How can I get part of the following string?

Question

Lets say I have an absolute url /testserver/tools/search.aspx that I store in a variable url.

I want to check if url == /tools/search.aspx without having to use /testserver.

A more complete example would be:

My testserver contains the url http://www.testserver.com/tools/Search.aspx,

but my live server contains the url http://www.liveserver.com/tools/Search.aspx

If I compare a variable url which stores the testserver url to the liveserver url, it will fail, thats why I want to just check the /tools/Search.aspx portion.

Answer 1

if (url.ToLower().Contains("/tools/search.aspx"))
{
   //do stuff here
}

I would use Contains in case you have a query string, but you could also use EndsWith("/tools/search.aspx") if you don't have query strings.

Answer 2

You can use the property AppRelativeCurrentExecutionFilePath, which will give you the path relative the application root. So "http://host/virtualfolder/page.aspx" will be "~/page.aspx":

if (HttpContext.Current.Request.AppRelativeCurrentExecutionFilePath.Equals("~/search.aspx", StringComparison.InvariantCultureIgnoreCase))
{
    // do something
}

Answer 3

If your input is of the form "http://www.testserver.com/tools/Search.aspx":

var path1 = new Uri("http://www.testserver.com/tools/Search.aspx").AbsolutePath;
var path2 = new Uri("http://www.liveserver.com/tools/Search.aspx").AbsolutePath;

Both result in "/tools/Search.aspx".

Using the Uri is the best solution if you have to accept any URI, i.e. including those with a query string, fragment identifiers, etc.

---

If your input is of the form "/testserver.com/tools/Search.aspx" and you know that all input will always be of this form and valid and contain no other URI components:

var input = "/testserver.com/tools/Search.aspx";
var path1 = input.Substring(input.Index('/', 1));

Result is "/tools/Search.aspx".

Answer 4

Regex.Match(url, @"^.*?/tools/search\.aspx\??.*",
                 RegexOptions.IgnoreCase).Success == true

If you grab url from Request.PathInfo you won't have the domain anyway...but you question is ambiguous, as you say your have a path /testserver/ in one but not in the urls you provide.

Otherwise, set url from Request.Url.ToString()

Answer 5

If the only difference is going to be the host part of the URL I would use the System.Uri class to compare their absolute paths (the "tools/Search.aspx" part of the uri).

Here's an example of how to do it:

static void Main(string[] args)
{
    //load up the uris
    Uri uri = new Uri("http://www.testserver.com/tools/search.aspx");            
    Uri matchingUri = new Uri("http://www.liveserver.com/tools/search.aspx");
    Uri nonMatchingUri = new Uri("http://www.liveserver.com/tools/cart.aspx");

    //demonstrate what happens when the uris match
    if (uri.AbsolutePath == matchingUri.AbsolutePath)
        Console.WriteLine("These match");
    //demonstrate what happens when the uris don't match
    if (uri.AbsolutePath != nonMatchingUri.AbsolutePath)
        Console.WriteLine("These do not match");
}