在字符串c＃的第三次出现后如何获取子字符串

Question

How can I find use the substring method so I can get everything after the 3rd occurence of "/" for example I have string that contains: http://TEST.COM/page/subpage

How can I extract page/subpage this from the above string (in c#)?

Answer 1

If you are working with URL's you can use Uri class:

var url = new Uri("http://TEST.COM/");
var path = url.MakeRelativeUri(new Uri("http://TEST.COM/page/subpage"));

Answer 2

You can use split() :

    // The directory 
    string dir = "http://TEST.COM/page/subpage";
    // Split on directory separator
    string[] parts = dir.Split('/');

And you will have an array. You can do with it what you want. And Split() string as you wish.

Answer 3

There could be various ways:

As @Selman mentioned using Uri class:

var url = new Uri("http://TEST.COM/");
var path = url.MakeRelativeUri(new Uri("http://TEST.COM/page/subpage"));

using IndexOf

var offset = myString.IndexOf('/');
offset = myString.IndexOf('/', offset+1);
var result = myString.IndexOf('/', offset+1);