File upload read progress bar and breakpoint download for. NET Web sites

Progress read when the file is uploaded to the server

 Upfileresult result = new Upfileresult ();     try {//Pre-read the file into memory, while calculating the upload progress IServiceProvider Provider = (IServiceProvider) httpcontext.current;         Returns the portion of the HTTP request body that has been read. HttpWorkerRequest request = (HttpWorkerRequest) provider.     GetService (typeof (HttpWorkerRequest)); Gets the upload size long length = long. Parse (Request.     Getknownrequestheader (httpworkerrequest.headercontentlength));     Checkfilesize (length, info); int bytesread = 0;          Read data size int read;  The size of the currently read block int count = 8192;     chunking size byte[] buffer;     Save all uploaded data byte[] tempbuff = null; if (Request! = null) {Tempbuff = Request.     Getpreloadedentitybody ();         } if (Tempbuff! = null) {buffer = new byte[length];         Chunked size count = tempbuff.length;         Copy the uploaded data past buffer.blockcopy (tempbuff, 0, Buffer, Bytesread, Count);         Start recording uploaded size bytesread = Tempbuff.length; Calculates the percentage of the currently uploaded file longPercent = Bytesread * 100/LENGTH;         Setpercent (SessionId, percent);         int II = 0; Loop block reads until all data is read over while (request. IsClientConnected () &&!request.                    isentireentitybodyispreloaded () && bytesread < length) {//If the last chunk size is less than the tile size, then the block is re-chunked                 if (Bytesread + count > Length) {count = (int) (length-bytesread);             Tempbuff = new Byte[count]; }//chunked reads read = Request.             Readentitybody (Tempbuff, Count);             Copy the read data block Buffer.blockcopy (tempbuff, 0, Buffer, bytesread, read);             Record uploaded size Bytesread + = read;             ii++;                 if (ii 10 = = 0) {//calculates the percentage of the currently uploaded file percent = Bytesread * 100/LENGTH;             Setpercent (SessionId, percent); } if (read = = 0) {//If the file was previously read(360 validation in global.asax), where data is not available, you need to avoid entering the dead loop break; }} if (Request. IsClientConnected () &&!request. Isentireentitybodyispreloaded ()) {//Incoming data uploaded//bindingflags bindingflags = B Indingflags.instance |             BindingFlags.NonPublic; Type type = Request.             GetType (); while ((type! = NULL) && (type. FullName = "System.Web.Hosting.ISAPIWorkerRequest")) {type = type.             BaseType; } if (type! = NULL) {type. GetField ("_contentavaillength", BindingFlags). SetValue (request, buffer.                 Length); Type. GetField ("_contenttotallength", BindingFlags). SetValue (request, buffer.                 Length); Type. GetField ("_preloadedcontent", BindingFlags).                 SetValue (request, buffer); Type. GetField ("_preloadedcontentread", BindingFlags).             SetValue (Request, true);   }//Indicates that the upload has ended         }} httppostedfile Imgfile = _request.     Files[0];     string fileName = Imgfile.filename;     UploadFile (result, Imgfile, FileName, info, SessionId);     Setpercent (SessionId, 100); return result; } catch (Exception ex) {result.     IsOk = false; Result. ErrMsg = ex.     Message; return result; }

Breakpoint download for server file

<summary>///support Breakpoint Download//</summary>///<param name= "Request" ></param>///<param name= " Response "></param>///<param name=" FilePath "> The Physical Address of the file </param>private void down (HttpRequest Request, HttpResponse Response, String filePath) {/* Breakpoint download is not the same as normal mode: Add a Property range:bytes=100000-response header to the requested header information for the breakpoint download Adds an attribute content-range=bytes 100000-19999/20000 returns a status code of 206 (Partial Content) that represents the first 500 bytes: range:bytes=0-499 represents the Two x 500 bytes: range:bytes=500-999 represents the last 500 bytes: range:bytes=-500 represents the range after 500 bytes: range:bytes=500-First and last byte: range:bytes= 0-0,-1 specify several ranges simultaneously: range:bytes=500-600,601-999 *///Open file using (Stream FileStream = new FileStream (FilePath, Fi        Lemode.open, FileAccess.Read, FileShare.Read)) {//Get file size long fileSize = filestream.length;        String range = request.headers["range"];        Response.Clear ();        Response.AddHeader ("accept-ranges", "bytes"); Response.AddHeader ("Connection", "Keep-alIve ");        Response.Buffer = false; Packet size int pack = 10240;        10Kb int sleep = 0; if (this. Speed.hasvalue) {sleep = (int) math.floor (1000.0 * 10/this.        Speed.value);        } long begin = 0;        Long end = FileSize-1; if (!string. IsNullOrEmpty (range)) {//Gets the scope of the request, if there are multiple scopes, temporarily processing only the first, range:bytes=500-600,601-999 range = Range .            Replace ("bytes=", "" "); Range = range.            Split (', ') [0]; string[] Region = range.            Split ('-'); String startPoint = Region[0].            Trim (); String endPoint = Region[1].            Trim (); if (StartPoint = = "") {long.                TryParse (EndPoint, out end);                begin = Filesize-end;            end = FileSize-1; } else if (EndPoint = = "") {long.                TryParse (StartPoint, out begin);            end = FileSize-1;            } else {    Long.                TryParse (StartPoint, out begin); Long.            TryParse (EndPoint, out end);            } response.statuscode = 206; Response.AddHeader ("Content-range", String.        Format ("bytes {0}-{1}/{2}", Begin, End, fileSize));        }//Byte stream to return data Response.ContentType = "Application/octet-stream";        response.contentencoding = System.Text.Encoding.UTF8; Response.AddHeader ("Content-disposition", "attachment; Filename=\ "" + Httputility.urlencode (Request.ContentEncoding.GetBytes (this.        FileName) + "\" ");        Long size = End-begin + 1; Response.AddHeader ("Content-length", size.        ToString ());        Create a bit array byte[] buffer = new Byte[pack];    Filestream.position = begin; Set the current stream position//When the file size is greater than 0 is into the loop while (Size > 0) {//Determines whether the client is still connected to the server if (Response .                isclientconnected) {//Gets the total number of bytes in the buffer.      int length = filestream.read (buffer, 0, pack);          Write Data Response.OutputStream.Write (buffer, 0, length);                Sends the output of the buffer to the client Response.Flush ();                Buffer = new Byte[pack];                size = Size-length;                if (Sleep > 0) {thread.sleep (sleep);            }} else {//when the user disconnects and exits the loop size =-1; }        }    }}

File breakpoint upload, pending additions

File upload read progress bar and breakpoint download for. NET Web sites