十年河东，十年河西，莫欺少年穷
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1、新建项目wpfApp6，添加Nuget引用，并初始化App.xaml 及 cs 类
app.cs 如下
public partial class App : PrismApplication
{
protected override Window CreateShell()
{
return Container.Resolve<MainView>();
}
protected override void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterDialog<UserControlA, UserControlAModel>("UserControlA");
}
}View Code
app.xaml 如下：
<Prism:PrismApplication x:Class="WpfApp6.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApp6"
xmlns:Prism="http://prismlibrary.com/" >
<Application.Resources>
</Application.Resources>
</Prism:PrismApplication>View Code
说明如下：
app.cs 中设定了启动窗体
return Container.Resolve<MainView>();app.cs 中注入了一个对话框，名称为：UserControlA ，并设定了viewModel数据上下文： UserControlAModel
containerRegistry.RegisterDialog<UserControlA, UserControlAModel>("UserControlA");2、启动窗体
启动窗体必须写在Views文件夹中，且必须以View结尾，启动窗体的viewModel必须放在ViewModels文件夹中，且必须以Model结尾
xaml
<Window x:Class="WpfApp6.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:WpfApp6.Views"
xmlns:Prism="http://prismlibrary.com/"
Prism:ViewModelLocator.AutoWireViewModel="true"
mc:Ignorable="d"
Title="MainView" Height="450" Width="800">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<Button Content="点击并弹出用户控件" Margin="5" Height="35" Width="150" Command="{Binding BtnCommand}" CommandParameter="UserControlA"></Button>
</StackPanel>
</Grid>
</Window>View Code
viewModel如下：
public class MainViewModel : BindableBase
{
/// <summary>
/// 窗体Button按钮事件，用于点击后，弹出框
/// </summary>
public DelegateCommand<string> BtnCommand { get; set; }
/// <summary>
/// 引入Prism 的 DialogService 服务，它可以弹出用户控件，或者窗体
/// </summary>
private readonly IDialogService dialogService;
public MainViewModel(IDialogService dialogService)
{
BtnCommand = new DelegateCommand<string>(open);
this.dialogService = dialogService;
}
private void open(string obj)
{
//弹框传递的参数，键值对
IDialogParameters parameters = new DialogParameters();
parameters.Add("schoolId", 1);
parameters.Add("schoolName", "河南大学");
//弹出框 并传递参数、设定弹出窗体关闭时的回调函数
dialogService.ShowDialog(obj, parameters,callback);
}
/// <summary>
/// 弹出窗体关闭时的回调函数
/// </summary>
/// <param name="result"></param>
private void callback(IDialogResult result)
{
if (result.Result == ButtonResult.OK)
{
var closeParam = result.Parameters.GetValue<string>("closeParam");
}
}
}View Code
3、弹出的用户控件
xaml
<UserControl x:Class="WpfApp6.UserControls.UserControlA"
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:WpfApp6.UserControls"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition />
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<TextBlock Text="温馨提示" FontSize="30" Grid.Row="0"/>
<TextBlock Text="我是用户控件A" FontSize="30" Grid.Row="1" TextAlignment="Center"/>
<StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Right" Margin="5">
<Button Height="30" Width="100" Content="确定" Margin="5" Command="{Binding saveCommand}"/>
<Button Height="30" Width="100" Content="取消" Margin="5" Command="{Binding cancelCommand}"/>
</StackPanel>
</Grid>
</UserControl>View Code
viewModel如下
using Prism.Commands;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WpfApp6.UserControlModels
{
/// <summary>
/// 被弹出的框，用户控件
/// </summary>
public class UserControlAModel : IDialogAware
{
public string Title { get; set; }
/// <summary>
/// 关闭窗体请求事件
/// </summary>
public event Action<IDialogResult> RequestClose;
/// <summary>
/// 保存按钮事件
/// </summary>
public DelegateCommand saveCommand { get; set; }
/// <summary>
/// 取消按钮事件
/// </summary>
public DelegateCommand cancelCommand { get; set; }
public UserControlAModel()
{
this.Title = "用户控件A";
saveCommand = new DelegateCommand(save);
cancelCommand = new DelegateCommand(cancel);
}
/// <summary>
/// 保存，关闭窗体，并传值给主窗体
/// </summary>
private void save()
{
OnDialogClosed();
}
/// <summary>
/// 取消，直接关闭窗体
/// </summary>
private void cancel()
{
RequestClose.Invoke(new DialogResult(ButtonResult.No));
}
/// <summary>
/// 是否可关闭窗体，可以写一些业务逻辑，这里直接返回True
/// </summary>
/// <returns></returns>
public bool CanCloseDialog()
{
return true;
}
/// <summary>
/// 关闭窗体，并传值给主窗体
/// </summary>
public void OnDialogClosed()
{
IDialogParameters parameters = new DialogParameters();
parameters.Add("closeParam", "我是closeParam值");
RequestClose?.Invoke(new DialogResult(ButtonResult.OK, parameters));
}
/// <summary>
/// 窗体打开后，接收主窗体传递的参数，并赋值给窗体的Title属性
/// </summary>
/// <param name="parameters"></param>
public void OnDialogOpened(IDialogParameters parameters)
{
var schoolName = parameters.GetValue<string>("schoolName");
var Id = parameters.GetValue<int>("Id");
this.Title = schoolName + "_" + Id;
}
}
}View Code
4、消息发布与订阅
新建Event文件夹并创建如下类
public class MessageEvent : PubSubEvent<string>
{
}发布消息
/// <summary>
/// 窗体Button按钮事件，用于点击后，弹出框
/// </summary>
public DelegateCommand<string> BtnCommand { get; set; }
/// <summary>
/// 引入Prism 的 DialogService 服务，它可以弹出用户控件，或者窗体
/// </summary>
private readonly IDialogService dialogService;
/// <summary>
///
/// </summary>
private readonly IEventAggregator aggregator;
public MainViewModel(IDialogService dialogService, IEventAggregator _aggregator)
{
BtnCommand = new DelegateCommand<string>(open);
this.dialogService = dialogService;
this.aggregator = _aggregator;
}
private void open(string obj)
{
//弹框传递的参数，键值对
IDialogParameters parameters = new DialogParameters();
parameters.Add("schoolId", 1);
parameters.Add("schoolName", "河南大学");
//发布一个消息
aggregator.GetEvent<MessageEvent>().Publish("hello 陈大六");
//弹出框 并传递参数、设定弹出窗体关闭时的回调函数
dialogService.ShowDialog(obj, parameters,callback);
}
订阅消息
public UserControlA(IEventAggregator aggregator)
{
var evn = aggregator.GetEvent<MessageEvent>().Subscribe(callback =>
{
MessageBox.Show(callback);
});
InitializeComponent();
}
@天才卧龙的博尔乐