WP8 LongListMultiSelector - 不绑定

Question

我的项目中有 LongListMultiSelector，它与 ListProductInRecipe2P 绑定。当我使用 LongListMultiSelector 加载页面时，列表正在加载，但是当我想删除项目时 LongListMultiSelector 不是更新。

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这是我的代码： XAML：

<toolkit:LongListMultiSelector x:Name="ListProductsSelectedItems" ItemsSource="{Binding ListProductInRecipe2P}">
    <toolkit:LongListMultiSelector.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Name}"  Style="{StaticResource PhoneTextGroupHeaderStyle}"></TextBlock>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding Size}" Style="{StaticResource PhoneTextNormalStyle}"></TextBlock>
                    <TextBlock Text="{Binding Type}" Style="{StaticResource PhoneTextNormalStyle}"></TextBlock>
                </StackPanel>
            </StackPanel>
        </DataTemplate>
    </toolkit:LongListMultiSelector.ItemTemplate>
</toolkit:LongListMultiSelector>

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C#（代码后面）：

private void DelProducts_Click(object sender, EventArgs e)
{
    var list = ListProductsSelectedItems.SelectedItems;
    for (int i = 0; i < list.Count; i++)
    {
        var temp = list[i] as Fridge;
        App.ViewModel.ListProductInRecipe2P.Remove(temp);
    }
}

和 C#（视图模型）：

private List<Fridge> ListProductInRecipe2;
public List<Fridge> ListProductInRecipe2P 
{
    get { return ListProductInRecipe2;}
    set
    {
        ListProductInRecipe2 = value;
        changeValue("ListProductInRecipe2P");
    }
}

Answer 1

改用 ObservableCollection。它会为你引发 INotifyProperty 事件。

了解更多@MSDN ObservableCollection Class

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using System.Collections.ObjectModel;

private ObservableCollection<Fridge> ListProductInRecipe2;
public ObservableCollection<Fridge> ListProductInRecipe2P 
{
    get { return ListProductInRecipe2;}
    set
    {
        ListProductInRecipe2 = value;
        // changeValue("ListProductInRecipe2P");
    }
}