Object reference not set to an instance of an object. -- Please Urgent

[Moe Sizlak]

Hi There,

I am trying to write the selected value of a listcontrol when a button is
clicked and I keep getting the error "object not set to a reference of an
object". The libox itself is in a usercontrol and all i'm really needing to
do is get the selected value when the button is clicked on the form.

Can someone tell what I need to include in my page to get this working ?

Moe <><

!-- response.write

response.write (lstS.selectedI tem.tostring())

response.end
!-- class function

Public Class CommonFunctions
Public Shared Function BindStates() as SqlDataReader

Dim myConnection as New
SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))
Const strSQL as String = "SELECT LocationID, Location AS
Location " & _
"FROM tbLocation ORDER BY
Location"
Dim myCommand as New SqlCommand(strS QL, myConnection)
myConnection.Op en()
Dim objDR as SqlDataReader
objDR = myCommand.Execu teReader(Comman dBehavior.Close Connection)
Return objDr
End Function
End Class

!-- bind the contro

lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))

!- lisbox on page

<asp:listbox id="lstS" runat="server" rows=1
DataTextField=" Location" DataValueField= "LocationID "/>

[S. Justin Gengo]

Moe,

First I am assuming that you aren't trying to repsponse.write the value
until after it's selected. You'll get the object reference error right away
otherwise since no value has been selected yet.

Second, you need to make certain that the code populating the list only
fires on page load. If not, it is resetting the list every time. Do this
with the following if then:

If Not Page.IsPostBack Then
'---Populate list only once here
End If
--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi There,

I am trying to write the selected value of a listcontrol when a button is
clicked and I keep getting the error "object not set to a reference of an
object". The libox itself is in a usercontrol and all i'm really needing to do is get the selected value when the button is clicked on the form.

Can someone tell what I need to include in my page to get this working ?

Moe <><

!-- response.write

response.write (lstS.selectedI tem.tostring())

response.end
!-- class function

Public Class CommonFunctions
Public Shared Function BindStates() as SqlDataReader

Dim myConnection as New
SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))
Const strSQL as String = "SELECT LocationID, Location AS
Location " & _
"FROM tbLocation ORDER BY
Location"
Dim myCommand as New SqlCommand(strS QL, myConnection)
myConnection.Op en()
Dim objDR as SqlDataReader
objDR = myCommand.Execu teReader(Comman dBehavior.Close Connection)
Return objDr
End Function
End Class

!-- bind the contro

lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))

!- lisbox on page

<asp:listbox id="lstS" runat="server" rows=1
DataTextField=" Location" DataValueField= "LocationID "/>

[Moe Sizlak]

Hi Justin,

I have the listmenu on the page and I do make sure that the menu is selected
before clicking the button, the load sud where I bind the list is in the
user control. Would this make a difference?

Moe

Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
If Not Page.IsPostBack Then
lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))
End If
End Sub
"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

First I am assuming that you aren't trying to repsponse.write the value
until after it's selected. You'll get the object reference error right away otherwise since no value has been selected yet.

Second, you need to make certain that the code populating the list only
fires on page load. If not, it is resetting the list every time. Do this
with the following if then:

If Not Page.IsPostBack Then
'---Populate list only once here
End If
--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi There,

I am trying to write the selected value of a listcontrol when a button is clicked and I keep getting the error "object not set to a reference of an object". The libox itself is in a usercontrol and all i'm really needing

to

do is get the selected value when the button is clicked on the form.

Can someone tell what I need to include in my page to get this working ?

Moe <><

!-- response.write

response.write (lstS.selectedI tem.tostring())

response.end
!-- class function

Public Class CommonFunctions
Public Shared Function BindStates() as SqlDataReader

Dim myConnection as New
SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))
Const strSQL as String = "SELECT LocationID, Location AS
Location " & _
"FROM tbLocation ORDER BY
Location"
Dim myCommand as New SqlCommand(strS QL, myConnection)
myConnection.Op en()
Dim objDR as SqlDataReader
objDR = myCommand.Execu teReader(Comman dBehavior.Close Connection) Return objDr
End Function
End Class

!-- bind the contro

lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))

!- lisbox on page

<asp:listbox id="lstS" runat="server" rows=1
DataTextField=" Location" DataValueField= "LocationID "/>

[S. Justin Gengo]

Moe,

No, that looks good. It shouldn't make a difference that it's in a user
control.

