BitmapCacheOption Enumeration
.NET Framework 3.0
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
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
| Member name | Description | |
|---|---|---|
| Default | Caches the entire image into memory. This is the default value. | |
| None | Do not create a memory store. All requests for the image are filled directly by the image file. | |
| OnDemand | Creates a memory store for requested data only. The first request loads the image directly; subsequent requests are filled from the cache. | |
| OnLoad | Caches 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. Dim myImage As New Image() Dim bi As 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.Community Additions
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