public DataSet UserName(string struser) { DataSet list; UserModel model = new UserDal(); DB_OPT dbo = new DB_OPT(); try { dbo.Open(); model.UserPK = struser; list = model.GetList(" UserPK='" + model.UserPK + "'", dbo); } catch (Exception exception) { throw exception; } finally { dbo.Close(); } return list; }