customvalidator problem

bill yeager

I'm using the customvalidator in my web page. I get the
following error when I try to run the web page:

Unable to find control id 'lstRider' referenced by
the 'ControlToValid ate' property of 'cvRiders'.
Description: An unhandled exception occurred during the
execution of the current web request. Please review the
stack trace for more information about the error and where
it originated in the code.

Exception Details: System.Web.Http Exception: Unable to
find control id 'lstRider' referenced by
the 'ControlToValid ate' property of 'cvRiders'
Here is part of my HTML that is of concern:
<asp:TemplateCo lumn HeaderText="Rid ers">

<ItemTemplate >

<asp:listbox AutoPostBack="F alse"
BackColor="#fff fff" id="lstRider" runat="server" Rows="1"
DataSource="<%# DsRider1 %>" Enabled="True"
SelectionMode=" Multiple" DataTextField=" UserName"
DataValueField= "UserID" />

</asp:listbox>

</ItemTemplate>

</asp:TemplateCol umn>
</asp:datagrid><a sp:customvalida tor id="cvRiders" style="Z-
INDEX: 104; LEFT: 136px; POSITION: absolute; TOP: 88px"
runat="server"
display="Static "
OnServerValidat e="lstRiderVali dation" ErrorMessage="R iders
has a maximum selection of 2"
ControlToValida te="lstRider"> </asp:customvalid ator>
This is what I have in my code-behind:

Sub lstRiderValidat ion(ByVal source As Object, ByVal
arguments As ServerValidateE ventArgs) Handles
cvRiders.Server Validate

Dim strSelectionArr ay() As String =
arguments.Value .Split(",")

If strSelectionArr ay(2).Length > 0 Then 'Max 2
selections
arguments.IsVal id = False
Else
arguments.IsVal id = True
End If

End Sub

How can I get the customvalidator to recognize my control?
I know it's probably because the control is an
itemtemplate...

Nov 17 '05 #1

Subscribe Reply

2014

Marina

The ControlToValida te property is not required for custom validators. Leave
it blank.

"bill yeager" <ws********@msn .com> wrote in message
news:0d******** *************** *****@phx.gbl.. .

I'm using the customvalidator in my web page. I get the
following error when I try to run the web page:

Unable to find control id 'lstRider' referenced by
the 'ControlToValid ate' property of 'cvRiders'.
Description: An unhandled exception occurred during the
execution of the current web request. Please review the
stack trace for more information about the error and where
it originated in the code.

Exception Details: System.Web.Http Exception: Unable to
find control id 'lstRider' referenced by
the 'ControlToValid ate' property of 'cvRiders'
Here is part of my HTML that is of concern:
<asp:TemplateCo lumn HeaderText="Rid ers">

<ItemTemplate >

<asp:listbox AutoPostBack="F alse"
BackColor="#fff fff" id="lstRider" runat="server" Rows="1"
DataSource="<%# DsRider1 %>" Enabled="True"
SelectionMode=" Multiple" DataTextField=" UserName"
DataValueField= "UserID" />

</asp:listbox>

</ItemTemplate>

</asp:TemplateCol umn>
</asp:datagrid><a sp:customvalida tor id="cvRiders" style="Z-
INDEX: 104; LEFT: 136px; POSITION: absolute; TOP: 88px"
runat="server"
display="Static "
OnServerValidat e="lstRiderVali dation" ErrorMessage="R iders
has a maximum selection of 2"
ControlToValida te="lstRider"> </asp:customvalid ator>
This is what I have in my code-behind:

Sub lstRiderValidat ion(ByVal source As Object, ByVal
arguments As ServerValidateE ventArgs) Handles
cvRiders.Server Validate

Dim strSelectionArr ay() As String =
arguments.Value .Split(",")

If strSelectionArr ay(2).Length > 0 Then 'Max 2
selections
arguments.IsVal id = False
Else
arguments.IsVal id = True
End If

End Sub

How can I get the customvalidator to recognize my control?
I know it's probably because the control is an
itemtemplate...

Nov 17 '05 #2

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