Windows Store universal app - ListView oddity

问题

I am developing an universal app and using a ListView to display more than 50000 entries. I am using the following method to load the data:

1. In the assets folder there's a simple utf-8 txt file with all the items (headwords of a dictionary in alphabetical order just to be precise).

2. I load the file into an IList with ReadLinesAsync:

   IList<string> lista1 = await FileIO.ReadLinesAsync(listafile1);
   

3. Finally I set the ItemsSource of the ListView to this IList:

   listView1.ItemsSource = lista1;
   

It seems to be fast and work fine but at the end of the list the items are disappearing after scrolling. I experience this on phones and pc and even in the emulator too. I made a video of it to be more clear.

I already created the same app for android and ios and didn't experience this type of error.

I would appreciate any help

István

回答1:

The solution is to add a VirtualizingStackPanel to ListView in xaml:

        <ListView>
            <ListView.ItemsPanel>
                <ItemsPanelTemplate>
                    <VirtualizingStackPanel/>
                </ItemsPanelTemplate>
            </ListView.ItemsPanel>
        </ListView>

来源：https://stackoverflow.com/questions/25039561/windows-store-universal-app-listview-oddity