.net - How to combine URIs

Question

I have two Uri objects passed into some code, one is a directory and the other is a filename (or a relative path)

var a = new Uri("file:///C:/Some/Dirs");
var b = new Uri("some.file");

when I try and combine them like this:

var c = new Uri(a,b);

I get

file:///C:/Some/some.file

where I wold expect to get the same effect as with Path.Combine (as that is the old code I need to replace):

file:///C:/Some/Dirs/some.file

I can't think of a clean solution to this.

The ugly solution being to add a / to the Uri if it's not there

string s = a.OriginalString;
if(s[s.Length-1] != '/')
   a = new Uri(s + "/");

Answer 1

This should do the trick for you:

var baseUri = new Uri("http://www.briankeating.net");
var absoluteUri = new Uri(baseUri, "/api/GetDefinitions");

This constructor follow the standard relative URI rules so the / are important :

• http://example.net + foo = http://example.net/foo
• http://example.net/foo/bar + baz = http://example.net/foo/baz
• http://example.net/foo/ + bar = http://example.net/foo/bar
• http://example.net/foo + bar = http://example.net/bar
• http://example.net/foo/bar/ + /baz = http://example.net/baz