How to avoid UriBuilder creating a Uri with an unregistered + sign in the query string?

Question

I have some problems with the UriBuilder and Uri tutorials in .NET. I want to build Uri with UriBuilder and then use the resulting Uri. However, I can’t get him to correctly encode the plus sign in his query string?

Here is an example of a little code:

var ub = new UriBuilder(); ub.Query = "t=a%2bc"; Console.WriteLine(ub.Uri.ToString()); 

This example gives me http://localhost/?t=a+c , but I would expect the plus sign to be encoded in% 2b, like this, http://localhost/?t=a%2bc , otherwise I will not I can use url.

I could, of course, create a string instead, but I would rather use a strongly typed Uri, if possible.

Answer 1

Interestingly, this is apparently “fixed” in .NET 4.5.

This is the result of my testing in .NET 4.0 : (from a direct window)

 ? ub.Uri.ToString() "http://localhost/?t=a+c" 

But in .NET 4.5 :

 ? ub.Uri.ToString() "http://localhost/?t=a%2bc" 

This is what you are looking for.

Can you upgrade to 4.5? This will fix your problem.

If you cannot update, let me know and I will try to find a job.

Answer 2

As a result, I got a custom Uri class, which now exchanges Uri until we have the opportunity to upgrade to VS2012 / .Net4.5. Most Uris in the Im system working on them are not created by adding Uris, but instead using the Querybuilder method, which means it was “easy” to replace this part to return Uri2 instead of Uri.

 public class Uri2 : Uri { public Uri2(Uri uri) : base(uri.ToString()) { } public override string ToString() { var s = base.ToString(); s = s.Replace("+", "%2b"); return s; } } 

Answer 3

Use AbsoluteUri instead of ToString ():

 var ub = new UriBuilder(); ub.Query = "t=a%2bc"; Console.WriteLine(ub.Uri.AbsoluteUri); 

this gives the correct result:

 http://localhost/?t=a%2bc