MVP Sample for Winform

[leechw9]

MVP Sample for Winform

이철우

MVC 에서 개선한 것.

• C# Winform의 DataBinding 과 INotifyPropertyChanged 를 이용하여
• Model 과 View 에서
• DataChangedEvent 를 뺐다.

0. 먼저 Winform 프로젝트(.Net 7)를 만든다.
   0-1. 프로젝트 속성에서 'Console Application’을 선택한다.
   0-2. Form1 디자인에서 TextBoxData, ButtonReset, ButtonIncrease 를 추가한다.

1. IView.cs

    public interface IView
    {
        TextBox TextBoxData { get; }

        event EventHandler<EventArgs>? ResetPressed;
        event EventHandler<EventArgs>? IncreasePressed;
    }

2. Model.cs

    public class Model : INotifyPropertyChanged
    {
        public Model() { }
        public int Data
        {
            get => _data;
            set
            {
                if (_data != value)
                {
                    _data = value;
                    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Data)));
                    Console.WriteLine(ToString());
                }
            }
        }
        private int _data = 0;

        public void Reset() => Data = 0;
        public void Increase() => Data++;
        public void Set(int data) => Data = data;

        public override string ToString() => $"Data:{Data}";

        public event PropertyChangedEventHandler? PropertyChanged;
    }

3. Presenter.cs

    public class Presenter
    {
        public Model Model { get; private set; }
        public IView View { get; private set; }

        public Presenter(Model model, IView view)
        {
            Model = model;
            View = view;

            View.ResetPressed += View_ResetPressed;
            View.IncreasePressed += View_IncreasePressed;

            var binding = new BindingSource
            {
                DataSource = Model
            };
            View.TextBoxData.DataBindings.Add(new Binding("Text", binding, "Data", true, DataSourceUpdateMode.OnPropertyChanged));
        }

        private void View_ResetPressed(object? sender, EventArgs e)
        {
            Model.Reset();
        }
        private void View_IncreasePressed(object? sender, EventArgs e)
        {
            Model.Increase();
        }
    }

4. IView 상속받은 Form1.cs

    public partial class Form1 : Form, IView
    {
        public Form1()
        {
            InitializeComponent();
        }

        TextBox IView.TextBoxData => TextBoxData;

        public event EventHandler<EventArgs>? ResetPressed;
        public event EventHandler<EventArgs>? IncreasePressed;

        private void ButtonReset_Click(object sender, EventArgs e)
        {
            ResetPressed?.Invoke(this, new EventArgs());
        }

        private void ButtonIncrease_Click(object sender, EventArgs e)
        {
            IncreasePressed?.Invoke(this, new EventArgs());
        }
    }

5. Program.cs

    internal static class Program
    {
        /// <summary>
        ///  The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // To customize application configuration such as set high DPI settings or default font,
            // see https://aka.ms/applicationconfiguration.
            ApplicationConfiguration.Initialize();

            #region MVP Sample for Winform.
            var view = new Form1();
            var model = new Model();
            _ = new Presenter(model, view);
            #endregion

            Application.Run(view);
        }
    }