以下是我的代码:
<Grid>
    <ScrollViewer Grid.Row="0" Grid.Column="1" HorizontalScrollBarVisibility="Disabled">
        <StackPanel Orientation="Vertical">
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
                <TextBox MinWidth="80" Name="tbTodoName" Margin="5, 2"/>
                <Button Content="Add" Height="30" Margin="5, 0"/>
            </StackPanel>
            <ListBox Name="lstTodo" ItemsSource="{Binding}" BorderThickness="0" Padding="0" ItemTemplate="{StaticResource TodoTemplate}" ScrollViewer.HorizontalScrollBarVisibility="Disabled" HorizontalAlignment="Stretch">
            </ListBox>
        </StackPanel>
    </ScrollViewer>
</Grid>下面是这个程序的样子:

如图所示,在ListBox周围显示了一个框架。我不明白为什么,因为我设置了BorderThickness和Padding = "0“。
有人能帮我吗?
发布于 2021-03-30 19:48:50
您已经设置了一个自定义ItemTemplate,它仅应用于项。
您还需要应用模板:
    <Grid>
        <ScrollViewer Grid.Row="0" Grid.Column="1" HorizontalScrollBarVisibility="Disabled">
            <StackPanel Orientation="Vertical">
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
                    <TextBox MinWidth="80" Name="tbTodoName" Margin="5, 2"/>
                    <Button Content="Add" Height="30" Margin="5, 0"/>
                </StackPanel>
                <ListBox Name="lstTodo" ItemsSource="{Binding}" BorderThickness="0" Padding="0" ItemTemplate="{StaticResource TodoTemplate}" Template={StaticResource ListBoxNoBorder} 
ScrollViewer.HorizontalScrollBarVisibility="Disabled" HorizontalAlignment="Stretch">
                </ListBox>
            </StackPanel>
        </ScrollViewer>
    </Grid>在你的资源字典中:
<ControlTemplate x:Key="ListBoxNoBorder" TargetType="{x:Type ListBox}">
    <Border BorderBrush="Transparent" BorderThickness="0">
        <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
    </Border>
</ControlTemplate>https://stackoverflow.com/questions/66869902
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