项目结构
1.创建对话框 用户控件
Views \ DialogView.xaml
<UserControl x:Class="PrismWpfApp.Views.DialogView"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:PrismWpfApp.Views"mc:Ignorable="d" d:DesignHeight="200" d:DesignWidth="400"><Grid><Grid.RowDefinitions><RowDefinition Height="auto"/><RowDefinition/><RowDefinition Height="auto"/></Grid.RowDefinitions><TextBlock Grid.Row="0" Text="温馨提示"></TextBlock><TextBlock Grid.Row="1" Text="{Binding Msg}"></TextBlock><StackPanel Grid.Row="2" Orientation="Horizontal"><Button Content="确定" Command="{Binding ConfirmCommand}" ></Button><Button Content="取消" Command="{Binding ConcelCommand}" ></Button></StackPanel></Grid>
</UserControl>
ViewModels \ DialogViewModel.cs
这里要注意一定要IDialogAware实现这个接口
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace PrismWpfApp.ViewModels
{/// <summary>/// 对话框 服务 Model/// </summary>public class DialogViewModel : BindableBase, IDialogAware{private string _mag;public string Msg{get { return _mag; }set{SetProperty(ref _mag, value);}}private string _userId;public string UserId{get { return _userId; }set{SetProperty(ref _userId, value);}}public string Title => "这是对话框的标题";/// <summary>/// 关闭 委托/// </summary>public event Action<IDialogResult> RequestClose;/// <summary>/// 是否能关闭对话框/// </summary>/// <returns></returns>/// <exception cref="NotImplementedException"></exception>public bool CanCloseDialog(){return true;}/// <summary>/// 关闭后要处理的逻辑/// </summary>/// <exception cref="NotImplementedException"></exception>public void OnDialogClosed(){//关闭也可以传参数（但一般不这么做）DialogParameters pairs = new DialogParameters();pairs.Add("Result", 0);//RequestClose 不为null时执行RequestClose?.Invoke(new DialogResult(ButtonResult.No, pairs));//两种方法等效//if (RequestClose != null)//{// RequestClose.Invoke(new DialogResult(ButtonResult.No));//}}/// <summary>/// 打开对话框前的处理逻辑/// </summary>/// <param name="parameters"></param>/// <exception cref="NotImplementedException"></exception>public void OnDialogOpened(IDialogParameters parameters){if (parameters.ContainsKey("Msg")){Msg = parameters.GetValue<string>("Msg");}if (parameters.ContainsKey("UserId")){UserId = parameters.GetValue<string>("UserId");}}/// <summary>/// 确定 命令/// </summary>public DelegateCommand<string> ConfirmCommand{get{return new DelegateCommand<string>((arg) =>{DialogParameters pairs = new DialogParameters();pairs.Add("Result", 1);pairs.Add("Msg", "成功");//RequestClose 不为null时执行RequestClose?.Invoke(new DialogResult(ButtonResult.OK, pairs));});}}/// <summary>/// 取消 命令/// </summary>public DelegateCommand<string> ConcelCommand{get{return new DelegateCommand<string>((arg) =>{//RequestClose 不为null时执行RequestClose?.Invoke(new DialogResult(ButtonResult.No));});}}}
}
3.注册 对话框服务
App.xaml.cs
using Prism.Ioc;
using Prism.Modularity;
using Prism.Unity;
using PrismWpfApp.ViewModels;
using PrismWpfApp.Views;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;namespace PrismWpfApp
{/// <summary>/// App.xaml 的交互逻辑/// </summary>public partial class App : PrismApplication{/// <summary>/// 提供主窗口的对象/// </summary>/// <returns></returns>/// <exception cref="NotImplementedException"></exception>protected override Window CreateShell(){//打开第一个窗口 ModuleWindow//return Container.Resolve<MainWindow>();return Container.Resolve<ModuleWindow>();//return new MainWindow();}/// <summary>/// 业务中所有需要注入的对象，在这个方法里注册/// </summary>/// <param name="containerRegistry"></param>/// <exception cref="NotImplementedException"></exception>protected override void RegisterTypes(IContainerRegistry containerRegistry){//注册 导航 RegisterForNavigationcontainerRegistry.RegisterForNavigation<UserControlA>();containerRegistry.RegisterForNavigation<UserControlB>();containerRegistry.RegisterForNavigation<UserControlC>();//注册 对话框服务containerRegistry.RegisterDialog<DialogView, DialogViewModel>();}/// <summary>/// 添加模块(代码引用)/// </summary>/// <param name="moduleCatalog"></param>//protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog)//{// moduleCatalog.AddModule<ModuleAProfile>();// moduleCatalog.AddModule<ModuleBProfile>();// base.ConfigureModuleCatalog(moduleCatalog);//}/// <summary>/// 创建模块/// </summary>protected override IModuleCatalog CreateModuleCatalog(){return new DirectoryModuleCatalog() { ModulePath = @".