We are developing a WPF desktop application that is displaying images that are currently being fetched over HTTP.
The images are already optimised for quality/size but there is an obvious wait each time that the image is fetched.
Is there a way to cache images on the client so that they aren't downloaded each time?
If you're just trying to cache within the same run, then a local dictionary could function as a runtime cache.
If you're trying to cache between application runs, it gets trickier.
If this is a desktop application, just save the cached images locally in the user's application data folder.
If it's an XBAP application (WPF in Browser), you'll only be able to setup a local cache in the user's Isolated Storage, due to security.
I have solved this by creating a Binding Converter using the IValueConverter interface. Given that I tried to find a solid solution for this for at least a week, I figured I should share my solution for those with this problem in the future.
Here is my blog post: Image Caching for a WPF Desktop Application