Xamarin - 如何在用户控件上调用click事件？

Question

我正在使用具有android和IOS项目的xamarin.forms PCL

我创建了一个usercontrol（stacklayout中的两个标签）

我想为usercontrol创建click事件。

以下是代码：

.xaml代码

  <local:DashboardBox Grid.Row="2" Grid.Column="0" SLBGColor ="#2E74B5"  BoxTitle="&#x0a; + &#x0a; Income">
  <local:DashboardBox.GestureRecognizers>
    <TapGestureRecognizer
            Tapped="onInComeTapped"/>
  </local:DashboardBox.GestureRecognizers>
</local:DashboardBox>

.cs代码

    async void onInComeTapped(object sender, EventArgs args)
    {
        await Navigation.PushModalAsync(new Income());
    }

UserControl代码：

 <?xml version="1.0" encoding="utf-8" ?>
 <StackLayout xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="BudgetManager.Control.DashboardBox">
<StackLayout x:Name="SL"  WidthRequest="150" HeightRequest="150" Padding="0,10,0,10">
<Grid VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto"></RowDefinition>
    <RowDefinition Height="*"></RowDefinition>
  </Grid.RowDefinitions>

  <Label x:Name="lblTitle" Grid.Row="0" TextColor="White" FontSize="20"  HorizontalTextAlignment="Center"></Label>
  <Label x:Name="lblValue"  VerticalOptions="EndAndExpand" Grid.Row="1"  TextColor="White" FontSize="20"  HorizontalTextAlignment="Center"> </Label>


</Grid>
</StackLayout>

</StackLayout>

当我点击usercontrol事件时，“onIncomeTapped”没有调用

请建议我如何在usercontrol上调用click事件。