BitmapImage.BeginInit Method

.NET Framework 3.0
Signals the start of the BitmapImage initialization.

Namespace: System.Windows.Media.Imaging
Assembly: PresentationCore (in presentationcore.dll)

C#
C++
VB
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public void BeginInit ()
J#
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public final void BeginInit ()
JScript
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public final function BeginInit ()
XAML
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You cannot use methods in XAML.

Exception typeCondition

InvalidOperationException

The BitmapImage is currently being initialized. BeginInit has already been called.

-or-

The BitmapImage has already been initialized.

Property initialization must be done between BeginInit and EndInit calls. Once the BitmapImage has been initialized, property changes are ignored.

The following example demonstrates how to initialize a BitmapImage with a set of properties by using the BeginInit and EndInit methods.

C#
VB
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// 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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