LINQ to SQL - No Add method available

问题:

I have created a LINQ to SQL datacontext with a single datatable in it. I am trying to simply insert a new record into that table. The problem I am coming across is LINQ is not offering an Add method to pass in the new record to. I have seen countless examples where there is an Add method, but I can't seem to get it. Am I completely missing something or is it something else?

using (praetoriaTestDataContext db = new praetoriaTestDataContext())
{
    PageHit hit = new PageHit();
    hit.DateViewed = DateTime.Now;
    hit.Page = "test";

    db.PageHits.Add(hit); //Add method is not available!
    db.SubmitChanges();
}

Thanks!

回答1:

Table's Add and Remove methods have been renamed to InsertOnSubmit and DeleteOnSubmit.

db.PageHits.InsertOnSubmit(hit);

回答2:

With LINQ-to-SQL, you want PageHits.InsertOnSubmit

回答3:

I had a similar issue, but InsertOnSubmit was not appearing either. It turned out that I was missing a reference to the System.Data.LINQ Assembly.