参考这个问题,我尝试在我的用户控件中使用网格线。在设计时,控件看起来很好,但当我尝试将组件插入到我的主窗口时,所有的网格线都消失了,而代之以丑陋的灰色角落:
<UserControl x:Class="mx_sachdaten.View.FormWorkspaceView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d" Loaded="FormWorkspaceView_Loaded"
d:DesignHeight="400" d:DesignWidth="400">
<UserControl.Resources>
<DrawingBrush x:Key="FormCanvasGridTile" Stretch="None" TileMode="Tile"
Viewport="0,0,30,30" ViewportUnits="Absolute">
<DrawingBrush.Drawing>
<GeometryDrawing>
<GeometryDrawing.Geometry>
<GeometryGroup>
<LineGeometry StartPoint="0,0" EndPoint="30,0" />
<LineGeometry StartPoint="30,0" EndPoint="30,30" />
<LineGeometry StartPoint="30,30" EndPoint="0,30" />
<LineGeometry StartPoint="0,30" EndPoint="0,0" />
</GeometryGroup>
</GeometryDrawing.Geometry>
<GeometryDrawing.Pen>
<Pen Thickness="1" Brush="LightGray" />
</GeometryDrawing.Pen>
<GeometryDrawing.Brush>White</GeometryDrawing.Brush>
</GeometryDrawing>
</DrawingBrush.Drawing>
</DrawingBrush>
</UserControl.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Canvas Grid.Column="0" x:Name="FormCanvas" Background="{StaticResource FormCanvasGridTile}"
MouseLeftButtonDown="FormCanvas_MouseLeftButtonDown" VerticalAlignment="Stretch"
HorizontalAlignment="Stretch" />
<ToolBarTray Grid.Column="1" Orientation="Vertical">
<ToolBar Band="1">
<Button Content="Label" HorizontalAlignment="Right" />
<Button Content="TextBox" HorizontalAlignment="Right" />
<Button Content="Button" HorizontalAlignment="Right" />
</ToolBar>
</ToolBarTray>
</Grid>
</UserControl>
这是结果: 用户控件预览
这是在我的主窗口中的效果: 主窗口
请问为什么当我把用户控件嵌入到我的窗口时,背景图案无法正常工作?