WPF MVVM 获取List 多选数据

单选绑定

使用 SelectedIndex 或 SelectedItem 都可以

<ListBox x:Name="dataGrid1" SelectedIndex="{Binding SelectedIndex}" SelectedItem="{Binding SelectedItem}">
</ListBox>

多选绑定

要先添加依赖项 System.Windows.Interactivity.dll

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"




<ListBox x:Name="dataGrid1">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="SelectionChanged">
        <i:InvokeCommandAction Command="{Binding SelectionChangeCommand}" CommandParameter="{Binding SelectedItems,ElementName=dataGrid1}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</ListBox>