wpf tooltip 样式自定义

 <Style BasedOn="{StaticResource {x:Type ToolTip}}" TargetType="ToolTip">
 <Setter Property="Template">
 <Setter.Value>
 <ControlTemplate TargetType="{x:Type ToolTip}">
 <Border Width="128"
 Height="98"
 BorderBrush="#FFDEE7F6"
 BorderThickness="1"
 CornerRadius="5">
 <Border.Background>
 <SolidColorBrush Opacity="0.8" Color="White" />
 </Border.Background>
 <Grid Margin="10,15,0,15">
 <Grid.RowDefinitions>
 <RowDefinition />
 <RowDefinition />
 <RowDefinition />
 </Grid.RowDefinitions>
 <TextBlock VerticalAlignment="Center" Text="{Binding Tag.CityName}" />
 <TextBlock Grid.Row="1"
 VerticalAlignment="Center"
 Text="{Binding Tag.Total, StringFormat=总量：{0} 辆}" />
 <TextBlock Grid.Row="2"
 VerticalAlignment="Center"
 Text="{Binding Tag.TodayCount, StringFormat=今日：{0} 辆}" />
 </Grid>
 </Border>
 </ControlTemplate>
 </Setter.Value>
 </Setter>
 </Style>

<Path Name="HaiNan"
Stroke="#FF113FBB"
StrokeThickness="0.5"
Tag="xxxxx">
<Path.ToolTip>
<ToolTip DataContext="{Binding Path=PlacementTarget, RelativeSource={x:Static RelativeSource.Self}}" />
</Path.ToolTip>

</Path >

把需要传入tooltip内的值付到对象的tag对象内，然后tooltip绑定tag作为数据上下文