Question

使用： WPF，Prism 5，Unity

我正在尝试编写我称之为＆＃34; WindowDialogService＆＃34;当传递一个类型并被调用时，它将打开一个窗口，该类型作为内容。我的问题是我无法让ViewModel实例化并关联到View。

我不知道它是否正确，但我在我的视图中使用import { Component } from '@angular/core'; @Component({ selector: 'my-app', template: ` Select your favorite serie: <select (change)="onChange($event.target.value)"> <option *ngFor="let serie of series" [value]="serie.id">{{ serie.name }}</option> </select> <br /> <br /> Selected Serie: <br /> <span *ngIf="selectedSerie"> {{ selectedSerie.id }} - {{ selectedSerie.name }} </span> ` }) export class AppComponent { private series: any[]; private selectedSerie: any; constructor() { this.series = [ { id: 1, name: 'Friends' }, { id: 2, name: 'How I met Your Mother' }, { id: 3, name: 'Modenr Family' } ]; this.selectedSerie = this.series[0]; } onChange(serieId: any): void { this.selectedSerie = this.series.find(serie => serie.id == serieId); } }，并假设（显然不正确）ViewModel将位于＆＃34;位于＆＃34;使用Unity容器进行解析时，即AutoWireViewModel

基本上，我可以解析View，但视图的DataContext为null。

我已在下面提供了所有相关代码。

查看

container.TryResolve <T> ()

视图模型

<dxc:DXWindow x:Class="ListClassList.Views.AddToClassView"
             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"
              xmlns:dxe="clr-namespace:DevExpress.Xpf.Editors.Settings;assembly=DevExpress.Xpf.Core.v15.2"
              xmlns:dxeditors="http://schemas.devexpress.com/winfx/2008/xaml/editors"
              xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/core" 
              xmlns:dxgt="http://schemas.devexpress.com/winfx/2008/xaml/grid/themekeys"
             xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"              
             xmlns:extToolkit="http://schemas.xceed.com/wpf/xaml/toolkit"
                    WindowStartupLocation="CenterScreen"
                    dxc:ThemeManager.ThemeName="VS2010"
                    Title="{Binding Title}"
                    Width="800"
                    Height="500"
              ResizeMode="CanResizeWithGrip"
             >
    <Grid>
    </Grid>
</dxc:DXWindow>

IWindowDialogService接口

using MyApp.Data;
using MyApp.Models.Model;
using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;

namespace ListClassList.ViewModels
{
    public class AddToClassViewViewModel : BindableBase
    {
        private readonly MyAppDbContext _context;

        private ObservableCollection<MasterClass> _masterClasses;
        public ObservableCollection<MasterClass> MasterClasses
        {
            get { return _masterClasses; }
            set { SetProperty(ref _masterClasses, value); }
        }

        private ObservableCollection<Student> _students;
        public ObservableCollection<Student> Students
        {
            get { return _students; }
            set
            {
                SetProperty(ref _students, value);
            }
        }


        public DelegateCommand FinishCommand { get; set; }


        public AddToClassViewViewModel(IStudentTimetableService studentTimetableService)
        {


        }

    }
}

WindowDialogService实施

using System;
using System.Windows;
    namespace MyApp.Infrastructure.Services.Dialogs.WindowDialog
    {
        public interface IWindowDialogService
        {
            bool? ShowDialog<T>(Action onDialogClosed) where T : Window;
        }
    }

Answer 1

Prism 6会自动执行此操作，对于Prism 5，您需要一些符合

的内容

ViewModelLocationProvider.SetDefaultViewModelFactory( type => Container.Resolve( type ) );

在你的引导程序ConfigureContainer

中

Prism 5和Unity - 使用ViewModel手动解析View

1 个答案: