Can't Insert new record from WPF Datagrid via LINQ-to-SQL -

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OK, what I'm doing (I think) is rather simple

I have a LINQ-to-SQL data reference set and one of the users in the designer, in the designer, it shows the source as "dbo.Users" as "user". This access is public, and I can just access the database to get it properly and update.

The problem comes when I try to add a new record.

  1. I have AutoGenerateColumns set to set datagrid = "true"
  2. CanUserAddRows "correct"
  3. The RowEditEnding event is set to a method .

When I add a record (SubmitChanges ()) in the context of data, nothing happens. It just does not include I have checked local objects in breakpoint and all the signs are that it is actually there and it has a correct record that it should be added.

But wait, there's even more.

If I execute Users.InsertOnSubmit () and pass the currentItem of datagrid (user casted), it is telling me, but I think the record is actually inserted "is a unit That can not already exist "gives an error.

Does anyone have a clue?

(Fwiw, backend is SQL2K8 express)

Edit: The code that gives no exception, but does not add the record
Either:

< Pre> Private Zero UserGrid_RoedIndInding (Object Sender, DataGridRoEdit Anting Agreement E) {ctx.SubmitChanges (); }

and the code that gives an exception: 

  Private zero UserGrid_RowEditEnding (Object Sender, DataGridRowEditEndingEventArgs e) {ctx.Users.InsertOnSubmit (user E.Row.Item); Ctx.SubmitChanges (); }

The problem is that you are using the same data reference as if you were using Datagrid . Do not do this Create a new data reference for every small task they are cheap, which is cheaper than conversion tracking, which are collected using the same reference for an extended period.


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