Are you adding the user control to the page dynamically?

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:e%******** ********@TK2MSF TNGP09.phx.gbl. ..

Hi Justin,

I have the listmenu on the page and I do make sure that the menu is selected before clicking the button, the load sud where I bind the list is in the
user control. Would this make a difference?

Moe

Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
If Not Page.IsPostBack Then
lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))
End If
End Sub
"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

First I am assuming that you aren't trying to repsponse.write the value
until after it's selected. You'll get the object reference error right

away

otherwise since no value has been selected yet.

Second, you need to make certain that the code populating the list only
fires on page load. If not, it is resetting the list every time. Do this
with the following if then:

If Not Page.IsPostBack Then
'---Populate list only once here
End If
--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..

Hi There,

I am trying to write the selected value of a listcontrol when a button is clicked and I keep getting the error "object not set to a reference of an object". The libox itself is in a usercontrol and all i'm really needing

to

do is get the selected value when the button is clicked on the form.

Can someone tell what I need to include in my page to get this working

?
Moe <><

!-- response.write

response.write (lstS.selectedI tem.tostring())

response.end
!-- class function

Public Class CommonFunctions
Public Shared Function BindStates() as SqlDataReader

Dim myConnection as New
SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))
Const strSQL as String = "SELECT LocationID, Location AS Location " & _
"FROM tbLocation ORDER BY
Location"
Dim myCommand as New SqlCommand(strS QL, myConnection)
myConnection.Op en()
Dim objDR as SqlDataReader
objDR =

myCommand.Execu teReader(Comman dBehavior.Close Connection) Return objDr
End Function
End Class

!-- bind the contro

lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))

!- lisbox on page

<asp:listbox id="lstS" runat="server" rows=1
DataTextField=" Location" DataValueField= "LocationID "/>

[Moe Sizlak]

Hi Justin,

The control I am using is "includes/_control_conten t.ascx" and I just
include it in the main page. What else could it be?

Sean

<% @Import Namespace="Syst em.Data" %>
<% @Import Namespace="Syst em.Data.SqlClie nt" %>
<% @Import Namespace="Syst em.Web.UI.WebCo ntrols.DropDown List" %>
<%@ Import Namespace="Syst em.Web.UI.WebCo ntrols.CheckBox " %>
<%@ Register TagPrefix="User Control2" TagName="PlaceH eader"
Src="includes/_placelistingsu ser_header.ascx " %>
<%@ Register TagPrefix="User Control3" TagName="Contro l"
Src="includes/_control_conten t.ascx" %>
<%@ Register TagPrefix="User Control4" TagName="FormLi st"
Src="includes/_formlist_conte nt.ascx" %>
<link rel="stylesheet " type="text/css" href=">
<script language="vb" runat="server">

</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="distribut ion" content="global ">
<meta name="revisit-after" content="14 days">
<meta name="ROBOTS" content="ALL">

<title>title</title>
</head>
<form enctype="multip art/form-data" runat="server">
<body topmargin="0" marginheight="0 " marginwidth="0" >
<table width="100%" border="0" cellpadding="0" cellspacing="0" >
<td colspan="2" valign=top><Use rControl2:Place Header runat="server"
/></td>
<tr>
<td width="563" valign=top style="padding-left:40px "><div align=left
class=formtext sty style="padding-left:8px "></div><br><UserCo ntrol3:Control
runat="server" /></td>
<td>2</td>
</tr>

<TR>
<td colspan=2>&nbsp ;</td>
<td>
</tr>
</table>
</form>
</body>
</html>

"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

No, that looks good. It shouldn't make a difference that it's in a user
control.

Are you adding the user control to the page dynamically?

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:e%******** ********@TK2MSF TNGP09.phx.gbl. ..

Hi Justin,

I have the listmenu on the page and I do make sure that the menu is selected

before clicking the button, the load sud where I bind the list is in the
user control. Would this make a difference?

Moe

Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
If Not Page.IsPostBack Then
lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))
End If
End Sub
"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

First I am assuming that you aren't trying to repsponse.write the value until after it's selected. You'll get the object reference error right

away

otherwise since no value has been selected yet.

