Shaker/Avalonia/ShakerApp/ViewModels/File/LoadConfigViewModel.cs

using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Platform.Storage;
using CommunityToolkit.Mvvm.Input;
using Shaker.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace ShakerApp.ViewModels
{
    internal class LoadConfigViewModel:DisplayViewModelBase<IModel>
    {
        public override string OKContent => "Confirm";
        public override bool CanResize => false;
        public override double Height => 320;
        public override double Width => 620;
        private string selectedFile = string.Empty;

        private LoadConfigViewModel()
        {
            Content = typeof(Views.LoadConfigView);
        }
        static LoadConfigViewModel()
        {

        }
        public string SelectedFile { get => selectedFile; set =>SetProperty(ref selectedFile , value); }
        public override void InitData()
        {
            base.InitData();
            SelectedFile = string.Empty;
        }
        protected override void Save()
        {
            base.Save();
        }

        public ICommand SelectFileCommand => new RelayCommand<string?>(SelectFile);
        private async void SelectFile(string? p)
        {
            if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
            {
                var folder = await TopLevel.GetTopLevel(desktop.MainWindow)!.StorageProvider.OpenFilePickerAsync(new Avalonia.Platform.Storage.FilePickerOpenOptions()
                {
                    AllowMultiple = false,
                    Title = p == null ? "" : App.Current?.FindResource(p) + "",
                    FileTypeFilter = new FilePickerFileType[]
                    {
                        new FilePickerFileType($"{(p ==null ?"": App.Current?.FindResource(p) + "")}"){ Patterns = new []{"*.cfg" } }
                    }
                });
                if (folder != null && folder.Count>0)
                {
                    SelectedFile = folder.First().Path.LocalPath;
                }
            }
        }
        public static LoadConfigViewModel Instance { get; } = new LoadConfigViewModel();
    }
}