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Drawing issue when cells disabled

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GridView
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Nordy
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Nordy asked on 07 Feb 2008, 04:56 PM
I have the following code:

private void gridAttributes_RowFormatting(object sender, RowFormattingEventArgs e) 
        { 
            AttributeBase obj = e.RowElement.RowInfo.DataBoundItem as AttributeBase; 
            GridCellElement cell = null
 
            if (obj.DataType == "varchar"
                cell = e.RowElement.RowInfo.Cells[2].CellElement; 
            else if (obj.DataType == "bit"
                cell = e.RowElement.RowInfo.Cells[1].CellElement; 
 
            cell.Enabled = false
            cell.DrawFill = true
            cell.GradientStyle = Telerik.WinControls.GradientStyles.Solid; 
            cell.BackColor = SystemColors.ControlLightLight; 
        } 

It works fine on initially setting up which cells should be enabled or disabled, either cell 1 or cell 2 will be enabled, but not both.  The problem comes when I've got enough rows to cause a vertical scroll bar to appear.  As I scroll down, BOTH cells will be disabled.  Then as I scroll up and down, the problem works its way up the grid until all cells in columns 1 and 2 are disabled and grayed.

Any ideas?  Thanks.  Please let me know if you need more info.

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Jack
Telerik team
answered on 07 Feb 2008, 06:34 PM
Hi Jamie,

Thank you for asking this question.

When dealing with cells in RadGridView it is better to use the CellFormatting event. It is also a requirement to reset any changes to the cell's style when your condition is not applicable.

I updated slightly your code. Consider the following code snippet:

void rgv_CellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e) 
   GridCellElement cell = e.CellElement; 
   AttributeBase obj = cell.RowElement.RowInfo.DataBoundItem as AttributeBase; 
 
   if (obj.DataType == "varchar" && cell.ColumnIndex == 2 || 
       obj.DataType == "bit" && cell.ColumnIndex == 1) 
   { 
       cell.Enabled = false
       cell.DrawFill = true
       cell.GradientStyle = Telerik.WinControls.GradientStyles.Solid; 
       cell.BackColor = SystemColors.ControlLightLight; 
   } 
   else 
   { 
       cell.DrawFill = false
   } 

Hope this helps. Do not hesitate to contact us if you have other questions.

Greetings,
Jack
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Nordy
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answered on 07 Feb 2008, 06:49 PM
Thanks for the quick reply!  I went ahead and changed my code to use CellFormatting instead of RowFormatting as you suggested, and changed your code further by adding cell.Enabled = true to the else statement under cell.DrawFill = false.  Now that I see it, it makes sense.

Thanks again.
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