Question

我正在开发一款win 8应用程序。我在datatemlate中有一个带有combobox的列表视图。现在当我滚动listview时出现问题，当滚动listview组合框selectedValueChanged事件时，组合框丢失了selectedvalue。

<ListView x:Name="lstQuestion" Margin="0 10 0 0" SelectionMode="None"                         
    ItemsSource="{Binding QuestionsViewModel.AuditQuestionList}" IsItemClickEnabled="True" >
    <ListView.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Vertical" Margin="10 0 0 0">
                <TextBlock Text="{Binding QuestionText}" Padding="14,10,10,10" FontSize="14" TextWrapping="Wrap"/>
                <StackPanel Orientation="Horizontal">

                    <Rectangle ToolTipService.ToolTip="{Binding QuestionText}" x:Name="rectAnswerColor"  Fill="{Binding ProgressColor, Converter={StaticResource HexToSolidColorConverter}}" Width="5" Height="40"/>
                    <ComboBox x:Name="cmbanswer" Margin="10 0 0 0"   Height="40" HorizontalAlignment="Left" Width="200" ItemsSource="{Binding PossibleAnswerList}" Visibility="{Binding QuestionType, Converter={StaticResource IntToVisibility1}}" SelectionChanged="cmbanswer_SelectionChanged_1" />

                    <TextBox x:Name="txtAnswer" Margin="10 0 0 0" Height="40" Width="200" Visibility="{Binding QuestionType, Converter={StaticResource IntToVisibility2}}" LostFocus="txtAnswer_LostFocus_1"/>

                    <Image x:Name="imgcamera" Source="/Assets/camera.png" Height="35" Width="30" Margin="15 0 0 0" Tapped="imgcamera_Tapped_1"/>

                    <Border x:Name="brdBackground" Margin="-8 -20 0 0" Background="Red" CornerRadius="10" Height="22" Width="22" >
                        <TextBlock x:Name="tblImageCount" Text="+"  Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="12"/>
                    </Border>

                    <Image x:Name="imgnote" Source="/Assets/notepad.png" Height="30" Width="30" Margin="15 0 0 0" Tapped="imgnote_Tapped"/>
                </StackPanel>
            </StackPanel>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

有什么问题吗？

Answer 1

尝试在ComboBox.IsDropDownOpen == true

时禁用ListView的滚动属性

Answer 2

我为listview添加了一个scrollviewer，它可以工作。滚动时列表视图发生的事情，重绘不可见的项目或其他东西。无论如何，谢谢你的回复。

滚动列表视图时，组合框丢失选定的值

2 个答案: