Why Isn't My WPF Image Rendering, and How Can I Use Pack URIs to Fix It?

Troubleshooting WPF Image Rendering with Pack URIs

Your WPF image isn't displaying even though the image data is present? The problem likely lies in how you're referencing the image. The solution is to use Pack URIs, which correctly reference resources embedded within your application's assembly.

Here's the corrected approach:

1. Image Initialization: Begin by creating your Image object:

Image finalImage = new Image();
finalImage.Width = 80;

2. Setting the Image Source with a Pack URI: Use a BitmapImage and its UriSource property, specifying the Pack URI:

BitmapImage logo = new BitmapImage();
logo.BeginInit();
logo.UriSource = new Uri("pack://application:,,,/AssemblyName;component/Resources/logo.png");
logo.EndInit();
finalImage.Source = logo;

A more concise alternative is:

finalImage.Source = new BitmapImage(new Uri("pack://application:,,,/AssemblyName;component/Resources/logo.png"));

3. Understanding the Pack URI:

   • pack://application:,,,/: The URI scheme. Note the three commas.
   • AssemblyName: Replace this with the actual name of your assembly (e.g., MyApplication).
   • component/Resources/logo.png: The path to your image within your project's Resources folder.

4. Important Considerations:

   • Comma Separators: The three slashes after application in the standard Pack URI scheme must be replaced with commas (,).
   • Escaping Reserved Characters: Properly escape any reserved URI characters (like % and ?) in your path.
   • Build Action: Crucially, ensure your image file in your project has its "Build Action" property set to "Resource."

By following these steps and ensuring your image is correctly embedded and referenced, your WPF image should render correctly.

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