[Solved] GridClientSelectColumn header checkbox resets

[Graham King]

Hi,

I'm trying to set the checkbox.checked for the checkbox in the header of the GridClientSelectColumn when AllowMultiRowSelection="true".

I'm using the following code:

	foreach (GridHeaderItem HeaderItem in costCentresGrid.MasterTableView.GetItems(GridItemType.Header))
	{
	//Find the SelectAll CheckBox in the header using the ClientSelectColumn's  "UniqueName"
	CheckBox chkSelectAll = (CheckBox)HeaderItem["CostCentreSelectColumn"].Controls[0];
	chkSelectAll.Checked = costCentresGrid.MasterTableView.Items.Count == costCentresGrid.SelectedItems.Count;
	}

The problem I'm having is that even before line 5 runs, the chkSelectAll.Checked is correctly set.  No matter what I set it to though the checkbox always clears when the ajax call (in which the above code runs) is ALWAYS set to false.

How can I keep the checkbox checked even when it is set to checked?

[Yavor]

Hi Graham,

Indeed, this behavior will be present since the behavior of the controls in the select columns of RadGrid is controlled via Js. Because of this, I would suggest that you employ a standard template column, with nested checkboxes, to allow for any custom logic that you may have.
I hope this is a suitable approach for you.

Greetings,
Yavor
the Telerik team

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