问Xamarin表单:如何在ListView中处理大数据？

EN

using System.Collections.ObjectModel;

namespace Brunie.Mobile.ViewModels {
    public class VmListCompany {
        public ObservableCollection<Company> AllCompanies {
            get;
        } = new ObservableCollection<Company>();
        public VmListCompany() {
            LoadAllCompanies();
        }
        private void LoadAllCompanies() {
            Company company = null;
            while(null != (company = GetNextCompany(company))) {
                AllCompanies.Add(company);
            }
        }
        private bool HasNextCompany(Company company) {
            bool hasNextCompany = false;
            ......
            return (hasNextCompany);
        }
        private Company GetNextCompany(Company company) {
            if(!HasNextCompany(company)) {
                return (null);
            }
            Company nextCompany = new Company();
            ......
            return (nextCompany);
        }
    }
    public class Company {
        public string Name {
            get;
            set;
        }
        public string Address {
            get;
            set;
        }
        public int NumberOfEmployees {
            get;
            set;
        }
    }
}

<ListView ItemsSource="{Binding AllCompanies}">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <Label Text="{Binding Name}" />
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>