Shrlalgo.RvKits/WpfApp/MainViewModel.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Windows.Markup;

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using WPFluent;
using WPFluent.Controls;
using WPFluent.Extensions;

namespace WpfApp;

partial class MainViewModel : ObservableValidator
{
    private ISnackbarService snackbarService;
    private ControlAppearance snackbarAppearance = ControlAppearance.Danger;
    private int snackbarTimeout = 5;

    [ObservableProperty]
    private SnackbarPresenter snackbarPresenter;

    [RelayCommand]
    private void ButtonClick()
    {
        snackbarService = new SnackbarService();
        snackbarService.SetSnackbarPresenter(SnackbarPresenter);
        snackbarService.Show(
            "消息",
            "Test",
            snackbarAppearance,
            new SymbolIcon(SymbolRegular.Fluent24),
            TimeSpan.FromSeconds(snackbarTimeout)
        );
        //Toast.Information("I am information message");
        //Toast.Error("I am error message");
        //Toast.Success("I am success message");
        //Toast.Warning("I am warning message");
        //Toast.Show(owner: null!, "I am any message", new ToastConfig());
    }

    [RelayCommand]
    private void Loaded(object obj)
    {
        if (obj is SnackbarPresenter snackbarPresenter)
        {
            this.SnackbarPresenter = snackbarPresenter;
        }
    }

    private ObservableCollection<string> animals =
    [
        "Cat",
        "Dog",
        "Bear",
        "Lion",
        "Mouse",
        "Horse",
        "Rat",
        "Elephant",
        "Kangaroo",
        "Lizard",
        "Snake",
        "Frog",
        "Fish",
        "Butterfly",
        "Human",
        "Cow",
        "Bumble Bee"
    ];

    public ObservableCollection<Grade> Grades { get; set; } = [];

    public ObservableCollection<Grade> SelectedItems { get; set; } = [];

    public void GenerateTreeViewItem()
    {
        Grade item = new() { GradeLevel = "Grade1" };
        item.Students.Add(new() { Name = "St1" });
        item.Students.Add(new() { Name = "St2" });
        item.Students.Add(new() { Name = "St3" });
        Grade item1 = new() { GradeLevel = "Grade2" };
        item1.Students.Add(new() { Name = "StA" });
        item1.Students.Add(new() { Name = "StB" });
        Grades.Add(item);
        Grades.Add(item1);
    }
    [ObservableProperty]
    [NotifyDataErrorInfo]
    [MinLength(1)]
    [Range(10, 1000, ErrorMessage = "请输入大于10，小于1000的值")]
    [Required(ErrorMessage = "必填")]
    private string number;

    public ObservableCollection<string> Animals
    {
        get { return animals; }
    }

    public MainViewModel()
    {
        GenerateTreeViewItem();
    }

    public List<MultiTreeViewItem> Items = [];

    private string _selectedAnimal = "Cat";
    public string SelectedAnimal
    {
        get { return _selectedAnimal; }
        set
        {
            _selectedAnimal = value;
            OnPropertyChanged("SelectedAnimal");
        }
    }

    private ObservableCollection<string> _selectedAnimals;
    public ObservableCollection<string> SelectedAnimals
    {
        get
        {
            if (_selectedAnimals == null)
            {
                _selectedAnimals = ["Dog", "Lion", "Lizard"];
                SelectedAnimalsText = WriteSelectedAnimalsString(_selectedAnimals);
                _selectedAnimals.CollectionChanged += (s, e) =>
                {
                    SelectedAnimalsText = WriteSelectedAnimalsString(_selectedAnimals);
                    OnPropertyChanged("SelectedAnimals");
                };
            }
            return _selectedAnimals;
        }
        set { _selectedAnimals = value; }
    }

    public string SelectedAnimalsText
    {
        get { return _selectedAnimalsText; }
        set
        {
            _selectedAnimalsText = value;
            OnPropertyChanged("SelectedAnimalsText");
        }
    }
    string _selectedAnimalsText;

    private static string WriteSelectedAnimalsString(IList<string> list)
    {
        if (list.Count == 0)
            return string.Empty;

        var builder = new StringBuilder(list[0]);

        for (var i = 1; i < list.Count; i++)
        {
            builder.Append(", ");
            builder.Append(list[i]);
        }

        return builder.ToString();
    }

    [RelayCommand()]
    private void ShowDialog()
    {
        MessageExtensions.ShowMessage();
    }
}

class Grade
{
    public string GradeLevel { get; set; }

    public List<Student> Students { get; set; } = [];
}


class Student
{
    public int ID { get; set; }
    public string Name { get; set; }
    public string Class { get; set; }
}
//class CustomerValidator : AbstractValidator<Student>
//{
//    public CustomerValidator()
//    {
//        RuleFor(x => x.ID).NotEmpty();
//        RuleFor(x => x.Name).NotEmpty().WithMessage("请指定姓名");
//        RuleFor(x => x.Class).NotEmpty();
//    }
//}