C# WPF列表框绑定更新

我是WPF的新手，我刚刚设法将特定类项的列表绑定到一个列表框。列表框现在成功地显示它们。下面是一些代码，首先是类：

public class OrderItem
{
    public int Quantity { get; set; }
    public string Name { get; set; }
    public Double Price { get; set; }
}

一些虚拟数据和绑定，这些都发生在主程序的构造函数中：

List<OrderItem> currentOrderItems = new List<OrderItem>();
        currentOrderItems.Add(new OrderItem() { Quantity = 5, Name = "Test", Price = 5 });
        currentOrderItems.Add(new OrderItem() { Quantity = 15, Name = "Test test", Price = 6.66 });
        currentOrderItems.Add(new OrderItem() { Quantity = 1, Name = "Test 3", Price = 15.88 });
        listOrderItems.ItemsSource = currentOrderItems;

List currentOrderItems=new List（）；
currentOrderItems.Add（newOrderItem（）{Quantity=5，Name=“Test”，Price=5}）；
currentOrderItems.Add（newOrderItem（）{Quantity=15，Name=“Test”，Price=6.66}）；
currentOrderItems.Add（newOrderItem（）{Quantity=1，Name=“Test 3”，Price=15.88}）；
listOrderItems.ItemsSource=currentOrderItems；

以及XAML：

<ListBox HorizontalAlignment="Left" Margin="150,27,0,23" Name="listOrderItems" Width="150" FontFamily="Times New Roman" FontSize="12">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid Margin="4">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <TextBlock Text="{Binding Quantity}" FontWeight="Bold"  />
                    <TextBlock Grid.Column="1" Text="{Binding Name }" />
                    <TextBlock Grid.Column="2" Text="{Binding Price }" />
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

<ListBox HorizontalAlignment="Left" Margin="150,27,0,23" Name="listOrderItems" Width="150" FontFamily="Times New Roman" FontSize="12">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <Grid Margin="4">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="Auto" />
                </Grid.ColumnDefinitions>
                <TextBlock Text="{Binding Quantity}" FontWeight="Bold"  />
                <TextBlock Grid.Column="1" Text="{Binding Name }" />
                <TextBlock Grid.Column="2" Text="{Binding Price }" />
            </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

我的问题是如何更新列表框以显示我正在添加到包含OrderItems数据的列表中的新项目。如果我以任何方式添加、删除或修改列表，这不会反映在列表框中。

---

谢谢

不要使用

列表

使用

可观察收集

。这将通知您添加/删除了某些内容，以便您的列表框知道如何刷新

---

此外，您的

OrderItem

需要实现

INotifyPropertyChanged

，您的设置者需要调用

OnPropertyChanged

，为您的案例提供使用mvvm模式的最佳方式。 简言之： 您的模型OrderItem应该实现接口INotifyPropertyChanged。 如果属性发生更改，它会通知您。 然后创建viewmodel并在datacontext中进行设置。在带有OrderItems的viewModel addObservableCollection中，此集合应通知视图其中的更改。

---

有关更多信息，请阅读以下文章：

您还可以在代码隐藏中重新绑定列表框：

List<OrderItem> currentOrderItems = new List<OrderItem>();
currentOrderItems.Add(new OrderItem() { Quantity = 5, Name = "Test", Price = 5 });
currentOrderItems.Add(new OrderItem() { Quantity = 15, Name = "Test test", Price = 6.66 });
currentOrderItems.Add(new OrderItem() { Quantity = 1, Name = "Test 3", Price = 15.88 });

private ObservableCollection<OrderItem> _OrderItemCollection;
public ObservableCollection<OrderItem> OrderItemCollection
{
    get
    {
        if (_OrderItemCollection == null)
            _OrderItemCollection = new ObservableCollection<OrderItem>();
        return _OrderItemCollection;
    }
    set => _OrderItemCollection = value;
}

private CollectionViewSource _OrderItemCollectionViewSource;
public ICollectionView OrderItemCollectionViewSource => _OrderItemCollectionViewSource.View;


public void loadData()
{
    _OrderItemCollectionViewSource = new CollectionViewSource();
    _OrderItemCollectionViewSource.Source = new ObservableCollection<OrderItem>(currentOrderItems) ;
    Binding b = new Binding("OrderItemCollectionViewSource") { Source = this };
    listOrderItems.SetBinding(ListBox.ItemsSourceProperty, b);
}

