BitmapImage.DecodePixelWidth Property (System.Windows.Media.Imaging)

DecodePixelWidth Property

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Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

BitmapImage..::.DecodePixelWidth Property

Gets or sets the width, in pixels, that the image is decoded to. This is a dependency property.

Namespace: System.Windows.Media.Imaging
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/xaml/presentation

Syntax

Visual Basic (Declaration)

Public Property DecodePixelWidth As Integer

Visual Basic (Usage)

Dim instance As BitmapImage
Dim value As Integer

value = instance.DecodePixelWidth

instance.DecodePixelWidth = value

public int DecodePixelWidth { get; set; }

Visual C++

public:
property int DecodePixelWidth {
    int get ();
    void set (int value);
}

JScript

public function get DecodePixelWidth () : int
public function set DecodePixelWidth (value : int)

XAML Attribute Usage

<object DecodePixelWidth="int" .../>

Property Value

Type: System..::.Int32
The width, in pixels, that the image is decoded to. The default value is 0.

Dependency Property Information

Identifier field	DecodePixelWidthProperty
Metadata properties set to true	None

Remarks

If DecodePixelHeight is not set, the aspect ratio of the bitmap remains unaltered. If DecodePixelHeight is set, the aspect ratio is ignored.

The JPEG and Portable Network Graphics (PNG) codecs natively decode the image to the specified size; other codecs decode the image at its original size and scale the image to the desired size.

Examples

The following code example demonstrates how to set the DecodePixelWidth property by using code.

Visual Basic

' 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)

// 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);

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0

Reference

BitmapImage Class

BitmapImage Members

System.Windows.Media.Imaging Namespace

DecodePixelHeight