CODEWITHSUNDEEP
.netentity-framework
mistyayn
mistyayn

Reputation: 154

Entity Framework SaveChanges not updating db

Using sql server profiler I can see that the initial query for AnswerComment is going to the db but when I get to the ef.SaveChanges() nothing is getting to the db. I'm using sqlexpress 2008 R2.

using (TPRDEntities ef = new TPRDEntities())
{
    var ac = ef.AnswerComments.Where(a => a.AnswerCommentID == answercomment.AnswerCommentID).FirstOrDefault();

    if (ac == null)
    {
        ac = new AnswerComment();
        ac.AnswerID = answercomment.AnswerID;
        ac.DisplayText = answercomment.DisplayText;
        ac.InsertDate = answercomment.InsertDate;
        ac.InsertUser = "save test user";
        ef.SaveChanges();
    }
}

Upvotes: 4

Views: 3270

Answers (3)

Eric J.
Eric J.

Reputation: 150108

The new instance you create

ac = new AnswerComment();

is not known to EF. It is a brand-new object instance that EF has not seen before.

You will have to add it to ef.AnswerComments

ef.AnswerComments.Insert(ac);

Also, ensure that ChangeTracking is active for ef.

Upvotes: 6

tanathos
tanathos

Reputation: 5606

I think you miss to add the AnswerComment to the Context, you've to do:

ac = new AnswerComment();
ac.AnswerID = answercomment.AnswerID;
ac.DisplayText = answercomment.DisplayText;
ac.InsertDate = answercomment.InsertDate;
ac.InsertUser = "save test user";

ef.AnswerComments.Add(ac);
ef.SaveChanges();

Upvotes: 1

naspinski
naspinski

Reputation: 34687

You are never inserting the new item into the table:

ef.AnswerComments.Insert(ac);
ef.SaveChanges();

Upvotes: 0

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