Question

我有一个列表视图，显示在用户界面上看不到的驱动程序。通过使用此列表视图，可以再次显示它们。功能完美，但为了给最终用户一些清晰的选择驱动程序，我想将listviewitem的背景颜色更改为黄色（例如）。如果他们再次选择此listviewitem，我想将背景颜色更改为正常。

这是我视图中的代码：

        <ListView  Margin="10,10,10,10" x:Name="lstViewCollapsedDrivers" ItemsSource="{Binding CollapsedDrivers}" Grid.Row="1" Grid.Column="2"
                  ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Auto" SelectionChanged="LstViewCollapsedDrivers_OnSelectionChanged">

            <i:Interaction.Triggers>
                <i:EventTrigger SourceName="lstViewCollapsedDrivers" EventName="MouseUp">
                    <i:InvokeCommandAction Command="{Binding SelectCollapsedDriverCommand}" CommandParameter="{Binding ElementName=lstViewCollapsedDrivers, Path=SelectedItem}"/>
                </i:EventTrigger>
            </i:Interaction.Triggers>

            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="Height" Value="50"/>
                    <Style.Triggers>  
                        <DataTrigger Binding="{Binding Path=RowSelected}" Value="True">
                            <Setter Property="Background" Value="Yellow"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </ListView.ItemContainerStyle>

            <ListView.View>
                <GridView>
                    <GridViewColumn DisplayMemberBinding="{Binding Name}">
                        <GridViewColumnHeader Style="{StaticResource gridViewColumnHeaderStyle}" Content="Name"/>
                    </GridViewColumn>

                    <GridViewColumn DisplayMemberBinding="{Binding Haulier}">
                        <GridViewColumnHeader Style="{StaticResource gridViewColumnHeaderStyle}" Content="Haulier"/>
                    </GridViewColumn>

                    <GridViewColumn DisplayMemberBinding="{Binding Plate}">
                        <GridViewColumnHeader Style="{StaticResource gridViewColumnHeaderStyle}" Content="Plate"/>
                    </GridViewColumn>

                    <GridViewColumn DisplayMemberBinding="{Binding Telephone}">
                        <GridViewColumnHeader Style="{StaticResource gridViewColumnHeaderStyle}" Content="Telephone"/>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>

问题是，ListView.Items现在是Driver类型而不是ListViewItem（我认为是这样的：ItemsSource =“{Binding CollapsedDrivers}”）。我尝试了很多东西，但我没办法将这些项解析回ListViewItems。

我还添加了一些代码（实际上我试图避免这种情况，但如果没有别的办法......）。

  private void LstViewCollapsedDrivers_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var test = sender as ListView;
        var lstviewItem = test.SelectedItem ; // This is of type driver...
    }


  private void LstViewCollapsedDrivers_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var test = sender as ListView;
        var lstviewItem = test.SelectedItem as ListViewItem; // This is null...
    }

任何人都知道如何解决这个问题？谢谢:)）

Answer 1

您可以使用ItemContainerGenerator.ContainerFromItem方法从ListViewItem对象生成Driver：

private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ListView listView = sender as ListView;
    Driver selectedDriver = listView.SelectedItem ; 
    ListViewItem item = (ListViewItem)
        listView.ItemContainerGenerator.ContainerFromItem(selectedDriver);
}

ListView.Items在ListView - WPF中始终为ListViewItem

1 个答案: