xamarin UWP自定义圆角按钮

    uwp自带的button本身不支持圆角属性，所以要通过自定义控件实现。

    通过设置Button的Background=“{x:Null}”设置为Null使背景为空，再设置Button.Content中的内容，采用如下代码方式：

   前端代码：

 1 <UserControl
 2     x:Class="Test.UWP.ExtendControls.UWPButton"
 3     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 4     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 5     xmlns:local="using:Mixin.UWP.ExtendControls"
 6     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 7     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 8     mc:Ignorable="d">
 9     <Grid Background="{x:Null}">
10         <Grid Grid.Row="0">
11             <StackPanel Name="stack_Panel">
12                 <Button Click="btnDailog_Click" Background="{x:Null}" HorizontalAlignment="Stretch" Style="{StaticResource UWPDialogBtnStyle}">
13                     <Button.Content>
14                         <Grid >
15                             <Grid Grid.Row="0" >
16                                 <Rectangle Fill="White" RadiusX="6" RadiusY="6"></Rectangle>
17                                 <StackPanel HorizontalAlignment="Center" Margin="8,4,8,4">
18                                     <TextBlock x:Name="btnText" >我是自定义按钮</TextBlock>
19                                 </StackPanel>
20                             </Grid>
21                         </Grid>
22                     </Button.Content>
23                 </Button>
24                 
25             </StackPanel>
26             
27         </Grid>
28     </Grid>
29     
30 </UserControl>

UWPButton.xaml