js跨域和ajax 跨域问题的实现思路_javascript技巧

public string GetUrlData(string url)
{
System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
System.Net.WebResponse webResponse = webRequest.GetResponse();
System.IO.Stream iStream = webResponse.GetResponseStream();
System.IO.StreamReader sr = new System.IO.StreamReader(iStream, System.Text.Encoding.Default);
string str = sr.ReadToEnd();
sr.Close();
iStream.Close();
webResponse.Close();
return str;
}

URL url = new URL("http://www.jb51.net/index.html");
FilterInputStream f=(FilterInputStream)url.openStream();