将点分十进制IP地址转为对应的数值

/// <summary>  
/// IP地址转换函数  
/// </summary>  
/// <param name="ip">点分十进制IP</param>  
/// <returns>转换后的数值</returns>  
protected Int64 GetIpToInt(string ip)  
{  
    string[] arrIP = ip.Split('.');  
    Int64 IntIP = Int64.Parse(arrIP[0]) * 255 * 255 * 255 + Int64.Parse(arrIP[1]) * 255 * 255 + Int64.Parse(arrIP[2]) * 255 + Int32.Parse(arrIP[3]);  
    return IntIP;  
}

//字符串转换为数字  
System.Net.IPAddress ipaddress = System.Net.IPAddress.Parse("192.168.1.1");  
long dreamduip = ipaddress.Address;
 

//数字转换为字符串  
System.Net.IPAddress ipaddress = System.Net.IPAddress.Parse("3194548456");  
string strdreamduip = ipaddress.ToString();