CachedBitmap(BitmapSource, BitmapCreateOptions, BitmapCacheOption) Konstruktor

Definition

Namnområde:
System.Windows.Media.Imaging
Sammansättning:
PresentationCore.dll

Initierar en ny instans av CachedBitmap som har det angivna alternativet källa, bitmappsskapande och bitmappscache.

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)

Parametrar

source
BitmapSource

Källbitmappen som cachelagras.

createOptions
BitmapCreateOptions

Initieringsalternativ för bitmappsbilden.

cacheOption
BitmapCacheOption

Anger hur bitmappen cachelagras till minnet.

Undantag

ArgumentNullException

Inträffar när source är null.

Exempel

I följande kodexempel visas hur du skapar och använder en CachedBitmap i kod.


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()

Gäller för

Se även