android客户端无法下载PDF的问题

Question

部门的一个项目，我的任务是负责为移动终端提供数据。
数据本来有PDF,TXT.DOC格式的文档，然后现在TXT的没问题，PDF的下载就出现异常。代码如下：            WebClient wb = new WebClient( );            byte[] bytes = wb.DownloadData(attachFullName);            this._context.Response.Clear();
            this._context.Response.BufferOutput = true;
            this._context.Response.Buffer = false;
            this._context.Response.Charset = "GB2312";
            this._context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            
            //通知浏览器下载文件而不是打开
            //this._context.Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(attCName, System.Text.Encoding.UTF8));
            this._context.Response.AddHeader("Content-Disposition", "inline;filename=" + HttpUtility.UrlEncode(attCName, System.Text.Encoding.UTF8));
            string fileType = attCName.EndsWith("txt") == true ? "txt" : attCName.EndsWith("pdf") == true ? "pdf" : attCName.EndsWith("doc") == true ? "word" : "pdf";
            switch (fileType)
            {
                case "pdf":
                    {
                        this._context.Response.ContentType = "application/pdf";
                        break;
                    }
                case "word":
                    {
                        this._context.Response.ContentType = "application/msword";
                        break;
                    }
                case "txt":
                default:
                    {
                        this._context.Response.ContentType = "text/plain";
                        break;
                    }
            }
            //this._context.Response.ContentType = "application/octet-stream";
            this._context.Response.BinaryWrite(bytes);
            this._context.Response.Flush( );
            this._context.Response.Close( );异常的详细信息是：System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at WBS.KingtonNewsMobileWeb.NewsDetailsDownloadHandler.DownLoadFile()
   at WBS.KingtonNewsMobileWeb.NewsDetailsDownloadHandler.ProcessRequest(HttpContext context)
在线等急救啊。

Answer 1

还有一个这样的报错：System.Web.HttpException: The remote host closed the connection. The error code is 0x80072746.
   at System.Web.Hosting.ISAPIWorkerRequestInProcForIIS6.FlushCore(Byte[] status, Byte[] header, Int32 keepConnected, Int32 totalBodySize, Int32 numBodyFragments, IntPtr[] bodyFragments, Int32[] bodyFragmentLengths, Int32 doneWithSession, Int32 finalStatus, Boolean& async)
   at System.Web.Hosting.ISAPIWorkerRequest.FlushCachedResponse(Boolean isFinal)
   at System.Web.HttpResponse.Flush(Boolean finalFlush)
   at System.Web.HttpResponse.BinaryWrite(Byte[] buffer)
   at WBS.KingtonNewsMobileWeb.NewsDetailsDownloadHandler.DownLoadFile()
   at WBS.KingtonNewsMobileWeb.NewsDetailsDownloadHandler.ProcessRequest(HttpContext context)

Answer 2

问题解决了。
有2个注意点：
1.iPhone的客户端和Android的客户端的处理方式有所不同。PDF的文件，iPhone可以直接打开，android就只能先下载。
2.WebClient下载文件时，设置格式为 GB2312