WPF气泡样式弹窗效果代码分享

页面设计需求，做了一个气泡形状的弹出框，效果如下：

设计思路如下：

1. 使用Path绘制气泡的尖尖，将这个放到顶层；

2. 在用border绘制长方形框，将这个放到底层，并且设置Margin值，使得Path图层和border看起来衔接在一起。 

代码如下：

<Window x:Class="BubblePanelTest.MainWindow"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 Title="MainWindow" Height="350" Width="525">
 <Window.Resources>
 <Style TargetType="Label" x:Key="TopBubblePanel">
 <Setter Property="Template">
 <Setter.Value>
 <ControlTemplate TargetType="{x:Type Label}">
 <Grid>
 <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Top" Background="Yellow" HorizontalAlignment="Left" Margin="0,8.5,0,0" Padding="5">
 <ContentPresenter />
 </Border>
 <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10,0,0,0" Background="Transparent">
 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
 <Path.Data>
 <PathGeometry Figures="M 0,10
 L 0,10,5,0
 L 5,0,10,10
 "/>
 </Path.Data>
 </Path>
 </Canvas>
 </Grid>
 </ControlTemplate>
 </Setter.Value>
 </Setter>
 </Style>
 <Style TargetType="Label" x:Key="BottomBubblePanel">
 <Setter Property="Template">
 <Setter.Value>
 <ControlTemplate TargetType="{x:Type Label}">
 <Grid>
 <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Bottom" Margin="0,0,0,8.5" Background="Yellow" HorizontalAlignment="Left" Padding="5">
 <ContentPresenter />
 </Border>
 <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="10,0,0,0" Background="Transparent">
 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
 <Path.Data>
 <PathGeometry Figures="M 0,0
 L 0,0,5,10
 L 5,10,10,0
 "/>
 </Path.Data>
 </Path>
 </Canvas>
 </Grid>
 </ControlTemplate>
 </Setter.Value>
 </Setter>
 </Style>
 <Style TargetType="Label" x:Key="LeftBubblePanel">
 <Setter Property="Template">
 <Setter.Value>
 <ControlTemplate TargetType="{x:Type Label}">
 <Grid>
 <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" VerticalAlignment="Top" Margin="8.5,0,0,0" Background="Yellow" HorizontalAlignment="Left" Padding="5">
 <ContentPresenter />
 </Border>
 <Canvas Width="10" Height="10" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,10,0,0" Background="Transparent">
 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
 <Path.Data>
 <PathGeometry Figures="M 10,0
 L 10,0,0,5
 L 0,5,10,10
 "/>
 </Path.Data>
 </Path>
 </Canvas>
 </Grid>
 </ControlTemplate>
 </Setter.Value>
 </Setter>
 </Style>
 <Style TargetType="Label" x:Key="RightBubblePanel">
 <Setter Property="Template">
 <Setter.Value>
 <ControlTemplate TargetType="{x:Type Label}">
 <Grid HorizontalAlignment="Left">
 <Border CornerRadius="4" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,0,8.5,0" Background="Yellow" Padding="5">
 <ContentPresenter />
 </Border>
 <Canvas Width="10" Height="10" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,10,0,0" Background="Transparent">
 <Path Stroke="Black" StrokeThickness="0.5" Fill="Yellow">
 <Path.Data>
 <PathGeometry Figures="M 0,0
 L 0,0,10,5
 L 10,5,0,10
 "/>
 </Path.Data>
 </Path>
 </Canvas>
 </Grid>
 </ControlTemplate>
 </Setter.Value>
 </Setter>
 </Style>
 </Window.Resources>
 <StackPanel>
 <Label Style="{StaticResource TopBubblePanel}" Tag="Top" Margin="2">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80"/>
 </StackPanel>
 </StackPanel>
 </Label>
 <Label Style="{StaticResource BottomBubblePanel}" Tag="Top" Margin="2">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80"/>
 </StackPanel>
 </StackPanel>
 </Label>
 <Label Style="{StaticResource LeftBubblePanel}" Tag="Top" Margin="2">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80"/>
 </StackPanel>
 </StackPanel>
 </Label>
 <Label Style="{StaticResource RightBubblePanel}" Tag="Top" Margin="2">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80"/>
 </StackPanel>
 </StackPanel>
 </Label>
 <StackPanel Orientation="Horizontal" Margin="0,30,0,0">
 <Button Name="btnTestPopup1" Width="100" Height="30" Content="Bottom" Click="btnTestPopup1_Click" />
 <Button Name="btnTestPopup2" Width="100" Height="30" Content="Top" Click="btnTestPopup2_Click" />
 <Button Name="btnTestPopup3" Width="100" Height="30" Content="Right" Click="btnTestPopup3_Click" />
 <Button Name="btnTestPopup4" Width="100" Height="30" Content="Left" Click="btnTestPopup4_Click" />
 </StackPanel>
 <Popup Name="pop1" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Slide" PlacementTarget="{Binding ElementName=btnTestPopup1}" Placement="Bottom" >
 <Label Style="{StaticResource TopBubblePanel}" Tag="Top">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80" Name="txtTest1" />
 </StackPanel>
 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
 <Button Content="确定" Click="btnOK1_Click" Width="50" Height="25" Margin="5" />
 <Button Content="取消" Click="btnCancel1_Click" Width="50" Height="25" Margin="5"/>
 </StackPanel>
 </StackPanel>
 </Label>
 </Popup>
 <Popup Name="pop2" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Fade" PlacementTarget="{Binding ElementName=btnTestPopup2}" Placement="Top" >
 <Label Style="{StaticResource BottomBubblePanel}" Tag="Top">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80" Name="txtTest2" />
 </StackPanel>
 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
 <Button Content="确定" Click="btnOK2_Click" Width="50" Height="25" Margin="5"/>
 <Button Content="取消" Click="btnCancel2_Click" Width="50" Height="25" Margin="5"/>
 </StackPanel>
 </StackPanel>
 </Label>
 </Popup>
 <Popup Name="pop3" AllowsTransparency="True" StaysOpen="False" PopupAnimation="Scroll" PlacementTarget="{Binding ElementName=btnTestPopup3}" Placement="Right" >
 <Label Style="{StaticResource LeftBubblePanel}" Tag="Top">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80" Name="txtTest3" />
 </StackPanel>
 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
 <Button Content="确定" Click="btnOK2_Click" Width="50" Height="25" Margin="5"/>
 <Button Content="取消" Click="btnCancel3_Click" Width="50" Height="25" Margin="5"/>
 </StackPanel>
 </StackPanel>
 </Label>
 </Popup>
 <Popup Name="pop4" AllowsTransparency="True" StaysOpen="False" PopupAnimation="None" PlacementTarget="{Binding ElementName=btnTestPopup4}" Placement="Left" >
 <Label Style="{StaticResource RightBubblePanel}" Tag="Top">
 <StackPanel>
 <StackPanel Orientation="Horizontal">
 <TextBlock Text="abc" />
 <TextBox Width="80" Name="txtTest4" />
 </StackPanel>
 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
 <Button Content="确定" Click="btnOK4_Click" Width="50" Height="25" Margin="5"/>
 <Button Content="取消" Click="btnCancel4_Click" Width="50" Height="25" Margin="5"/>
 </StackPanel>
 </StackPanel>
 </Label>
 </Popup>
 </StackPanel>
</Window>

