/// <summary>
/// Outputs an asynchronous operation.
/// When the operation completes, a MSPdfModel object, representing the PDF, is returned.
/// </summary>
/// <param name="pdfStorageFile">The PDF file</param>
/// <returns></returns>
public static async Task<MSPdfModel> LoadFromFile(StorageFile pdfStorageFile)
{
MSPdfModel msPdf = new MSPdfModel();
try
{
// Try to load the file without a password
msPdf.PdfDoc = await PdfDocument.LoadFromFileAsync(pdfStorageFile);
}
catch
{
// Ask the user to enter password
PasswordContentDialog passwordDialog = new PasswordContentDialog();
bool failedToLoad = false;
if (await passwordDialog.ShowAsync() == ContentDialogResult.Primary)
{
// Try to load the file with a password
try
{
msPdf.PdfDoc = await PdfDocument.LoadFromFileAsync(pdfStorageFile, passwordDialog.Password);
// Store the password of the file
msPdf.Password = passwordDialog.Password;
msPdf.isPasswordProtected = true;
}
catch (Exception ex)
{
// Failed to load the file
App.NotifyUser(typeof(ViewerPage), "Failed to open the file.\n" + ex.Message, true);
failedToLoad = true;
}
}
else
{
// User did not enter a password
failedToLoad = true;
}
// Return null if failed to load the file
if (failedToLoad)
{
return null;
}
}
return msPdf;
}
public async Task ReloadFile()
{
msPdf = await MSPdfModel.LoadFromFile(pdfFile);
}
