我正在尝试通过DialogService实现应用程序中处理多个视图/窗口的“MVVM推荐”方式。然而,在实现显示子视图后关闭父视图时遇到了困难。这是我的实现方式。在WPF MVVM中,处理这种情况的最佳策略是什么?
DialogService.cs(我尝试使它通用,以便可以显示和关闭任何窗口)
显示子视图的视图模型是SelectPackageViewModel.cs。
父视图是SelectPackage.cs。子视图是CreatePackage.cs。
DialogService.cs(我尝试使它通用,以便可以显示和关闭任何窗口)
public class DialogService : IDialogService
{
/// <summary>
/// Closes the specified window screen
/// </summary>
/// <param name="dialogWindow"></param>
public void CloseDialog(Window dialogWindow)
{
if ( dialogWindow != null )
dialogWindow.Close ( );
}
/// <summary>
/// Shows the specified window screen
/// </summary>
/// <param name="dialogWindow"></param>
public void ShowDialog(Window dialogWindow)
{
if ( dialogWindow != null )
dialogWindow.ShowDialog ( );
}
}
显示子视图的视图模型是SelectPackageViewModel.cs。
public SelectPackageViewModel(IPackageDataService packageDataService, IDialogService dialogService)
{
this.packageDataService = packageDataService;
this.dialogService = dialogService;
LoadPackages();
LoadCommands();
}
private void LoadCommands()
{
CreateNewCommand = new CustomCommand(CreateNewPackage);
}
private void CreateNewPackage(object obj)
{
dialogService.ShowDialog(new CreatePackage());
}
父视图是SelectPackage.cs。子视图是CreatePackage.cs。
<Button Name="btnNewPackage"
Content="New..."
HorizontalAlignment="Center"
Width="120"
Height="30"
FontSize="15" FontWeight="Bold"
Margin="10"
Command="{Binding CreateNewCommand}"/>