How to Get sub string from main big string ?

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Hello,
I want to get sub string from main string like follows .
My main string is

<iframe width="640" height="360" src="https://www.youtube.com/embed/KVlXccl-XBA" frameborder="0" allowfullscreen></iframe>

I want to get only url from this this like
https://www.youtube.com/embed/KVlXccl-XBA

So please let me know how to find this sub string from my main string.

Posted 8-Dec-15 21:17pm

Ferozkk

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_Asif_ · Answer 1 · 2015-12-08T21:29:00

Solution 1

You can use Regular Expression for this purpose. Try this

C#

Regex regex = new Regex("src=\"(.*)\"");

Posted 8-Dec-15 21:29pm

_Asif_

Mario Z · Answer 2 · 2015-12-08T21:48:00

Also here is a solution for you that does not use Regex:

C#

string mainString = "<iframe width=\"640\" height=\"360\" src=\"https://www.youtube.com/embed/KVlXccl-XBA\" frameborder=\"0\" allowfullscreen></iframe>";

int start = mainString.IndexOf("src=\"") + 5;
int count = mainString.Length - mainString.IndexOf("\"", start) - 2;

string subString = mainString.Substring(start, count);

F-ES Sitecore · Answer 3 · 2015-12-08T22:32:00

Solution 3

In addition to regex solutions, if the text you are loading is html you can use the agility pack to parse it

https://htmlagilitypack.codeplex.com/[^]

If the html is valid xml you could even use XmlDocument to parse it.

Posted 8-Dec-15 22:32pm

F-ES Sitecore