BitmapImage.CacheOption Property

Reference

Definition

Namespace:: System.Windows.Media.Imaging

Assembly:: PresentationCore.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets the BitmapCacheOption to use for this instance of BitmapImage.

public:
 property System::Windows::Media::Imaging::BitmapCacheOption CacheOption { System::Windows::Media::Imaging::BitmapCacheOption get(); void set(System::Windows::Media::Imaging::BitmapCacheOption value); };

public System.Windows.Media.Imaging.BitmapCacheOption CacheOption { get; set; }

member this.CacheOption : System.Windows.Media.Imaging.BitmapCacheOption with get, set

Public Property CacheOption As BitmapCacheOption

Property Value

BitmapCacheOption

The BitmapCacheOption being used for the BitmapImage. The default is Default.

Examples

The following code example demonstrates how to set the CacheOption of a BitmapImage by using code.

// 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);

' 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)

Remarks

Set the CacheOption to BitmapCacheOption.OnLoad if you wish to close a stream used to create the BitmapImage. The default OnDemand cache option retains access to the stream until the image is needed, and cleanup is handled by the garbage collector.

Dependency Property Information


Identifier field	CacheOptionProperty
Metadata properties set to `true`	None

Applies to

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