摘要：
using System;using System.Collections.Generic;using System.ComponentModel;using System.Drawing;using System.Data;using System.Linq;using System.Text;using System.Windows.Forms;namespace WindowsFormsApplication1{ public partial class DrawLine : UserControl { public delegate void DrawChangeDataDelega. 阅读全文
摘要：
设置this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;即可 阅读全文