or

protected override void SetupFilterControls(TableCell cell){ base.SetupFilterControls(cell); cell.Controls.RemoveAt(0); RadComboBox combo = new RadComboBox(); combo.ID = ("RadComboBox1" + this.UniqueName); combo.ShowToggleImage = false; //combo.Skin = "Office2007"; combo.EnableLoadOnDemand = true; combo.AutoPostBack = true; combo.MarkFirstMatch = true; combo.Height = Unit.Pixel(100); combo.ItemsRequested += this.list_ItemsRequested; combo.SelectedIndexChanged += this.list_SelectedIndexChanged; cell.Controls.AddAt(0, combo); ImageButton button = new ImageButton(); button.ImageUrl = "~/images/delete.gif"; button.Click += this.button_Click; button.CssClass = "ClearButton"; cell.Controls.AddAt(1, button); cell.Controls.RemoveAt(2);}