目前,我的堆栈面板具有自动宽度(问题可能就在这里),其中包含一些网格等项目。
This is你的问题。如果 StackPanel 的 Orientation 属性设置为 Horizontal,则其子级将具有无限的水平空间;如果其设置为 Vertical,则 StackPanel 的子级将具有无限的垂直空间。因此,您必须为 StackPanel 本身或 ScrollViewer 指定显式宽度才能正常工作。
或者,您可以将 ScrollViewer 放入测量其子项的面板中,例如 Grid(但不是 StackPanel)。这适用于例如:
<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication1"
mc:Ignorable="d"
Title="Window" Height="300" Width="300">
<Grid>
<ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Disabled" HorizontalAlignment="Left" Height="85" CanContentScroll="True">
<StackPanel x:Name="Film" Height="85" Width="Auto" Margin="0,0,0,0" Orientation="Horizontal" ScrollViewer.HorizontalScrollBarVisibility="Visible" CanHorizontallyScroll="True" ScrollViewer.VerticalScrollBarVisibility="Disabled" ScrollViewer.CanContentScroll="True" d:LayoutOverrides="TopPosition, BottomPosition">
<StackPanel.Background>
<SolidColorBrush Color="Yellow"/>
</StackPanel.Background>
<Grid Width="100" Background="Red"/>
<Grid Width="100" Background="#FFFF0051"/>
<Grid Width="100" Background="#FFB900FF"/>
<Grid Width="100" Background="#FF002EFF"/>
<Grid Width="100" Background="#FF00FFDC"/>
<Grid Width="100" Background="#FF51FF00"/>
<Grid Width="100" Background="Red"/>
</StackPanel>
</ScrollViewer>
</Grid>
</Window>
但这并不是因为 StackPanel 被认为具有无限宽度:
<StackPanel>
<ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Disabled" HorizontalAlignment="Left" Height="85" CanContentScroll="True">
<StackPanel x:Name="Film" Height="85" Width="Auto" Margin="0,0,0,0" Orientation="Horizontal" ScrollViewer.HorizontalScrollBarVisibility="Visible" CanHorizontallyScroll="True" ScrollViewer.VerticalScrollBarVisibility="Disabled" ScrollViewer.CanContentScroll="True" d:LayoutOverrides="TopPosition, BottomPosition">
<StackPanel.Background>
<SolidColorBrush Color="Yellow"/>
</StackPanel.Background>
<Grid Width="100" Background="Red"/>
<Grid Width="100" Background="#FFFF0051"/>
<Grid Width="100" Background="#FFB900FF"/>
<Grid Width="100" Background="#FF002EFF"/>
<Grid Width="100" Background="#FF00FFDC"/>
<Grid Width="100" Background="#FF51FF00"/>
<Grid Width="100" Background="Red"/>
</StackPanel>
</ScrollViewer>
</StackPanel>
将 ScrollViewer 放入 StackPanel 中是一个坏主意。