BitmapImage.BeginInit Method
Signals the start of the BitmapImage initialization.
Assembly: PresentationCore (in PresentationCore.dll)
| Exception | Condition |
|---|---|
| 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.
// 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 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
