modernkeepass/ModernKeePass/Views/MainPageFrames/OpenDatabasePage.xaml.cs

using System;
using Windows.Storage.AccessCache;
using Windows.Storage.Pickers;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Navigation;
using ModernKeePass.Domain.Dtos;
using ModernKeePass.ViewModels;

// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238

namespace ModernKeePass.Views
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class OpenDatabasePage
    {
        public OpenVm Model => (OpenVm)DataContext;

        public OpenDatabasePage()
        {
            InitializeComponent();
        }

        protected override async void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);
            var file = e.Parameter as FileInfo;
            if (file != null)
            {
                await Model.OpenFile(file);
            }
        }

        private async void ButtonBase_OnClick(object sender, RoutedEventArgs e)
        {
            var picker = new FileOpenPicker
            {
                ViewMode = PickerViewMode.List,
                SuggestedStartLocation = PickerLocationId.DocumentsLibrary
            };
            picker.FileTypeFilter.Add(".kdbx");
            
            // Application now has read/write access to the picked file
            var file = await picker.PickSingleFileAsync().AsTask();
            if (file == null) return;


            var token = StorageApplicationPermissions.FutureAccessList.Add(file);
            var fileInfo = new FileInfo
            {
                Path = file.Path,
                Name = file.DisplayName,
                Id = token
            };
            await Model.OpenFile(fileInfo);
        }
    }
}