1。获取局域网ip      

IPAddress ipAddr = Dns.Resolve(Dns.GetHostName()).AddressList[0];//获得当前IP地址

string ip=ipAddr.ToString() ;

2。获取公网ip      

private static string GetIP(){    string tempip = ""; try { WebRequest wr = WebRequest.Create("http://www.ip138.com/ips138.asp"); Stream s = wr.GetResponse().GetResponseStream(); StreamReader sr = new StreamReader(s, Encoding.Default); string all = sr.ReadToEnd(); //读取网站的数据 int start = all.IndexOf("您的IP地址是：[") + 9; int end = all.IndexOf("]", start); tempip = all.Substring(start, end - start); sr.Close(); s.Close(); } catch { } return tempip; }

3.如果是ADSL上网，获取公网ip

string tempIP =string.Empty; if (System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.Length >1) tempIP = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList[1].ToString(); 最搞笑的搞笑图片、段子网站 喔尼玛 http://www.wonima.com