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Can't clear grid when focus is on a child element

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GridView
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Jeremy Murtishaw
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Jeremy Murtishaw asked on 16 Jun 2009, 07:45 PM

Hi,
I'm trying to use a button to clear the results in my grid (see example below) and it works fine except for when I have focus on a child element of an expanded row.  If the focus is on any row that isn't a child then the clear button works without issue.  The error is "Object reference not set to an instance of an object."  for grdResults.DataSource.  where grdResults is the Telerik.WinControls.UI.RadGridView

private void cmdClear_Click(object sender, EventArgs e)
        {
             grdResults.DataSource = null;
        }

If the focus is on a child element when the clear button is clicked do I need to change focus to a non-child row and then set the DataSource to null?

Thanks,
Jeremy

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Victor
Telerik team
answered on 17 Jun 2009, 12:29 PM
Hello Jeremy Murtishaw,

Thank you for reporting this issue. This is a bug in RadGridView and has been scheduled for fixing. Again thank you for the feedback.Your Telerik points have been updated.

Regards,
Victor
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Jeremy Murtishaw
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answered on 17 Jun 2009, 02:55 PM

Thanks for your response Victor.  Until this is fixed, do you have any suggested workarounds?


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Prad
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answered on 17 Jun 2009, 04:48 PM
WorkAround:

Set radgridview.columns.clear();
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Jeremy Murtishaw
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answered on 17 Jun 2009, 05:03 PM
Thanks Pradeep! 

Using radgrdview.columns.clear() worked well except it still left a blank column header across the top of my grid, so in order to completely clear it I ended up doing the following:

            try
            {
                radgrdview..DataSource = null;
            }
            catch (NullReferenceException)
            {
                radgrdview.Columns.Clear();
            }
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Jeremy Murtishaw
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Victor
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Jeremy Murtishaw
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Prad
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