DataGridViewEditingControlShowingEventArgs.Control Proprietà

Definizione

Controllo visualizzato all'utente per la modifica del valore della cella selezionata.The control shown to the user for editing the selected cell's value.

public:
 property System::Windows::Forms::Control ^ Control { System::Windows::Forms::Control ^ get(); };
public System.Windows.Forms.Control Control { get; }
member this.Control : System.Windows.Forms.Control
Public ReadOnly Property Control As Control

Valore della proprietà

Oggetto Control che visualizza un'area nella quale l'utente può immettere o modificare il valore della cella selezionata.A Control that displays an area for the user to enter or change the selected cell's value.

Esempi

Nell'esempio di codice riportato di seguito viene illustrato l'utilizzo di questa proprietà.The following code example illustrates the use of this property. Nell'esempio, un DataGridView.EditingControlShowing gestore eventi aggiunge un gestore per un DataGridViewComboBoxEditingControl evento.In the example, a DataGridView.EditingControlShowing event handler adds a handler for a DataGridViewComboBoxEditingControl event. Viene eseguito il cast del controllo di ComboBox modifica a un ComboBox.SelectedIndexChanged oggetto per gestire l'evento.The editing control is cast to a ComboBox to handle the ComboBox.SelectedIndexChanged event.

private DataGridView dataGridView1 = new DataGridView();

private void AddColorColumn()
{
    DataGridViewComboBoxColumn comboBoxColumn =
        new DataGridViewComboBoxColumn();
    comboBoxColumn.Items.AddRange(
        Color.Red, Color.Yellow, Color.Green, Color.Blue);
    comboBoxColumn.ValueType = typeof(Color);
    dataGridView1.Columns.Add(comboBoxColumn);
    dataGridView1.EditingControlShowing +=
        new DataGridViewEditingControlShowingEventHandler(
        dataGridView1_EditingControlShowing);
}

private void dataGridView1_EditingControlShowing(object sender,
    DataGridViewEditingControlShowingEventArgs e)
{
    ComboBox combo = e.Control as ComboBox;
    if (combo != null)
    {
        // Remove an existing event-handler, if present, to avoid 
        // adding multiple handlers when the editing control is reused.
        combo.SelectedIndexChanged -=
            new EventHandler(ComboBox_SelectedIndexChanged);

        // Add the event handler. 
        combo.SelectedIndexChanged +=
            new EventHandler(ComboBox_SelectedIndexChanged);
    }
}

private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
    ((ComboBox)sender).BackColor = (Color)((ComboBox)sender).SelectedItem;
}
Private WithEvents dataGridView1 As New DataGridView()

Private Sub AddColorColumn()

    Dim comboBoxColumn As New DataGridViewComboBoxColumn()
    comboBoxColumn.Items.AddRange( _
        Color.Red, Color.Yellow, Color.Green, Color.Blue)
    comboBoxColumn.ValueType = GetType(Color)
    dataGridView1.Columns.Add(comboBoxColumn)

End Sub

Private Sub dataGridView1_EditingControlShowing(ByVal sender As Object, _
    ByVal e As DataGridViewEditingControlShowingEventArgs) _
    Handles dataGridView1.EditingControlShowing

    Dim combo As ComboBox = CType(e.Control, ComboBox)
    If (combo IsNot Nothing) Then

        ' Remove an existing event-handler, if present, to avoid 
        ' adding multiple handlers when the editing control is reused.
        RemoveHandler combo.SelectedIndexChanged, _
            New EventHandler(AddressOf ComboBox_SelectedIndexChanged)

        ' Add the event handler. 
        AddHandler combo.SelectedIndexChanged, _
            New EventHandler(AddressOf ComboBox_SelectedIndexChanged)

    End If

End Sub

Private Sub ComboBox_SelectedIndexChanged( _
    ByVal sender As Object, ByVal e As EventArgs)

    Dim comboBox1 As ComboBox = CType(sender, ComboBox)
    comboBox1.BackColor = _
        CType(CType(sender, ComboBox).SelectedItem, Color)

End Sub

Commenti

Per personalizzare le caratteristiche di visualizzazione del controllo, impostare le proprietà dell'oggetto restituito dalla CellStyle proprietà anziché impostare le proprietà del controllo restituito Control dalla proprietà.To customize the display characteristics of the control, set the properties of the object returned by the CellStyle property rather than setting the properties of the control returned by the Control property.

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