将ObservableCollection作为ItemsControl的ItemsSource连接 [英] Attaching ObservableCollection as ItemsSource of ItemsControl

问题描述

我有一个这样的对象：

class RCLocation : INotifyPropertyChanged
{
    private string _id;
    private string _name;
    private bool _checked;

    public string Id { /* get/set with NotifyPropertyChanged() */ }
    public string Name  { /* get/set with NotifyPropertyChanged() */ }
    public bool Checked { /* get/set with NotifyPropertyChanged() */ }

    /* INotifyPropertyChanged implementation methods */
}

现在在我的MainWindow.xaml中，我有一个ItemsControl，如下所示：

Now in my MainWindow.xaml I have an ItemsControl like so:

<ItemsControl Name="lstDropOff" ScrollViewer.VerticalScrollBarVisibility="Auto">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <CheckBox IsChecked="{Binding Checked, Mode=TwoWay}"/>
                <TextBlock Text="{Binding Name}"/>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

我将代码中的数据绑定到这个列表中，如下所示：

I bind the data to this list in my code behind like so:

ObservableCollection<RCLocation> dropOffs = new ObservableCollection<RCLocation>();
lstDropOff.ItemsSource = dropOffs;
dropOffs.Add(new RCLocation { /* some data here */ });
dropOffs.Add(new RCLocation { /* some data here */ });
dropOffs.Add(new RCLocation { /* some data here */ });
dropOffs.Add(new RCLocation { /* some data here */ });

我刚刚添加的项目不会显示在ItemsControl中。我究竟在做错什么？不能弄清楚：/

感谢您的帮助。

The items I have just added do not show in the ItemsControl. What exactly am I doing wrong? Can't figure it out :/
Thanks for help.

推荐答案

您尚未设置 ItemsSource 使用绑定，您需要执行此操作才能涉及WPF绑定引擎，并使控件对数据源更改做出反应。

You have not set the ItemsSource using a binding, which you need to do in order to involve the WPF binding engine and have the control react to data source changes.

以下是代码隐藏的方法：

Here's how to do that from code-behind:

// instead of lstDropOff.ItemsSource = dropOffs
var binding = new Binding() { Source = dropOffs };
lstDropOff.SetBinding(ItemsControl.ItemsSourceProperty, binding);

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