FineUI 官方论坛

标题: appbpx框架下下载文件的代码不起作用 [打印本页]

作者: vrwqq 时间: 2012-10-1 11:15
标题: appbpx框架下下载文件的代码不起作用
如题，哪位能指点一下，谢谢！具体代码如下：
public static bool DownloadFile( string sUrl, string clientFileName)
      {

         string filePath = HttpContext.Current.Server.MapPath(sUrl);//路径
         FileInfo fileInfo = new FileInfo(filePath);
         FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
         BinaryReader binReader = new BinaryReader(fileStream);
         try
         {

            if (fileInfo.Exists)
            {
                  long startBytes = 0;
                  string lastUpdateTiemStamp = File.GetLastWriteTimeUtc(filePath).ToString("r");
                  string _EncodedData = HttpUtility.UrlEncode(clientFileName, Encoding.UTF8) + lastUpdateTiemStamp;
                  HttpContext.Current.Response.Clear();
                  HttpContext.Current.Response.Buffer = false;
                  HttpContext.Current.Response.AddHeader("Accept-Ranges", "bytes");
                  HttpContext.Current.Response.AppendHeader("ETag", "\"" + _EncodedData + "\"");
                  HttpContext.Current.Response.AppendHeader("Last-Modified", lastUpdateTiemStamp);
                  HttpContext.Current.Response.ContentType = "application/octet-stream";
                  HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileInfo.Name);
                  HttpContext.Current.Response.AddHeader("Content-Length", (fileInfo.Length - startBytes).ToString());
                  HttpContext.Current.Response.AddHeader("Connection", "Keep-Alive");
                  HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
                  //Send data
                  binReader.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                  //Dividing the data in 1024 bytes package
                  int maxCount = (int)Math.Ceiling((fileInfo.Length - startBytes + 0.0) / 1024);
                  //Download in block of 1024 bytes
                  int i;
                  for (i = 0; i < maxCount && HttpContext.Current.Response.IsClientConnected; i++)
                  {
                     HttpContext.Current.Response.BinaryWrite(binReader.ReadBytes(1024));
                     HttpContext.Current.Response.Flush();
                  }
                  //if blocks transfered not equals total number of blocks
                  if (i < maxCount)
                     return false;
                  return true;
            }
            else
                  return false;
         }
         catch (Exception ex)
         {
            string s = ex.Message;
            return false;
         }
         finally
         {
            HttpContext.Current.Response.End();
            binReader.Close();
            fileStream.Close();
         }

      }

作者: CoolHots 时间: 2012-10-4 05:50
在IIS调试和在VS直接调试，下载的路径是不一样的

欢迎光临 FineUI 官方论坛 (https://fineui.com/bbs/)