Question

我正在使用linq从数据库中删除数据。我用Google搜索，并进行查询。我正在使用以下查询。

当我把调试器放在这上面时，它没有显示任何错误。它很好。但是当我检查我的数据库时，记录不会被删除。

同时进行插入操作：

 splitTradeDataContext db = new splitTradeDataContext();
                    tradeFile tlbTradeFile = new tradeFile();

 tlbTradeFile.TradeNo = TradeNo + "_A";
               tlbTradeFile.Status = Status;
               tlbTradeFile.Scrip_Code = Scrip_Code;
               tlbTradeFile.Inst_Type = Inst_Type;
               tlbTradeFile.Expirydate = Expirydate;
               tlbTradeFile.Strike_price = Strike_price;
               tlbTradeFile.Option_type = Option_type;
               tlbTradeFile.Sec_Name = Sec_Name;
               tlbTradeFile.BookType = BookType;
               tlbTradeFile.BookTypeName = BookTypeName;
               tlbTradeFile.TerminalId = TerminalId;
               tlbTradeFile.Branch_Id = Branch_Id;
               tlbTradeFile.Buy_Sell = Buy_Sell;
               tlbTradeFile.Trade_Qty = Trade_Qty;
               tlbTradeFile.Market_Rate = Market_Rate;
               tlbTradeFile.Pro_cli = Pro_cli;
               tlbTradeFile.Party_Code = Party_Code + "_A";
               tlbTradeFile.ParticipantCode = ParticipantCode;
               tlbTradeFile.O_C_Flag = O_C_Flag;
               tlbTradeFile.Sauda_Date = Sauda_Date;
               tlbTradeFile.TradeModified = TradeModified;
               tlbTradeFile.OrderNo = OrderNo;
               tlbTradeFile.Opp_Broker_Id = Opp_Broker_Id;
               tlbTradeFile.OrderTime = OrderTime;
               tlbTradeFile.UnknowkNum = UnknowkNum;

 var remove = from aremove in db.tradeFiles
              where aremove.ID==int.Parse(gvTradeFile.SelectedRows[0].Cells[0].Value.ToString())
              select aremove;
 if(remove!=null)
    db.tradeFiles.DeleteAllOnSubmit(remove);

有什么问题？我使用错误的查询吗？或者还有什么东西还留在我身边？

Answer 1

您不需要在代码中的任何位置调用SubmitChanges：

db.SubmitChanges(); //if its LINQ to SQL

删除查询不起作用

1 个答案: