Name not exists when it obviously does.

tshad

I am getting an error on a object name that doesn't exist (according to asp.net), but if you look at the trace, it does.

Here is the error:

*************** *************** *************** *************** *************** *************** *
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30451: Name 'txtQuestion' is not declared.

Source Error:

Line 102: Dim positionID as Integer = Session("Positi onID")
Line 103:
Line 104:trace.warn( "txtQuestio n = " & txtQuestion.tex t)
*************** *************** *************** *************** *************** *************** *

Here is the asp code showing it as part of the EditItemTemplat e - so of course it doesn't exist when the page is first displayed(last line shows it):
*************** *************** *************** *************** *************** ***************
<EditItemTempla te>
<table border="1" width="100%" CellPadding="0" CellSpacing="0" style="margin:0 ">
<tr>
<td>
<asp:ImageButto n ID="ExpandButto n" runat="server" Font-Size="2" ImageUrl="../images/expand.gif" Width="16" Height="16" CommandName="Se lect" AlternateText=" Click here to see details"></asp:ImageButton >
</td>
<td>
<asp:ImageButto n ID="CollapseBut ton" visible="false" runat="server" Font-Size="2" ImageUrl="../images/collapse.gif" Width="16" Height="16" CommandName="Se lect" AlternateText=" Click here to see details"></asp:ImageButton >
<asp:label id="PositionID " Visible="false" runat="server" Text='<%# DataBinder.Eval (Container.Data Item, "PositionID ") %>' />
<asp:label id="QuestionUni que" Visible="false" runat="server" Text='<%# DataBinder.Eval (Container.Data Item, "QuestionUnique ") %>' />
</td>
<td width="100%">

<asp:TextBox id="txtQuestion " columns="60" MaxLength="50" runat="server" Text='<%# DataBinder.Eval (Container.Data Item, "Question") %>' />
*************** *************** *************** *************** *************** *************** *

Here is the trace.route showing it (I had to comment out the trace.warn statement to get it):

*************** *************** *************** *************** *************** ************
DataList1System .Web.UI.WebCont rols.DataList52 83100 DataList1:_ctl0 System.Web.UI.W ebControls.Data ListItem9860 DataList1:_ctl0 :_ctl2System.We b.UI.LiteralCon trol1340 DataList1:_ctl0 :ExpandButtonSy stem.Web.UI.Web Controls.ImageB utton1620 DataList1:_ctl0 :_ctl3System.We b.UI.LiteralCon trol460 DataList1:_ctl0 :CollapseButton System.Web.UI.W ebControls.Imag eButton00 DataList1:_ctl0 :_ctl4System.We b.UI.LiteralCon trol130 DataList1:_ctl0 :PositionIDSyst em.Web.UI.WebCo ntrols.Label032 DataList1:_ctl0 :_ctl5System.We b.UI.LiteralCon trol130 DataList1:_ctl0 :QuestionUnique System.Web.UI.W ebControls.Labe l028 DataList1:_ctl0 :_ctl6System.We b.UI.LiteralCon trol590
---> DataList1:_ctl0 :txtQuestion System.Web.UI.W ebControls.Text Box1650 DataList1:_ctl0 :_ctl7System.We b.UI.LiteralCon trol650 DataList1:_ctl0 :_ctl0System.We b.UI.WebControl s.Button670 DataList1:_ctl0 :_ctl8System.We b.UI.LiteralCon trol130 DataList1:_ctl0 :_ctl1System.We b.UI.WebControl s.Button670 DataList1:_ctl0 :_ctl9System.We b.UI.LiteralCon trol1220 DataList1:_ctl0 :DataGrid1Syste m.Web.UI.WebCon trols.DataGrid0 136 DataList1:_ctl0 :_ctl10System.W eb.UI.LiteralCo ntrol600 DataList1:_ctl1 System.Web.UI.W ebControls.Data ListItem400 *************** *************** *************** *************** *************** **************

This does not show up on the first page (as we are not in edit mode yet), but I am getting the error before the first page is executed. We do not go into this subroutine except during editing mode - when the object would exist.

Why would I get the error at this time and how do I get around this?

Thanks

Tom

Nov 19 '05 #1

Subscribe Reply

1604

Karl Seguin

Tom,
It's hard to be sure without more context, but it seems pretty clear that
infact txtQuestion DOES NOT exist. What does exist is
DataList1:_ctl0 :txtQuestion which is quite different. If you want to get a
reference to txtQuestion, you need to do a FindControl("tx tQuestion")
within the edit template.

