[Solved] RadGrid1_UpdateCommand and NullReferenceExceptions

[Inge Wandsvik]

Im having serious problems in my RadGrid1_UpdateCommand. I am using a RadGrid with a FormTemplate for editing values. In my FormTemplate I have a TextBox with id "txtValue". No matter what I do in my RadGrid1_UpdateCommand, I can not find this TextBox and get it's Text. I have tried TryCast and DirectCast, and I have tried the same way as I have been using in older RadGrids for ASP.Net (none Ajax), with no luck. I only get a NullReferenceException. I have also tried to define a string variable with the value "NewValue" just to test the code, but now I get an exception that say that IsInEditMode must be set to TRUE. How can I get the Text from my TextBox without exceptions, and how can I avoid getting an IsInEditMode must be set to True??? I have spent 2 days with this problem now, and the documentation of the RadGrid for Ajax doesnt say anything about how to use FormTemplate and RadGrid1_UpdateCommand.

[Vlad]

Hi Inge,

Generally controls in FormTemplate can be found using e.Item,FindControl() in UpdateCommand. Can you show us an example which illustrates the scenario at your end?

Sincerely yours,
Vlad
the Telerik team

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[Inge Wandsvik]

This is what I'm doing in the RadGrid1_UpdateCommand that throw a NullReferenceException:

Dim myTextBox As TextBox = CType(e.Item.FindControl("txtValue"), TextBox)
Dim myText As String = myTextBox.Text

myTextBox has value Nothing, so my next line throw the exception.
I have also tried the following, which give me an exception that say IsInEditMode must be set to True:
Dim myText As String = "MyValue"

[Vlad]

Hello Inge,

Please open a support ticket with an example where we can reproduce this. I will review your code and I will get back to you with more info.

Best wishes,
Vlad
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Shinu]

Hi,

Can you give a try with the followimg code snippet.

CS:

protected void RadGrid1_UpdateCommand(object source, GridCommandEventArgs e)
    {
      GridEditFormItem editedItem = (GridEditFormItem)e.Item;

      //Access the textbox from the edit form template and store the values in string variables.
        TextBox txtbx = (TextBox) editedItem.FindControl("txtValue");

       string strtxt= txtbx.Text.ToString();

   }

Thanks
Shinu.

[Inge Wandsvik]

Thanks Shinu, but your code didn't work well, so I had to modify it a little. Here is my modified code (e.item is GridDataItem and NOT GridEditFormItem,) 

Dim editedItem As GridDataItem = DirectCast(e.Item, GridDataItem)
Dim frmItem As GridEditFormItem = editedItem.EditFormItem
Dim txtbx As TextBox = DirectCast(frmItem.FindControl("txtValue"), TextBox)
Dim strtxt As String = txtbx.Text.ToString()

Now the code works, but no matter what I do I get an exception that say "Only items with IsInEditMode set to true can be updated". I have installed the latest version of the RadGrid for AJAX (2008.1.515.35) but still the same problem. I have even tried to remove all the code in the UpdateCommand section, and I still get the same error.This is driving me crazy...

[Princy]

Hi,

I have found the following forum links which discuss a similar error. Go through it and see whether it is helpful.

Only items with IsInEditMode set to true can be updated
RadGrid Cancel command
CommandName="UpdateEdited" does not work

Princy.

[Inge Wandsvik]

Thanks, Princy. I solved the problem now. This is the solution for me:. AllowAutomaticUpdates="False".