Second, you need to make certain that the code populating the list only fires on page load. If not, it is resetting the list every time. Do this with the following if then:

If Not Page.IsPostBack Then
'---Populate list only once here
End If
--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. ..
> Hi There,
>
> I am trying to write the selected value of a listcontrol when a button

is

> clicked and I keep getting the error "object not set to a reference

of

an

> object". The libox itself is in a usercontrol and all i'm really

needing to
> do is get the selected value when the button is clicked on the form.
>
> Can someone tell what I need to include in my page to get this

working ? >
> Moe <><
>
> !-- response.write
>
> response.write (lstS.selectedI tem.tostring())
>
> response.end
>
>
> !-- class function
>
> Public Class CommonFunctions
> Public Shared Function BindStates() as SqlDataReader
>
> Dim myConnection as New
> SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))
> Const strSQL as String = "SELECT LocationID, Location AS > Location " & _
> "FROM tbLocation ORDER

BY > Location"
> Dim myCommand as New SqlCommand(strS QL, myConnection)
> myConnection.Op en()
> Dim objDR as SqlDataReader
> objDR =

myCommand.Execu teReader(Comman dBehavior.Close Connection)

> Return objDr
> End Function
> End Class
>
> !-- bind the contro
>
> lstS.DataSource = CommonFunctions .BindStates
> lstS.DataBind()
> lstS.Items.Inse rt(0, new ListItem("By State","0"))
>
> !- lisbox on page
>
> <asp:listbox id="lstS" runat="server" rows=1
> DataTextField=" Location" DataValueField= "LocationID "/> >
>

[Moe Sizlak]

Hi Justin,

Any other ideas? have a forgotten to declare something in my page?


"Moe Sizlak" <mo*@moe.com> wrote in message
news:uD******** ******@TK2MSFTN GP10.phx.gbl...

Hi Justin,

The control I am using is "includes/_control_conten t.ascx" and I just
include it in the main page. What else could it be?

Sean

<% @Import Namespace="Syst em.Data" %>
<% @Import Namespace="Syst em.Data.SqlClie nt" %>
<% @Import Namespace="Syst em.Web.UI.WebCo ntrols.DropDown List" %>
<%@ Import Namespace="Syst em.Web.UI.WebCo ntrols.CheckBox " %>
<%@ Register TagPrefix="User Control2" TagName="PlaceH eader"
Src="includes/_placelistingsu ser_header.ascx " %>
<%@ Register TagPrefix="User Control3" TagName="Contro l"
Src="includes/_control_conten t.ascx" %>
<%@ Register TagPrefix="User Control4" TagName="FormLi st"
Src="includes/_formlist_conte nt.ascx" %>
<link rel="stylesheet " type="text/css" href=">
<script language="vb" runat="server">

</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="distribut ion" content="global ">
<meta name="revisit-after" content="14 days">
<meta name="ROBOTS" content="ALL">

<title>title</title>
</head>
<form enctype="multip art/form-data" runat="server">
<body topmargin="0" marginheight="0 " marginwidth="0" >
<table width="100%" border="0" cellpadding="0" cellspacing="0" >
<td colspan="2" valign=top><Use rControl2:Place Header runat="server"
/></td>
<tr>
<td width="563" valign=top style="padding-left:40px "><div align=left
class=formtext sty style="padding-left:8px "></div><br><UserCo ntrol3:Control runat="server" /></td>
<td>2</td>
</tr>

<TR>
<td colspan=2>&nbsp ;</td>
<td>
</tr>
</table>
</form>
</body>
</html>

"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

No, that looks good. It shouldn't make a difference that it's in a user
control.

Are you adding the user control to the page dynamically?

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:e%******** ********@TK2MSF TNGP09.phx.gbl. ..

Hi Justin,

I have the listmenu on the page and I do make sure that the menu is selected

before clicking the button, the load sud where I bind the list is in the user control. Would this make a difference?

Moe

Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
If Not Page.IsPostBack Then
lstS.DataSource = CommonFunctions .BindStates
lstS.DataBind()
lstS.Items.Inse rt(0, new ListItem("By State","0"))
End If
End Sub
"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message news:10******** *****@corp.supe rnews.com...
> Moe,
>
> First I am assuming that you aren't trying to repsponse.write the value > until after it's selected. You'll get the object reference error right away
> otherwise since no value has been selected yet.
>
> Second, you need to make certain that the code populating the list only > fires on page load. If not, it is resetting the list every time. Do this > with the following if then:
>
> If Not Page.IsPostBack Then
> '---Populate list only once here
> End If
>
>
> --
> Sincerely,
>
> S. Justin Gengo, MCP
> Web Developer / Programmer
>
> www.aboutfortunate.com
>
> "Out of chaos comes order."
> Nietzsche
> "Moe Sizlak" <mo*@moe.com> wrote in message
> news:%2******** ********@tk2msf tngp13.phx.gbl. ..
> > Hi There,
> >
> > I am trying to write the selected value of a listcontrol when a button is
> > clicked and I keep getting the error "object not set to a reference of

an
> > object". The libox itself is in a usercontrol and all i'm really needing

> to
> > do is get the selected value when the button is clicked on the

form. > >
> > Can someone tell what I need to include in my page to get this working

?

