public void Delete(OrderHeaderViewModel viewModel)
{
if (viewModel == null)
{
throw new ArgumentNullException(nameof(viewModel));
}
this.OrderHeaders.Remove(viewModel);
this.DataProvider.Delete(viewModel.OrderHeader);
this.DisplayData();
}
public void Add(OrderHeaderViewModel viewModel)
{
if (viewModel == null)
{
throw new ArgumentNullException(nameof(viewModel));
}
this.OrderHeaders.Add(viewModel);
this.DataProvider.Insert(viewModel.OrderHeader);
this.DisplayData();
}