/// <summary>
/// Show toast notification when a file is downloaded.
/// </summary>
async void FTPItem_DownloadCompleted(object sender, FTP.DownloadCompletedEventArgs e)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
if (e.Error == null)
{
progressInfo.Items.Insert(0, string.Format("{0} is completed.",
e.RequestFile.ToString()));
}
else
{
progressInfo.Items.Insert(0, string.Format("{0} is not completed: {1}.",
e.RequestFile.ToString(),
e.Error.Message));
}
progressInfo.SelectedIndex = 0;
}
);
}
/// <summary>
/// Download a single file from FTP server using WebRequest.
/// </summary>
public static async Task <DownloadCompletedEventArgs> DownloadFTPFileAsync(FTPFileSystem item,
StorageFile targetFile, ICredentials credential)
{
var result = new DownloadCompletedEventArgs
{
RequestFile = item.Url,
LocalFile = targetFile,
Error = null
};
// This request is FtpWebRequest in fact.
WebRequest request = WebRequest.Create(item.Url);
if (credential != null)
{
request.Credentials = credential;
}
request.Proxy = WebRequest.DefaultWebProxy;
// Set the method to Download File
request.Method = "RETR";
try
{
// Open the file for write.
using (IRandomAccessStream fileStream =
await targetFile.OpenAsync(FileAccessMode.ReadWrite))
{
// Get response.
using (WebResponse response = await request.GetResponseAsync())
{
// Get response stream.
using (Stream responseStream = response.GetResponseStream())
{
byte[] downloadBuffer = new byte[2048];
int bytesSize = 0;
// Download the file until the download is completed.
while (true)
{
// Read a buffer of data from the stream.
bytesSize = responseStream.Read(downloadBuffer, 0,
downloadBuffer.Length);
if (bytesSize == 0)
{
break;
}
// Write buffer to the file.
await fileStream.WriteAsync(downloadBuffer.AsBuffer());
}
}
}
}
}
catch (Exception ex)
{
result.Error = ex;
}
return(result);
}