using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DevExpress.GridDemo { public partial class ColumnChooserPage { public ColumnChooserPage() { InitializeComponent(); BindData(); } void OnShowColumnChooser(object sender, EventArgs e) { grid.ShowColumnChooser(); } async void BindData() { BindingContext = await LoadData(); grid.ShowColumnChooser(); } Task<MainPageViewModel> LoadData() { return Task<MainPageViewModel>.Run(() => new MainPageViewModel(new DemoOrdersRepository())); } } }