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ViewModel.cs
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ViewModel.cs
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using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using System.Collections.ObjectModel;
namespace MauiApp1
{
public partial class ViewModel : ObservableObject
{
public ViewModel()
{
// Set up the items
Items = new ObservableCollection<string> { "one", "two", "three", "four", "five" };
// Here we try to preselect as per https://learn.microsoft.com/en-us/dotnet/maui/user-interface/controls/collectionview/selection#multiple-preselection
SelectedItems = new ObservableCollection<object>()
{
Items[1], Items[3]
};
}
public ObservableCollection<string> Items { get; set; }
public ObservableCollection<object> SelectedItems
{
get => selectedItems;
set => SetProperty(ref selectedItems, value);
}
ObservableCollection<object> selectedItems;
[RelayCommand]
Task PreSelectUsingBinding()
{
SelectedItems = new ObservableCollection<object> { Items[1], Items[3] };
return Task.CompletedTask;
}
public void PreSelectFromOnAppearing()
{
SelectedItems.Clear();
SelectedItems.Add(Items[1]);
SelectedItems.Add(Items[3]);
}
}
}