Cropping or Clipping in WPF

The Clip property of an element (defined in the UIElement class) is used to clip a region and represents the geometry that defines the content of an element.

The Clip property takes a Geometry type that can be a line, rectangle, ellipse, or group geometry.

The following XAML code snippet uses an Image object to display an image.

<Image Source="Raj 059.JPG"
Width="300"
Height="300">
</Image>

The output looks like Figure 1.



Figure 1.

The XAML code in Listing 1 sets the Image.Clip property to an EllipseGeometry and sets the RadiusX, RadiusY, and Center properties of the geometry.

<Image Source="Raj 059.JPG" Width="300" Height="300">
  <Image.Clip>
    <EllipseGeometry
        RadiusX="100"
          RadiusY="100"
            Center="120,120"/>
  </Image.Clip>
</Image>
The new output looks like Figure 2.



Figure 2. A clipped image

Since the Clip property is defined in the UIElement, it can be applied to any element. For example, the following code generates a rectangle looks like Figure 3.

<Rectangle Width="300" Height="200"  
Stroke="Red"
StrokeThickness="4"  
Fill="Green">
</Rectangle>



Figure 3. A rectangle

Now we can apply clipping on the rectangle and the new output looks like Figure 4 with the following code.

<Rectangle Width="300" Height="200" 
 Stroke="Red"
       StrokeThickness="4"  
 Fill="Green">
  <Rectangle.Clip>
    <EllipseGeometry  
        RadiusX="150" 
        RadiusY="100" 
        Center="150,100"/>
  </Rectangle.Clip>
</Rectangle>



Figure 4. A clipped rectangle

For more information download attached application.