//获取客户端的IP地址
        TextBox1.Text = Request.UserHostAddress;//或TextBox1.Text=Request.ServerVariables ["REMOTE_ADDR"];
        //获取服务器的主机名
        string hostName = Dns.GetHostName();//引入命名空间System.Net
        //获取服务器的IP地址
        IPAddress[] ips;
        ips = Dns.GetHostAddresses(hostName);
        foreach ( IPAddress ip in ips)
        {
            TextBox2.Text = ip.ToString( );
        }

------解决方案--------------------
            IPAddress []ip = Dns.GetHostAddresses(Dns.GetHostName());
           textBox2.Text = ip[0].ToString();

------解决方案--------------------
探讨

ls几个秀逗了~~~ 

本机ip还有外网的？？