Intercepting an exception inside IDisposable.Dispose

Question

In the IDisposable.Dispose method is there a way to figure out if an exception is being thrown?

using (MyWrapper wrapper = new MyWrapper())
{
           


        

Answer 1

Now, in 2017, this is the generic way to do it, incl handling rollback for exceptions.

    public static T WithinTransaction(this IDbConnection cnn, Func fn)
    {
        cnn.Open();
        using (var transaction = cnn.BeginTransaction())
        {
            try
            {
                T res = fn(transaction);
                transaction.Commit();
                return res;
            }
            catch (Exception)
            {
                transaction.Rollback();
                throw;
            }
            finally
            {
                cnn.Close();
            }
        }
    }

and you call it like this:

        cnn.WithinTransaction(
            transaction =>
            {
                var affected = ..sqlcalls..(cnn, ...,  transaction);
                return affected;
            });