How Can I Dynamically Load Images in WPF?

Dynamic loading of images in WPF

WPF applications often need to load images from external resources at runtime. With the resources provided by the .NET framework, the process is very simple and straightforward.

Use the BitmapImage class to load images at runtime. It provides a Source attribute that accepts a Uri or Stream object. Therefore, you can specify image position in a variety of ways.

Use Uri

Uri Image files can be referenced directly, regardless of their location. The following are several common Uri formats:

• Local files: Uri("file://path/to/image.png")
• Internet resources: Uri("http://server/image.png")
• Assembly resources: Uri("pack://application:,,,/AssemblyName;component/path/to/image.png")

Example of using Uri:

<code class="language-csharp">var uri = new Uri("pack://application:,,,/Bilder/sas.png");
var bitmap = new BitmapImage(uri);
image1.Source = bitmap;</code>

Use Stream

If the image is provided as Stream, you can use the following code:

<code class="language-csharp">using (var stream = new FileStream("path/to/image.png", FileMode.Open))
{
    var bitmap = new BitmapImage();
    bitmap.BeginInit();
    bitmap.StreamSource = stream;
    bitmap.EndInit();
    image1.Source = bitmap;
}</code>

Set image source

After creating the BitmapImage object, you need to assign it to the Image attribute of the Source control in XAML. For example:

<code class="language-xml"><Image x:Name="image1" /></code>

<code class="language-csharp">image1.Source = bitmap;</code>

Other instructions:

• Make sure the application can access the image file and has the correct permissions set.
• If you load the image from an assembly resource, make sure the image file's Build Action is set to "Resource" in Visual Studio.
• You can use the Image.Stretch attribute to control how an image appears within a given space.

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