TransformedBitmap.BeginInit Méthode

Définition

Espace de noms:

System.Windows.Media.Imaging

Assembly:

PresentationCore.dll

Signale le début de l'initialisation de TransformedBitmap.

public:
 virtual void BeginInit();

public void BeginInit ();

abstract member BeginInit : unit -> unit
override this.BeginInit : unit -> unit

Public Sub BeginInit ()

Implémente

BeginInit()

Exceptions

InvalidOperationException

TransformedBitmap est actuellement initialisé. BeginInit() a déjà été appelée.

- ou -

Le TransformedBitmap a déjà été initialisé.

Exemples

L’exemple suivant montre comment initialiser un TransformedBitmap avec un ensemble de propriétés à l’aide des BeginInit méthodes et EndInit .

// Create the new BitmapSource that will be used to scale the size of the source.
TransformedBitmap myRotatedBitmapSource = new TransformedBitmap();

// BitmapSource objects like TransformedBitmap can only have their properties
// changed within a BeginInit/EndInit block.
myRotatedBitmapSource.BeginInit();

// Use the BitmapSource object defined above as the source for this BitmapSource.
// This creates a "chain" of BitmapSource objects which essentially inherit from each other.
myRotatedBitmapSource.Source = myBitmapImage;

// Flip the source 90 degrees.
myRotatedBitmapSource.Transform = new RotateTransform(90);
myRotatedBitmapSource.EndInit();

' Create the new BitmapSource that will be used to scale the size of the source.
Dim myRotatedBitmapSource As New TransformedBitmap()

' BitmapSource objects like TransformedBitmap can only have their properties
' changed within a BeginInit/EndInit block.
myRotatedBitmapSource.BeginInit()

' Use the BitmapSource object defined above as the source for this BitmapSource.
' This creates a "chain" of BitmapSource objects which essentially inherit from each other.
myRotatedBitmapSource.Source = myBitmapImage

' Flip the source 90 degrees.
myRotatedBitmapSource.Transform = New RotateTransform(90)
myRotatedBitmapSource.EndInit()

Remarques

L’initialisation de propriété doit être effectuée entre BeginInit les appels et .EndInit Une fois que le TransformedBitmap a été initialisé, les modifications de propriété sont ignorées.

Voir aussi

• EndInit()
• ISupportInitialize