在CarrouselView中获取所点击元素的索引

Question

我正在学习Xamarin，我想在我的CarouselView中获取被轻击的元素的idex

这里是Xaml代码：

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
  x:Name="currentPage">

<StackLayout >

<CarouselView x:Name="TestList"  >
        <CarouselView.ItemTemplate >
            <DataTemplate>

        <StackLayout >


                <StackLayout Grid.Row="3"  VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">


                    <StackLayout.GestureRecognizers>
                        <TapGestureRecognizer Command="{Binding CarouselItemTapped,Source={x:Reference currentPage}}" CommandParameter="{Binding .}"/>
                    </StackLayout.GestureRecognizers>

                </StackLayout>


        </StackLayout>

            </DataTemplate>
        </CarouselView.ItemTemplate>
    </CarouselView>
</StackLayout>

这是我的C＃代码：

初始化：

 public ICommand CarouselItemTapped { get; set; }  // initialize my command
 new List<TestModel> ListWordsTest = new List<TestModel>(); // initialize my list of TestModel


      // the Model I use  get strings elements declared as Public {get; set;}
       TestModel testmodel = new TestModel 
            {
                Word1 = "word1",  // type string
                Word2 = "word2",  //type string

            };

获取点击的元素信息

   //When I tapped The carousel I get information like this
   CarouselItemTapped = new Xamarin.Forms.Command((selectItem) => {

         var mynews = selectItem //as IDoNotKnow  I would like to get the item index 
      });

Answer 1

Position属性将告诉您可见项目的索引，而CurrentItem是实际项目。

Answer 2

假设ListWordsTest是您的轮播视图的商品来源，然后我们可以通过以下方式获取索引：

CarouselItemTapped = new Xamarin.Forms.Command((selectItem) => 
{

    var mynews = selectItem; //as IDoNotKnow  I would like to get the item index 

    var index = ListWordsTest.IndexOf((TestModel)selectItem);
});