C# Caliburn.Micro+;MEF+;现代用户界面:IContent事件
我已经启动了一个使用Caliburn.Micro和modernui()的项目,在我的视图模型上启动IContent的导航事件时遇到了一些困难。我已经将这两个人连接起来,通过以下方式彼此合作: CM引导程序:C# Caliburn.Micro+;MEF+;现代用户界面:IContent事件,c#,mef,caliburn.micro,modern-ui,wpf-4.5,C#,Mef,Caliburn.micro,Modern Ui,Wpf 4.5,我已经启动了一个使用Caliburn.Micro和modernui()的项目,在我的视图模型上启动IContent的导航事件时遇到了一些困难。我已经将这两个人连接起来,通过以下方式彼此合作: CM引导程序: public class CMBootstrapper : Bootstrapper<IShell> { private CompositionContainer container; private DirectoryCatalog catalog;
public class CMBootstrapper : Bootstrapper<IShell> {
private CompositionContainer container;
private DirectoryCatalog catalog;
public CMBootstrapper() { }
protected override void Configure() {
catalog = new DirectoryCatalog(".", "*.*");
container = new CompositionContainer(catalog);
var compositionBatch = new CompositionBatch();
compositionBatch.AddExportedValue<IWindowManager>(new WindowManager());
compositionBatch.AddExportedValue<IEventAggregator>(new EventAggregator());
compositionBatch.AddExportedValue(container);
container.Compose(compositionBatch);
}
protected override IEnumerable<Assembly> SelectAssemblies() {
List<Assembly> assemblies = new List<Assembly>();
assemblies.Add(Assembly.GetExecutingAssembly());
return assemblies;
}
protected override object GetInstance(Type serviceType, string key) {
string contract = string.IsNullOrEmpty(key) ? AttributedModelServices.GetContractName(serviceType) : key;
var exports = container.GetExportedValues<object>(contract);
if (exports.Count() > 0)
return exports.First();
throw new Exception(string.Format("Could not locate any instances of contract {0}.", contract));
}
protected override IEnumerable<object> GetAllInstances(Type serviceType) {
return container.GetExportedValues<object>(AttributedModelServices.GetContractName(serviceType));
}
protected override void BuildUp(object instance) {
container.SatisfyImportsOnce(instance);
}
}
[Export]
public class MuiContentLoader : DefaultContentLoader {
protected override object LoadContent(Uri uri) {
var content = base.LoadContent(uri);
if (content == null)
return null;
// Locate VM
var viewModel = ViewModelLocator.LocateForView(content);
if (viewModel == null)
return content;
// Bind VM
if (content is DependencyObject)
ViewModelBinder.Bind(viewModel, content as DependencyObject, null);
return content;
}
}
MuiView.xaml(Shell)
但没有人开枪。经过一些调试后,我发现ModernFrame
正在检查(设置视图为IContent)
中的事件,而这些事件没有,因为它只是一个普通的用户控件。因此,我创建了一个自定义UserControl类,试图将事件传递给ViewModel:
多内容控制
<mui:ModernWindow x:Class="XMOperations.Views.MuiView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mui="http://firstfloorsoftware.com/ModernUI"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
ContentLoader="{StaticResource ModernContentLoader}"
d:DesignHeight="300" d:DesignWidth="300">
<mui:ModernWindow.TitleLinks>
<mui:Link DisplayName="Settings" Source="/Views/SettingsView.xaml" />
</mui:ModernWindow.TitleLinks>
<mui:ModernWindow.MenuLinkGroups>
<mui:LinkGroupCollection>
<mui:LinkGroup GroupName="Hello" DisplayName="Hello">
<mui:LinkGroup.Links>
<mui:Link Source="/Views/ChildView.xaml" DisplayName="Click me"></mui:Link>
</mui:LinkGroup.Links>
</mui:LinkGroup>
</mui:LinkGroupCollection>
</mui:ModernWindow.MenuLinkGroups>
[Export(typeof(IShell))]
public class MuiViewModel : Conductor<IScreen>.Collection.OneActive, IShell {
}
public delegate void FragmentNavigationEventHandler(object sender, FragmentNavigationEventArgs e);
public delegate void NavigatedFromEventHandler(object sender, NavigationEventArgs e);
public delegate void NavigatedToEventHandler(object sender, NavigationEventArgs e);
public delegate void NavigatingFromEventHandler(object sender, NavigatingCancelEventArgs e);
public class MuiContentControl : UserControl, IContent {
public event FragmentNavigationEventHandler FragmentNavigation;
public event NavigatedFromEventHandler NavigatedFrom;
public event NavigatedToEventHandler NavigatedTo;
public event NavigatingFromEventHandler NavigatingFrom;
public MuiContentControl() : base() {
}
public void OnFragmentNavigation(FragmentNavigationEventArgs e) {
if(FragmentNavigation != null)
FragmentNavigation(this, e);
}
public void OnNavigatedFrom(NavigationEventArgs e) {
if (NavigatedFrom != null)
NavigatedFrom(this, e);
}
public void OnNavigatedTo(NavigationEventArgs e) {
