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PropertyMap.Item[String] Propriété

Définition

Obtient ou définit le délégué PropertyTranslator pour la propriété donnée.

public:
 property System::Windows::Forms::Integration::PropertyTranslator ^ default[System::String ^] { System::Windows::Forms::Integration::PropertyTranslator ^ get(System::String ^ propertyName); void set(System::String ^ propertyName, System::Windows::Forms::Integration::PropertyTranslator ^ value); };
public System.Windows.Forms.Integration.PropertyTranslator this[string propertyName] { get; set; }
member this.Item(string) : System.Windows.Forms.Integration.PropertyTranslator with get, set
Default Public Property Item(propertyName As String) As PropertyTranslator

Paramètres

propertyName
String

Nom de la propriété à mapper.

Valeur de propriété

PropertyTranslator

Délégué PropertyTranslator correspondant à la propriété spécifiée par propertyName.

Exceptions

propertyName a la valeur null ou est une chaîne vide ; le délégué PropertyTranslator spécifié a la valeur null.

La propriété donnée par propertyName n’existe pas sur SourceObject.

Exemples

L’exemple de code suivant montre comment récupérer le PropertyTranslator délégué pour la BackColor propriété d’un ElementHost contrôle.

// The ExtendBackColorMapping method adds a property
// translator if a mapping already exists.
private void ExtendBackColorMapping()
{
    if (elemHost.PropertyMap["BackColor"] != null)
    {
        elemHost.PropertyMap["BackColor"] += 
            new PropertyTranslator(OnBackColorChange);
    }
}

// The OnBackColorChange method assigns a specific image 
// to the hosted element's Background property.
private void OnBackColorChange(object h, String propertyName, object value)
{
    ElementHost host = h as ElementHost;
    System.Windows.Controls.Button wpfButton = 
        host.Child as System.Windows.Controls.Button;

    ImageBrush b = new ImageBrush(new BitmapImage(
        new Uri(@"file:///C:\WINDOWS\Santa Fe Stucco.bmp")));
    wpfButton.Background = b;
}
' The ExtendBackColorMapping method adds a property
' translator if a mapping already exists.
Private Sub ExtendBackColorMapping()

    If elemHost.PropertyMap("BackColor") IsNot Nothing Then

        elemHost.PropertyMap("BackColor") = PropertyTranslator.Combine( _
            elemHost.PropertyMap("BackColor"), _
            PropertyTranslator.CreateDelegate( _
            GetType(PropertyTranslator), _
            Me, _
            "OnBackColorChange"))
    End If

End Sub


' The OnBackColorChange method assigns a specific image 
' to the hosted element's Background property.
Private Sub OnBackColorChange( _
ByVal h As Object, _
ByVal propertyName As String, _
ByVal value As Object)

    Dim host As ElementHost = h
    Dim wpfButton As System.Windows.Controls.Button = host.Child
    Dim b As New ImageBrush(New BitmapImage( _
        New Uri("file:///C:\WINDOWS\Santa Fe Stucco.bmp")))
    wpfButton.Background = b

End Sub

L’exemple de code suivant montre comment récupérer le PropertyTranslator délégué pour la Background propriété d’un WindowsFormsHost contrôle.

// The ExtendBackgroundMapping method adds a property
// translator if a mapping already exists.
private void ExtendBackgroundMapping()
{
    if (wfHost.PropertyMap["Background"] != null)
    {
        wfHost.PropertyMap["Background"] += new PropertyTranslator(OnBackgroundChange);
    }
}

// The OnBackgroundChange method assigns a specific image 
// to the hosted control's BackgroundImage property.
private void OnBackgroundChange(object h, String propertyName, object value)
{
    WindowsFormsHost host = h as WindowsFormsHost;
    System.Windows.Forms.CheckBox cb = host.Child as System.Windows.Forms.CheckBox;
    ImageBrush b = value as ImageBrush;

    if (b != null)
    {
        cb.BackgroundImage = new System.Drawing.Bitmap(@"C:\WINDOWS\Santa Fe Stucco.bmp");
    }
}
' The ExtendBackgroundMapping method adds a property
' translator if a mapping already exists.
Private Sub ExtendBackgroundMapping() 
    If wfHost.PropertyMap("Background") IsNot Nothing Then

        wfHost.PropertyMap("Background") = PropertyTranslator.Combine( _
        wfHost.PropertyMap("Background"), _
        PropertyTranslator.CreateDelegate( _
            GetType(PropertyTranslator), _
            Me, _
            "OnBackgroundChange"))
    End If

End Sub


' The OnBackgroundChange method assigns a specific image 
' to the hosted control's BackgroundImage property.
Private Sub OnBackgroundChange(ByVal h As Object, ByVal propertyName As String, ByVal value As Object) 
    Dim host As WindowsFormsHost = h 
    Dim cb As System.Windows.Forms.CheckBox = host.Child 
    Dim b As ImageBrush = value 
    
    If Not (b Is Nothing) Then
        cb.BackgroundImage = New System.Drawing.Bitmap("C:\WINDOWS\Santa Fe Stucco.bmp")
    End If

End Sub

Remarques

Lors de la définition, s’il n’existe pas PropertyTranslator pour propertyName, le nouveau délégué est ajouté au PropertyMap. PropertyTranslator S’il existe déjà pour propertyName, il est remplacé.

S’applique à

Voir aussi