获取google天气预报的ASP.NET代码

获取google天气预报的ASP.NET代码

string city = string.Empty;



if (Request.QueryString["city"] != null && Regex.IsMatch(Request.QueryString["city"], "^[\u4e00-\u9fa5]+$", RegexOptions.Compiled))

{

    city = Request.QueryString["city"];

}

else

{

    string ip = Request.UserHostAddress;

    IPLocation iplocation = IPLocationSearch.GetIPLocation(ip);

    city = iplocation.country;

}

if (city != string.Empty)

{

    string url = string.Format("http://www.google.cn/search?hl=zh-CN&q=tq+{0}&meta=&aq=f&oq=", HttpUtility.UrlEncode(city, System.Text.Encoding.UTF8).ToUpper());

    byte[] bytes = new System.Net.WebClient().DownloadData(url);

    string html = System.Text.Encoding.Default.GetString(bytes);

    int a = html.IndexOf("<div style=\"float:left\">");

    if (a > 0)

    {

        a += 24;

        int b = html.IndexOf("</td></tr></table></div>", a);

        if (b > a)

        {

            Response.Write(html.Substring(a, b - a).Replace("src=\"/", "src=\"http://www.google.cn/"));

            return;

        }

    }

}