版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/sw1995126/article/details/79240761
/// <summary>
/// ip地址，网络字节序，long类型
/// </summary>
/// <param name="ipmsg">文件名</param>
public long IpChange(string ipmsg)
{
char[] separator = new char[] { '.' };
string[] items = ipmsg.Split(separator);
long dreamduip = long.Parse(items[0]) << 24
| long.Parse(items[1]) << 16
| long.Parse(items[2]) << 8
| long.Parse(items[3]);
long sun = System.Net.IPAddress.HostToNetworkOrder(dreamduip);
return sun;
}