uwp下用mvvmlight，一个listview绑定了一组对象，设置为multiple，想再通过按钮控制全选、反选、全不选，不知如何实现？

cjs1389 2016-05-07 03:41:14

uwp下用mvvmlight，一个listview绑定了一组对象，设置为multiple，想再通过按钮控制全选、反选、全不选，不知如何实现？
请大神赐教，谢谢！

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cjs1389 2016-05-07

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基本代码如下：不知道如何处理，请各位大神帮忙，谢谢啦 <local:ListViewEx x:Name="lvEx" Grid.Row="1" IsItemClickEnabled="True" SelectionMode="Multiple" SelectedIndex="-1" ItemsSource="{x:Bind VM.RecordList, Mode=OneWay}" Margin="20,4" SelectionChanged="{x:Bind VM.SelectionChanged}" AddMoreEvent="{x:Bind VM.AddMoreEvent}" ScrollViewer.VerticalScrollMode="Enabled"> <local:ListViewEx.ItemTemplate> <DataTemplate x:DataType="local:MyRecord"> <StackPanel Orientation="Vertical"> <TextBlock Text="{x:Bind Title, Mode=OneWay}" FontWeight="Bold"/> <TextBlock Text="{x:Bind Content, Mode=OneWay}"/> </StackPanel> </DataTemplate> </local:ListViewEx.ItemTemplate> </local:ListViewEx> <StackPanel Orientation="Vertical" BorderBrush="Gray" BorderThickness="1" Margin="1" VerticalAlignment="Bottom"> <Button Background="Pink" Margin="1" Command="{x:Bind VM.DeselectAllCommand}" Visibility="{x:Bind VM.VisibleSelectMenu,Mode=OneWay}"> <StackPanel Orientation="Horizontal"> <Image Source="/Assets/Check_None.png" Width="32"/> <TextBlock x:Uid="LabelDeselectAll" VerticalAlignment="Center"/> </StackPanel> </Button> <Button Background="Pink" Margin="1" Command="{x:Bind VM.InverseCommand}" Visibility="{x:Bind VM.VisibleSelectMenu,Mode=OneWay}"> <StackPanel Orientation="Horizontal"> <Image Source="/Assets/Check_Invert.png" Width="32"/> <TextBlock x:Uid="LabelInverse" VerticalAlignment="Center"/> </StackPanel> </Button> <Button Background="Pink" Margin="1" Command="{x:Bind VM.SelectAllCommand}" Visibility="{x:Bind VM.VisibleSelectMenu,Mode=OneWay}"> <StackPanel Orientation="Horizontal"> <Image Source="/Assets/Check_All.png" Width="32"/> <TextBlock x:Uid="LabelSelectAll" VerticalAlignment="Center"/> </StackPanel> </Button> <Button Margin="1" Command="{x:Bind VM.SelectCommand}" Visibility="{x:Bind VM.VisibleSelect,Mode=OneWay}"> <StackPanel Orientation="Horizontal"> <Image Source="/Assets/Check.png" Width="32"/> <TextBlock x:Uid="LabelSelect" VerticalAlignment="Center"/> </StackPanel> </Button> </StackPanel>

cjs1389 2016-05-07