在数据网格视图中更新数据时，组合框数据源绑定不显示文本

Question

I have bound a data grid view and a combo box to my table (which is managed by Entity Framework):

eraDataGridView.DataSource = BillContext.Eras.Local.ToBindingList();
eraComboBox.DataSource = BillContext.Eras.Local.ToBindingList();
eraComboBox.DisplayMember = "Name";

and I have created a save button for the data grid view:

private void saveEras_Click(object sender, EventArgs e) {
    BillContext.SaveChanges();
    saveEras.Enabled = false;
}

When I insert a new row to the data grid view; if I select another row after I finish editing the row (by clicking on another row, pressing tab or enter) and then click on the save button everything works as expected, but if I press the save button without changing the row; the combo box will have a new item without text(which is the new row but without the text).

How can I make the combo box show the text of the newly added row in the described scenario? Any workarounds would be appreciated.

Answer 1

implementing INotifyPropertyChanged in my DAO classes solves this problem. more info