README.md

How to show or hide AccordionItem in Xamarin.Forms (SfAccordion)

You can show or hide the AccoridonItem in Xamarin.Forms SfAccordion by handling the ViewModel bound collection with add or remove action.

You can also refer the following article.

https://www.syncfusion.com/kb/11383/how-to-show-or-hide-accordionitem-in-xamarin-forms-sfaccordion

C#

OnHideOrShow handler is used to show or hide the particular AccordionItem by updating the collection.

public class BehaviorClass : Behavior<ContentPage>
{
    Contact deletedItem = null;
    SfAccordion accordion;
    Button HideOrShow;
    protected override void OnAttachedTo(ContentPage bindable)
    {
        base.OnAttachedTo(bindable);
        accordion = bindable.FindByName<SfAccordion>("Accordion");
        HideOrShow = bindable.FindByName<Button>("HideOrShow");
        HideOrShow.Clicked += OnHideOrShow;
    }
    private void OnHideOrShow(object sender, EventArgs e)
    {
        var items = (sender as Button).BindingContext as ViewModel;
 
        if (deletedItem == null)
        {
            deletedItem = items.ContactsInfo[2];
            items.ContactsInfo.RemoveAt(2);
        }
        else
        {
            items.ContactsInfo.Insert(2, deletedItem);
            deletedItem = null;
        }
    }
}

Outut