BitmapImage.BeginInit Method
Definition
Important
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Signals the start of the BitmapImage initialization.
public:
virtual void BeginInit();
public void BeginInit ();
abstract member BeginInit : unit -> unit
override this.BeginInit : unit -> unit
Public Sub BeginInit ()
Implements
Exceptions
The BitmapImage is currently being initialized. BeginInit() has already been called.
-or-
The BitmapImage has already been initialized.
Examples
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);
' 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
Property initialization must be done between BeginInit and EndInit calls. Once the BitmapImage has been initialized, property changes are ignored.
Applies to
See also
.NET
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