/// <summary>
/// метод расширения для IViewModel, отображающий заставку
/// </summary>
/// <param name="iViewModel">расширяемый тип</param>
/// <param name="pageToShow">отображаемая заставка</param>
/// <param name="milliseconds">время показа заставки</param>
/// /// <param name="pageToChange">страница, которая загрузится после заставки</param>
public static async void ChangePageWithDialog(this IViewModel iViewModel, IViewModel pageToShow, int milliseconds, IViewModel pageToChange = null)
{
ServiceLocator.Default.ResolveType <IUIVisualizerService>().Show(pageToShow);
Thread.Sleep(milliseconds);
// если нужно - переходим на другую страницу
if (pageToChange != null)
{
((MainWindowViewModel)iViewModel).ChangeCurrentPage(pageToChange);
}
await pageToShow.CloseViewModelAsync(true);
}
/// <summary>
/// Cancels the editing of the data, but also closes the view model in the same call.
/// </summary>
/// <returns><c>true</c> if successful; otherwise <c>false</c>.</returns>
public static async Task <bool> CancelAndCloseViewModelAsync(this IViewModel viewModel)
{
Argument.IsNotNull("viewModel", viewModel);
var result = await viewModel.CancelViewModelAsync();
if (result)
{
await viewModel.CloseViewModelAsync(false);
}
return(result);
}
/// <summary>
/// Cancels the editing of the data, but also closes the view model in the same call.
/// </summary>
/// <returns><c>true</c> if successful; otherwise <c>false</c>.</returns>
public static async Task <bool> CancelAndCloseViewModelAsync(this IViewModel viewModel)
{
Argument.IsNotNull("viewModel", viewModel);
var viewModelBase = viewModel as ViewModelBase;
if (viewModelBase != null)
{
var exitAfterBlock = false;
if (viewModelBase.IsCanceling)
{
exitAfterBlock = true;
if (!await viewModelBase.AwaitCancelingAsync())
{
return(false);
}
}
if (viewModelBase.IsClosing)
{
exitAfterBlock = true;
await viewModelBase.AwaitClosingAsync();
}
if (exitAfterBlock)
{
return(true);
}
}
var result = await viewModel.CancelViewModelAsync();
if (result)
{
await viewModel.CloseViewModelAsync(false);
}
return(result);
}
private async void OnExitCommandExecute()
{
await _parentViewModel.CloseViewModelAsync(true);
}