語言

CachedBitmap(BitmapSource, BitmapCreateOptions, BitmapCacheOption) 建構函式

定義

命名空間:
System.Windows.Media.Imaging
組件:
PresentationCore.dll

初始化一個新的實例，該實例 CachedBitmap 包含指定的來源、位圖建立選項及位圖快取選項。

public:
 CachedBitmap(System::Windows::Media::Imaging::BitmapSource ^ source, System::Windows::Media::Imaging::BitmapCreateOptions createOptions, System::Windows::Media::Imaging::BitmapCacheOption cacheOption);
public CachedBitmap(System.Windows.Media.Imaging.BitmapSource source, System.Windows.Media.Imaging.BitmapCreateOptions createOptions, System.Windows.Media.Imaging.BitmapCacheOption cacheOption);
new System.Windows.Media.Imaging.CachedBitmap : System.Windows.Media.Imaging.BitmapSource * System.Windows.Media.Imaging.BitmapCreateOptions * System.Windows.Media.Imaging.BitmapCacheOption -> System.Windows.Media.Imaging.CachedBitmap
Public Sub New (source As BitmapSource, createOptions As BitmapCreateOptions, cacheOption As BitmapCacheOption)

參數

source
BitmapSource

正在快取的來源位圖。

createOptions
BitmapCreateOptions

點陣圖影像的初始化選項。

cacheOption
BitmapCacheOption

指定點陣圖如何快取到記憶體。

例外狀況

ArgumentNullException

當 source 為 null時發生。

範例

以下程式碼範例說明如何建立並使用 in CachedBitmap code。


CachedBitmap cachedSource = new CachedBitmap(
    scaledSource, 
    BitmapCreateOptions.None,
    BitmapCacheOption.OnLoad);


// Create a new BitmapSource using a different format than the original one.
FormatConvertedBitmap newFormatSource = new FormatConvertedBitmap();
newFormatSource.BeginInit();
newFormatSource.Source = cachedSource;
newFormatSource.DestinationFormat = PixelFormats.Gray32Float;
newFormatSource.EndInit();

Dim cachedSource As New CachedBitmap(scaledSource, BitmapCreateOptions.None, BitmapCacheOption.OnLoad)
' Create a new BitmapSource using a different format than the original one.
Dim newFormatSource As New FormatConvertedBitmap()
newFormatSource.BeginInit()
newFormatSource.Source = cachedSource
newFormatSource.DestinationFormat = PixelFormats.Gray32Float
newFormatSource.EndInit()

適用於

另請參閱