailto:ro**************@gmail.com">ro**************@gmail.com</A>> wrote in message <A
href="news:11**********************@s26g2000cwa.g ooglegroups.com">news:11**********************@s26g2000cwa. googlegroups.com</A>...</DIV>>I would like to use a user
control
as a template inside a repeater. > Some of the fields in the
control
should be hidden depending on whether > or not there is data. 
I'm
still a ASP .Net newbie so the way I'm going > about doing this
might be a
little off.  I'd appreciate some help. > > Below is the
code I
have thus far but I'm not sure how to reference the > user control
within
the foreach loop. > >  <asp:Panel
ID="pnlRosterProfile"
runat="Server" /> > >  <asp:Repeater
ID="rptRoster"
runat="Server" > >   
<ItemTemplate> >   
</ItemTemplate> >  </asp:Repeater> >
 > Code
behind: > >      &nbs p;
DataSet DS =
SQLRoutines.GetProfiles(strUID, strCCYYS, >
strRosterType); >    &n bsp;  
DataRow[]
foundRows =
DS.Tables[0].Select(); >     &n bsp; 
foreach
(DataRow dr in
foundRows) >     & nbsp; 
{ > >      &nbs p; [User
control
here?] >      &nbs p; } >
 >
 >
 > ------------------------------------------------- > User
control: > > <%@ Control Language="C#"
AutoEventWireup="true" > CodeFile="ucProfile.ascx.cs"
Inherits="controls_ucRosterProfile" %> >
 >       <asp:Panel
ID="pnlProfile"
runat="Server"> >   &nbsp ;     
<asp:Table ID="tblProfile"
runat="Server"> >   &nbsp ;       
<asp:TableRow> >   &nb sp;       &nbsp ; 
<asp:TableCell> >   &n bsp;       &nbs p;   
<asp:Image ID="imgPhoto" runat="Server"
/> >      &n bsp;      
</asp:TableCell> >    & nbsp;       &nb sp;
<asp:TableCell> >   &n bsp;       &nbs p;   
<asp:Label ID="lblNameDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblName" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmailDesc" runat="Server" > Font-Bold="true"
Text="Email"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmail" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployerDesc" runat="Server" >
Font-Bold="true"
Text="Employer"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployer" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitleDesc" runat="Server" >
Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitle" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >
 >      &nbsp ;      
</asp:TableCell> >    & nbsp;      
</asp:TableRow> >    &n bsp;    
</asp:Table> >    &nbsp ; 
</asp:Panel> > > > user control code
behind: >
 >    public void labelSet(string controlName, bool
blnVisible, string > lblTitle) >   
{ >      &nbs p; Label
objLabel; >     &n bsp;  objLabel =
(Label)this.FindControl(controlName); >&nbs p;      
if
(blnVisible) >    &nbsp ;      
objLabel.Text =
lblTitle; >     &n bsp; 
else >      & nbsp;    
objLabel.Visible = false;   
 >    } >
 > > Thanks, > Robert ></BODY></HTML>

------=_NextPart_000_007B_01C6A12A.759D9DC0--

Jul 7 '06 #6

karldirck

There are many possible solutions, of which I favor the following:
Create a class which implements ITemplate.

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace localhost
{
public class RepeaterTest : System.Web.UI.Page
{
protected System.Web.UI.HtmlControls.HtmlForm Form1;
protected MyRepeater myRepeater;

private void Page_Load(object sender, System.EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("col", typeof(string));
dt.Rows.Add(new object[] {"One"});
dt.Rows.Add(new object[] {"Two"});
myRepeater.DataSource = dt.DefaultView;
myRepeater.DataBind();
}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);

myRepeater = new MyRepeater();
Form1.Controls.Add(myRepeater);
}
#endregion
}

// One way to specify your template is to inherit from Repeater, but
you can also set the Template as a property before DataBind()
public class MyRepeater : Repeater
{
protected override void OnInit(EventArgs e)
{
base.OnInit (e);
base.HeaderTemplate = new LiteralTemplate("<table>"); // Custom
Header
base.ItemTemplate = new MyTemplate(); // Custom Item Template
base.FooterTemplate = new LiteralTemplate("</table>"); // Custom
Footer
}
}

public class MyTemplate : ITemplate
{
#region ITemplate Members

public void InstantiateIn(Control container)
{
PlaceHolder Me = new PlaceHolder(); // functions as a container for
your controls
container.Controls.Add(Me); // Add to Controls collection
Me.DataBinding += new EventHandler(Me_DataBinding); // Bind to
DataBinding event
}

#endregion

// For each iteration of data do the following
private void Me_DataBinding(object sender, EventArgs e)
{
PlaceHolder Me = (PlaceHolder) sender; // Cast back to container
control
RepeaterItem container = (RepeaterItem) Me.NamingContainer; //
Casst to Item instance
DataRowView drv = (DataRowView) container.DataItem; // -or-
e.Item.DataItem;
//Repeater repeater = (Repeater) Me.NamingContainer.NamingContainer;
// Optionally you can access the parent repeater.
//DataView datasource = repeater.DataSource as DataView; //
Optionally you can access the original datasource.

