NameValueCollection to URL Query?

Question

I know i can do this

var nv = HttpUtility.ParseQueryString(req.RawUrl);

But is there a way to convert this back to a url?

v         


        

Answer 1

The short answer is to use .ToString() on the NameValueCollection and combine it with the original url.

However, I'd like to point out a few things:

You cant use HttpUtility.ParseQueryString on Request.RawUrl. The ParseQueryString() method is looking for a value like this: ?var=value&var2=value2.

If you want to get a NameValueCollection of the QueryString parameters just use Request.QueryString().

var nv = Request.QueryString;

To rebuild the URL just use nv.ToString().

string url = String.Format("{0}?{1}", Request.Path, nv.ToString());

If you are trying to parse a url string instead of using the Request object use Uri and the HttpUtility.ParseQueryString method.

Uri uri = new Uri("");
var nv = HttpUtility.ParseQueryString(uri.Query);
string url = String.Format("{0}?{1}", uri.AbsolutePath, nv.ToString());