Wpf棱镜区域导航

时间:2017-05-24 14:44:08

标签: c# wpf xaml prism

我一直在尝试使用Prism和区域进行基于视图的导航。我尝试浏览MSDN上的文档,但由于某种原因,我无法让它工作,我不知道我做错了什么。所以这就是我到目前为止所得到的:

MainShellViewModel.cs

//Private Variables
private readonly IRegionManager _regionManager;

//Public Variables
public DelegateCommand<string> NavigateCommand { get; set; }

//Functions and Methods
public MainShellViewModel(IRegionManager regionManager)
{
    //Region Manager
    _regionManager = regionManager;
    NavigateCommand = new DelegateCommand<string>(Navigate);
    Initialize();
}

public void Initialize()
{
    //Startup View
    _regionManager.RegisterViewWithRegion("ViewMainFrame", typeof(Views.Dashboard));
}

public void Navigate(string uri)
{
    //Navigation
    if(uri != null)
    {
        _regionManager.RequestNavigate("ViewMainFrame", uri);
    }
}

旁注:我接下来的许多教程中有一个让我使用Navigate方法,我需要它吗?我使用MainShellViewModel作为在启动时注入的主视图。

DashboardViewModel.cs :(包含错误)

{
    //Private Variables
    private bool _canExercise = true;

    //Public Variables
    public bool CanExercise()
    {
        return _canExercise;
    }

    RelayCommand _exerciseSelCommand;
    public ICommand ExerciseSelCommand
    {
        get
        {
            if (_exerciseSelCommand == null)
                _exerciseSelCommand = new RelayCommand(ExerciseSel, CanExercise);

            return _exerciseSelCommand;
        }
    }

    //Dashboard Functions and Methods
    IRegion _regionManager;

    private void ExerciseSel()
    {
        SoundPlayers.ButtonSound();
        _regionManager.RequestNavigate(new Uri("ExerciseView", UriKind.Relative)); //This gives me the error, it says it can't be nullable?
    }

这是我注册容器/视图等的地方。

Bootstrapper.cs:

protected override void ConfigureContainer()
{
    base.ConfigureContainer();
    #region Region Register Zone
    //register views here!
    Container.RegisterType(typeof(object), typeof(Views.LoginView), "LoginView");
    Container.RegisterType(typeof(object), typeof(Views.Dashboard), "Dashboard");
    Container.RegisterType(typeof(object), typeof(Views.ExerciseView), "SettingsView"); 
    Container.RegisterType(typeof(object), typeof(Views.ResultsView), "ResultsView");
    Container.RegisterType(typeof(object), typeof(Views.UserCreationView), "UserCreationView");
    #endregion
}

所以基本上我只是希望能够从仪表板(这是我当前的启动视图)到达我的容器中的任何其他视图,只需点击一下按钮。

MainShell.xaml:

<Window x:Name="Shell" 
    x:Class="Equinox.Views.MainShell"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:prism="http://www.codeplex.com/prism"
    prism:ViewModelLocator.AutoWireViewModel="True"
    Title="Equinox"
    FontFamily="Quicksand"
    Height="900" 
    Width="1500"
    SizeToContent="WidthAndHeight"
    ResizeMode="CanResize"
    Background="#EEF3F4"
    WindowStyle="SingleBorderWindow"
    Icon="/Equinox;component/favicon.ico"
    WindowStartupLocation="CenterScreen">

<!-- Main View Region -->

<ContentControl x:Name="ContentControlMain"
                prism:RegionManager.RegionName="ViewMainFrame" 
                Focusable="False"/>

然而,当我尝试让我的区域采取另一种观点时,我一直都会遇到错误。我这样做的方法是使用我的DashboardViewModel,并创建另一个名为IRegionManager的{​​{1}},并执行RequestNavigation。在我运行并按下应将我链接到下一个视图的按钮之前,我没有任何错误。

任何帮助将不胜感激!

谢谢!

2 个答案:

答案 0 :(得分:3)

不确定你是否已经得到答案,但我今天遇到了同样的事情。 Brian的评论给了我必要的暗示。

我在bootstrapper中有以下代码。这会注册两个视图以允许导航到它们:

public class Bootstrapper : UnityBootstrapper
{
    protected override DependencyObject CreateShell()
    {
        return Container.Resolve<MainWindow>();
    }

    protected override void InitializeShell()
    {
        Application.Current.MainWindow.Show();
    }

    protected override void ConfigureContainer()
    {
        base.ConfigureContainer();
        Container.RegisterTypeForNavigation<ViewA>("ViewA");
        Container.RegisterTypeForNavigation<ViewB>("ViewB");
    }
}

这给出了一个MainWindow,它注册了ViewA和ViewB。 要允许从ViewA上的按钮导航到ViewB,需要在ViewAViewModel中完成以下操作:

public class ViewAViewModel: BindableBase
{
    private readonly IRegionManager _regionManager;

    public ViewAViewModel(IRegionManager regionManager)
    {
        _regionManager = regionManager;

        ButtonCommand= new DelegateCommand(ButtonClicked);
    }        

    private void ButtonClicked()
    {
        _regionManager.RequestNavigate("ContentRegion", "ViewB");
    }
}

在XAML表格ViewA中,你需要的最后一件事当然是按钮本身:

<Button Content="Navigate" Command="{Binding ButtonCommand}"/>

答案 1 :(得分:2)

查看样本17,18和19.这应该有助于您朝着正确的方向前进:

https://github.com/PrismLibrary/Prism-Samples-Wpf