using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication3 {
    public partial class Form2 : Form     {
    public Form2()         {
                InitializeComponent(); this.comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;         }         [Flags]         [Serializable] enum Kind         {
                现金支付 = 0x0001,             银行支付 = 0x0002,         } private void Form2_Load(object sender, EventArgs e)         {
                var items = new System.Collections.ArrayList(Enum.GetValues(typeof(Kind))).ToArray(); //Items     加载 默认选择为空 //DataSource 加载 默认选择为首项             this.comboBox1.Items.Clear(); this.comboBox1.Items.AddRange(items); //this.comboBox1.DataSource = items;         } private void button1_Click(object sender, EventArgs e)         {
    if (this.comboBox1.SelectedItem != null)             {
                    var item = (Kind)this.comboBox1.SelectedItem; int value = item.GetHashCode(); //value = 1             } //设置 combobox 的值 //Items DataSource 都适用             this.comboBox1.SelectedItem = Kind.银行支付;         }     } }