RadGrid with ServerValidate - obtaining DataKeyValue - problem when add new row

[Darrell]

Hi, I'm using the following code to get the DataKeyValue of the edited row in the ServerValidate function. This is working well when editing a record. However, when creating a new record, item.GetDataKeyValue("ID") throws an argument out of range exception. Is there a way that I can test whether a DataKeyValue exists before making this call? Thanks.

protected void URLGrid_ServerValidate(object source, System.Web.UI.WebControls.ServerValidateEventArgs args)
   {
       CustomValidator val = (CustomValidator)source;
       GridDataItem item = (GridDataItem)val.NamingContainer;
          intwebsiteID = int.Parse(item.GetDataKeyValue("ID").ToString());
       if(!Website.URLIsUnique(websiteID, args.Value.Trim()))
       {
           args.IsValid = false;
       }
   }

[Konstantin Dikov]

Hello Darrell,

The easiest way for handling this would be to retrieve the DataKeyValue only when the GridDataItem is not GridDataInsertItem (or GridEditFormInsertItem if you are using EditForms as edit mode):

CustomValidator val = (CustomValidator)source;
GridDataItem item = (GridDataItem)val.NamingContainer;
if (!(item is GridDataInsertItem))
{
    intwebsiteID = int.Parse(item.GetDataKeyValue("ID").ToString());
    if (!Website.URLIsUnique(websiteID, args.Value.Trim()))
    {
        args.IsValid = false;
    }
}

You could also wrap the line where you are trying to retrieve the DataKeyValue within a Try/Catch.

Hope this helps.
 

Regards,
Konstantin Dikov
Telerik

 

 

[Darrell]

Thanks, Konstantin - if (!(item is GridDataInsertItem)) did the trick.
I prefer avoiding try catch where possible
Cheers
Darrell