Datagridview: Get SelectedIndex of DataGridViewComboBoxColumn

This seems to be a straight forward thing, but Microsoft only knows why this simple feature is not supported in DataGridView.

If you have a ComboBoxColumn in your DataGridView and you want to know what is the selected index of the combo box, then you need to do this:

1. Handle the EditingControlShowing event of DataGridView. In this event handler, check if the current column is of our interest. Then we create a temporary ComboBox object and get the selected index:

private void dataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
if (dataGridView1.CurrentCell.ColumnIndex == 0)
{
// Check box column
ComboBox comboBox = e.Control as ComboBox;
comboBox.SelectedIndexChanged += new EventHandler(comboBox_SelectedIndexChanged);
}
}

void comboBox_SelectedIndexChanged(object sender, EventArgs e)
{
int selectedIndex = ((ComboBox)sender).SelectedIndex;
MessageBox.Show("Selected Index = " + selectedIndex);
}

A rather round-about solution where a simple one would have sufficed.