//请求 string uri = http://www.baidu.com; HttpWebRequest request = HttpWebRequest.Create(uri) as HttpWebRequest; request.Method = "GET";                            //请求方法 request.ProtocolVersion = new Version(1, 1);   //Http/1.1版本 //Add Other ...

HttpWebResponse response=                 request.GetResponse() as HttpWebResponse;   //Header   foreach (var item in response.Headers)    {     this.txt_Header.Text += item.ToString()+": " +       response.GetResponseHeader  (item.ToString())     + System.Environment.NewLine;  }    //如果主体信息不为空，则接收主体信息内容   if (response.ContentLength <= 0)      return;   //接收响应主体信息   using(Stream stream =response.GetResponseStream())   {     int totalLength=(int)response.ContentLength;     int numBytesRead=0;     byte[] bytes=new byte[totalLength+1024];    //通过一个循环读取流中的数据，读取完毕，跳出循环     while( numBytesRead < totalLength  )     {      int num=stream.Read(bytes,numBytesRead,1024);  //每次希望读取1024字节      if( num==0 )   //说明流中数据读取完毕        break;      numBytesRead+=num;     }  }   //将接收到的主体数据显示到界面   string content=Encoding.UTF8.GetString(bytes);   this.txt_Content.Text=content;

//... string url="http://xx.xxx/xx.jpg";  //图片资源的url //... using (Stream stream = response.GetResponseStream())   {    //当前时间作为文件名    string fileName = DateTime.Now.ToString("yyyyMMddhhmmss")+".jpg";    using (Stream fsStream = new FileStream(fileName, FileMode.Create))    {       stream.CopyTo(fsStream);    } }