With ViewStyle to Grid, is it possible to have the CheckBox column to have a CheckBoxTriState ???
CheckEditor checkEditor = new CheckEditor();checkEditor.ThreeState = true;column.Editor = checkEditor;
Note that the data type for the bound column must be able to support null values, because the editor returns a value of DbNull.Value when the CheckState is Indeterminate. The exception to this rule is when the bound data type is System.Windows.Forms.CheckState, in which case it returns CheckState.Indeterminate.