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1、項目引入 Prism.DryIoc
2、規則說明
窗體必須放在Views文件夾下而且必須以View結尾，ViewModel必須放在ViewModels文件夾下面,文件必須以ViewModel結尾。
在prism框架下，可以不爲窗體設定數據上下文，但，在窗體中必須顯示聲明：
xmlns:Prism="http://prismlibrary.com/" Prism:ViewModelLocator.AutoWireViewModel="True"
在App.xaml的cs文件中要顯示聲明繼承自 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中必須顯示引入 xmlns:Prism ，且修改窗體標籤爲：<Prism:PrismApplication> </Prism:PrismApplication>
xmlns:Prism="http://prismlibrary.com/"
3、新建Views文件夾，並創建 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 文件夾，並新建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; } } }
說明：viewModel 繼承自 BindableBase，屬性雙向綁定需設置： RaisePropertyChanged(); ，Command命令使用： DelegateCommand，帶參數的使用 DelegateCommand<T>
5、新建 UserControls 文件夾，並創建用戶控件 ViewA/ViewB/ViewC
以ViewA爲例
<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 初體驗
上述代碼中，爲了填充ContentControl中的內容，我們需要定義Body屬性，Prism 提供了無需新建屬性的方法，如下：
6.1、將 ContentControl 改爲如下：
<ContentControl Grid.Row="1" Prism:RegionManager.RegionName="ContentRegion"/>
這裏定義了一個Region，名稱爲 ContentRegion
6.2、在App.cs中注入導航組件，如下：
protected override Window CreateShell() { return Container.Resolve<MainView>(); } protected override void RegisterTypes(IContainerRegistry containerRegistry) { containerRegistry.RegisterForNavigation<viewA>("viewA");//如果不聲明名字爲viewA , 默認和類名一致 containerRegistry.RegisterForNavigation<viewB>("viewB");//如果不聲明名字爲viewB , 默認和類名一致 containerRegistry.RegisterForNavigation<viewC>("viewC");//如果不聲明名字爲viewC , 默認和類名一致 }
6.3、修改viewModel代碼如下：
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); } }
說明： regionManager.Regions 可以獲取 所有指定了 Prism:RegionManager.RegionName 的xaml 元素區域
填充的方法可以用 Add 也可以使用 RequestNavigate ， RequestNavigate 方法中爲App.cs 註冊的導航名稱
7、模塊化
上述案例中，viewA,viewB,viewC 等和Wpf啓動項目在同一個項目中，這樣不便於管理，爲了更好了解耦，Prism 引入了模塊化 Moudle
7.1、新建Wpf項目，並刪除自動創建的文件
7.2、修改輸出類型爲類庫
7.3、引入 Prism.DryIoc
7.4、添加viewC用戶控件，並新建 wpf4Profile.cs 並繼承自IModule，然後實現接口
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、在啓動的wpfApp項目中引用新建的項目
7.6、app.xaml.cs 中重寫 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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