using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"( *?https{0,1}:\/\/w{0,3}.*| *?ftp:\/\/w{0,3}.*| *?\n)";
string input = @"http://www.abcd.com.br
https://pt.stackoverflow.com/questions/79908/validar-url-express%C3%A3o-regular
ftp://algumacoisa.aqui.jap
eu não sou uma URL
ftp://www. eu tenho espaços em branco . com
";
foreach (Match m in Regex.Matches(input, pattern))
{
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