C# 委托delegate 例子

private delegate void ShowStatusMessage(string vinfo);//代理
private void SetLabelMesssage(string vinfo)
{
//判断是否有其它线程调用控件
if (this.InvokeRequired)
{
ShowStatusMessage setpos = new ShowStatusMessage(SetLabelMesssage);
this.Invoke(setpos, new object[] { vinfo });
}
else
{
lblExpress.Text = vinfo;
if (NowCount == ExpressCount)
{
lblExpress.Text = "";
DevExpress.XtraEditors.XtraMessageBox.Show(string.Format("预约结束! 成功数{0}笔，失败数{1}!", sCount, dCount), AppMessage.MSG0000);
GetDataSale();
}
}
}