Master/Detail relation where Detail is a TextBox

I have a master detail relationship where the master is displayed in a Datagridview and the detail in a multiline TextBox.

The data binding is set up with the foreign key relation as a Datasource for the Bindingsource for the detail, so it updates when you scroll trough the master table.

When a row is added in the master table, a row is not automatically inserted for the detail table.

I created a little example with the pubs sample database, where the publisher table is the master and the pub_info is the detail. When the Textbox is entered, I create the row myself and add it to the dataset like in the following example.

private void pr_infoTextBox_Enter(object sender, EventArgs e)

{

if (pub_infoBindingSource.Count == 0)

{

pubsDataSet.pub_infoRow row = pubsDataSet.pub_info.Newpub_infoRow();

row.pub_id = ((publishersBindingSource.Current as DataRowView).Row as pubsDataSet.publishersRow).pub_id;

row.logo = null;

pubsDataSet.pub_info.Addpub_infoRow(row);

pub_infoBindingSource.Position = pubsDataSet.pub_info.Rows.IndexOf(row);

}

}