后台代码，很简单，就是控制pupup显示或隐藏

private void btnTestPopup1_Click(object sender, RoutedEventArgs e)
 {
 pop1.IsOpen = true;
 }
 private void btnOK1_Click(object sender, RoutedEventArgs e)
 {
 pop1.IsOpen = false;
 }
 private void btnCancel1_Click(object sender, RoutedEventArgs e)
 {
 pop1.IsOpen = false;
 }

 private void btnTestPopup2_Click(object sender, RoutedEventArgs e)
 {
 pop2.IsOpen = true;
 }
 private void btnOK2_Click(object sender, RoutedEventArgs e)
 {
 pop2.IsOpen = false;
 }
 private void btnCancel2_Click(object sender, RoutedEventArgs e)
 {
 pop2.IsOpen = false;
 }

 private void btnTestPopup3_Click(object sender, RoutedEventArgs e)
 {
 pop3.IsOpen = true;
 }
 private void btnOK3_Click(object sender, RoutedEventArgs e)
 {
 pop3.IsOpen = false;
 }
 private void btnCancel3_Click(object sender, RoutedEventArgs e)
 {
 pop3.IsOpen = false;
 }

 private void btnTestPopup4_Click(object sender, RoutedEventArgs e)
 {
 pop4.IsOpen = true;
 }
 private void btnOK4_Click(object sender, RoutedEventArgs e)
 {
 pop4.IsOpen = false;
 }
 private void btnCancel4_Click(object sender, RoutedEventArgs e)
 {
 pop4.IsOpen = false;
 }