如何从 xamarin forms 中的列表视图中获取所选项目索引？

Question

Here i want to display the selected item index in Xamarin Forms listview in below code iam getting InvalidCastException in e.SelectedItemIndex.

 private async void animelist_ItemSelected(object sender, SelectedItemChangedEventArgs e)
        {
            var si = (Applications)animelist.SelectedItem;
            string i = Convert.ToString(e.SelectedItemIndex);
            await DisplayAlert("Info",i,"Ok");
        }

Answer 1

Here's is a code snippet that works for me and I believe should work for you.

 //change Core.Models.Data.TaskItem to the object you want to cast to.
 var SelectedItem = (Core.Models.Data.TaskItem)e.SelectedItem;

 await DisplayAlert("Info", $"{SelectedItem.Description}}", "Ok");
 //where SelectedItem.Description is a field in my model

The reason you got an invalid cast exception is that animelist.SelectedItem is of type ListView.SelectedItem and you're trying to cast it Application type. Using e.SelectedItem as shown in the sample will take on the generic type of your listView binding model.

Let me know if this helps.