Question

I want to delete a row from gridview and database – I write some code but this code just delete the first row of my gridview!
Please help me. I used Entity Framework and wpf C#.

using (AccountingEntities cntx = new AccountingEntities())
{
   Producer item = this.grdProducers.SelectedItem as Producer;
   cntx.DeleteObject(cntx.Producers.First(x => x.ID == item.ID));
   cntx.SaveChanges();
   dataPager.Source = cntx.Producers.ToList();
}

Answer 1

I find the solution: when i open the dialog for confirming the delete action, selected item changed. i should select the entityId before opening the dialog. the below code show how to do this:

            int unitTypeId = (this.grdUnitTypes.SelectedItem as UnitType).ID;
            ConfirmWindowResult result = Helpers.ShowConfirm(this, SR.GlobalMessages.AreYouSureToDelete, SR.GlobalMessages.Warning);
            if (result == ConfirmWindowResult.Yes)
            {
                using (AccountingEntities cntx = new AccountingEntities())
                {
                    try
                    {
                        cntx.UnitTypes.DeleteObject(cntx.UnitTypes.First(x => x.ID == unitTypeId));
                        cntx.SaveChanges();
                        dataPager.Source = cntx.UnitTypes.ToList();
                        MessageBox.Show("Success");
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Error");
                    }
                    finally
                    {
                        cntx.Dispose();
                    }
                }
            }