C#-Wpf-Prism.DryIoc-【3】导航日志

【1】先完成基本的环境搭建，可参考C#-WPF-Prism.DryIoc-【1】环境搭建 - 轻吟浅唱，蓦然花开 - 博客园 (cnblogs.com)

【2】创建基本项目结构如下图，其中MainView是窗体(Window)，View1、View2和View3是用户控件(UserControl)

 

 【3】编辑App.xaml.cs 将View1、View2和View3注册为导航

using Prism.DryIoc;
using Prism.Ioc;
using System.Windows;
using Wpf_Prism.DryIoc_NavigationJournal.Views;

namespace Wpf_Prism.DryIoc_NavigationJournal
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App
    {
        protected override Window CreateShell()
        {
            return Container.Resolve<MainView>();
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.RegisterForNavigation<View1>();
            containerRegistry.RegisterForNavigation<View2>();
            containerRegistry.RegisterForNavigation<View3>();
        }
    }
}

 

【4】编辑MainView.xaml，添加5个按钮并绑定命令和参数（用来切换3个页面）和一个ContentControl（用来承载三个页面）代码如下：

<Window x:Class="Wpf_Prism.DryIoc_NavigationJournal.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:local="clr-namespace:Wpf_Prism.DryIoc_NavigationJournal.Views"
        xmlns:prism="http://prismlibrary.com/"
        prism:ViewModelLocator.AutoWireViewModel="True"
        mc:Ignorable="d"
        Title="MainView" Height="450" Width="800">
    <DockPanel>
        <UniformGrid Columns="5" DockPanel.Dock="Top">
            <Button Content="打开View1" Command="{Binding OpenViewCommand}" CommandParameter="View1"/>
            <Button Content="打开View2" Command="{Binding OpenViewCommand}" CommandParameter="View2"/>
            <Button Content="打开View3" Command="{Binding OpenViewCommand}" CommandParameter="View3"/>
            <Button Content="上一页" Command="{Binding LastCommand}"/>
            <Button Content="下一页" Command="{Binding NextCommand}"/>
        </UniformGrid>
        <!--#region 用来承载 View1 View2 View3 这三个不同的页面-->
        <ContentControl prism:RegionManager.RegionName="MainContentRegion"/>
    </DockPanel>
</Window>

【5】编辑MainViewModel.cs 分别配置相应的命令 以及导航的实现，代码如下

using Prism.Commands;
using Prism.Regions;

namespace Wpf_Prism.DryIoc_NavigationJournal.ViewModels
{
    public class MainViewModel
    {
        private readonly IRegionManager regionManager;
        private IRegionNavigationJournal regionNavigationJournal;

        /// <summary>
        /// 打开页面命令
        /// </summary>
        public DelegateCommand<string> OpenViewCommand { get; private set; }
        public DelegateCommand LastCommand { get; private set; }
        public DelegateCommand NextCommand { get; private set; }
        public MainViewModel(IRegionManager regionManager)
        {
            this.regionManager = regionManager;
            //注册三个命令
            OpenViewCommand = new DelegateCommand<string>(OpenView);
            LastCommand = new DelegateCommand(Last);
            NextCommand = new DelegateCommand(Next);
        }
        private void Last()
        {
            if (regionNavigationJournal != null)
                if (regionNavigationJournal.CanGoBack)
                    regionNavigationJournal.GoBack();
        }
        private void Next()
        {
            if (regionNavigationJournal != null)
                if (regionNavigationJournal.CanGoForward)
                    regionNavigationJournal.GoForward();
        }

        private void OpenView(string obj)
        {
            regionManager.Regions["MainContentRegion"].RequestNavigate(obj, callback =>
            {
                if (callback.Result != null)
                    regionNavigationJournal = callback.Context.NavigationService.Journal;
            });
        }
    }
}

 

【6】启动项目，效果如下

完成，谢谢！