สอบถามการใช้ Combobox ใน Datagridview ถ้าเลือกจาก Combobox แล้วให้ทำคำสั่งที่เขียน หรือแสดงข้อความอีกช่องครับ

        private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            ComboBox combo = e.Control as ComboBox;
            if (combo != null)
            {
                combo.SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);
                combo.SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);
            }
        }
        private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            ComboBox cb = (ComboBox)sender;
            string item = cb.Text;
            if (item != null)
                MessageBox.Show(item);
        }

Private Sub dataGridView1_EditingControlShowing(sender As Object, e As DataGridViewEditingControlShowingEventArgs)
	Dim combo As ComboBox = TryCast(e.Control, ComboBox)
	If combo IsNot Nothing Then
		combo.SelectedIndexChanged -= New EventHandler(AddressOf ComboBox_SelectedIndexChanged)
		combo.SelectedIndexChanged += New EventHandler(AddressOf ComboBox_SelectedIndexChanged)
	End If
End Sub
Private Sub ComboBox_SelectedIndexChanged(sender As Object, e As EventArgs)
	Dim cb As ComboBox = DirectCast(sender, ComboBox)
	Dim item As String = cb.Text
	If item IsNot Nothing Then
		MessageBox.Show(item)
	End If
End Sub

Private Sub dataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As DataGridViewEditingControlShowingEventArgs)
        Dim combo As ComboBox = TryCast(e.Control, ComboBox)
        If combo IsNot Nothing Then
            combo.SelectedIndexChanged -= New EventHandler(AddressOf ComboBox_SelectedIndexChanged)
            combo.SelectedIndexChanged += New EventHandler(AddressOf ComboBox_SelectedIndexChanged)
        End If
    End Sub
    Private Sub ComboBox_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
        Dim cb As ComboBox = DirectCast(sender, ComboBox)
        Dim item As String = cb.Text
        If item IsNot Nothing Then
            MessageBox.Show(item)
        End If
    End Sub

Private Sub ComboBox_SelectionChangeCommitted(ByVal sender As Object, ByVal e As EventArgs)
        Dim cb As ComboBox = DirectCast(sender, ComboBox)
        Dim item As String = cb.Text
        MsgBox(item)
        If item IsNot Nothing Then
            Exit Sub
        Else
            Dim FrmFinStockSeach As New FrmFineStockShearch
            FrmFinStockSeach.ShowDialog()
        End If
    End Sub

    Private Sub DGV1_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DGV1.EditingControlShowing
        Dim Cbo As ComboBox = TryCast(e.Control, ComboBox)
        If Cbo IsNot Nothing Then
            RemoveHandler Cbo.SelectionChangeCommitted, New EventHandler(AddressOf ComboBox_SelectionChangeCommitted)
            AddHandler Cbo.SelectionChangeCommitted, New EventHandler(AddressOf ComboBox_SelectionChangeCommitted)
        End If
    End Sub