if(NavigatedTo != null)
NavigatedTo(this, e);
}
public void OnNavigatingFrom(NavigatingCancelEventArgs e) {
if(NavigatingFrom != null)
NavigatingFrom(this, e);
}
}
然后我修改了视图以侦听带有消息的事件。附加:
设置视图
<local:MuiContentControl x:Class="XMOperations.Views.SettingsView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mui="http://firstfloorsoftware.com/ModernUI"
xmlns:cal="http://www.caliburnproject.org"
xmlns:local="clr-namespace:XMOperations"
cal:Message.Attach="[Event FragmentNavigation] = [Action OnFragmentNavigation($source, $eventArgs)];
[Event NavigatedFrom] = [Action OnNavigatedFrom($source, $eventArgs)];
[Event NavigatedTo] = [Action OnNavigatedTo($source, $eventArgs)];
[Event NavigatingFrom] = [Action OnNavigatingFrom($source, $eventArgs)]"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid Style="{StaticResource ContentRoot}">
<mui:ModernTab SelectedSource="/Views/Settings/AppearanceView.xaml" Layout="List" ContentLoader="{StaticResource ModernContentLoader}">
<mui:ModernTab.Links>
<mui:Link DisplayName="Appearance" Source="/Views/Settings/AppearanceView.xaml" />
</mui:ModernTab.Links>
</mui:ModernTab>
</Grid>
唯一没有触发的事件是导航到,因此我相信Message.Attach在发送事件之前不会被应用。我可能是用了一种非常错误的方式来做这件事,并且我愿意进行大规模的重建。好吧,这最终并没有那么糟糕——它确实让尝试将事件传递给虚拟机的过程变得更容易了
我为ModernFrame
控件创建了一个导体,该控件存在于ModernWindow
控件模板中
// Example viewmodel:
public class ModernWindowViewModel : Conductor<IScreen>.Collection.OneActive
{
protected override void OnViewLoaded(object view)
{
base.OnViewLoaded(view);
// Instantiate a new navigation conductor for this window
new FrameNavigationConductor(this);
}
}
您需要在虚拟机的OnViewLoaded
事件中为您的ModernWindow
创建一个导体实例,因为这似乎是最好的地方(即尚未进行导航,但控件已完全加载并已解析其模板)
现在,任何添加了IContent
界面的视图都将在导航发生时自动获得框架调用的方法
public class TestViewModel : Conductor<IScreen>, IContent
{
public void OnFragmentNavigation(FragmentNavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatedFrom(NavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatedTo(NavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
// Do stuff
}
}
公共类TestViewModel:Conductor,IContent
{
FragmentNavigation上的公共无效(FragmentNavigationEventArgs e)
{
//做事
}
OnNavigatedFrom(NavigationEventArgs e)上的公共无效
{
//做事
}
导航到时的公共无效(导航目标e)
{
//做事
}
NavigatingFrom上的公共无效(NavigatingCancelEventArgs e)
{
//做事
}
}
我已经测试过,这适用于出现在IContent
上的所有4个导航事件-因为它通过EventArgs
可以直接从虚拟机取消导航事件,或者在仅查看的场景中执行通常会执行的任何操作
我认为这可能是我能想到的最省力的方法——在窗口中输入一行代码,在虚拟机上实现接口,您就完成了:)
编辑:
我唯一可能添加的是在将导体添加到窗口时引发一些异常,或者可能是调试日志通知,以防由于某种原因,它找不到框架(框架的名称可能会在以后的m:ui版本中更改)我在我的IContent视图中执行了后续操作,并在我的ViewModels上实现了IContent
public void OnFragmentNavigation(FirstFloor.ModernUI.Windows.Navigation.FragmentNavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnFragmentNavigation(e);
}
}
}
public void OnNavigatedFrom(FirstFloor.ModernUI.Windows.Navigation.NavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatedFrom(e);
}
}
}
public void OnNavigatedTo(FirstFloor.ModernUI.Windows.Navigation.NavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatedTo(e);
}
}
}
public void OnNavigatingFrom(FirstFloor.ModernUI.Windows.Navigation.NavigatingCancelEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatingFrom(e);
}
}
}
我感觉到了你的痛苦——由于MUI是一种视图优先的方法,这似乎比它应该做的要困难一些。我的磁盘上某处有一个MUI测试项目,所以我会看一看(我将在不久的将来使用它,所以这是有用的信息!)做得好!我对CM的研究还不够深入,无法构建类似于FrameNavigationDirector的东西。
public class TestViewModel : Conductor<IScreen>, IContent
{
public void OnFragmentNavigation(FragmentNavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatedFrom(NavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatedTo(NavigationEventArgs e)
{
// Do stuff
}
public void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
// Do stuff
}
}
public void OnFragmentNavigation(FirstFloor.ModernUI.Windows.Navigation.FragmentNavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnFragmentNavigation(e);
}
}
}
public void OnNavigatedFrom(FirstFloor.ModernUI.Windows.Navigation.NavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatedFrom(e);
}
}
}
public void OnNavigatedTo(FirstFloor.ModernUI.Windows.Navigation.NavigationEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatedTo(e);
}
}
}
public void OnNavigatingFrom(FirstFloor.ModernUI.Windows.Navigation.NavigatingCancelEventArgs e)
{
if (this.DataContext != null)
{
var viewModel = this.DataContext as IContent;
if (viewModel != null)
{
viewModel.OnNavigatingFrom(e);
}
}
}