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Wpf使用Prism的IRegionManager实现页面导航

时间：2024-07-14 21:25:40浏览次数：15  
标签：IRegionManager xaml System Windows Prism using Wpf public

Wpf使用Prism的IRegionManager实现页面导航

背景

之前使用winform的形式，利用事件和委托（复杂可以利用反射）实现了wpf的页面跳转。

页面间的导航可以通过使用Prism类库实现，本章节主要讲述这个。

参考内容

文字讲解因为有人做了更好的讲解，所以直接将索引放在下方。但单凭讲解没有完整代码，理解需要更多的时间。特将demo的全部讲解贴在此处。

讲解:Prism区域管理实现导航_regionmanager.registerviewwithregion("lefttreemenu-CSDN博客

实际代码

App.xaml

<prism:PrismApplication x:Class="WPFPrism.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WPFPrism"
             xmlns:prism="http://prismlibrary.com/">
    <Application.Resources>

    </Application.Resources>
</prism:PrismApplication>

App.xaml.cs

using ModuleA;
//using ModuleB;
using Prism.DryIoc;
using Prism.Ioc;
using Prism.Modularity;
using System.Windows;
using WPFPrism.Views;

namespace WPFPrism
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : PrismApplication
    {
        /// <summary>
        /// Creates the shell or main window of the application.
        /// </summary>
        /// <returns></returns>
        protected override Window CreateShell()
        {
            //通过容器去拿MainView,也是启动的地方
            return Container.Resolve<MainView>();
        }

        /// <summary>
        /// Used to register types with the container that will be used by your application.
        /// </summary>
        /// <param name="containerRegistry"></param>
        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            //依赖注入的功能，增加依赖注入要实现的内容
            //containerRegistry.RegisterForNavigation<ViewA>(); //containerRegistry.RegisterForNavigation<ViewA>("ViewA的具体名字")自定义，可以这样写;
            //containerRegistry.RegisterForNavigation<ViewB>();
            containerRegistry.RegisterForNavigation<ViewC>();//我们依然使用C模块，C模块是当前程序的。
            containerRegistry.RegisterForNavigation<ViewD>();
        }

        /// <summary>
        /// Configures the Prism.Modularity.IModuleCatalog used by Prism.
        /// </summary>
        /// <param name="moduleCatalog"></param>
        protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog)
        {
            //这里是走代码的
            //moduleCatalog.AddModule<ModuleAfile>();//加载A模块
            moduleCatalog.AddModule<ModuleBfile>();//加载B模块
            base.ConfigureModuleCatalog(moduleCatalog);
        }

        /// <summary>
        ///  Creates the Prism.Modularity.IModuleCatalog used by Prism.
        /// </summary>
        /// <returns></returns>
        protected override IModuleCatalog CreateModuleCatalog()
        {
            //这里是走配置的
            //return new DirectoryModuleCatalog()
            //{
            //    ModulePath = @"Modules"//这里是主程序exe同文件夹下面的Modules文件夹
            //};
            return base.CreateModuleCatalog();
        }
    }
}

MainViewModel.xaml.cs

using Prism.Commands;   
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WPFPrism.Views;

namespace WPFPrism.ViewModels
{
    public class MainViewModel : BindableBase
    {
        private readonly IRegionManager regionManager;//区域管理
        private IRegionNavigationJournal journal;//区域导航日志
        public DelegateCommand<string> OpenCommand { get; set; }//创建命令，string用来接收参数，例如ViewA
        public DelegateCommand BackCommand { get; set; }//创建导航上一步命令
        public DelegateCommand ForwardCommand { get; set; }//创建导航下一步命令
        public MainViewModel(IRegionManager regionManager)//这里点击快速操作。拿界面定义的区域Content
        {
            BackCommand = new DelegateCommand(Back);
            ForwardCommand = new DelegateCommand(Forward);
            OpenCommand = new DelegateCommand<string>(Open);
            this.regionManager = regionManager;//拿到这个值
        }

        private void Forward()
        {
            if (journal.CanGoForward)
                journal.GoForward();
        }

        private void Back()//返回上一步方法
        {
            if (journal.CanGoBack)
                journal.GoBack();

        }

        private void Open(string obj)
        {
            NavigationParameters keys = new NavigationParameters();
            keys.Add("Title", "Hello");
            regionManager.Regions["Content"].RequestNavigate(obj, callBack =>
             {
                 if ((bool)callBack.Result)//导航问题
                 {
                     journal = callBack.Context.NavigationService.Journal;
                 }
             }, keys);//这里需要依赖注入的方式
        }
    }

