枚举的使用

public enum TimeOfDay
static void WriteGreeting(TimeOfDay timeOfDay)

private void Form1_Load(object sender, EventArgs e)

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
public enum OrderState
public static string GetOrderStateString(OrderState state)
[EnumDescription("订单、订单中的产品、产品项的状态。")]
public enum OrderStateEnum
comboBox1.DataSource = EnumDescription.GetFieldTexts(typeof(OrderStateEnum));
comboBox1.ValueMember = "EnumValue";
comboBox1.DisplayMember = "EnumDisplayText";
comboBox1.SelectedValue = (int)OrderStateEnum.Finished; //选中值