问题
I want to use the windows OpenFileDialog class in C# to browse files for my application. I would then like the files to show up with previews in Windows' "thumbnails" view.
Is there a simple way to make this happen? I'm thinking there should be a way to encode the files so that Windows simply reads and displays the thumbnail information, even though it's an unsupported file type?
I know Windows Vista has a different interface (IThumbnailProvider as opposed to IExtractImage) than Windows XP, but I need it to work across platforms.
Thanks! / Jakob
回答1:
You have to write a Shell Extension Handler Thumbnail Image Extractor. This is unmanaged c++ code that extracts the image from your custom filetype to display within explorer shell. You can find more about Shell Extension Handlers at the following link:
Creating Shell Extension Handlers
来源：https://stackoverflow.com/questions/2695411/coerce-windows-to-show-a-thumbnail-for-my-custom-file-type