private void ddlUser()
        {
            DAL     mydal = new DAL(conn);
            DataSet ds    = new DataSet();

            ds = mydal.ExecuteProcedure("spGetUsers");
            DDLUsers.DataSource     = ds;
            DDLUsers.DataValueField = "UserID";
            DDLUsers.DataTextField  = "FullName";
            DDLUsers.DataBind();
        }
    public void LoadUsers()
    {
        DDLUsers.DataSource     = AdminService.UserService.Search();
        DDLUsers.DataTextField  = "UserName";
        DDLUsers.DataValueField = "ID";
        DDLUsers.DataBind();

        ListItem li = new ListItem();

        li.Text  = "==请选择==";
        li.Value = "";
        DDLUsers.Items.Insert(0, li);
    }