zyip

摘要： usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Web;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Runtime.InteropServices;//必要引用usingSystem.Security.Principal;//必要引用publicpartialclasstrad_in_user_login:System.Web.UI.Page{protectedvoidPage_Load(objectsender,Ev 阅读全文

摘要： 触发器可能会导致ef无法正常工作，产生下面的错误：此时修改触发器为：CREATETRIGGER[dbo].[CreateTradeOrdNo]ON[dbo].[trade_Order]forINSERT--,update,deleteASBEGINselect*frominserted--加上这一句ENDThe member with identity '' does not exist in the member collection.Parameter name: identityDescription: An unhandled exception occurred du 阅读全文