TransformedBitmap.BeginInit 方法

定義

命名空間:

System.Windows.Media.Imaging

組件:

PresentationCore.dll

表示 TransformedBitmap 初始化開始。

public:
 virtual void BeginInit();

public void BeginInit ();

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

Public Sub BeginInit ()

實作

BeginInit()

例外狀況

InvalidOperationException

TransformedBitmap 目前正在起始。 已經呼叫 BeginInit()。

-或-

TransformedBitmap 已經完成初始化。

範例

下列範例示範如何使用 和 EndInit 方法，以 BeginInit 一組屬性初始化 TransformedBitmap 。

// 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()

備註

必須在 和 EndInit 呼叫之間 BeginInit 完成屬性初始化。 TransformedBitmap初始化 之後，就會忽略屬性變更。

另請參閱

• EndInit()
• ISupportInitialize