Me.Controls.Add(new
LiteralControl(String.Format("<tr><td>{0}</td></tr>", drv[0]))); //
Add your control / content.
}
}
}

fernandezr wrote:

I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

Jul 7 '06 #7

fernandezr

David,

After trying to implement your code I simplified mine. Hopefully this
will clear things up about what I'm trying to do. I have a user
control that will display for each record returned by the dataset. If
fields are blank I will hide those rows in the template for that
record. I am planning on reusing this control on several pages.

<%@ Register TagPrefix="uc1" TagName="profile"
src="~/controls/ucRosterProfile.ascx" %>

<asp:Repeater ID="rptRoster" runat="Server"
OnItemDataBound="processList" >
<ItemTemplate>
<uc1:profile runat="Server" id="ucRoster" />
</ItemTemplate>
</asp:Repeater>

-------------
code behind

DataSet DS = SQLRoutines.GetRosters(int.Parse(strUID), strCCYYS,
int.Parse(strRosterType));
rptRoster.DataSource = DS;
rptRoster.DataBind();

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucRo ster");
usc.labelSet("test", true, "test1");
}
}

--------------------------------------
user control:
<asp:Panel ID="pnlRosterProfile" runat="Server">
<asp:Table ID="tblRosterProfile" runat="Server">
<asp:TableRow>
<asp:TableCell Width="30">
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell Width="45">

<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>

-----
code behind

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}

Thanks,
Happy Friday,
Robert
David Lozzi wrote:

After further review of your code, I think you're doing too much work. What
are you trying to accomplish?

--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com
"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@k73g2000cwa.googlegr oups.com...
David,

Thank you! That helped quite a bit. I can now get the user control to
be called multiple times and the template html is displayed. Now I'm
getting an error when I try to reference a method inside of the user
control.

Exception Details: System.NullReferenceException: Object reference not
set to an instance of an object.

Source Error:

Line 25: objLabel = (Label)this.FindControl(controlName);
Line 26: if (blnVisible)
Line 27: objLabel.Text = lblTitle;
Line 28: else
Line 29: objLabel.Visible = false;
Source File: d:\acstest\webroot\MOR\controls\ucRosterProfile.as cx.cs
Line: 27

Below is the code I'm using to call the labelSet method:

protected void processList(object sender,
System.Web.UI.WebControls.RepeaterItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType
== ListItemType.AlternatingItem))
{
controls_ucRosterProfile usc =
(controls_ucRosterProfile)e.Item.FindControl("ucRo ster");
usc.labelSet("test", true, "test1");
}
}

Do you know what I'm missing to get this to work?

Thanks,
Happy Thursday,
Robert
David Lozzi wrote:
First add the user control to the page declaration

<%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%>

then put the user control in the repeater

<asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">
<ItemTemplate><usa:usercontrol runat="Server" id="uscControl"
/></ItemTemplate>
</asp:Repeater>

then in the codebehind

Private Sub processList(ByVal sender As Object, ByVal e As
System.Web.UI.WebControls.RepeaterItemEventArgs)

If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType =
ListItemType.AlternatingItem Then

Dim usc As your_control = e.Item.FindControl("uscControl")

'now you can access all of the public properties and methods of
the usercontrol, for example

usc.LabelSet("test",true,"test1")

'and so on

End If

End Sub
--
David Lozzi
dlozzi@(remove)delphi-ts.com
www.delphi-ts.com

"fernandezr" <ro**************@gmail.comwrote in message
news:11**********************@s26g2000cwa.googlegr oups.com...
I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

------=_NextPart_000_007B_01C6A12A.759D9DC0
Content-Type: text/html; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
X-Google-AttachSize: 11079

