Prism 4.1 如何使用目录扫描加载模块并将它们应用于 mvvm 模式以进行导航
Prism 4.1 How to loading modules with directory scan andapply them to mvvm pattern for navigation
在 prism 4.1 中,我想使用模块加载并使用 mvvm 构建我的项目。
现在我使用目录扫描注册模块,但是在视图模型中无法导航
模块代码
[Module(ModuleName = "ModuleA", OnDemand = true)]
public class ModuleAModule : IModule
{
private IRegionManager RegionManager { get; set; }
private ViewA ViewA;
public ModuleAModule(IRegionManager RegionManager, IUnityContainer container)
{
if (RegionManager != null)
{
this.RegionManager = RegionManager;
}
if (container != null)
{
this.container = container;
}
}
public void Initialize()
{
this.container.RegisterType<object, ViewA>(nameof(ViewA));
IRegion MathRegion = RegionManager.Regions["ContentRegions"];
MathRegion.Add(this.ViewA, "ViewA");
}
}
然后我在 Bootstrapper 中启动
class Bootstrapper : UnityBootstrapper
{
protected override DependencyObject CreateShell()
{
return ServiceLocator.Current.GetInstance<MainWindow>();
}
protected override void InitializeShell()
{
base.InitializeShell();
Application.Current.MainWindow.Show();
}
protected override IModuleCatalog CreateModuleCatalog()
{
return new DirectoryModuleCatalog() { ModulePath = @".\Modules" };
}
}
我在视图模型中是这样写的
class MainWindowViewModel : NotificationObject
{
private readonly IRegionManager _regionManager;
public DelegateCommand<string> NavigateCommand { get; private set; }
public MainWindowViewModel(IRegionManager regionManager)
{
_regionManager = regionManager;
NavigateCommand = new DelegateCommand<string>(Navigate);
}
private void Navigate(string navigatePath)
{
if (navigatePath != null)
_regionManager.RequestNavigate("ContentRegion", new Uri(navigatePath, UriKind.Relative));
}
}
主窗口中的Xaml:
<DockPanel LastChildFill="True">
<StackPanel Orientation="Horizontal" DockPanel.Dock="Top" Margin="5">
<Button Command="{Binding NavigateCommand}" CommandParameter="ViewA" Margin="5">NavigateCommand A</Button>
</StackPanel>
<TabControl prism:RegionManager.RegionName="ContentRegions" Margin="5"/>
</DockPanel>
public MainWindow(IRegionManager region)
{
InitializeComponent();
this.DataContext = new MainWindowViewModel(region);
}
我现在无法使用按钮进行导航,点击后没有任何反应。是不是我注册模块的时候出错了?还是其他原因没有找到模块?
您要注册ViewA
导航,不是立即添加到区域。
即:
container.Register<object, ViewA>( nameof(ViewA) );
然后,在RequestNavigate
时,容器将创建一个新实例,区域管理器会将其放入该区域。
在 prism 4.1 中,我想使用模块加载并使用 mvvm 构建我的项目。 现在我使用目录扫描注册模块,但是在视图模型中无法导航
模块代码
[Module(ModuleName = "ModuleA", OnDemand = true)]
public class ModuleAModule : IModule
{
private IRegionManager RegionManager { get; set; }
private ViewA ViewA;
public ModuleAModule(IRegionManager RegionManager, IUnityContainer container)
{
if (RegionManager != null)
{
this.RegionManager = RegionManager;
}
if (container != null)
{
this.container = container;
}
}
public void Initialize()
{
this.container.RegisterType<object, ViewA>(nameof(ViewA));
IRegion MathRegion = RegionManager.Regions["ContentRegions"];
MathRegion.Add(this.ViewA, "ViewA");
}
}
然后我在 Bootstrapper 中启动
class Bootstrapper : UnityBootstrapper
{
protected override DependencyObject CreateShell()
{
return ServiceLocator.Current.GetInstance<MainWindow>();
}
protected override void InitializeShell()
{
base.InitializeShell();
Application.Current.MainWindow.Show();
}
protected override IModuleCatalog CreateModuleCatalog()
{
return new DirectoryModuleCatalog() { ModulePath = @".\Modules" };
}
}
我在视图模型中是这样写的
class MainWindowViewModel : NotificationObject
{
private readonly IRegionManager _regionManager;
public DelegateCommand<string> NavigateCommand { get; private set; }
public MainWindowViewModel(IRegionManager regionManager)
{
_regionManager = regionManager;
NavigateCommand = new DelegateCommand<string>(Navigate);
}
private void Navigate(string navigatePath)
{
if (navigatePath != null)
_regionManager.RequestNavigate("ContentRegion", new Uri(navigatePath, UriKind.Relative));
}
}
主窗口中的Xaml:
<DockPanel LastChildFill="True">
<StackPanel Orientation="Horizontal" DockPanel.Dock="Top" Margin="5">
<Button Command="{Binding NavigateCommand}" CommandParameter="ViewA" Margin="5">NavigateCommand A</Button>
</StackPanel>
<TabControl prism:RegionManager.RegionName="ContentRegions" Margin="5"/>
</DockPanel>
public MainWindow(IRegionManager region)
{
InitializeComponent();
this.DataContext = new MainWindowViewModel(region);
}
我现在无法使用按钮进行导航,点击后没有任何反应。是不是我注册模块的时候出错了?还是其他原因没有找到模块?
您要注册ViewA
导航,不是立即添加到区域。
即:
container.Register<object, ViewA>( nameof(ViewA) );
然后,在RequestNavigate
时,容器将创建一个新实例,区域管理器会将其放入该区域。