}

MainView.xaml

<Window x:Class="WPFPrism.Views.MainView"
        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"
        xmlns:prism="http://prismlibrary.com/"
        prism:ViewModelLocator.AutoWireViewModel="True"
        xmlns:local="clr-namespace:WPFPrism"
        mc:Ignorable="d"
        Title="MainView" Height="450" Width="800">
    <!--自动关联AutoWireViewModel-->
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="auto"/>
            <RowDefinition />
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal" >
            <Button Content="打开模块A" Margin="5" Command="{Binding OpenCommand}" CommandParameter="ViewA"/>
            <Button Content="打开模块B" Margin="5" Command="{Binding OpenCommand}" CommandParameter="ViewB"/>
            <Button Content="打开模块C" Margin="5" Command="{Binding OpenCommand}" CommandParameter="ViewC"/>
            <Button Content="打开模块D" Margin="5" Command="{Binding OpenCommand}" CommandParameter="ViewD"/>
            <Button Content="返回上一步" Margin="5" Command="{Binding BackCommand}" />
            <Button Content="返回下一步" Margin="5" Command="{Binding ForwardCommand}" />
        </StackPanel>
        <ContentControl Grid.Row="1" prism:RegionManager.RegionName="Content" />
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPFPrism.Views
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainView : Window
    {
        public MainView()
        {
            InitializeComponent();
        }
    }
}

ViewC.xaml

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPFPrism.Views
{
    /// <summary>
    /// ViewC.xaml 的交互逻辑
    /// </summary>
    public partial class ViewC : UserControl
    {
        public ViewC()
        {
            InitializeComponent();
        }
    }
}

<UserControl x:Class="WPFPrism.Views.ViewC"
             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:local="clr-namespace:WPFPrism.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800" Background="Orange">
    <Grid>
        <TextBlock Text="我 是 C" FontSize="50"/>
    </Grid>
</UserControl>

ViewD.xaml

<UserControl x:Class="WPFPrism.Views.ViewD"
        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"
        xmlns:local="clr-namespace:WPFPrism.Views"
        mc:Ignorable="d" Height="450" Width="800" Background="Green">
    <Grid>
        <TextBlock Text="我 是 D" FontSize="50"/>
    </Grid>
</UserControl>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WPFPrism.Views
{
    /// <summary>
    /// ViewD.xaml 的交互逻辑
    /// </summary>
    public partial class ViewD : UserControl
    {
        public ViewD()
        {
            InitializeComponent();
        }
    }
}

ViewAViewModel.cs

using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace ModuleA.ViewModels
{
    public class ViewAViewModel : BindableBase, IConfirmNavigationRequest  //INavigationAware  //IConfirmNavigationRequest导航离开的时候，进行判断提示
    {
        private string title;

        public string Title
        {
            get { return title; }
            set { title = value; RaisePropertyChanged(); }
        }

        public ViewAViewModel()
        {
            //执行顺序1
        }
        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            //每次重新重新导航的时候，是否重用原来的实例
            return true;
        }


        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            //在导航离开时调用。
        }

        /// <summary>
        /// 当已导航到实现时调用。
        /// </summary>
        /// <param name="navigationContext"></param>
        public void OnNavigatedTo(NavigationContext navigationContext)
        {

            //执行顺序2
            if (navigationContext.Parameters.ContainsKey("Title"))//判断是否有值再赋值
            {
                Title = navigationContext.Parameters.GetValue<string>("Title");
            }
        }

        public void ConfirmNavigationRequest(NavigationContext navigationContext, Action<bool> continuationCallback)
        {
            //导航离开的时候，进行判断提示，是否允许从A到B模块

            bool b = true;
            if (MessageBox.Show("确定切换吗", "提示", MessageBoxButton.YesNo) == MessageBoxResult.No)
                b = false;
            continuationCallback(b);
        }
    }
}

ViewA.xaml

<UserControl x:Class="ModuleA.Views.ViewA"
             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:local="clr-namespace:ModuleA.Views"
                     xmlns:prism="http://prismlibrary.com/"
        prism:ViewModelLocator.AutoWireViewModel="True"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800" Background="Red">
    <Grid>
        <TextBlock Text="我是A" FontSize=" 30"/>
        <TextBlock Margin="50" Text="{Binding Title}" FontSize=" 30"/>
    </Grid>
</UserControl>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ModuleA.Views
{
    /// <summary>
    /// ViewsA.xaml 的交互逻辑
    /// </summary>
    public partial class ViewA : UserControl
    {
        public ViewA()
        {
            InitializeComponent();
        }
    }
}

ModuleAfile.cs

using ModuleA.ViewModels;
using ModuleA.Views;
using Prism.Ioc;
using Prism.Modularity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ModuleA
{
    public class ModuleAfile : IModule

    {
        public void OnInitialized(IContainerProvider containerProvider)
        {
            //初始化
        }

        public void RegisterTypes(IContainerRegistry containerRegistry)
        {
            //依赖注入，模块注册。和主程序继承PrismApplication类似。
            containerRegistry.RegisterForNavigation<ViewA,ViewAViewModel>();//进行匹配，这里一般不使用自动匹配
        }
    }
}

好了,分享就到这里。

标签：IRegionManager,xaml,System,Windows,Prism,using,Wpf,public
From： https://blog.csdn.net/yannsann/article/details/140423206

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