List currentOrderItems=new List（）；
currentOrderItems.Add（newOrderItem（）{Quantity=5，Name=“Test”，Price=5}）；
currentOrderItems.Add（newOrderItem（）{Quantity=15，Name=“Test”，Price=6.66}）；
currentOrderItems.Add（newOrderItem（）{Quantity=1，Name=“Test 3”，Price=15.88}）；

在代码隐藏中：

List<OrderItem> currentOrderItems = new List<OrderItem>();
currentOrderItems.Add(new OrderItem() { Quantity = 5, Name = "Test", Price = 5 });
currentOrderItems.Add(new OrderItem() { Quantity = 15, Name = "Test test", Price = 6.66 });
currentOrderItems.Add(new OrderItem() { Quantity = 1, Name = "Test 3", Price = 15.88 });

private ObservableCollection<OrderItem> _OrderItemCollection;
public ObservableCollection<OrderItem> OrderItemCollection
{
    get
    {
        if (_OrderItemCollection == null)
            _OrderItemCollection = new ObservableCollection<OrderItem>();
        return _OrderItemCollection;
    }
    set => _OrderItemCollection = value;
}

private CollectionViewSource _OrderItemCollectionViewSource;
public ICollectionView OrderItemCollectionViewSource => _OrderItemCollectionViewSource.View;


public void loadData()
{
    _OrderItemCollectionViewSource = new CollectionViewSource();
    _OrderItemCollectionViewSource.Source = new ObservableCollection<OrderItem>(currentOrderItems) ;
    Binding b = new Binding("OrderItemCollectionViewSource") { Source = this };
    listOrderItems.SetBinding(ListBox.ItemsSourceProperty, b);
}

私有ObservableCollection\u OrderItemCollection；
公共ObservableCollection OrderItemCollection
{
得到
{
如果（_OrderItemCollection==null）
_OrderItemCollection=新的ObservableCollection（）；
return\u OrderItemCollection；
}
set=>\u OrderItemCollection=value；
}
private CollectionViewSource _OrderItemCollectionViewSource；
公共ICollectionView OrderItemCollectionViewSource=>\u OrderItemCollectionViewSource.View；
公共void loadData（）
{
_OrderItemCollectionViewSource=新的CollectionViewSource（）；
_OrderItemCollectionViewSource.Source=新的ObservableCollection（currentOrderItems）；
绑定b=新绑定（“OrderItemCollectionViewSource”）{Source=this}；
listOrderItems.SetBinding（ListBox.ItemsSourceProperty，b）；
}

以及XAML：

<ListBox HorizontalAlignment="Left" Margin="150,27,0,23" Name="listOrderItems" Width="150" FontFamily="Times New Roman" FontSize="12">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Grid Margin="4">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <TextBlock Text="{Binding Quantity}" FontWeight="Bold"  />
                    <TextBlock Grid.Column="1" Text="{Binding Name }" />
                    <TextBlock Grid.Column="2" Text="{Binding Price }" />
                </Grid>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

<ListBox HorizontalAlignment="Left" Margin="150,27,0,23" Name="listOrderItems" Width="150" FontFamily="Times New Roman" FontSize="12">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <Grid Margin="4">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="Auto" />
                </Grid.ColumnDefinitions>
                <TextBlock Text="{Binding Quantity}" FontWeight="Bold"  />
                <TextBlock Grid.Column="1" Text="{Binding Name }" />
                <TextBlock Grid.Column="2" Text="{Binding Price }" />
            </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

谢谢你们两位的帮助！另外，在绑定一些动态人员时，不要忘记将绑定的NotifyOnSourceUpdated和NotifyOnTargetUpdated属性设置为

true