/// <summary>
/// Converts attachments to AttachedFile(s)
/// </summary>
/// <param name="message"></param>
private async void HandleAttachmentsAsync(MimeMessage message)
{
byte[] byteArray;
//If Attachments is not empty
if (message.Attachments.Count() != 0)
{
AttachedFilesListView.Visibility = Visibility.Visible;
foreach (var attachment in message.Attachments)
{
var fileName = attachment.ContentDisposition?.FileName ?? attachment.ContentType.Name;
byteArray = HelperUtils.ConvertAttachmentToByteArray(attachment);
if (byteArray == null)
{
DisplayErrorDialog("Attachment error", "Error displaying attachments");
return;
}
//Converts byte[] to StorageFile
StorageFile storageFile = await HelperUtils.ConvertsToStorageFileAsync(byteArray, fileName);
if (storageFile != null)
{
//Creates new AttachedFile and adds it to AttachedFileList
AttachedFileList.Add(new AttachedFile
{
FileName = storageFile.Name,
Thumbnail = await storageFile.GetThumbnailAsync(ThumbnailMode.ListView)
});
}
}
}
else
{
//Makes the listview invisible, since there are no attachments to show
AttachedFilesListView.Visibility = Visibility.Collapsed;
}
}
/// <summary>
/// Saves the selected attachment to file
/// </summary>
private async Task <bool> SaveAttachment()
{
if (SelectedIndex != -1)
{
byte[] byteArray;
List <MimeEntity> list = CurrentMessage.Attachments.ToList();
var attachment = list[SelectedIndex];
var fileName = attachment.ContentDisposition?.FileName ?? attachment.ContentType.Name;
//Converts the attachment to a byte array
byteArray = HelperUtils.ConvertAttachmentToByteArray(attachment);
if (byteArray == null)
{
return(false);
}
var savePicker = new Windows.Storage.Pickers.FileSavePicker();
savePicker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.Desktop;
//Gets file extension
int index = fileName.LastIndexOf(".");
string fileType = fileName.Substring(index);
savePicker.FileTypeChoices.Add(fileType.Substring(1), new List <string>()
{
fileType
});
savePicker.DefaultFileExtension = fileType;
savePicker.SuggestedFileName = fileName;
//Lets the user choose how to save the file
StorageFile file = await savePicker.PickSaveFileAsync();
if (file != null)
{
Windows.Storage.CachedFileManager.DeferUpdates(file);
//Writes byte array to Storagefile
await Windows.Storage.FileIO.WriteBytesAsync(file, byteArray);
Windows.Storage.Provider.FileUpdateStatus status =
await Windows.Storage.CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
return(true);
}
else
{
Debug.WriteLine("File " + file.Name + " couldn't be saved");
return(false);
}
}
else
{
Debug.WriteLine("Operation cancelled");
return(false);
}
}
else
{
return(false);
}
}