> >
> > Moe <><
> >
> > !-- response.write
> >
> > response.write (lstS.selectedI tem.tostring())
> >
> > response.end
> >
> >
> > !-- class function
> >
> > Public Class CommonFunctions
> > Public Shared Function BindStates() as SqlDataReader
> >
> > Dim myConnection as New
> > SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring")) > > Const strSQL as String = "SELECT LocationID,

Location AS

> > Location " & _
> > "FROM tbLocation

ORDER BY > > Location"
> > Dim myCommand as New SqlCommand(strS QL, myConnection)
> > myConnection.Op en()
> > Dim objDR as SqlDataReader
> > objDR =
myCommand.Execu teReader(Comman dBehavior.Close Connection)
> > Return objDr
> > End Function
> > End Class
> >
> > !-- bind the contro
> >
> > lstS.DataSource = CommonFunctions .BindStates
> > lstS.DataBind()
> > lstS.Items.Inse rt(0, new ListItem("By State","0"))
> >
> > !- lisbox on page
> >
> > <asp:listbox id="lstS" runat="server" rows=1
> > DataTextField=" Location" DataValueField= "LocationID "/> > >
> >
>
>

[S. Justin Gengo]

Moe,

Are you trying to response.write the value from the user control itself or
from the page the control is on?

If you are trying to write it from the page the control is on you can't
refer to it directly. You have to refer to it through the user control
itself.

You could do this two ways:

One would be to just response.write the value from the control itself using
the data list's OnSelectedValue Changed handler

The other would be to use FindControl on the main page to get a reference to
the user control object and then use that to refer to the datalist.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:eD******** ******@TK2MSFTN GP11.phx.gbl...

Hi Justin,

Any other ideas? have a forgotten to declare something in my page?


"Moe Sizlak" <mo*@moe.com> wrote in message
news:uD******** ******@TK2MSFTN GP10.phx.gbl...

Hi Justin,

The control I am using is "includes/_control_conten t.ascx" and I just
include it in the main page. What else could it be?

Sean

<% @Import Namespace="Syst em.Data" %>
<% @Import Namespace="Syst em.Data.SqlClie nt" %>
<% @Import Namespace="Syst em.Web.UI.WebCo ntrols.DropDown List" %>
<%@ Import Namespace="Syst em.Web.UI.WebCo ntrols.CheckBox " %>
<%@ Register TagPrefix="User Control2" TagName="PlaceH eader"
Src="includes/_placelistingsu ser_header.ascx " %>
<%@ Register TagPrefix="User Control3" TagName="Contro l"
Src="includes/_control_conten t.ascx" %>
<%@ Register TagPrefix="User Control4" TagName="FormLi st"
Src="includes/_formlist_conte nt.ascx" %>
<link rel="stylesheet " type="text/css" href=">
<script language="vb" runat="server">

</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="distribut ion" content="global ">
<meta name="revisit-after" content="14 days">
<meta name="ROBOTS" content="ALL">

<title>title</title>
</head>
<form enctype="multip art/form-data" runat="server">
<body topmargin="0" marginheight="0 " marginwidth="0" >
<table width="100%" border="0" cellpadding="0" cellspacing="0" >
<td colspan="2" valign=top><Use rControl2:Place Header runat="server"
/></td>
<tr>
<td width="563" valign=top style="padding-left:40px "><div align=left

class=formtext sty style="padding-left:8px

"></div><br><UserCo ntrol3:Control

runat="server" /></td>
<td>2</td>
</tr>

<TR>
<td colspan=2>&nbsp ;</td>
<td>
</tr>
</table>
</form>
</body>
</html>

"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

No, that looks good. It shouldn't make a difference that it's in a user control.

Are you adding the user control to the page dynamically?

