Xamarin.Forms: Get all cells/items of a listview

Question

I want to make some changes to all of the cells shown in the ListView. Therefore I want to get all cells or items. E.g.

this.listView.ItemSource.Items
         


        

Answer 1

I am probably late to the party, but here's another approach using System.Reflection. Anyways, I'd suggest using it only in cases where databinding isn't possible and as a last resort option.

For a given ListView

You can crawl through the ListView by grabbing the "TemplatedItems" property, casting it to ITemplatedItemsList and iterating through your (View)cells.

IEnumerable pInfos = (connectionsListView as ItemsView).GetType().GetRuntimeProperties();
var templatedItems = pInfos.FirstOrDefault(info => info.Name == "TemplatedItems");
if (templatedItems != null)
{
  var cells = templatedItems.GetValue(connectionsListView);
    foreach (ViewCell cell in cells as Xamarin.Forms.ITemplatedItemsList)
    {
        if (cell.BindingContext != null && cell.BindingContext is MyModelClass)
        {
            MyViewClass target = (cell.View as Grid).Children.OfType().FirstOrDefault();
            if (target != null)
            {
               //do whatever you want to do with your item... 
            }
        }
    }
}

Update: Since it was asked, if (cell.BindingContext != null && cell.BindingContext is MyModelClass) is basically a safeguard to prevent access to non-existing views, for instance if the ListView hasn't been populated yet.

If a check for the BindingContext being a particular model class isn't necessary, it would be sufficient to reduce the line to

if (cell.BindingContext != null)