Report on progress bar of download file

Question

Hi,

I have progress bar control, i got from API the content stream response.

How i can report on progress of download process of file in the UI page?

Thanks,

try
{
 using (var fileStream = File.Create(zipPathForFolderOrPathForFile))
             contentStream.CopyTo(fileStream);
}
catch(Exception ex)
{
}
finally
{
contentStream.Dispose();
}

Answer 1

instead of using .CopyTo(), you write your own copy with a progress callback:

public void StreamCopy(Stream input, Stream output, Action<int> progressCallback)
{
    int bytesRead = 0;
    byte[] buffer = new byte[1024 * 8]; // 8k buffer 
    while ((var read = input.Read(buffer, 0, buffer.Length)) > 0)
    {
        output.Write (buffer, 0, read);
        bytesRead += read;
        progressCallback(read);
    }
}