public int ifExist(int GameID) { try { var sqlstr = "select * from [QPAccountsDB].[dbo].[AccountsInfo] where GameID =" + GameID + ""; AccountsFacade aideUserFacade = new AccountsFacade(); DataSet ds = aideUserFacade.GetAccountInfoByGameID(sqlstr); if (ds.Tables[0].Rows.Count > 0) { return(int.Parse(ds.Tables[0].Rows[0]["UserID"].ToString())); } else { return(0); } } catch { return(0); } }