/// <summary>
/// Initializes a new instance of <see cref="DelegateCommandAsync{T}"/>.
/// </summary>
/// <param name="executeMethod">Delegate to execute when Execute is called on the command. This can be null to just hook up a CanExecute delegate.</param>
/// <param name="canExecuteMethod">Delegate to execute when CanExecute is called on the command. This can be null.</param>
/// <exception cref="ArgumentNullException">When both <paramref name="executeMethod"/> and <paramref name="canExecuteMethod"/> ar <see langword="null" />.</exception>
public DelegateCommandAsync(Func <CancellationToken, Task> executeMethod, Func <bool> canExecuteMethod)
: base()
{
if (executeMethod == null || canExecuteMethod == null)
{
throw new ArgumentNullException(nameof(executeMethod), "DelegateCommand Delegates Cannot Be Null");
}
cancelCommand = new CancelTaskCommand();
this.executeMethod = executeMethod;
this.canExecuteMethod = canExecuteMethod;
}
public ObservableTask(Func <CancellationToken, Task> executeMethod)
{
CancelCommand = new CancelTaskCommand();
Task = executeMethod(CancelCommand.Token);
TaskCompletion = WatchTaskAsync(Task);
}
