C# 获取当前主机网络（公网）IP地址

1、百度搜索IP地址第一项会显示当前主机IP，点进去发现是www.ip138.com 获取的直接提交：“http://1111.ip138.com/ic.asp”就会返回IP地址

3、private void button1_Click(object sender, EventArgs e) { try { WebClient wc = new WebClient(); wc.Credentials = CredentialCache.DefaultCredentials; byte[] pageData = wc.DownloadData("http://1111.ip138.com/ic.asp"); string SourceCode = Encoding.UTF8.GetString(pageData); // saveSourceCode(SourceCode); wc.Dispose(); } catch (Exception x) { throw new Exception("获取异常，" + x.Message); } Match rebool = Regex.Match(SourceCode, @"\d{2,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"); string value = rebool.Value; textBox1.Text = value;//文本框1获得的就是网络IP地址}