Custom Validator fires, but does not stop update

[Jeff Mikla]

Hi,

I have a required field validator and a custom validator tied to an asp:textbox within a RadGrid.  The required field validator fires and displays my error message when the textbox is empty.  The custom validator fires its OnServerValidate call, my code checks the text length and sets the args.IsValid = false if the text is too large.

But the Update continues to proceed and tries to update the database with some text that is too large for the database field.
The custom validator error message never displays.

What am I missing?

 

<EditItemTemplate>

 

 

 

    <asp:TextBox ID="txbDescription" Style="width: 390px; margin-left: 4px;" runat="server"

 

 

        TextMode="MultiLine" Rows="3" Text='<%# Bind("Description") %>' MaxLength="1000" Wrap="true" />

 

 

 

    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="txbDescription"

 

 

        ErrorMessage="A Document description is required" Enabled="true" runat="server">

 

 

    </asp:RequiredFieldValidator>

 

 

    <asp:CustomValidator ID="val_txbDescription" Enabled="true" runat="server"

 

 

        ErrorMessage="Description is too large. Please limit text to 1000 characters."

 

 

        OnServerValidate="val_txbDescription_ServerValidate" Display="Dynamic" ControlToValidate="txbDescription">

 

 

    </asp:CustomValidator>

 

 

 

</EditItemTemplate>

 

 

 

 

protected

 

void val_txbDescription_ServerValidate(object source, ServerValidateEventArgs args)

 

{

args.IsValid =

true;

 

 

if (args.Value.Length > 1000) args.IsValid = false;

 

}

 

[Princy]

Hi,

You need to cancel the update process based on whether the page is valid or not  after performing the custom validation as shown below:

private void RadGrid1_ItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
{
  if(e.CommandName == RadGrid.UpdateCommandName)
  {
   if(!Page.IsValid)
   {
    e.Canceled = true;
   }
  }
}

Could you make sure that you have done the same.

Thanks,
Princy

[Jeff Mikla]

Thanks, that did the trick.

[Stacy]

Ignore my message, I was using a formview

[Gary]

Princy,
I just came across this post as I was having the same issue. When I add the check for Page.IsValid(), it does stop the update, but when the page posts back, the validator error messages are no longer displayed. 

What am I doing wrong here?

[Princy]

Hi Gary,

I was not able to replicate such an issue at my end. Please try to replicate it in this demo on Flexible Server-Side Validation.
If this doesn't help, please provide your code snippet.

Thanks,
Princy