藍色部分是我的文本框，紅色部分是我的相關面板。相關面板放置在列表視圖中<ListView RelativePanel.Below="Line" Name="SubTasksListView" Margin="10,10,10,0" HorizontalAlignment="Stretch" HorizontalContentAlignment="Stretch" ItemsSource="{x:Bind subtasks}" IsItemClickEnabled="True" ItemClick="ItemClick" ItemTemplate="{StaticResource SubTaskDataTemplate}"/> <DataTemplate x:DataType="data:ZTask" x:Key="SubTaskDataTemplate"> <RelativePanel Margin="10,10,20,10" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Background="Red" > <TextBox Background="Aqua" BorderThickness="0,0,0,0" BorderBrush="#8888" HorizontalContentAlignment="Stretch" KeyDown="Box_KeyDown" RelativePanel.AlignLeftWithPanel="True" Name="SubTaskTitle" PlaceholderText="+ Subtask" FontSize="16" Margin="0"/> <Line Name="Line" Stretch="Fill" Margin="10 0 0 0" Stroke="#8888" X2="1" Opacity="0.2" RelativePanel.Below="SubTaskTitle"/></RelativePanel></DataTemplate>我嘗試過 HorizontalAlignment="Stretch" 和 HorizontalContentAlignment="Stretch" 但它不起作用。請幫我解決這個問題
TextBox 在 UWP 中不會水平拉伸
慕桂英4014372
2023-09-16 16:00:50
