コンボボックス型セルのDropDownStyleプロパティにDropDownが設定されている状態でテキストを編集不可にするには？

文書番号 : 40632 文書種別 : 使用方法登録日 : 2017/07/26 最終更新日 : 2017/07/26

対象製品

MultiRow for Windows Forms 10.0J

詳細

ComboBoxEditingControlのKeyDownとKeyPressの各イベントでキー操作を無効にすることで、実質的なReadOnlyを実現することができます。

[Visual Basic]

Imports GrapeCity.Win.MultiRow

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim comboBoxCell1 As New ComboBoxCell()
    comboBoxCell1.Name = "comboBoxCell1"
    comboBoxCell1.DropDownStyle = MultiRowComboBoxStyle.DropDown
    comboBoxCell1.Items.AddRange(New String() {"AAA", "BBB", "CCC"})

    GcMultiRow1.Template = Template.CreateGridTemplate(New Cell() {comboBoxCell1})
    GcMultiRow1.RowCount = 5
End Sub

Private Sub GcMultiRow1_EditingControlShowing(ByVal sender As Object, ByVal e As EditingControlShowingEventArgs) Handles GcMultiRow1.EditingControlShowing
    ' コンボボックス型セルのイベント設定
    If TypeOf e.Control Is ComboBoxEditingControl Then
        RemoveHandler e.Control.KeyDown, AddressOf EditingControl_KeyDown
        AddHandler e.Control.KeyDown, AddressOf EditingControl_KeyDown
        RemoveHandler e.Control.KeyPress, AddressOf EditingControl_KeyPress
        AddHandler e.Control.KeyPress, AddressOf EditingControl_KeyPress
    End If
End Sub

Private Sub EditingControl_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs)
    ' コンボボックス型セルでDeleteキーを禁止する
    If e.KeyCode = Keys.Delete Then
        e.Handled = True
    End If
End Sub

Private Sub EditingControl_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
    ' コンボボックス型セルで文字入力を禁止する
    e.Handled = True
End Sub

[C#]

using GrapeCity.Win.MultiRow;

private void Form1_Load(object sender, EventArgs e)
{
    ComboBoxCell comboBoxCell1 = new ComboBoxCell();
    comboBoxCell1.Name = "comboBoxCell1";
    comboBoxCell1.DropDownStyle = MultiRowComboBoxStyle.DropDown;
    comboBoxCell1.Items.AddRange(new string[] { "AAA", "BBB", "CCC" });

    gcMultiRow1.Template = Template.CreateGridTemplate(new Cell[] { comboBoxCell1 });
    gcMultiRow1.RowCount = 5;

    gcMultiRow1.EditingControlShowing +=new EventHandler(gcMultiRow1_EditingControlShowing);
}

private void gcMultiRow1_EditingControlShowing(object sender, EditingControlShowingEventArgs e)
{
    // コンボボックス型セルのイベント設定
    if (e.Control is ComboBoxEditingControl)
    {
        e.Control.KeyDown -= new KeyEventHandler(EditingControl_KeyDown);
        e.Control.KeyDown += new KeyEventHandler(EditingControl_KeyDown);
        e.Control.KeyPress -= new KeyPressEventHandler(EditingControl_KeyPress);
        e.Control.KeyPress += new KeyPressEventHandler(EditingControl_KeyPress);
    }
}

private void EditingControl_KeyDown(object sender, KeyEventArgs e)
{
    // コンボボックス型セルでDeleteキーを禁止する
    if(e.KeyCode == Keys.Delete)
    {
        e.Handled = true;
    }
}

private void EditingControl_KeyPress(object sender, KeyPressEventArgs e)
{
    // コンボボックス型セルで文字入力を禁止する
    e.Handled = true;
}