private async void btnSaveFile_Click(object sender, RoutedEventArgs e)
{
Person person = new Person();
// Convert user input to a person object
try
{
person.FirstName = this.tbxFirstName.Text;
person.LastName = this.tbxLastName.Text;
person.Age = Int32.Parse(this.tbxAge.Text);
person.City = this.tbxCity.Text;
}
catch
{
var messageDialog = new MessageDialog("Invalid data, try again.");
await messageDialog.ShowAsync();
return;
}
var savePicker = new Windows.Storage.Pickers.FileSavePicker();
savePicker.SuggestedStartLocation =
Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary;
// Dropdown of file types the user can save the file as
savePicker.FileTypeChoices.Add(".json", new List <string>()
{
".json"
});
savePicker.FileTypeChoices.Add(".csv", new List <string>()
{
".csv"
});
savePicker.FileTypeChoices.Add(".xml", new List <string>()
{
".xml"
});
savePicker.FileTypeChoices.Add(".txt", new List <string>()
{
".txt"
});
savePicker.SuggestedFileName = "New Document";
StorageFile file = await savePicker.PickSaveFileAsync();
if (file != null)
{
// Prevent updates to the remote version of the file until
// we finish making changes and call CompleteUpdatesAsync.
CachedFileManager.DeferUpdates(file);
WriteService.WriteToFile(file, person);
// Let Windows know that we're finished changing the file so
// the other app can update the remote version of the file.
// Completing updates may require Windows to ask for user input.
Windows.Storage.Provider.FileUpdateStatus status =
await CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
this.tbStatus.Text = "File " + file.Name + " was saved.";
}
else
{
this.tbStatus.Text = "File " + file.Name + " couldn't be saved.";
}
}
else
{
this.tbStatus.Text = "Operation cancelled.";
}
}
