摘自msdn，详见http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/c7a82a6a-763e-424b-84e0-496caa9cfb4d/
public partial class Form1 : Form
{
// Content item for the combo box
private class Item {
public string Name;
public int Value;
public Item(string name, int value) {
Name = name; Value = value;
}
public override string ToString() {
// Generates the text shown in the combo box return Name;
}
}
public Form1() {
InitializeComponent();
// Put some stuff in the combo box
comboBox1.Items.Add(new Item("Blue", 1));
comboBox1.Items.Add(new Item("Red", 2));
comboBox1.Items.Add(new Item("Nobugz", 666));
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) {
// Display the Value property
Item itm = (Item)comboBox1.SelectedItem;
Console.WriteLine("{0}, {1}", itm.Name, itm.Value);
}
}