using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?J)https?://(?:[a-z0-9]+\.)?livestream\.com/
(?:
(?<id>accounts/[0-9]+/events/[0-9]+(?:/videos/[0-9]+)?)
|
[^\s/]+/video\?clipId=(?<id>[^\s&]+)
|
(?<id>[^\s/]+)
)";
string input = @"http://original.livestream.com/bethanychurchnh = bethanychurchnh
http://original.livestream.com/bethanychurchnh/video?clipId=flv_b54a694b-043c-4886-9f35-03c8008c23 = flv_b54a694b-043c-4886-9f35-03c8008c23
http://livestream.com/accounts/142499/events/3959775 = accounts/142499/events/3959775
http://livestream.com/accounts/142499/events/3959775/videos/83958146 = /accounts/142499/events/3959775/videos/83958146";
RegexOptions options = RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx