Rotation 枚举

定义

命名空间:

System.Windows.Media.Imaging

程序集:

PresentationCore.dll

指定要应用到位图图像的旋转。

public enum class Rotation

public enum Rotation

type Rotation = 

Public Enum Rotation

继承

Object

ValueType

Enum

Rotation

字段

Rotate0	0	不旋转位图。 这是默认值。
Rotate180	2	将位图顺时针旋转 180 度。
Rotate270	3	将位图顺时针旋转 270 度。
Rotate90	1	将位图顺时针旋转 90 度。

示例

以下示例演示如何将旋转应用于位图图像。

// 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)

注解

仅支持 90 度的增量。

另请参阅

• BitmapSource
• Rotation