wpf prism 《3》弹窗 IOC

传统的弹窗这种耦合度高

new 窗体() . Show();
new 窗体() . ShowDialog();

利用Prism 自动的 IOC 弹窗的必须必须必须页面控件

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弹窗的必须必须必须页面控件
弹窗的必须必须必须页面控件
弹窗的必须必须必须页面控件
弹窗的必须必须必须页面控件
》》否则报上面的错误

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》》主程序

<Window x:Class="BlankApp2.Views.MainView"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:prism="http://prismlibrary.com/"prism:ViewModelLocator.AutoWireViewModel="True"Title="{Binding Title}" Height="350" Width="525" ><Grid><Grid.RowDefinitions><RowDefinition Height="50"></RowDefinition><RowDefinition></RowDefinition></Grid.RowDefinitions><StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="10"><Button Content="弹窗1" Command="{Binding OpenCommand}" CommandParameter="Popup"></Button><Button Content="弹窗2" Command="{Binding OpenCommand}" CommandParameter="UCPopup"></Button><!--<Button Content="模块Student" Command="{Binding OpenCommand}" CommandParameter="ViewXX"></Button><Button Content="模块C" Command="{Binding OpenCommand}" CommandParameter="ViewC"></Button><Button Content="回退" Command="{Binding BackCommand}"></Button>--></StackPanel><ContentControl Grid.Row="1" prism:RegionManager.RegionName="ContentRegion" /></Grid>
</Window>

》》主程序对应的 ViewModel

using Prism.Commands;
using Prism.Dialogs;
using Prism.Mvvm;
using Prism.Navigation;
using Prism.Navigation.Regions;
using System;
namespace BlankApp2.ViewModels
{public class MainViewModel : BindableBase{private string _title = "Prism Application";public string Title{get { return _title; }set { SetProperty(ref _title, value); }}public DelegateCommand<string> OpenCommand { get; private set; }public IDialogService DialogService { get; }public MainViewModel(IDialogService dialogService){this.DialogService = dialogService;this.OpenCommand = new DelegateCommand<string>(Open);}private void Open(string obj){//传递给弹窗的参数信息DialogParameters keys = new DialogParameters();keys.Add("zen", "============zen============");DialogService.ShowDialog(obj, keys, callback =>{if (callback.Result == ButtonResult.OK){   //弹窗传递的参数信息string ss = callback.Parameters.GetValue<string>("Info");}});}}
}

》》》弹窗用户控件、弹窗的ViewModel
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<UserControl x:Class="BlankApp2.Views.UCPopup"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:BlankApp2.Views"mc:Ignorable="d" d:DesignHeight="450" d:DesignWidth="800"><Grid><Grid.RowDefinitions><RowDefinition Height="20"></RowDefinition><RowDefinition></RowDefinition><RowDefinition Height="80"></RowDefinition></Grid.RowDefinitions><TextBlock Text="{Binding Title}"></TextBlock><TextBlock Text="弹窗信息" FontSize="40" Grid.Row="1"></TextBlock><StackPanel Orientation="Horizontal" Margin="10" HorizontalAlignment="Right" Grid.Row="2"><Button Content="确     定" Margin="10" Command="{Binding OKCommand}"></Button><Button Content="取     消" Margin="10" Command="{Binding CancelCommand}"></Button></StackPanel></Grid>
</UserControl>

using Prism.Commands;
using Prism.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace BlankApp2.ViewModels
{public class UCPopupViewModel : IDialogAware{public string Title { get; set; }public DialogCloseListener RequestClose { get; set; }public DelegateCommand CancelCommand { get; set; }public DelegateCommand OKCommand { get; set; }public UCPopupViewModel(){CancelCommand = new DelegateCommand(Cancel);OKCommand = new DelegateCommand(OKcmd);}private void OKcmd(){DialogParameters keys = new DialogParameters();keys.Add("Info", "======INDO==========");RequestClose.Invoke(keys, ButtonResult.OK);}private void Cancel(){RequestClose.Invoke(ButtonResult.Cancel);}//是否准许关闭弹窗public bool CanCloseDialog(){return true;}//弹窗关闭时【窗体哪个 X】public void OnDialogClosed(){DialogParameters keys = new DialogParameters();keys.Add("Info", "======INDO==========");RequestClose.Invoke(keys, ButtonResult.OK);//throw new NotImplementedException();}//弹窗弹出时触发public void OnDialogOpened(IDialogParameters parameters){if (parameters.ContainsKey("zen")){this.Title = parameters.GetValue<string>("zen");}//throw new NotImplementedException();}}
}