C# 获得主机IP地址

             string hostname = Dns.GetHostName();
            IPHostEntry hostentry = Dns.GetHostEntry(hostname);
            for(int i=0;i<hostentry.AddressList.Length;i++)
            {
                if(hostentry.AddressList[i].AddressFamily ==AddressFamily.InterNetwork)
                {
                    hostname = hostentry.AddressList[i].ToString();
                }
            }

第一步：获得主机名称由

string hostname = Dns.GetHostName();

第二步：获得主机获得所有的主机地址信息

IPHostEntry hostentry = Dns.GetHostEntry(hostname);

相当于命令行 cmd -  -ipconfig 查看得到的主机信息

第三步：循环对比查找对应的IP地址

for(int i=0;i<hostentry.AddressList.Length;i++)
            {
                if(hostentry.AddressList[i].AddressFamily ==AddressFamily.InterNetwork)
                {
                    hostip= hostentry.AddressList[i].ToString();
                }
            }

对比IP地址簇 通常使用的是IPV4地址