Hi Kevin,

You need to set the propery called AllowNull to false in the DataGridBoolColumn to elimate the Tri-state of the checkbox.

Try calling the EndEdit method for the DataGrid to finish the editing.

>I have a datagrid that's bound to an ADO.NET data table.
>
>The table has two columns...a description and a boolean. The boolean column represents yes/no checkboxes. I also have an OK button on the form...when the user clicks OK, I scan through the datatable to see which rows the user 'checked'.
>
>The problem is that the tri-state nature of the checkbox [checked on, checked off, and the one in between where it's grey] is confusing to users. Also...if someone clicks a checkbox and then clicks OK, the update isn't truly 'made' to the datatable [it seems the edit is still pending in the grid].
>
>Has anyone else run into this? Any ideas to make this a little better?
>
>Thanks,
>Kevin