public ProgressDialogWindowViewModel(ProgressDialogWindow owner, ProgressDialogWindow.Options options, Task task)
{
_owner = owner;
_task = task;
_options = options;
CancelCommand = new ProtectedCommand(OnCancelCommand, canExecuteCommand: _options.IsCancellable);
CloseOnTaskCompletion();
owner.Closed += OnOwnerClosed;
}
/// <summary>
/// Prompts the user with the progress dialog and awaits the end of the <seealso cref="Task"/> to close
/// itself.
/// </summary>
/// <param name="task">The <seealso cref="Task"/> instance to show progress for.</param>
/// <param name="options">The options for the dialog.</param>
/// <returns>A task that can be awaited to get the result of the operation.</returns>
public static async Task PromptUserAsync(Task task, Options options)
{
var dialog = new ProgressDialogWindow(task, options);
dialog.ShowModal();
if (!dialog.ViewModel.WasCancelled)
{
// Await the task to get the value it holds or to force it to throw
// the exception it holds if it failed.
await task;
}
}
/// <summary>
/// Prompts the user with the progress dialog and awaits the end of the <seealso cref="Task{TResult}"/> to close
/// itself.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="task">The <seealso cref="Task{TResult}"/> instance to show progress for.</param>
/// <param name="options">The options for the dialog.</param>
/// <returns>A task that can be awaited to get the result of the operation.</returns>
public static async Task <T> PromptUserAsync <T>(Task <T> task, Options options)
{
var dialog = new ProgressDialogWindow(task, options);
dialog.ShowModal();
// Check if the dialog closed because the task completed or because the user cancelled the operation.
if (dialog.ViewModel.WasCancelled)
{
return(default(T));
}
else
{
// Await the task to get the value it holds or to force it to throw
// the exception it holds if it failed.
return(await task);
}
}
