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BitmapCacheOption Enumeration

Specifies how a bitmap image takes advantage of memory caching.

Namespace: System.Windows.Media.Imaging
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public enum BitmapCacheOption
public enum BitmapCacheOption
public enum BitmapCacheOption
<object property="EnumerationValue" .../>

 Member nameDescription
DefaultCaches the entire image into memory. This is the default value. 
NoneDo not create a memory store. All requests for the image are filled directly by the image file. 
OnDemandCreates a memory store for requested data only. The first request loads the image directly; subsequent requests are filled from the cache. 
OnLoadCaches the entire image into memory at load time. All requests for image data are filled from the memory store. 

The following code example demonstrates how to load a BitmapImage and specify the BitmapCacheOption.

// Define a BitmapImage.
Image myImage = new Image();
BitmapImage bi = new BitmapImage();

// Begin initialization.
bi.BeginInit();

// Set properties.
bi.CacheOption = BitmapCacheOption.OnDemand;
bi.CreateOptions = BitmapCreateOptions.DelayCreation;
bi.DecodePixelHeight = 125;
bi.DecodePixelWidth = 125;
bi.Rotation = Rotation.Rotate90;
MessageBox.Show(bi.IsDownloading.ToString());
bi.UriSource = new Uri("smiley.png", UriKind.Relative);

// End initialization.
bi.EndInit();
myImage.Source = bi;
myImage.Stretch = Stretch.None;
myImage.Margin = new Thickness(5);

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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