C#判斷IP格式獲得當(dāng)前客戶端IP

    Visual C# IP相關(guān)操作類，獲得當(dāng)前客戶端IP，判斷IP格式，也就是檢測(cè)是否是IP地址，一些關(guān)于IP的基本操作，歡迎C#新手參考：
    01///
    02/// 獲得當(dāng)前頁(yè)面客戶端的IP
    03///
    04/// 當(dāng)前頁(yè)面客戶端的IP
    05public static string GetIP()
    06{
    07 string result = String.Empty;
    08 result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
    09 if (null == result || result == String.Empty)
    10 {
    11 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
    12 }
    13 if (null == result || result == String.Empty)
    14 {
    15 result = HttpContext.Current.Request.UserHostAddress;
    16 }
    17 if (null == result || result == String.Empty || !IsIP(result))
    18 {
    19 return "0.0.0.0";
    20 }
    21 return result;
    22}
    23///
    24/// 是否為ip
    25///
    26///
    27///
    28public static bool IsIP(string ip)
    29{
    30 return Regex.IsMatch(ip, @"^((2[0-4]d|25[0-5]|[01]?dd?).){3}(2[0-4]d|25[0-5]|[01]?dd?)$");
    31}