Hi,

In my grid, the first column is a checkbox column. 

The header checkbox is uses for select all /clear all

But when I change the cells checkbox or the grid lost the focus and then I try to check the header check box(the check box is unchecked)he always make un-check to all the check box in the column instead of checked the header check and all the column checkboxs.

I succeed to solve this when I add the following  code to the event BeforeHeaderCheckStateChanged:

if (e.NewCheckState == CheckState.Indeterminate)
{
e.NewCheckState = e.CurrentCheckState;

}

But at the first load, the checkbox column work OK but when I reload the grid with new bind I need to press twice on each checkbox to change the checkbox to check

how I can solve this issue?

Thanks

Nirit