How to send canvas image large size from silverlight to WCF service - wcf

Question

I have a large size byte[] formed from silverlight Canvas using following code
var img = new WriteableBitmap(cnvControlHolder, null);
var outStream = new MemoryStream();
EncodeJpeg(img, outStream);
Now I want to send this to WCF service to form image from this byte array & save it as an image on server side so that I can consume it in SSRS. My problem is as the byte[] is big I get the classic Method not found from WCF service.
I read in few links that WCF streaming would be one option, but could not find any sample on the net. My service method is like this:
public bool Upload(Stream image)
{
FileStream fileStream = null;
BinaryWriter writer = null;
var filePath = HttpContext.Current.Server.MapPath(".") + #"\" +
ConfigurationManager.AppSettings["PictureUploadDirectory"] + #"\Diagram.jpeg";// +image.ImageName;
if (image!=null)
{
//return ByteArrayToFile(filePath, image.Imagestream);
fileStream = File.Open(filePath, FileMode.Create);
writer = new BinaryWriter(fileStream);
writer.Write("Diagram.jpeg");
}
return false;
}
and client call is this :
var img = new WriteableBitmap(canvas1, null);
var outStream = new MemoryStream();
EncodeJpeg(img, outStream); //custom library to compress into jpeg
var client = new Service1Client();
client.UploadCompleted += new EventHandler<UploadCompletedEventArgs>(client_UploadCompleted);
client.UploadAsync(outStream.ToArray());
Can somebody suggest some sample or any other solution to fix my issue.

Answer 1

I recently implemented a very similar solution in Silverlight. The solution involves:
Dividing the large byte[] into n chunks of size that can be sent via a web service call
Making a web call to the service, registering a file upload request for n chunks, and requesting a guid from the service.
Making n web calls to the service and uploading each chunk, supplying the guid and the ordinal of the chunk (the chunks may arrive out of sequence).
Once the server receives all n chunks, it combines the chunks and writes the data into a file.
I hope this can help to get you started.