DataGridViewで新規行のセルの初期値を設定する方法

DataGridViewで新規行のセルの初期値を設定する方法
VB.NET

Private Sub dgv1_DefaultValuesNeeded(ByVal sender As Object, _
        ByVal e As DataGridViewRowEventArgs) _
        Handles dgv1.DefaultValuesNeeded
    e.Row.Cells("col1").Value = 0
    e.Row.Cells("col2").Value = "-"
End Sub

C#

private void dgv1_DefaultValuesNeeded(object sender,
    DataGridViewRowEventArgs e)
{
    e.Row.Cells["col1"].Value = 0;
    e.Row.Cells["col2"].Value = "-";
}