/// <summary>
/// 判断会员名是否已存在
/// </summary>
/// <param name="source"></param>
/// <param name="args"></param>
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
B_User bll = new B_User();
string userName = this.tbUserName.Text;
if (bll.IsExit(userName))
{
args.IsValid = false;
this.CustomValidator1.Visible = true;
this.tbUserName.Text = "";
}
else
{
args.IsValid = true;
}
}