public static async Task DownloadFileTaskAsync(this WebClient client, string url, string filepath, CancellationToken cancellationToken, IProgress<DownloadDataProgress> progress)
{
using (var s = await client.OpenReadTaskAsync(url))
{
long totalBytes = 0;
Int64.TryParse(client.ResponseHeaders[HttpResponseHeader.ContentLength], out totalBytes);
using (var fs = File.Open(filepath, FileMode.Create, FileAccess.Write, FileShare.Read))
{
var cprogress = new Progress<StreamCopyProgress>();
cprogress.ProgressChanged += new EventHandler<StreamCopyProgress>((sender, e) =>
{
var r = new DownloadDataProgress(e, totalBytes);
r.UserState = e.UserState;
progress.Report(r);
});
await s.CopyToAsync(fs, cancellationToken, cprogress);
}
}
}
public static async Task<byte[]> DownloadDataTaskAsync(this WebClient client, string url, CancellationToken cancellationToken, IProgress<DownloadDataProgress> progress)
{
using (var s = await client.OpenReadTaskAsync(url))
{
long totalBytes = 0;
Int64.TryParse(client.ResponseHeaders[HttpResponseHeader.ContentLength], out totalBytes);
using (var mso = new MemoryStream())
{
var cprogress = new Progress<StreamCopyProgress>();
cprogress.ProgressChanged += new EventHandler<StreamCopyProgress>((sender, e) =>
{
var r = new DownloadDataProgress(e, totalBytes);
r.UserState = e.UserState;
progress.Report(r);
});
await s.CopyToAsync(mso, cancellationToken, cprogress);
return mso.ToArray();
}
}
}
