protected virtual async Task BuildCommandBody(IAsyncCommand command)
{
await ExceptionGuard.Guard(this,
async() =>
{
if (ShouldNotifyAboutLongOperation)
{
NotifyAboutLongOperationStarted();
}
CommandBeingExecuted = true;
while (InvokeBeforeCommandExecutedTaskQueue.Count > 0)
{
await Task.Run(InvokeBeforeCommandExecutedTaskQueue.Dequeue());
}
command.RaiseCanExecuteChanged();
await ExecuteCommandAction();
},
async() =>
{
if (ShouldNotifyAboutLongOperation)
{
NotifyAboutLongOperationFinished();
}
CommandBeingExecuted = false;
command.RaiseCanExecuteChanged();
Finally();
while (InvokeAfterCommandExecutedTaskQueue.Count > 0)
{
await Task.Run(InvokeAfterCommandExecutedTaskQueue.Dequeue());
}
}
);
}
public IAsyncGuardedCommandBuilder EnqueueBeforeCommandExecuted(Action taskToInvoke)
{
InvokeBeforeCommandExecutedTaskQueue.Enqueue(taskToInvoke);
return(this);
}