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.5346.5" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY>
<DIV>First add the user
control
to the page declaration</DIV>
<DIV> </DIV>
<DIV><<A
href='mailto:%@Register Tagname="usercontrol" Tagprefix="usa"
src="~/controls/usercontrol.ascx"%'>%@Register Tagname="usercontrol"
Tagprefix="usa" src="~/controls/usercontrol.ascx"%</A>></DIV>
<DIV> </DIV>
<DIV>then put the user
control in
the repeater</DIV>
<DIV> </DIV>
<DIV><asp:Repeater id=Repeater1 OnItemDataBound="processList"
runat="server"><ITEMTEMPLATE><?xml:namespace prefix = usa
/><usa:usercontrol
id=uscControl runat="Server">   <asp:Repeater id="Repeater1" runat="server"
OnItemDataBound="processList">    <ItemTemplate& gt;<usa:usercontrol
runat="Server" id="uscControl"
/></ItemTemplate>    </asp:Repeater></usa:usercontrol></ITEMTEMPLATE></asp:Repeater></DIV>
<DIV> </DIV>
<DIV>then in the
codebehind</DIV>
<DIV> </DIV>
<DIV>
PrivateSubByValAsObject, ByValAs
System.Web.UI.WebControls.RepeaterItemEventArgs)
   
IfOrThen
   
    DimAs
   
    'now you can access all of the public properties and
methods
of the usercontrol, for example
      
usc.LabelSet("test",true,"test1")
        'and so on
   
EndIf
EndSub</DIV>
<DIV> -- David Lozzi <A
href="mailto:dlozzi@(remove)delphi-ts.com">dlozzi@(remove)delphi-ts.com</A> <A
href="http://www.delphi-ts.com">www.delphi-ts.com</A></DIV>
<DIV> </DIV>
<DIV>"fernandezr"
<<A
href="mailto:ro**************@gmail.com">ro**************@gmail.com</A>> wrote in message <A
href="news:11**********************@s26g2000cwa.go oglegroups.com">news:11**********************@s26g2000cwa.g ooglegroups.com</A>...</DIV>>I would like to use a user
control
as a template inside a repeater. > Some of the fields in the
control
should be hidden depending on whether > or not there is data. 
I'm
still a ASP .Net newbie so the way I'm going > about doing this
might be a
little off.  I'd appreciate some help. > > Below is the
code I
have thus far but I'm not sure how to reference the > user control
within
the foreach loop. > >  <asp:Panel
ID="pnlRosterProfile"
runat="Server" /> > >  <asp:Repeater
ID="rptRoster"
runat="Server" > >   
<ItemTemplate> >   
</ItemTemplate> >  </asp:Repeater> >
 > Code
behind: > >      &nbs p;
DataSet DS =
SQLRoutines.GetProfiles(strUID, strCCYYS, >
strRosterType); >    &nb sp;  
DataRow[]
foundRows =
DS.Tables[0].Select(); >     &n bsp; 
foreach
(DataRow dr in
foundRows) >     &n bsp; 
{ > >      &nbs p; [User
control
here?] >      &nbs p; } >
 >
 >
 > ------------------------------------------------- > User
control: > > <%@ Control Language="C#"
AutoEventWireup="true" > CodeFile="ucProfile.ascx.cs"
Inherits="controls_ucRosterProfile" %> >
 >       <asp:Panel
ID="pnlProfile"
runat="Server"> >          
<asp:Table ID="tblProfile"
runat="Server"> >            
<asp:TableRow> >   &nbs p;          
<asp:TableCell> >   &nb sp;       &nbsp ;   
<asp:Image ID="imgPhoto" runat="Server"
/> >      &n bsp;      
</asp:TableCell> >    & nbsp;       &nb sp;
<asp:TableCell> >   &nb sp;       &nbsp ;   
<asp:Label ID="lblNameDesc" runat="Server" > Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblName" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmailDesc" runat="Server" > Font-Bold="true"
Text="Email"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmail" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployerDesc" runat="Server" >
Font-Bold="true"
Text="Employer"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblEmployer" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitleDesc" runat="Server" >
Font-Bold="true"
Text="Name"
/> >      &n bsp;       &nbs p;
<asp:Label ID="lblJobTitle" runat="Server" Text=""
/> >      &n bsp;       &nbs p;
 >
 >              
</asp:TableCell> >    & nbsp;      
</asp:TableRow> >    &n bsp;    
</asp:Table> >    &nbsp ; 
</asp:Panel> > > > user control code
behind: >
 >    public void labelSet(string controlName, bool
blnVisible, string > lblTitle) >   
{ >      &nbsp ; Label
objLabel; >     &nb sp;  objLabel =
(Label)this.FindControl(controlName); >&nbsp ;      
if
(blnVisible) >            
objLabel.Text =
lblTitle; >     &nb sp; 
else >      &n bsp;    
objLabel.Visible = false;   
 >    } >
 > > Thanks, > Robert ></BODY></HTML>

------=_NextPart_000_007B_01C6A12A.759D9DC0--

Jul 7 '06 #8

fernandezr

Could you tell me why you favor this solution over the others? I have
seen a few articles where people mention different solutions, like you
say, it is hard to figure out which would be the best road to take. I
would like the solution to be reusable and efficient.

