/// <summary>

/// 获取本机的上网IP

/// </summary>

/// <returns></returns>

public static string GetConnectNetAddress()

{

string strUrl = "http://www.ip138.com/ip2city.asp"; //获得IP的网址

Uri uri = new Uri(strUrl);

WebRequest webreq = WebRequest.Create(uri);

Stream s = webreq.GetResponse().GetResponseStream();

StreamReader sr = new StreamReader(s, Encoding.Default);

string all = sr.ReadToEnd(); //读取网站返回的数据 格式：您的IP地址是：[x.x.x.x]

int i = all.IndexOf("[") + 1;

string tempip = all.Substring(i, 15);

string ip = tempip.Replace("]", "").Replace(" ", "").Replace("<", "");

return ip;

}