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:e%******** ********@TK2MSF TNGP09.phx.gbl. ..
> Hi Justin,
>
> I have the listmenu on the page and I do make sure that the menu is
selected
> before clicking the button, the load sud where I bind the list is in the > user control. Would this make a difference?
>
> Moe
>
> Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
> If Not Page.IsPostBack Then
> lstS.DataSource = CommonFunctions .BindStates
> lstS.DataBind()
> lstS.Items.Inse rt(0, new ListItem("By State","0"))
> End If
> End Sub
>
>
> "S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message > news:10******** *****@corp.supe rnews.com...
> > Moe,
> >
> > First I am assuming that you aren't trying to repsponse.write the

value

> > until after it's selected. You'll get the object reference error right > away
> > otherwise since no value has been selected yet.
> >
> > Second, you need to make certain that the code populating the list

only

> > fires on page load. If not, it is resetting the list every time.

Do this

> > with the following if then:
> >
> > If Not Page.IsPostBack Then
> > '---Populate list only once here
> > End If
> >
> >
> > --
> > Sincerely,
> >
> > S. Justin Gengo, MCP
> > Web Developer / Programmer
> >
> > www.aboutfortunate.com
> >
> > "Out of chaos comes order."
> > Nietzsche
> > "Moe Sizlak" <mo*@moe.com> wrote in message
> > news:%2******** ********@tk2msf tngp13.phx.gbl. ..
> > > Hi There,
> > >
> > > I am trying to write the selected value of a listcontrol when a

button

> is
> > > clicked and I keep getting the error "object not set to a

reference

of

> an
> > > object". The libox itself is in a usercontrol and all i'm really
needing
> > to
> > > do is get the selected value when the button is clicked on the

form. > > >
> > > Can someone tell what I need to include in my page to get this

working

?
> > >
> > > Moe <><
> > >
> > > !-- response.write
> > >
> > > response.write (lstS.selectedI tem.tostring())
> > >
> > > response.end
> > >
> > >
> > > !-- class function
> > >
> > > Public Class CommonFunctions
> > > Public Shared Function BindStates() as SqlDataReader
> > >
> > > Dim myConnection as New
> > > SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring")) > > > Const strSQL as String = "SELECT LocationID, Location AS
> > > Location " & _
> > > "FROM tbLocation

ORDER

BY

> > > Location"
> > > Dim myCommand as New SqlCommand(strS QL, myConnection)
> > > myConnection.Op en()
> > > Dim objDR as SqlDataReader
> > > objDR =
> myCommand.Execu teReader(Comman dBehavior.Close Connection)
> > > Return objDr
> > > End Function
> > > End Class
> > >
> > > !-- bind the contro
> > >
> > > lstS.DataSource = CommonFunctions .BindStates
> > > lstS.DataBind()
> > > lstS.Items.Inse rt(0, new ListItem("By State","0"))
> > >
> > > !- lisbox on page
> > >
> > > <asp:listbox id="lstS" runat="server" rows=1
> > > DataTextField=" Location"

DataValueField= "LocationID "/>

> > >
> > >
> >
> >
>
>

[Moe Sizlak]

Hi Justin,

I am trying to use the response.write from the user control itself, I
managed to create a class in a code behind then reference the control in the
usercontrol page. The control displays correctly but when I try to catch the
value from the listbox it gives me the message "text is not a member of
string". I know that I'm almost there!!

Once I have the basic framework with this piece of code I will be able to
rollon from there.

Sean

"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message
news:10******** *****@corp.supe rnews.com...

Moe,

Are you trying to response.write the value from the user control itself or
from the page the control is on?

If you are trying to write it from the page the control is on you can't
refer to it directly. You have to refer to it through the user control
itself.

You could do this two ways:

One would be to just response.write the value from the control itself using the data list's OnSelectedValue Changed handler

The other would be to use FindControl on the main page to get a reference to the user control object and then use that to refer to the datalist.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"Moe Sizlak" <mo*@moe.com> wrote in message
news:eD******** ******@TK2MSFTN GP11.phx.gbl...

Hi Justin,

Any other ideas? have a forgotten to declare something in my page?


"Moe Sizlak" <mo*@moe.com> wrote in message
news:uD******** ******@TK2MSFTN GP10.phx.gbl...

Hi Justin,

The control I am using is "includes/_control_conten t.ascx" and I just
include it in the main page. What else could it be?

