public static async Task CopyStream(Stream from, Stream to, CancellationToken cancelToken, PauseToken pauseToken, Action <long> progress)
{
int buffer_size = 10240;
byte[] buffer = new byte[buffer_size];
long total_read = 0;
while (total_read < from.Length)
{
cancelToken.ThrowIfCancellationRequested();
await pauseToken.WaitWhilePausedAsync();
int read = await from.ReadAsync(buffer, 0, buffer_size);
await to.WriteAsync(buffer, 0, read);
total_read += read;
progress(total_read);
}
}
public static async Task CopyFiles(Dictionary <string, string> files, CancellationToken cancelToken, PauseToken pauseToken, Action <double> progressCallback)
{
long total_size = files.Keys.Select(x => new FileInfo(x).Length).Sum();
long total_read = 0;
double progress_size = 10000.0;
foreach (var item in files)
{
long total_read_for_file = 0;
var from = item.Key;
var to = item.Value;
using (var outStream = new FileStream(to, FileMode.Create, FileAccess.Write, FileShare.Read))
{
using (var inStream = new FileStream(from, FileMode.Open, FileAccess.Read, FileShare.Read))
{
await CopyStream(inStream, outStream, cancelToken, pauseToken, x =>
{
total_read_for_file = x;
progressCallback(((total_read + total_read_for_file) / (double)total_size) * progress_size);
});
}
}
total_read += total_read_for_file;
}
}