\Modules" };}//protected override void OnStartup(StartupEventArgs e)//{// base.OnStartup(e);// if (new LoginWindow().ShowDialog() == true)// {// new MainWindow().ShowDialog();// }// Application.Current.Shutdown();//}}
}
4.增加打开对话框服务 的按钮
ModuleWindow.xaml
<Window x:Class="PrismWpfApp.Views.ModuleWindow"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:PrismWpfApp.Views"xmlns:prism="http://prismlibrary.com/"prism:ViewModelLocator.AutoWireViewModel="True"mc:Ignorable="d"Title="{Binding Title}" Height="450" Width="800"><Grid><Grid.RowDefinitions><RowDefinition Height="30"></RowDefinition><RowDefinition ></RowDefinition></Grid.RowDefinitions><StackPanel Grid.Row="0" Orientation="Horizontal"><Button Content="模块1" Width="80" Height="30" Command="{Binding ShowContentCommand}" CommandParameter="UserControl1" ></Button><Button Content="模块2" Width="80" Height="30" Command="{Binding ShowContentCommand}" CommandParameter="UserControl2" ></Button><Button Content="后退" Width="80" Height="30" Command="{Binding BackCommand}" ></Button><Button Content="打开对话框" Width="80" Height="30" Command="{Binding ShowDialogCommand}" CommandParameter="DialogView" ></Button></StackPanel><ContentControl Grid.Row="1" prism:RegionManager.RegionName="ContentRegions"></ContentControl></Grid>
</Window>
ModuleWindowViewModel.cs
using Prism.Commands;
using Prism.Regions;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;namespace PrismWpfApp.ViewModels
{public class ModuleWindowViewModel : UiViewModelBase{/// <summary>/// Prism 提供 区域管理接口/// </summary>private readonly IRegionManager _regionManager;public ModuleWindowViewModel(IRegionManager regionManager, IDialogService dialogService){this.Title = "XXX系统";_regionManager = regionManager;_dialogService = dialogService;}/// <summary>/// 记录上一步（导航记录）/// </summary>private IRegionNavigationJournal _navigationJournal;/// <summary>/// 对话框服务/// </summary>private readonly IDialogService _dialogService;/// <summary>/// 显示区域内容/// </summary>public DelegateCommand<string> ShowContentCommand{get{return new DelegateCommand<string>((arg) =>{// 打开 区域、模块//_regionManager.Regions["ContentRegions"].RequestNavigate(arg);//打开导导航NavigationParameters paras = new NavigationParameters();paras.Add("MsgA", "大家好，我是A");//模块参数传递paras.Add("MsgB", "大家好，我是B");//_regionManager.Regions["ContentRegions"].RequestNavigate(arg, paras);_regionManager.Regions["ContentRegions"].RequestNavigate(arg, callback =>{_navigationJournal = callback.Context.NavigationService.Journal;}, paras);});}}/// <summary>/// 后退 （记录好上一步后，就可以后退了）/// </summary>public DelegateCommand<string> BackCommand{get{return new DelegateCommand<string>((arg) =>{//判断是否可以后退if (_navigationJournal != null && _navigationJournal.CanGoBack){_navigationJournal.GoBack();//后退}});}}/// <summary>/// 打开对话框 命令/// </summary>public DelegateCommand<string> ShowDialogCommand{get{return new DelegateCommand<string>((arg) =>{//传参数DialogParameters pairs = new DialogParameters();pairs.Add("Title", "动态标题");pairs.Add("Msg", "这是传递的消息");pairs.Add("UserId", 1);//用户ID//页面名称//callback 是回调方法_dialogService.ShowDialog(arg, pairs, callback =>{//接收返回参数if (callback.Result == ButtonResult.OK){if (callback.Parameters.ContainsKey("Result")){var result = callback.Parameters.GetValue<string>("Result");}if (callback.Parameters.ContainsKey("Msg")){var msg = callback.Parameters.GetValue<string>("Msg");MessageBox.Show("获取对话框服务返回消息:" + msg, "系统提示");}}});});}}}
}
