C# 分享几个ip的方法吧，包括正则验证ip

/// <summary>
/// 正规则试验IP地址
/// </summary>
/// <param name="IP"></param>
/// <returns></returns>
public bool IPCheck(string IP)
{
string num = "(25[0-5]|2[0-4]\\d|[0-1]\\d{2}|[1-9]?\\d)";
return Regex.IsMatch(IP, ("^" + num + "\\." + num + "\\." + num + "\\." + num + "[ DISCUZ_CODE_0 ]quot;));
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
System.Environment.Exit();
}
#region ip转换
/// <summary>
/// ip转成long
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static long IpToInt(string ip)
{
char[] separator = new char[] { '.' };
string[] items = ip.Split(separator);
return long.Parse(items[]) <<
| long.Parse(items[]) <<
| long.Parse(items[]) <<
| long.Parse(items[]);
}
/// <summary>
/// long转成ip
/// </summary>
/// <param name="ipInt"></param>
/// <returns></returns>
public static string IntToIp(long ipInt)
{
StringBuilder sb = new StringBuilder();
sb.Append((ipInt >> ) & 0xFF).Append(".");
sb.Append((ipInt >> ) & 0xFF).Append(".");
sb.Append((ipInt >> ) & 0xFF).Append(".");
sb.Append(ipInt & 0xFF);
return sb.ToString();
}
#endregion