You can't click the ButtonEdit buttons when the view is not editable because the editors only drawn but not invoked in this case.
Set the gvPrompt.OptionsBehavior.Editable
property to true
. Then, set each column's (except the column with the ButtonEdit) GridColumn.OptionsColumn.AllowEdit
property to false
. It allows the column with the ButtonEdit to be editable and the editor's buttons to be "clickable".
Please also remove the this.gvPrompt.OptionsBehavior.EditorShowMode = DevExpress.Utils.EditorShowMode.Click;
line. It allows the button edit to react on mouse click immediatelly instead of focusing cell first.