Use CroppedBitmap in code : Image « Windows Presentation Foundation « VB.Net Tutorial






<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="ImageElementExample.CroppedImageExample"
    Title="CroppedImage Example"
    Loaded="PageLoaded">
    <Page.Resources>
       <BitmapImage x:Key="masterImage" UriSource="c:\image.jpg" />
       <CroppedBitmap x:Key="croppedImage" Source="{StaticResource masterImage}" SourceRect="30 20 105 50"/>
    </Page.Resources>
    <StackPanel>
         <Image Width="200" Source="{StaticResource masterImage}"/>
         <Image Width="200" Source="{StaticResource croppedImage}"/>
         <Image Width="200">
            <Image.Source>
               <CroppedBitmap Source="{StaticResource croppedImage}" SourceRect="30 0 75 50"/>
            </Image.Source>
         </Image>
   </StackPanel>
</Page>

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Documents
Imports System.Windows.Controls
Imports System.Windows.Navigation
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging


Namespace ImageElementExample
  Public Partial Class CroppedImageExample
    Inherits Page
    Public Sub New()
    End Sub

    Public Sub PageLoaded(sender As Object, args As RoutedEventArgs)
      Dim croppedImage As New Image()
      croppedImage.Width = 200
      croppedImage.Margin = New Thickness(5)

      Dim cb As New CroppedBitmap(DirectCast(Me.Resources("masterImage"), BitmapSource), New Int32Rect(30, 20, 105, 50))
      croppedImage.Source = cb

      Dim chainImage As New Image()
      chainImage.Width = 200

      Dim chained As New CroppedBitmap(cb, New Int32Rect(30, 0, CInt(Math.Truncate(cb.Width)) - 30, CInt(Math.Truncate(cb.Height))))
      chainImage.Source = chained
    End Sub
  End Class
End Namespace








16.78.Image
16.78.1.GeometryGroup as ImageGeometryGroup as Image
16.78.2.DrawingImage with GeometryDrawingDrawingImage with GeometryDrawing
16.78.3.Showing an image at its natural sizeShowing an image at its natural size
16.78.4.The image is not resized in ImageBrushThe image is not resized in ImageBrush
16.78.5.Using an image resourceUsing an image resource
16.78.6.Stretch Fill Image SourceStretch Fill Image Source
16.78.7.Fill a Shape with an ImageFill a Shape with an Image
16.78.8.Draw a line using a part of the source imageDraw a line using a part of the source image
16.78.9.Style for the tileStyle for the tile
16.78.10.Use image to fill an EllipseUse image to fill an Ellipse
16.78.11.Set width for ImageSet width for Image
16.78.12.Set vertical alignment for ImageSet vertical alignment for Image
16.78.13.Morphing an ImageMorphing an Image
16.78.14.Load image from a URILoad image from a URI
16.78.15.Load image source from a hard code directoryLoad image source from a hard code directory
16.78.16.Transformed image exampleTransformed image example
16.78.17.Load image with BitmapImageLoad image with BitmapImage
16.78.18.Load image in your code and add to gridLoad image in your code and add to grid
16.78.19.Use Render Target BitmapUse Render Target Bitmap
16.78.20.FormatConvertedBitmap DestinationFormat=Gray4FormatConvertedBitmap DestinationFormat=Gray4
16.78.21.Use CroppedBitmap in codeUse CroppedBitmap in code
16.78.22.2D Drawings with DrawingImage2D Drawings with DrawingImage
16.78.23.Image GalleryImage Gallery
16.78.24.Clip an ImageClip an Image