C# WPF, and data exchange with the browser

Question

I've a C# WPF application developed in VS 2015, and I want the browser to read some data from it. Just a short string. I can save it in a text file, or in a variable but it should be visible to the browser (using JS I suppose). For instance using file:/// doesn't work if the original page is hosted online - as in my case (different source conflict). This should work in Opera and FFox, but looking at their extensions, it seems you can only develop with front-end technologies, which are not enough in my case since I use WPF to look into Win OS, and then I need to share the result with the browser.

I suspect it's possible, and no , it's not to write a malicious piece of code. For instance I can read the details of the graphic card for diagnostic purposes. Please help, many thanks.

Answer 1

Browsers run in a security sandbox which is intended to stop them reading or writing files to the file system. You could write to the user's appdata. There are various javascript frameworks which persist data to there so they can provide offline or static data. I don't think that is a good plan though.

I suggest your first candidate would be a cookie. Quick google on how to do that, I find: How to create cookie in c#.net windows application?

From a web page you can use the content of a cookie dynamically. So you could change what you see in the web page after it's up and running from some process in your wpf app and do a counter or whatever.

I've not used this with windows apps and a browser but I have with a web app and Silverlight. I'm afraid I don't have that code to hand though.