Sean

<% @Import Namespace="Syst em.Data" %>
<% @Import Namespace="Syst em.Data.SqlClie nt" %>
<% @Import Namespace="Syst em.Web.UI.WebCo ntrols.DropDown List" %>
<%@ Import Namespace="Syst em.Web.UI.WebCo ntrols.CheckBox " %>
<%@ Register TagPrefix="User Control2" TagName="PlaceH eader"
Src="includes/_placelistingsu ser_header.ascx " %>
<%@ Register TagPrefix="User Control3" TagName="Contro l"
Src="includes/_control_conten t.ascx" %>
<%@ Register TagPrefix="User Control4" TagName="FormLi st"
Src="includes/_formlist_conte nt.ascx" %>
<link rel="stylesheet " type="text/css" href=">
<script language="vb" runat="server">

</script>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name="distribut ion" content="global ">
<meta name="revisit-after" content="14 days">
<meta name="ROBOTS" content="ALL">

<title>title</title>
</head>
<form enctype="multip art/form-data" runat="server">
<body topmargin="0" marginheight="0 " marginwidth="0" >
<table width="100%" border="0" cellpadding="0" cellspacing="0" >
<td colspan="2" valign=top><Use rControl2:Place Header runat="server" /></td>
<tr>
<td width="563" valign=top style="padding-left:40px "><div align=left class=formtext sty style="padding-left:8px

"></div><br><UserCo ntrol3:Control

runat="server" /></td>
<td>2</td>
</tr>

<TR>
<td colspan=2>&nbsp ;</td>
<td>
</tr>
</table>
</form>
</body>
</html>

"S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in message news:10******** *****@corp.supe rnews.com...
> Moe,
>
> No, that looks good. It shouldn't make a difference that it's in a user > control.
>
> Are you adding the user control to the page dynamically?
>
> --
> Sincerely,
>
> S. Justin Gengo, MCP
> Web Developer / Programmer
>
> www.aboutfortunate.com
>
> "Out of chaos comes order."
> Nietzsche
> "Moe Sizlak" <mo*@moe.com> wrote in message
> news:e%******** ********@TK2MSF TNGP09.phx.gbl. ..
> > Hi Justin,
> >
> > I have the listmenu on the page and I do make sure that the menu is > selected
> > before clicking the button, the load sud where I bind the list is in

the

> > user control. Would this make a difference?
> >
> > Moe
> >
> > Sub Page_Load(byVal obj As Object, byVal e As EventArgs)
> > If Not Page.IsPostBack Then
> > lstS.DataSource = CommonFunctions .BindStates
> > lstS.DataBind()
> > lstS.Items.Inse rt(0, new ListItem("By State","0"))
> > End If
> > End Sub
> >
> >
> > "S. Justin Gengo" <sjgengo@aboutf ortunate[no-spam].com> wrote in

message

> > news:10******** *****@corp.supe rnews.com...
> > > Moe,
> > >
> > > First I am assuming that you aren't trying to repsponse.write

the value
> > > until after it's selected. You'll get the object reference error

right

> > away
> > > otherwise since no value has been selected yet.
> > >
> > > Second, you need to make certain that the code populating the list only
> > > fires on page load. If not, it is resetting the list every time.

Do this
> > > with the following if then:
> > >
> > > If Not Page.IsPostBack Then
> > > '---Populate list only once here
> > > End If
> > >
> > >
> > > --
> > > Sincerely,
> > >
> > > S. Justin Gengo, MCP
> > > Web Developer / Programmer
> > >
> > > www.aboutfortunate.com
> > >
> > > "Out of chaos comes order."
> > > Nietzsche
> > > "Moe Sizlak" <mo*@moe.com> wrote in message
> > > news:%2******** ********@tk2msf tngp13.phx.gbl. ..
> > > > Hi There,
> > > >
> > > > I am trying to write the selected value of a listcontrol when a button
> > is
> > > > clicked and I keep getting the error "object not set to a

reference

of
> > an
> > > > object". The libox itself is in a usercontrol and all i'm really > needing
> > > to
> > > > do is get the selected value when the button is clicked on the

form.

