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 byl volána.

nebo

Již TransformedBitmap byla inicializována.

Příklady

Následující příklad ukazuje, jak inicializovat TransformedBitmap pomocí sady vlastností pomocí BeginInit a EndInit metod.

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

Viz také

• EndInit()
• ISupportInitialize