QueryString malformed after URLDecode

Question

I\'m trying to pass in a Base64 string into a C#.Net web application via the QueryString. When the string arrives the \"+\" (plus) sign is being replaced by a space. It appe

Answer 1

I'm having this exact same issue except I have control over my URL. Even with Server.URLDecode and Server.URLEncode it doesn't convert it back to a + sign, even though my query string looks as follows:

http://localhost/childapp/default.aspx?TokenID=0XU%2fKUTLau%2bnSWR7%2b5Z7DbZrhKZMyeqStyTPonw1OdI%3d

When I perform the following.

string tokenID = Server.UrlDecode(Request.QueryString["TokenID"]);

it still does not convert the %2b back into a + sign. Instead I have to do the following:

string tokenID = Server.UrlDecode(Request.QueryString["TokenID"]);
tokenID = tokenID.Replace(" ", "+");

Then it works correctly. Really odd.