C#开发短信发送

//需要用到的命名空间

using System.Net;
using System.IO;
using System.Text;
//调用时只需要把拼成的URL传给该函数即可。判断返回值即可
public string GetHtmlFromUrl(string url)
{
string strRet = null;

if(url==null || url.Trim().ToString()=="")
{
return strRet;
}
string targeturl = url.Trim().ToString();
try
{
HttpWebRequest hr = (HttpWebRequest)WebRequest.Create(targeturl);
hr.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
hr.Method = "GET";
hr.Timeout = 30 * 60 * 1000;
WebResponse hs = hr.GetResponse();
Stream sr = hs.GetResponseStream();
StreamReader ser = new StreamReader(sr, Encoding.Default);
strRet = ser.ReadToEnd(); 
}
catch (Exception ex)
{
strRet = null;
}
return strRet;
}

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