IMPORTANT --- Cant add record in database with linq to entity

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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

C#

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();

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

Posted 24-Oct-12 1:33am

nariman008

Updated 24-Oct-12 2:34am

ZurdoDev

v2

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Comments

Herman<T>.Instance 24-Oct-12 10:57am

where is the ndb.InsertOnSubmit()?

Rajesh Kariyavula 25-Oct-12 1:40am

Is this all your code for saving a record?

Saraniraj 25-Oct-12 2:54am

you can try addobject coding

ndb.AddToM_Info.AddObject(mn);
ndb.SaveChanges();

3 solutions

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Ambesha · Answer 1 · 2012-10-26T02:02:00

Solution 3

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

Posted 26-Oct-12 2:02am

Ambesha

Santossh · Answer 2 · 2012-10-26T01:42:00

Solution 1

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.

Posted 26-Oct-12 1:42am

Santossh

Satyendra Kumar(Analyst Programmer) · Answer 3 · 2012-11-01T11:31:00

Hi,

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

C#

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();
}