customvalidator problem in datagrid

[philipl]

hi,

i have a textbox in my edititemtemplate in my datagrid. I have created
a customvalidator for it, when i update the row the appropiate
function gets called to customvalidate but the problem is that the
error message in my customvalidator does not get printed in the
datagrid even though I have set the isvalid property in the server
function to false. Does anyone know why this is?

Here is the code snippets:

protected void cbLangCheck(object source, ServerValidateEventArgs
args)
{
if(insert_lang.Items.FindByText(args.Value) == null)
{
args.IsValid = false;
return;
}
else
{
args.IsValid = true;
return;
}

}

<asp:TemplateColumn HeaderStyle-CssClass="header"
HeaderText="External Ref">
<ItemTemplate>
<asp:Label runat="server" ID="extref"
Text='<%#DataBinder.Eval(Container.DataItem, "ExtRefKey")%>'/>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox CssClass="standard-text" ID="extrefentry"
Text='<%#tmsettings.ExtRef%>' runat="server" />
<asp:CustomValidator Runat="server"
EnableClientScript="False" ControlToValidate="extrefentry"
OnServerValidate="tbrefCheck" ErrorMessage="You must select language
from list" Display="Dynamic"></asp:CustomValidator>
</EditItemTemplate>
</asp:TemplateColumn>

 

[Peter Blum]

Hi PhilipL, I guess you xposted this on www.asp.net. Thanks for adding the
code.

The overall code looks good although I'd like to know if the server validate
method is actually called.

Here's what I think may be happening.
1. Your page is posted back.
2. The Page.Validate method runs (probably automatically in the Submit
button)
3. Now this method is called and it returns IsValid=false (as you prove with
a debugger)
4. You call DataBind() on the datagrid, forcing it to recreate the entire
grid's rows.

Its easy to clobber rows in a DataGrid...

--- Peter Blum
www.PeterBlum.com
Email: (e-mail address removed)
Creator of "Professional Validation And More" at
http://www.peterblum.com/vam/home.aspx

 

[philipl]

Hi PhilipL, I guess you xposted this on www.asp.net. Thanks for adding the
code.

The overall code looks good although I'd like to know if the server validate
method is actually called.

Here's what I think may be happening.
1. Your page is posted back.
2. The Page.Validate method runs (probably automatically in the Submit
button)
3. Now this method is called and it returns IsValid=false (as you prove with
a debugger)
4. You call DataBind() on the datagrid, forcing it to recreate the entire
grid's rows.

Its easy to clobber rows in a DataGrid...

Thanks Peter,

that actually pointed me to the right direction. Yeah, indeed right
after checking, it is going straight to the update event and rebinding
the entire datagrid. Now I just check for status of isvalid at in the
update event and prevent it from rebinding if necessary. It's hard to
get into a debugging mindset with .net, since everything is supposed
to be straight forward.

 

[Peter Blum]

I'm glad it worked.

You wrote: "It's hard to

get into a debugging mindset with .net, since everything is supposed
to be straight forward."

It think its usually pretty straightforward. But I come from years of OOP
experience. I live for classes to represent everything.

--- Peter Blum
www.PeterBlum.com
Email: (e-mail address removed)
Creator of "Professional Validation And More" at
http://www.peterblum.com/vam/home.aspx