查询url文件流

Question

            string StrUrl = "http://img.bimg.126.net/photo/c7bckFJxdJxSwQLIy76HTQ==/1755840904721658663.jpg"; 
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);
            System.IO.Stream ns = request.GetResponse().GetResponseStream();
            ns.Seek(0, SeekOrigin.Begin);提示:此流不支持查询操作。有什么办法能使它支持查询操作

Answer 1

看看对你有用没？不知道你想干嘛，流的查找，请参阅msdn的stream
        private string HttpRequestFun(string url, int port)
        {
            string html = "";
            try
            {
                WebRequest req = WebRequest.Create(url);
                req.Method = "POST";   //指定提交的Method，可以为POST和GET，一定要大写                   byte[] postData = System.Text.Encoding.GetEncoding("utf-8").GetBytes("?param1=aaa&param2=bbb");//Post的数据                   req.ContentLength = postData.Length;
                Stream postStream = req.GetRequestStream();
                postStream.Write(postData, 0, postData.Length);
                postStream.Close();                WebResponse res = req.GetResponse();                System.Text.Encoding resEncoding = System.Text.Encoding.GetEncoding("utf-8");//接收的编码   
                StreamReader reader = new StreamReader(res.GetResponseStream(), resEncoding);                html = reader.ReadToEnd();     //接收的Html                   reader.Close();
                res.Close();
            }
            catch (Exception e2)
            {
                html += e2.Message;
            }            return html;
        }

Answer 2

byte[] bytes = new byte[ns.Length];
stream.Read(bytes, 0, bytes.Length);
stream.Seek(0, SeekOrigin.Begin);

Answer 3

HttpWebRequest   myReq   =   (HttpWebRequest)HttpWebRequest.Create(strUrl);   
string filepath= "";
int   start   =   strUrl.LastIndexOf("/",strUrl.Length);   
string filename   =   strUrl.Substring(start,strUrl.Length - start);   
HttpWebResponse   HttpWResp=(HttpWebResponse)myReq.GetResponse();   
StreamReader   sr=new StreamReader(HttpWResp.GetResponseStream(),System.Text.Encoding.Default);   
StreamWriter   sw   =   new   StreamWriter(filepath+filename);   
sw.Write(sr.ReadToEnd());   
sw.Close();   
sr.Close();