DataGridViewColumn.ValueType Propriété
Définition
Important
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Obtient ou définit le type de données des valeurs stockées dans les cellules de la colonne.
public:
property Type ^ ValueType { Type ^ get(); void set(Type ^ value); };
[System.ComponentModel.Browsable(false)]
public Type ValueType { get; set; }
[<System.ComponentModel.Browsable(false)>]
member this.ValueType : Type with get, set
Public Property ValueType As Type
Valeur de propriété
Type qui décrit la classe d'exécution des valeurs stockées dans les cellules de la colonne.
- Attributs
Exemples
L’exemple de code suivant montre comment utiliser la ValueType propriété dans l’initialisation d’une DataGridViewComboBoxColumn valeur qui contient des Color valeurs.
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
Remarques
Cette propriété est utilisée lors du filtrage ou du tri des colonnes par rapport au contenu de leurs cellules.