xaml 无法识别模型的属性 (WPF MVVM)

Question

使用mvvmCross， .net (5.0)， visual studio 19

视图模型:

using System.ComponentModel;
using System.Threading.Tasks;
using MvvmCross.ViewModels;
using MvxR_M_S.Core.API;
using MvxR_M_S.Core.Models;
namespace MvxR_M_S.Core.ViewModels
{
public class ArticlePresentationViewModel : MvxViewModel
{
public ArticlePresentationViewModel()
{
}
public override async void ViewAppeared()
{
base.ViewAppeared();
await LoadArticles(new ArticleEndpoint(new APIHelper()));
}
public async Task LoadArticles(ArticleEndpoint articleEndpoint)
{
var articleList = await articleEndpoint.GetAll();
Articles = new BindingList<ArticleModel>(articleList);
}
private BindingList<ArticleModel> _articles;
public BindingList<ArticleModel> Articles
{
get { return _articles; }
set
{
_articles = value;
SetProperty(ref _articles, value);
}
}
}
}

模型:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MvxR_M_S.Core.Models
{
public class ArticleModel
{
public string ArticleName { get; set; }
}
}

视图:

<views:MvxWpfView
xmlns:views="clr-namespace:MvvmCross.Platforms.Wpf.Views;assembly=MvvmCross.Platforms.Wpf"
xmlns:mvx="clr-namespace:MvvmCross.Platforms.Wpf.Binding;assembly=MvvmCross.Platforms.Wpf"
x:Class="MvxR_M_S.Wpf.Views.ArticlePresentationView"
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:models="clr-namespace:MvxR_M_S.Core.Models;assembly=MvxR_M_S.Core"
xmlns:viewModels="clr-namespace:MvxR_M_S.Core.ViewModels;assembly=MvxR_M_S.Core"
mc:Ignorable="d" FontSize="20" Background="Wheat"
d:DesignHeight="450" d:DesignWidth="800">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="20" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="20" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="20" />
</Grid.RowDefinitions>
<TextBlock Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1" HorizontalAlignment="Center" Text="Article list" />
<ListBox x:Name="Articles" ItemsSource="{Binding Articles}" Grid.Column="2" Grid.Row="2" MinHeight="300" MinWidth="300" >
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding ArticleName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</views:MvxWpfView>

问题在列表框，它引用了ItemsSource是的，我也在文章中进行了调试。属性，它保存正确的信息，但是当启动时屏幕上没有显示任何内容。

所以我猜这是绑定问题。

Answer 1

删除条目设置中的_articles = value;。如果字段已经设置，SetProperty不做任何事情

public BindingList<ArticleModel> Articles
{
get { return _articles; }
set
{
SetProperty(ref _articles, value);
}
}

Answer 2

既然你在一个单独的线程中检索文章，我认为你必须这样做:

Dispatcher.BeginInvoke(new Action(() =>  Articles = new BindingList<ArticleModel>(articleList);));

我不确定这是否是正确的方式，但Dispatcher.BeginInvoke似乎需要从我发现