TransformedBitmap.BeginInit Metoda

Definice

Obor názvů:

System.Windows.Media.Imaging

Sestavení:

PresentationCore.dll

Signalizuje začátek TransformedBitmap inicializace.

public:
 virtual void BeginInit();

public void BeginInit ();

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

Public Sub BeginInit ()

Implementuje

BeginInit()

Výjimky

InvalidOperationException

Právě TransformedBitmap probíhá inicializace. BeginInit() již byla volána.

-nebo-

Soubor TransformedBitmap již byl inicializován.

Příklady

Následující příklad ukazuje, jak inicializovat TransformedBitmap se sadou vlastností pomocí BeginInit metod a 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()

Poznámky

Inicializace vlastnosti musí být provedena mezi BeginInit voláními a EndInit . TransformedBitmap Po inicializaci se změny vlastností ignorují.

Viz také

• EndInit()
• ISupportInitialize