Changing ListBox selection is not moving changes from BindingSource to DataSet.

Question

The answer to this question may turn out to be, "Don't use typed DataSets without using the Binding Navigator." I am curious, however, about the behavior I'm seeing.

So, I created a form where every control was dragged from the data sources explorer. I deleted the Binding Navigator because it is ugly and inappropriate for this particular form. I added a ListBox and set the DataSource to the BindingSource.
Notice that the ListBox is not bound, it is just filling itself from the BindingSource. By some magic that I wasn't counting on, moving around in the ListBox is navigating the BindingSource and all other controls are updating accordingly.

I can make changes to the bound controls and explicitly call EndEdit on the BindingSource and then update the DataSource through the Table Adapter. Works great.

When I make changes in the bound controls and click a new option in the ListBox, I want to be able to check for changes and prompt to save or reset if there are any.

Here is the strange part that I haven't been able to figure out.

No matter what event I attach to, DataSet.HasChanges doesn't return true until the second ListBox change. I've searched and tried dozens of suggestions, most of them ridiculous, but a few that seemed promising. No luck.

Edit: It isn't the second click that is significant, it is when you click back on the original (edited) item.

Answer 1

Since asking the question, I've learned a bit more about BindingSources, DataSets and TableAdapters.

Here is what works:

    private void MyListBox_Click(object sender, EventArgs e)
    {
        this.myBindingSource.EndEdit();
        if (myDataSet.HasChanges())
        {
            if (MessageBox.Show("Save changes?", "Before moving on", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                myTableAdapter.Update(myDataSet.myDataTable);
            }
            else
            {
                myDataSet.RejectChanges();
            }
        }
    }