Scrollviewer 滚动条未显示且需要显示

Question

为什么下面的XAML没有出现滚动条？

<Window x:Class="GridViewsToImagePocApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlna:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Title="MainWindow" Height="600" Width=800">
    <StackPanel>
        <ScrollViewer IsEnabled="True" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible">
            <StackPanel>
                <telerik:RadGridView x:Name="GridView1" AutoGenerateColumns="True" />
                <telerik:RadGridView x:Name="GridView2" AutoGenerateColumns="True" Margin="0 15 0 0" />
                <telerik:RadGridView x:Name="GridView3" AutoGenerateColumns="True" Margin="0 15 0 0" />
                <telerik:RadGridView x:Name="GridView4" AutoGenerateColumns="True" Margin="0 15 0 0" />
                <telerik:RadGridView x:Name="GridView5" AutoGenerateColumns="True" Margin="0 15 0 0" />
            </StackPanel>
        </ScrollViewer>
    </StackPanel>
</Window>

Answer 1

外层 StackPanel 是问题所在。它以正无穷大（Vertical Orientation 方向的高度或 Horizontal 方向的宽度测量其子项。因此 ScrollViewer 不受任何限制，因此它会扩展以适应其内容并且不需要显示任何滚动条。

根据您的要求使用 panel that restricts the size of the ScrollViewer to the available space instead, like Grid, UniformGrid or DockPanel。

<Grid>
   <ScrollViewer CanContentScroll="True" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible">
      <StackPanel>
         <!-- ...your content. -->
      </StackPanel>
   </ScrollViewer>
</Grid>

Scrollviewer 滚动条未显示且需要显示

Scrollviewer scrollbars not showing and needs to

c#

wpf

xaml

scrollviewer