Question

I have a Save() method that saved rows using a Linq2Sql DataContext.

    private void Save(object sender, EventArgs e)
    {
        Validate();
        selectNumUnitsByPidCdCostRevBindingSource.EndEdit();
        var db = new AccountingDataClassesDataContext(true);
        unitCountDataSet
            .GetChanges(DataRowState.Modified).Tables[0].Rows
            .Cast<EomApp1.Formss.Accounting.Data.UnitCountDataSet.SelectNumUnitsByPidCdCostRevRow>().ToList()
            .ForEach(row =>
            {
                db.Items.First(item => item.id == row.id).num_units = row.num_units;
            });
        db.SubmitChanges();
        Fill();
    }

This is the first time I’ve ever really wanted to ensure multiple updates occurred as a single batch (all or nothing) – and I’m just not sure if result of SubmitChanges() will be so.

If the answer is no, then what is the way to put this into a transaction?

Answer 1

The SubmitChanges() call will create a new transaction if one does not already exist, so yes these changes will be atomic.

Basically you’re in the third case as described in these docs:

http://msdn.microsoft.com/en-us/library/bb386995(v=vs.90).aspx