Thanks,
Robert
ka*******@gmail.com wrote:

There are many possible solutions, of which I favor the following:
Create a class which implements ITemplate.

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace localhost
{
public class RepeaterTest : System.Web.UI.Page
{
protected System.Web.UI.HtmlControls.HtmlForm Form1;
protected MyRepeater myRepeater;

private void Page_Load(object sender, System.EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("col", typeof(string));
dt.Rows.Add(new object[] {"One"});
dt.Rows.Add(new object[] {"Two"});
myRepeater.DataSource = dt.DefaultView;
myRepeater.DataBind();
}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);

myRepeater = new MyRepeater();
Form1.Controls.Add(myRepeater);
}
#endregion
}

// One way to specify your template is to inherit from Repeater, but
you can also set the Template as a property before DataBind()
public class MyRepeater : Repeater
{
protected override void OnInit(EventArgs e)
{
base.OnInit (e);
base.HeaderTemplate = new LiteralTemplate("<table>"); // Custom
Header
base.ItemTemplate = new MyTemplate(); // Custom Item Template
base.FooterTemplate = new LiteralTemplate("</table>"); // Custom
Footer
}
}

public class MyTemplate : ITemplate
{
#region ITemplate Members

public void InstantiateIn(Control container)
{
PlaceHolder Me = new PlaceHolder(); // functions as a container for
your controls
container.Controls.Add(Me); // Add to Controls collection
Me.DataBinding += new EventHandler(Me_DataBinding); // Bind to
DataBinding event
}

#endregion

// For each iteration of data do the following
private void Me_DataBinding(object sender, EventArgs e)
{
PlaceHolder Me = (PlaceHolder) sender; // Cast back to container
control
RepeaterItem container = (RepeaterItem) Me.NamingContainer; //
Casst to Item instance
DataRowView drv = (DataRowView) container.DataItem; // -or-
e.Item.DataItem;
//Repeater repeater = (Repeater) Me.NamingContainer.NamingContainer;
// Optionally you can access the parent repeater.
//DataView datasource = repeater.DataSource as DataView; //
Optionally you can access the original datasource.

Me.Controls.Add(new
LiteralControl(String.Format("<tr><td>{0}</td></tr>", drv[0]))); //
Add your control / content.
}
}
}

fernandezr wrote:
I would like to use a user control as a template inside a repeater.
Some of the fields in the control should be hidden depending on whether
or not there is data. I'm still a ASP .Net newbie so the way I'm going
about doing this might be a little off. I'd appreciate some help.

Below is the code I have thus far but I'm not sure how to reference the
user control within the foreach loop.

<asp:Panel ID="pnlRosterProfile" runat="Server" />

<asp:Repeater ID="rptRoster" runat="Server" >
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>

Code behind:

DataSet DS = SQLRoutines.GetProfiles(strUID, strCCYYS,
strRosterType);
DataRow[] foundRows = DS.Tables[0].Select();
foreach (DataRow dr in foundRows)
{

[User control here?]
}

-------------------------------------------------
User control:

<%@ Control Language="C#" AutoEventWireup="true"
CodeFile="ucProfile.ascx.cs" Inherits="controls_ucRosterProfile" %>

<asp:Panel ID="pnlProfile" runat="Server">
<asp:Table ID="tblProfile" runat="Server">
<asp:TableRow>
<asp:TableCell>
<asp:Image ID="imgPhoto" runat="Server" />
</asp:TableCell>
<asp:TableCell>
<asp:Label ID="lblNameDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblName" runat="Server" Text="" />
 
<asp:Label ID="lblEmailDesc" runat="Server"
Font-Bold="true" Text="Email" />
<asp:Label ID="lblEmail" runat="Server" Text="" />
 
<asp:Label ID="lblEmployerDesc" runat="Server"
Font-Bold="true" Text="Employer" />
<asp:Label ID="lblEmployer" runat="Server" Text="" />
 
<asp:Label ID="lblJobTitleDesc" runat="Server"
Font-Bold="true" Text="Name" />
<asp:Label ID="lblJobTitle" runat="Server" Text="" />
 

</asp:TableCell>
</asp:TableRow>
</asp:Table>
</asp:Panel>
user control code behind:

public void labelSet(string controlName, bool blnVisible, string
lblTitle)
{
Label objLabel;
objLabel = (Label)this.FindControl(controlName);
if (blnVisible)
objLabel.Text = lblTitle;
else
objLabel.Visible = false;
}
Thanks,
Robert

Jul 7 '06 #9

How do you use a user control as a template inside a repeater?

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