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string ID = System.Convert.ToString(Request["ID"]);
DataSet ds = blluser.GetList("UserId='" + ID + "'");
modeluser.UserId = ID;
modeluser.UserGrade = this.cboUserGrade.SelectedValue;
modeluser.UserPoints = this.lblIntegral.Text.Trim(); //UserPoints是个int类型,提示错误:无法将类型“string”隐式转换为“int?”,怎么改呀