SelectedItem设置为具有CollectionViewSource的第一个项目 [英] SelectedItem set to first item with CollectionViewSource

问题描述

我有一个通过mvvm light绑定到WP7项目中的viewmodel的视图数据. 该视图包含具有以下设置的列表框:

I have a view databound through mvvm light to a viewmodel in my WP7 project. The view contains a Listbox with following settings:

<ListBox x:Name="StationList"
    ItemsSource="{Binding StationList}"
    SelectedItem="{Binding SelectedStation, Mode=TwoWay}"
    >

StationList是一个ObservableCollection.

The StationList is a ObservableCollection.

现在，当加载视图时，一切看起来都很棒！显示列表，并且未选择任何项目！

Now when the view gets loaded, everything looks great! The list is shown and NO item is selected!

但是当我将XAML更改为:

But when I change the XAML to:

<ListBox x:Name="StationList"
            ItemsSource="{Binding Source={StaticResource StationListSorted}}"
            SelectedItem="{Binding SelectedStation, Mode=TwoWay}"
            >

StationListSorted是StationList上的一个简单属性，它作为CollectionViewSource进行排序. 现在事情变得丑陋了！ 相同的视图在列表框中加载了相同的项目，但现在已正确排序，但是选择了第一个项目并设置了selectedItem属性！

With the StationListSorted being a simple one property sort on the StationList as a CollectionViewSource. Now things turn ugly!! The same view is loaded with the same items in the listbox, but now correctly sorted, BUT the first item is selected and the selectedItem property is set!!

如何在不自动选择第一项的情况下对具有CollectionViewSource的ListBox进行排序?

How can I sort a ListBox with a CollectionViewSource WITHOUT it auto selecting my first item?

推荐答案

在列表框上，尝试设置IsSynchronizedWithCurrentItem并查看哪个值(正确或错误)产生所需的效果.

On your listbox, try setting IsSynchronizedWithCurrentItem and see which value (either true or false) produces the desired effect.

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