รบกวนหน่อยครับ Select row DataGridView ติดปัญาครับผม

For i as short = 0 To Me.dgvExrate.Rows.Count - 2
            If Me.txtrate.Text = Me.dgvExrate.Rows(i).Cells(0).Value Then
                dgvExrate.Rows(dgvExrate.Rows(i).Index).Selected = True
                dgvExrate.CurrentCell = dgvExrate.Rows(dgvExrate.Rows(i).Index).Cells(0)
                dgvExrate.BeginEdit(True)
                exit for
            End If
Next