Getting the parent name of a URI/URL from absolute name C#

Question

Given an absolute URI/URL, I want to get a URI/URL which doesn\'t contain the leaf portion. For example: given http://foo.com/bar/baz.html, I should get http://foo.com/bar/.

Answer 1

This is the shortest I can come up with:

static string GetParentUriString(Uri uri)
{
    return uri.AbsoluteUri.Remove(uri.AbsoluteUri.Length - uri.Segments.Last().Length);
}

If you want to use the Last() method, you will have to include System.Linq.

Answer 2

PapyRef's answer is incorrect, UriPartial.Path includes the filename.

new Uri(uri, ".").ToString()

seems to be cleanest/simplest implementation of the function requested.

Answer 3

I read many answers here but didn't find one that I liked because they break in some cases.

So, I am using this:

public Uri GetParentUri(Uri uri) {
    var withoutQuery = new Uri(uri.GetComponents(UriComponents.Scheme |
                                                 UriComponents.UserInfo |
                                                 UriComponents.Host |
                                                 UriComponents.Port |
                                                 UriComponents.Path, UriFormat.UriEscaped));
    var trimmed = new Uri(withoutQuery.AbsoluteUri.TrimEnd('/'));
    var result = new Uri(trimmed, ".");
    return result;
}

Note: It removes the Query and the Fragment intentionally.

Answer 4

Thought I'd chime in; despite it being almost 10 years, with the advent of the cloud, getting the parent Uri is a fairly common (and IMO more valuable) scenario, so combining some of the answers here you would simply use (extended) Uri semantics:

public static Uri Parent(this Uri uri)
{
    return new Uri(uri.AbsoluteUri.Remove(uri.AbsoluteUri.Length - uri.Segments.Last().Length - uri.Query.Length).TrimEnd('/'));
}

var source = new Uri("https://foo.azure.com/bar/source/baz.html?q=1");

var parent = source.Parent();         // https://foo.azure.com/bar/source
var folder = parent.Segments.Last();  // source

I can't say I've tested every scenario, so caution advised.

Answer 5

Did you try this? Seems simple enough.

Uri parent = new Uri(uri, "..");

Answer 6

Quick and dirty

int pos = uriString.LastIndexOf('/');
if (pos > 0) { uriString = uriString.Substring(0, pos); }