TimoYang

BrockAllen

So you get a 404? The type needs to be fully qualified like this:

<add path="*req" verb="*" type="Namespace.ClassName, AssemblyName"/>

Not 404，the page runs well but shows me a red cross in the position of "<img>"……:(

Take your code that creates the images and instead of send it back from a http request, save it to disk and then try to open it with a image viewer. I'm guessing it's something to do with how you create the image, not how you serve it over http.