Extract Chinese text from Query string

I need to extract Chinese characters from the query string in an ASP.NET web application. When I tried it, I get "????" instead of the actual text. I know I need to decode it with UTF-8 but its does not work. I have used:

String text = System.Web.HttpUtility.UrlDecode(Request.QueryString["text"], System.开发者_如何学PythonText.Encoding.UTF8);

but I get "???" back from the operation.

Please help.

---

There are two cases.

1st Case where your URL is real in chinese, the only function that get it is the Request.RawUrl (and not the Request.QueryString["text"]) From Request.RawUrl you need manually get your Chinese text from text=ελληνικασανκινεζικα.

2nd Case where you have first Encode your URL string before you send it. In this case the code I use is

String text = Server.UrlDecode(Request.QueryString["text"]);

Hope this help.

Note: If you try to make test with Google Chrome, then what you type on url chrome is encode/decode automatically by browser and you are not see what actual you send. Try to use ie, for make your test.