Zi 字媒體
2017-07-25T20:27:27+00:00
C# 正規表示式 Regular Expression 判斷字串是否是Domain
GITHUB: https://github.com/jash-git/Console_CS_IsDomainString
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
/*
參考資料:
http://www.daimacuowu.com/q/c6ab8f28628486b1
https://msdn.microsoft.com/zh-tw/library/01escwtf(v=vs.110).aspx
*/
namespace Console_CS_IsDomainString
{
class Program
{
static bool isDomainString(String Data)
{
Match match = Regex.Match(Data, @"^(([\w][\w\-\.]*)\.)?([\w][\w\-]+)(\.([\w][\w\.]*))?$");
String domain = match.Groups[1].Value;
if (domain != "")
{
return true;
}
else
{
return false;
}
}
static void pause()
{
Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);
}
static void Main(string[] args)
{
String data="http://www.yahoo.com";
Console.WriteLine("{0}={1}", data, isDomainString(data));
data = "www.yahoo.com";
Console.WriteLine("{0}={1}", data, isDomainString(data));
data = "www.yahoo";
Console.WriteLine("{0}={1}", data, isDomainString(data));
data = "www";
Console.WriteLine("{0}={1}", data, isDomainString(data));
pause();
}
}
}
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