> > > >
> > > > Can someone tell what I need to include in my page to get this
working
> ?
> > > >
> > > > Moe <><
> > > >
> > > > !-- response.write
> > > >
> > > > response.write (lstS.selectedI tem.tostring())
> > > >
> > > > response.end
> > > >
> > > >
> > > > !-- class function
> > > >
> > > > Public Class CommonFunctions
> > > > Public Shared Function BindStates() as SqlDataReader
> > > >
> > > > Dim myConnection as New
> > > >

SqlConnection(C onfigurationSet tings.AppSettin gs("connectionS tring"))

> > > > Const strSQL as String = "SELECT LocationID,

Location

> AS
> > > > Location " & _
> > > > "FROM tbLocation

ORDER

BY
> > > > Location"
> > > > Dim myCommand as New SqlCommand(strS QL, myConnection) > > > > myConnection.Op en()
> > > > Dim objDR as SqlDataReader
> > > > objDR =
> > myCommand.Execu teReader(Comman dBehavior.Close Connection)
> > > > Return objDr
> > > > End Function
> > > > End Class
> > > >
> > > > !-- bind the contro
> > > >
> > > > lstS.DataSource = CommonFunctions .BindStates
> > > > lstS.DataBind()
> > > > lstS.Items.Inse rt(0, new ListItem("By State","0"))
> > > >
> > > > !- lisbox on page
> > > >
> > > > <asp:listbox id="lstS" runat="server" rows=1
> > > > DataTextField=" Location"
DataValueField= "LocationID "/>
> > > >
> > > >
> > >
> > >
> >
> >
>
>

[Dan Williams]

Hi.

Did anyone manage to find the solution to this problem?

I'm having a similar issue with populating a drop-down list menu from
a SQLDataReader.

Here is my function:-

Function SelectOptions(B yVal queryString) As
System.Data.Sql Client.SqlDataR eader
' Application("Co nnectionString" ) is set in our global.asax file

Dim sqlConnection As System.Data.Sql Client.SqlConne ction = New
System.Data.Sql Client.SqlConne ction(Applicati on("ConnectionS tring"))

Dim sqlCommand As System.Data.Sql Client.SqlComma nd = New
System.Data.Sql Client.SqlComma nd(queryString, sqlConnection)

sqlConnection.O pen()
Dim dataReader As System.Data.Sql Client.SqlDataR eader =
sqlCommand.Exec uteReader(Syste m.Data.CommandB ehavior.CloseCo nnection)

Return dataReader
End Function

If I call this function directly in my aspx page it works fine, no
problem.

However, if i attempt to call it via my own custom web user control
ascx page, it causes a "Object reference not set to an instance of an
object." error.

Here is my non-working code:-

Dim func As New CommonFunctions
dropdownlist.Da taSource = func.SelectOpti ons("SELECT colname FROM
table")
dropdownlist.Da taBind()

Any help is much appreciated.

Thanks in advance

Dan Williams.

[Dan Williams]

It appears that my web user control didn't like my
Application("Co nnectionString" ) setting.

As soon as i referenced it using
System.Web.Http Context.Current .Application("c onnectionString "), it
worked straight away, no problem.

Cheers

Dan.

da**********@ne wcross-nursing.com (Dan Williams) wrote in message news:<2e******* *************** **@posting.goog le.com>...

Hi.

Did anyone manage to find the solution to this problem?

I'm having a similar issue with populating a drop-down list menu from
a SQLDataReader.

Here is my function:-

Function SelectOptions(B yVal queryString) As
System.Data.Sql Client.SqlDataR eader
' Application("Co nnectionString" ) is set in our global.asax file

Dim sqlConnection As System.Data.Sql Client.SqlConne ction = New
System.Data.Sql Client.SqlConne ction(Applicati on("ConnectionS tring"))

Dim sqlCommand As System.Data.Sql Client.SqlComma nd = New
System.Data.Sql Client.SqlComma nd(queryString, sqlConnection)

sqlConnection.O pen()
Dim dataReader As System.Data.Sql Client.SqlDataR eader =
sqlCommand.Exec uteReader(Syste m.Data.CommandB ehavior.CloseCo nnection)

Return dataReader
End Function

If I call this function directly in my aspx page it works fine, no
problem.

However, if i attempt to call it via my own custom web user control
ascx page, it causes a "Object reference not set to an instance of an
object." error.

Here is my non-working code:-

Dim func As New CommonFunctions
dropdownlist.Da taSource = func.SelectOpti ons("SELECT colname FROM
table")
dropdownlist.Da taBind()

Any help is much appreciated.

Thanks in advance

Dan Williams.