How to download an image from web showing the progress of the download in c# using winforms? -


I asynchronously from WebRequest download an image from a URL using like this: 

  Public Zero Downloads (String URL) {Byte [buffer = new byte [0x1000]; WebRequest request = HttpWebRequest.Create (url); request. Method = "received"; Request.ContentType = "Image / GIF"; Request.BeginGetResponse (result => {WebRequest webRequest = result.AsyncState as WebRequest; WebResponse response = webRequest.EndGetResponse (results); READSTATE READSTATE = new READSTATE () {Response = response.GetResponseStream (), AccumulatedResponse = New MemoryStream ( ), buffer = buffer,}; readState.Response.BeginRead (buffer, 0, readState.Buffer.Length, ReadCallback, READSTATE);}, request); } Public Zero ReadCallback (IAsyncResult result) {READSTATE READSTATE = result.AsyncState as READSTATE; Int bytes read = readant. response. And Red (result); If (bytesRead & gt; 0) {readState.AccumulatedResponse.BeginWrite (readState.Buffer, 0, bytesRead, writeResult = & gt; {readState.AccumulatedResponse.EndWrite (writeResult); readState.Response.BeginRead (readState.Buffer, 0, READSTATE. Buffer, length, readclack, redtest);}, tap); } And {readState.AccumulatedResponse.Flush (); ReadState.Response.Close (); PictureBox1.Image = Image.FromStream (readState.AccumulatedResponse); }} Public class ReadState {public stream response {get; Set; } Received public stream receipts; Set; } Public byte [] Buffer {Received; Set; }} Does

And it works fine, but I want the browser, and show the progress of the download is not as it turns to show only.

If I << p> 

  pictureBox1.Image = Image.FromStream (readState.AccumulatedResponse);

I get an exception before the end that the image is not valid, even if there is some data in it. Is there any way to show partial data?

A special encoding mode JPEG called "Progressive JPEG" in which data sequentially over Many of the expansions are narrowed in near. This is for Windows 7.


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