UWP 中带有子目录的 Prism Auto ViewModelLocator

Question

我不知道这是否是个好习惯，但我想在目录 "Views" 和 "ViewModels"

中使用子目录

我现在有这个代码

namespace Project.Universal.ViewModels.Sales
{
    public class SalesListViewModel:ViewModelBase
    {
        // Properties
        private string _test;
        private ICollection<Sale> _sales;

        public string Test
        {
            get => _test;
            set => SetProperty(ref _test, value);
        }

        public ICollection<Sale> Sales {
            get => _sales;
            private set
            {
            }
        }

        // Services
        private readonly IStandardService<Sale> _salesService;

        // Commands
        public DelegateCommand Update { get;}

        // Constructor
        public SalesListViewModel(IStandardService<Sale> salesService)
        {


            Debug.WriteLine(">>>> Initializing SalesListViewModel, trying to set _salesService.");
            _salesService = salesService;

            Debug.WriteLine(">>>> Delegating command to update SalesListViewModel.");
            Update = new DelegateCommand(async () =>
            {
                Sales = await _salesService.GetAsync();
                Test = "Test";
            });
        }

    }
}

这是我的浏览页面

<mvvm:SessionStateAwarePage
    x:Class="Project.Universal.Views.Sales.SalesListPage"
    mvvm:ViewModelLocator.AutoWireViewModel="True"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Project.Universal.Views.Sales"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    xmlns:mvvm="using:Prism.Windows.Mvvm"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <Grid Margin="{StaticResource MediumLeftTopRightBottomMargin}">
        <TextBlock>this is the Sales page</TextBlock>
        <TextBlock Text="{Binding Test}"></TextBlock>
    </Grid>
</mvvm:SessionStateAwarePage>

但是 Prism 没有正确注入视图模型。 Unline this，Prism Framework 正在注入 ShellViewModel，就像下面的错误说：

Error: BindingExpression path error: 'Test' property not found on 'Project.Universal.ViewModels.ShellViewModel'. BindingExpression: Path='Test' DataItem='Project.Universal.ViewModels.ShellViewModel'; target element is 'Windows.UI.Xaml.Controls.TextBlock' (Name='null'); target property is 'Text' (type 'String')

对于组织，我想对文件夹使用这种模式：

Views/Context/ViewPage.xaml for views
ViewModels/Context/ViewModel.cs for viewModels

我使用的模板来自 Windows Template Studio 和 Prism 6.3 框架。对不起我的英语。

Answer 1

下班后我解决了我的问题：

Windows Template Studio 已更改 ViewModelLocationProvider.SetDefaultViewTypeToViewModelTypeResolver() 方法以保持与其他框架的兼容性。我只是按照我的意愿更改了此方法并且有效。对于其他有同样问题的人，这里是代码。

Class App.xaml.cs

    protected override async Task OnInitializeAsync(IActivatedEventArgs args)
        {
            await ThemeSelectorService.InitializeAsync().ConfigureAwait(false);

            ViewModelLocationProvider.SetDefaultViewTypeToViewModelTypeResolver((viewType) =>
            {
                var viewName = viewType.FullName; // get full type name
                var viewModelName = viewName
                    .Substring(0, viewName.Length - 4)
                    .Replace(".Views.", ".ViewModels.");
                var viewModelAssembly = viewType.GetTypeInfo().Assembly.FullName;
                //var viewModel
                var viewModelTypeName = string.Format(CultureInfo.InvariantCulture, "{0}ViewModel, Project.Universal", viewModelName);

                return Type.GetType(viewModelTypeName);
            });
            await base.OnInitializeAsync(args);
        }

UWP 中带有子目录的 Prism Auto ViewModelLocator

Prism Auto ViewModelLocator with Subdirectories in UWP

prism

mvvm

uwp

windows-10-universal

prism-6