In other words, what you see as txtQuestion is a control embedded within
other controls (from what you've shown, that's a datalist containing an
editTemplate which contains a textbox). It therefore isnt simply available
as "txtQuestio n". It only exists as "txtQuestio n" as far as the edit
template is concerned. So to get it, you need to do:

private Sub Edit_Command(se nder As Object, e As DataListCommand EventArgs)
...
dim txt as TextBox = ctype(e.Item.Fi ndControl("txtQ uestion"), TextBox)
...
end sub

Karl

P.S. - Option Strict is your friend in VB.Net
--
MY ASP.Net tutorials
http://www.openmymind.net/
"tshad" <ts**********@f tsolutions.com> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..
I am getting an error on a object name that doesn't exist (according to
asp.net), but if you look at the trace, it does.

Here is the error:

*************** *************** *************** *************** *************** *
***************
Description: An error occurred during the compilation of a resource
required to service this request. Please review the following specific error
details and modify your source code appropriately.

Compiler Error Message: BC30451: Name 'txtQuestion' is not declared.

Source Error:

Line 102: Dim positionID as Integer = Session("Positi onID")
Line 103:
Line 104:trace.warn( "txtQuestio n = " & txtQuestion.tex t)
*************** *************** *************** *************** *************** *
***************

Here is the asp code showing it as part of the EditItemTemplat e - so of
course it doesn't exist when the page is first displayed(last line shows
it):
*************** *************** *************** *************** *************** *
**************
<EditItemTempla te>
<table border="1" width="100%" CellPadding="0" CellSpacing="0"
style="margin:0 ">
<tr>
<td>
<asp:ImageButto n ID="ExpandButto n" runat="server" Font-Size="2"
ImageUrl="../images/expand.gif" Width="16" Height="16" CommandName="Se lect"
AlternateText=" Click here to see details"></asp:ImageButton >
</td>
<td>
<asp:ImageButto n ID="CollapseBut ton" visible="false"
runat="server" Font-Size="2" ImageUrl="../images/collapse.gif" Width="16"
Height="16" CommandName="Se lect" AlternateText=" Click here to see
details"></asp:ImageButton >
<asp:label id="PositionID " Visible="false" runat="server"
Text='<%# DataBinder.Eval (Container.Data Item, "PositionID ") %>' />
<asp:label id="QuestionUni que" Visible="false" runat="server"
Text='<%# DataBinder.Eval (Container.Data Item, "QuestionUnique ") %>' />
</td>
<td width="100%">

<asp:TextBox id="txtQuestion " columns="60" MaxLength="50"
runat="server" Text='<%# DataBinder.Eval (Container.Data Item, "Question") %>'
/>
*************** *************** *************** *************** *************** *
***************

Here is the trace.route showing it (I had to comment out the trace.warn
statement to get it):

*************** *************** *************** *************** *************** *
***********
DataList1System .Web.UI.WebCont rols.DataList52 83100
DataList1:_ctl0 System.Web.UI.W ebControls.Data ListItem9860
DataList1:_ctl0 :_ctl2System.We b.UI.LiteralCon trol1340
DataList1:_ctl0 :ExpandButtonSy stem.Web.UI.Web Controls.ImageB utton1620
DataList1:_ctl0 :_ctl3System.We b.UI.LiteralCon trol460
DataList1:_ctl0 :CollapseButton System.Web.UI.W ebControls.Imag eButton00
DataList1:_ctl0 :_ctl4System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :PositionIDSyst em.Web.UI.WebCo ntrols.Label032
DataList1:_ctl0 :_ctl5System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :QuestionUnique System.Web.UI.W ebControls.Labe l028
DataList1:_ctl0 :_ctl6System.We b.UI.LiteralCon trol590
---> DataList1:_ctl0 :txtQuestion
System.Web.UI.W ebControls.Text Box1650
DataList1:_ctl0 :_ctl7System.We b.UI.LiteralCon trol650
DataList1:_ctl0 :_ctl0System.We b.UI.WebControl s.Button670
DataList1:_ctl0 :_ctl8System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :_ctl1System.We b.UI.WebControl s.Button670
DataList1:_ctl0 :_ctl9System.We b.UI.LiteralCon trol1220
DataList1:_ctl0 :DataGrid1Syste m.Web.UI.WebCon trols.DataGrid0 136
DataList1:_ctl0 :_ctl10System.W eb.UI.LiteralCo ntrol600
DataList1:_ctl1 System.Web.UI.W ebControls.Data ListItem400
*************** *************** *************** *************** *************** *
*************

This does not show up on the first page (as we are not in edit mode yet),
but I am getting the error before the first page is executed. We do not go
into this subroutine except during editing mode - when the object would
exist.

Why would I get the error at this time and how do I get around this?

Thanks

Tom

Nov 19 '05 #2

tshad

"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:eT******** ******@tk2msftn gp13.phx.gbl...

Tom,
It's hard to be sure without more context, but it seems pretty clear that
infact txtQuestion DOES NOT exist. What does exist is
DataList1:_ctl0 :txtQuestion which is quite different. If you want to get
a
reference to txtQuestion, you need to do a FindControl("tx tQuestion")
within the edit template.

In other words, what you see as txtQuestion is a control embedded within
other controls (from what you've shown, that's a datalist containing an
editTemplate which contains a textbox). It therefore isnt simply
available
as "txtQuestio n". It only exists as "txtQuestio n" as far as the edit
template is concerned. So to get it, you need to do:

private Sub Edit_Command(se nder As Object, e As DataListCommand EventArgs)
...
dim txt as TextBox = ctype(e.Item.Fi ndControl("txtQ uestion"), TextBox)
...
end sub
That was it.

I keep forgetting that I need to get the control before I can use it.

Thanks,

Tom
Karl

P.S. - Option Strict is your friend in VB.Net
--
MY ASP.Net tutorials
http://www.openmymind.net/
"tshad" <ts**********@f tsolutions.com> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..
I am getting an error on a object name that doesn't exist (according to
asp.net), but if you look at the trace, it does.

Here is the error:

*************** *************** *************** *************** *************** *
***************
Description: An error occurred during the compilation of a resource
required to service this request. Please review the following specific
error
details and modify your source code appropriately.

Compiler Error Message: BC30451: Name 'txtQuestion' is not declared.

Source Error:

Line 102: Dim positionID as Integer = Session("Positi onID")
Line 103:
Line 104:trace.warn( "txtQuestio n = " & txtQuestion.tex t)
*************** *************** *************** *************** *************** *
***************

Here is the asp code showing it as part of the EditItemTemplat e - so of
course it doesn't exist when the page is first displayed(last line shows
it):
*************** *************** *************** *************** *************** *
**************
<EditItemTempla te>
<table border="1" width="100%" CellPadding="0" CellSpacing="0"
style="margin:0 ">
<tr>
<td>
<asp:ImageButto n ID="ExpandButto n" runat="server" Font-Size="2"
ImageUrl="../images/expand.gif" Width="16" Height="16"
CommandName="Se lect"
AlternateText=" Click here to see details"></asp:ImageButton >
</td>
<td>
<asp:ImageButto n ID="CollapseBut ton" visible="false"
runat="server" Font-Size="2" ImageUrl="../images/collapse.gif" Width="16"
Height="16" CommandName="Se lect" AlternateText=" Click here to see
details"></asp:ImageButton >
<asp:label id="PositionID " Visible="false" runat="server"
Text='<%# DataBinder.Eval (Container.Data Item, "PositionID ") %>' />
<asp:label id="QuestionUni que" Visible="false" runat="server"
Text='<%# DataBinder.Eval (Container.Data Item, "QuestionUnique ") %>' />
</td>
<td width="100%">

<asp:TextBox id="txtQuestion " columns="60" MaxLength="50"
runat="server" Text='<%# DataBinder.Eval (Container.Data Item, "Question")
%>'
/>
*************** *************** *************** *************** *************** *
***************

Here is the trace.route showing it (I had to comment out the trace.warn
statement to get it):

*************** *************** *************** *************** *************** *
***********
DataList1System .Web.UI.WebCont rols.DataList52 83100
DataList1:_ctl0 System.Web.UI.W ebControls.Data ListItem9860
DataList1:_ctl0 :_ctl2System.We b.UI.LiteralCon trol1340
DataList1:_ctl0 :ExpandButtonSy stem.Web.UI.Web Controls.ImageB utton1620
DataList1:_ctl0 :_ctl3System.We b.UI.LiteralCon trol460
DataList1:_ctl0 :CollapseButton System.Web.UI.W ebControls.Imag eButton00
DataList1:_ctl0 :_ctl4System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :PositionIDSyst em.Web.UI.WebCo ntrols.Label032
DataList1:_ctl0 :_ctl5System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :QuestionUnique System.Web.UI.W ebControls.Labe l028
DataList1:_ctl0 :_ctl6System.We b.UI.LiteralCon trol590
---> DataList1:_ctl0 :txtQuestion
System.Web.UI.W ebControls.Text Box1650
DataList1:_ctl0 :_ctl7System.We b.UI.LiteralCon trol650
DataList1:_ctl0 :_ctl0System.We b.UI.WebControl s.Button670
DataList1:_ctl0 :_ctl8System.We b.UI.LiteralCon trol130
DataList1:_ctl0 :_ctl1System.We b.UI.WebControl s.Button670
DataList1:_ctl0 :_ctl9System.We b.UI.LiteralCon trol1220
DataList1:_ctl0 :DataGrid1Syste m.Web.UI.WebCon trols.DataGrid0 136
DataList1:_ctl0 :_ctl10System.W eb.UI.LiteralCo ntrol600
DataList1:_ctl1 System.Web.UI.W ebControls.Data ListItem400
*************** *************** *************** *************** *************** *
*************

This does not show up on the first page (as we are not in edit mode yet),
but I am getting the error before the first page is executed. We do not
go
into this subroutine except during editing mode - when the object would
exist.

Why would I get the error at this time and how do I get around this?

Thanks

Tom

Nov 19 '05 #3

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