使用方法
//如果Type是Buttonif (sender.GetType().Name.Equals("Button")){ Button btn = (Button)sender; switch (btn.Name) { case "btn_0": case "btn_1": case "btn_2": case "btn_3": case "btn_4": case "btn_5": case "btn_6": case "btn_7": case "btn_8": case "btn_9": if (InputValue.Length >= 20) break; checkClear(); InputValue += btn.Text; break; ... }}//如果Type是PictureBoxelse{ this.Visible = false;}