string columname = "COLUMNİSMİ";

urunler.Columns.Add(columname, typeof(string));

gridControl1.DataSource = urunler;

buttonEkle(columname);

 public void buttonEkle(string columnName)

 {

     GridView gridView = gridControl1.MainView as GridView;

     RepositoryItemButtonEdit repositoryButton = new RepositoryItemButtonEdit();

     repositoryButton.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.HideTextEditor;

     repositoryButton.Buttons[0].Caption = columnName;

     repositoryButton.Buttons[0].Kind = DevExpress.XtraEditors.Controls.ButtonPredefines.Glyph;

     repositoryButton.ButtonClick += RepositoryButton_ButtonClick;

     gridView.Columns[columnName].ColumnEdit = repositoryButton;

 }

 private void RepositoryButton_ButtonClick(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e)

 {

     ayrintiAc();

 }