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1、项目引入 Prism.DryIoc
2、规则说明
窗体必须放在Views文件夹下而且必须以View结尾，ViewModel必须放在ViewModels文件夹下面,文件必须以ViewModel结尾。
在prism框架下，可以不为窗体设定数据上下文，但，在窗体中必须显示声明：
xmlns:Prism="http://prismlibrary.com/" Prism:ViewModelLocator.AutoWireViewModel="True"
在App.xaml的cs文件中要显示声明继承自 PrismApplication
public partial class App : PrismApplication { protected override Window CreateShell() { return Container.Resolve<MainView>(); } protected override void RegisterTypes(IContainerRegistry containerRegistry) { } }
app.xaml 更改如下：
<Prism:PrismApplication x:Class="WpfApp3.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfApp3" xmlns:Prism="http://prismlibrary.com/" > <Application.Resources> </Application.Resources> </Prism:PrismApplication>
注：xaml中必须显示引入 xmlns:Prism ，且修改窗体标签为：<Prism:PrismApplication> </Prism:PrismApplication>
xmlns:Prism="http://prismlibrary.com/"
3、新建Views文件夹，并创建 MainView.xaml
<Window x:Class="WpfApp3.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:WpfApp3" xmlns:Prism="http://prismlibrary.com/" Prism:ViewModelLocator.AutoWireViewModel="True" mc:Ignorable="d" Title="MainWindow" Height="450" Width="800"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="auto"/> <RowDefinition/> </Grid.RowDefinitions> <StackPanel Orientation="Horizontal"> <Button Content="viewA" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewA"></Button> <Button Content="viewB" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewB"></Button> <Button Content="viewC" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewC"></Button> </StackPanel> <ContentControl Grid.Row="1" Content="{Binding Body}"/> </Grid> </Window>
4、新建 ViewModels 文件夹，并新建viewModel如下
public class MainViewModel : BindableBase { public DelegateCommand<string> BtnCommand { get;private set; } public MainViewModel() { BtnCommand = new DelegateCommand<string>(GoUrl); Body = new viewA(); } private object body; public object Body { get { return this.body; } set { this.body = value; RaisePropertyChanged(); } } private void GoUrl(string param) { switch (param) { case "viewA": Body = new viewA(); break; case "viewB": Body = new viewB(); break; case "viewC": Body = new viewC(); break; default: Body = new viewA(); break; } } }
说明：viewModel 继承自 BindableBase，属性双向绑定需设置： RaisePropertyChanged(); ，Command命令使用： DelegateCommand，带参数的使用 DelegateCommand<T>
5、新建 UserControls 文件夹，并创建用户控件 ViewA/ViewB/ViewC
以ViewA为例
<UserControl x:Class="WpfApp3.UserControls.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:WpfApp3.UserControls" mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"> <Grid> <TextBlock Text="I am ViewA" FontSize="18"/> </Grid> </UserControl>
5、效果如下：
6、Prism:RegionManager 初体验
上述代码中，为了填充ContentControl中的内容，我们需要定义Body属性，Prism 提供了无需新建属性的方法，如下：
6.1、将 ContentControl 改为如下：
<ContentControl Grid.Row="1" Prism:RegionManager.RegionName="ContentRegion"/>
这里定义了一个Region，名称为 ContentRegion
6.2、在App.cs中注入导航组件，如下：
protected override Window CreateShell() { return Container.Resolve<MainView>(); } protected override void RegisterTypes(IContainerRegistry containerRegistry) { containerRegistry.RegisterForNavigation<viewA>("viewA");//如果不声明名字为viewA , 默认和类名一致 containerRegistry.RegisterForNavigation<viewB>("viewB");//如果不声明名字为viewB , 默认和类名一致 containerRegistry.RegisterForNavigation<viewC>("viewC");//如果不声明名字为viewC , 默认和类名一致 }
6.3、修改viewModel代码如下：
public class MainViewModel : BindableBase { public DelegateCommand<string> BtnCommand { get;private set; } private readonly IRegionManager regionManager; public MainViewModel(IRegionManager regionManager) { BtnCommand = new DelegateCommand<string>(GoUrl); this.regionManager = regionManager; } private void GoUrl(string param) { //regionManager.Regions["ContentRegion"].Add(new viewB()); regionManager.Regions["ContentRegion"].RequestNavigate(param); } }
说明： regionManager.Regions 可以获取 所有指定了 Prism:RegionManager.RegionName 的xaml 元素区域
填充的方法可以用 Add 也可以使用 RequestNavigate ， RequestNavigate 方法中为App.cs 注册的导航名称
7、模块化
上述案例中，viewA,viewB,viewC 等和Wpf启动项目在同一个项目中，这样不便于管理，为了更好了解耦，Prism 引入了模块化 Moudle
7.1、新建Wpf项目，并删除自动创建的文件
7.2、修改输出类型为类库
7.3、引入 Prism.DryIoc
7.4、添加viewC用户控件，并新建 wpf4Profile.cs 并继承自IModule，然后实现接口
using Prism.Ioc; using Prism.Modularity; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace WpfApp4 { public class wpfApp4Profile : IModule { public void OnInitialized(IContainerProvider containerProvider) { } public void RegisterTypes(IContainerRegistry containerRegistry) { containerRegistry.RegisterForNavigation<viewC>("viewC"); } } }
7.5、在启动的wpfApp项目中引用新建的项目
7.6、app.xaml.cs 中重写 ConfigureModuleCatalog 方法
/// <summary> /// Interaction logic for App.xaml /// </summary> public partial class App : PrismApplication { protected override Window CreateShell() { return Container.Resolve<MainView>(); } protected override void RegisterTypes(IContainerRegistry containerRegistry) { } protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog) { moduleCatalog.AddModule<WpfApp1Profile>(); moduleCatalog.AddModule<WpfApp2Profile>(); moduleCatalog.AddModule<wpfApp4Profile>(); base.ConfigureModuleCatalog(moduleCatalog); } }
7.7、MainView xaml 同上一致，viewModel 也是一致
<Window x:Class="WpfApp3.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:WpfApp3" xmlns:Prism="http://prismlibrary.com/" Prism:ViewModelLocator.AutoWireViewModel="True" mc:Ignorable="d" Title="MainWindow" Height="450" Width="800"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="auto"/> <RowDefinition/> </Grid.RowDefinitions> <StackPanel Orientation="Horizontal"> <Button Content="viewA" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewA"></Button> <Button Content="viewB" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewB"></Button> <Button Content="viewC" Margin="5" Height="35" Width="100" Command="{Binding BtnCommand}" CommandParameter="viewC"></Button> </StackPanel> <ContentControl Grid.Row="1" Prism:RegionManager.RegionName="ContentRegion"/> </Grid> </Window>
cs 如下
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 System.Windows.Input; using WpfApp3.UserControls; namespace WpfApp3.ViewModels { public class MainViewModel : BindableBase { public DelegateCommand<string> BtnCommand { get;private set; } private readonly IRegionManager regionManager; public MainViewModel(IRegionManager regionManager) { BtnCommand = new DelegateCommand<string>(GoUrl); this.regionManager = regionManager; } private void GoUrl(string param) { //regionManager.Regions["ContentRegion"].Add(new viewB()); regionManager.Regions["ContentRegion"].RequestNavigate(param); } } }
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