怎么向浏览器输出远程服务器上的文件呢？

Question

FileStream fs = new FileStream(filePath, FileMode.Open);
            byte[] bytes = new byte[(int)fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();这些替换成使用webclient或者httpwebrequest方式下载文件或者文件服务器开共享，在iis将这个共享目录作为虚拟路径挂在你的网站下。

Answer 1

webclient httpwebrequest 百度了一下，似乎都是先在服务器本地中转了一道难道是我搜的不对？

Answer 2

/// <summary>          
        /// 下载文件          
        /// </summary>          
        /// <param name="URL">下载文件地址</param>         
        /// <param name="Filename">下载后的存放地址</param>                 
        public string DownloadFile(string URL, string filename)
        {
            try
            {
                System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)
                System.Net.HttpWebRequest.Create(URL);
                System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
                long totalBytes = myrp.ContentLength;
                if (myrp.ContentLength != 0)
                {  
                    System.IO.Stream st = myrp.GetResponseStream();
                    //System.IO.Stream so = new System.IO.FileStream(filename,System.IO.FileMode.Create);                    Response.Clear();
                    long totalDownloadedByte = 0;
                    byte[] by = new byte[1024];
                    int osize = st.Read(by, 0, (int)by.Length);
                    Response.ContentType = "application/octet-stream";
                    Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(filename));
                    while (osize > 0)
                    {
                        totalDownloadedByte = osize + totalDownloadedByte;
                        Response.OutputStream.Write(by, 0, osize);
                        Response.Flush();
                        //so.Write(by, 0, osize);
                        osize = st.Read(by, 0, (int)by.Length);
                    }
                    Response.Close();                    //long totalDownloadedByte = 0;
                    //byte[] by = new byte[1024];
                    //int osize = st.Read(by, 0, (int)by.Length);
                    //while (osize > 0)
                    //{
                    //    totalDownloadedByte = osize + totalDownloadedByte;
                    //    so.Write(by, 0, osize);
                    //    osize = st.Read(by, 0, (int)by.Length);
                    //}
                    //so.Close();
                    st.Close();
                    return "success";
                }
                else
                {
                    return "文件不存在";
                }
            }
            catch (System.Exception e)
            {
                return "下载文件失败！" + e.ToString();
            }
        } 注释了的代码是本地处理方式

Answer 3

在stackoverflow找到合适的方法了http://stackoverflow.com/questions/5596747/download-stream-file-from-url-asp-net

Answer 4

webclient httpwebrequest 百度了一下，似乎都是先在服务器本地中转了一道难道是我搜的不对？难道FileStream不是？