重要-无法将带有linq的数据库中的记录添加到实体 [英] IMPORTANT --- Cant add record in database with linq to entity

问题描述

hi
我有一个非常重要的问题，我已经与linq合作了很多次，但是这次我遇到了一个问题，我无法在数据库中保存任何记录！
这是我的代码的一部分

hi
i have a really important question , i''ve worked with linq to entity many times but this time i confront with a problem that i cant save any record in database!!!!!!

THIS IS A PART OF MY CODE

DatabaseEntities ndb = new DatabaseEntities();
M_Info mn = new M_Info();
            mn.EDate = "m";
            mn.LDay = "s";
            mn.LHour = "s";
            mn.MType = "slkd";
            mn.SDate = "sajkc";
            mn.Who = 1;
           
            ndb.AddToM_Info(mn);
            ndb.SaveChanges();

但是没有记录可以保存！！！！即使它没有抛出任何异常，我也不知道现在该怎么办

but no record will save!!!!! even it didnt throw any exeption, i donno what to do now

推荐答案

使用断点并调试应用程序，请仔细观察是否实际将记录保存在db中?

http://msdn.microsoft.com/en-us/library/gg509017.aspx [ ^ ]


谢谢，
Ambesha

use the breakpoints and debug the application , watch carefully that actulally you save records in db or not?

http://msdn.microsoft.com/en-us/library/gg509017.aspx[^]


Thanks,
Ambesha

尝试按照RajKumar的建议在M_Info上使用AddObject方法

例如:ndb.M_Info.AddObject(mn);
ndb.SaveChanges();

还要检查M_Info表是否具有主键.

Try using AddObject method on M_Info as suggested by RajKumar

e.g : ndb.M_Info.AddObject(mn);
ndb.SaveChanges();

Also check if the M_Info table has a primary key.

请使用此代码可能会解决您的问题:-

Hi,

Please use this code may it will solve your problem:-

using(DatabaseEntities ndb = new DatabaseEntities())
{
M_Info mn = new M_Info()
           {
            mn.EDate = "m",
            mn.LDay = "s",
            mn.LHour = "s",
            mn.MType = "slkd",
            mn.SDate = "sajkc",
            mn.Who = 1,
           };
           
            ndb.AddToM_Info(mn);
            ndb.SaveChanges();
}

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