我怎样才能从用户控件（视图）中删除逻辑到演示者

Question

这是我第一次尝试让 MVP 与 WinForms 一起工作。我确实有一个更大的项目。但是，在这里我对 WinForms MVP 示例进行了非常简单的尝试。我只有一个模型、一个表单和两个视图。 Presenter 已连接 Program.cs。一切正常。但是，对于一个特定的用户控件，我似乎无法将其余业务逻辑重构到 Presenter 中。我正在尝试制作一个易于修改为演示项目的示例。我真的不是在寻找简单地让它工作，而是在寻找“经典”答案，如果有的话。您可以向世界提供的任何帮助或建议，我们将不胜感激。即使朝着正确的方向推动也会有很大的帮助。

我的 MainFormPresenter：

internal class MainFormPresenter
{
    private readonly SimpleContext _context = new SimpleContext();
    private readonly IMainFormView _mainFormView;
    private readonly IPeopleListView _peopleListView;
    private readonly IPersonInfoView _personInfoView;

    public MainFormPresenter(IMainFormView mainFormView)
    {
        _peopleListView = mainFormView.PeopleListView;
        _personInfoView = mainFormView.PersonInfoView;

        _mainFormView = mainFormView;
        mainFormView.Load += MainFormViewOnLoad;
        mainFormView.FormClosed += MainFormViewOnFormClosed;

        _peopleListView.SelectionChanged += OnSelectedNameChanged;
    }

    private void OnSelectedNameChanged(object sender, EventArgs e)
    {
        int id = _peopleListView.GetSelectedId();
        Person person = _context.People.Find(id);

        _personInfoView.SetFirstName(person.FirstName);
        _personInfoView.SetLastName(person.LastName);
        _personInfoView.SetBirthDate(person.BirthDate);
    }

    private void MainFormViewOnFormClosed(object sender, FormClosedEventArgs e)
    {
        _context.Dispose();
    }

    private void MainFormViewOnLoad(object sender, EventArgs e)
    {
        _context.People.Load();

        BindingList<Person> people = _context.People.Local.ToBindingList();

        _peopleListView.SetDataSource(people);
    }
}

我的 PeopleListView 代码隐藏：

public partial class PeopleListView : UserControl, IPeopleListView
{
    private readonly BindingSource _bSource;

    public PeopleListView()
    {
        _bSource = new BindingSource();
        InitializeComponent();
    }

    public int GetSelectedId()
    {
        DataGridViewRow row = PeopleGridView.CurrentRow;

        if (row != null)
        {
            Person person = (Person)row.DataBoundItem;
            return person.PersonId;
        }

        return 0;
    }

    public void SetDataSource(BindingList<Person> people)
    {
        _bSource.DataSource = people;
        _bSource.RaiseListChangedEvents = true;

        PeopleGridView.AutoGenerateColumns = false;
        PeopleGridView.DataSource = _bSource;
    }

    private void PeopleGridView_SelectionChanged(object sender, EventArgs e)
    {
        SelectionChanged?.Invoke(new object(), new EventArgs());
    }

    public event EventHandler SelectionChanged;
}

现在如何将此逻辑提取回 Presenter？ MVP 模式（根据 Pluralsight 的 - Windows Forms Best Practices）声明视图不应该关心它显示的数据。例如关注点分离。但是我希望我的视图在模型更改时更新。

Answer 1

它可能不是正典，但我是这样处理的。建设性的批评仍然非常受欢迎。平淡的 ol' 只是称我为粗心的白痴或告诉我我做了什么或没有做正确的事情也是找到的。

我修改的演示者：

internal class MainFormPresenter
{
    private readonly SimpleContext _context = new SimpleContext();
    private readonly IMainFormView _mainFormView;
    private readonly IPeopleListView _peopleListView;
    private readonly IPersonInfoView _personInfoView;

    public MainFormPresenter(IMainFormView mainFormView)
    {
        _peopleListView = mainFormView.PeopleListView;
        _personInfoView = mainFormView.PersonInfoView;

        _mainFormView = mainFormView;
        _mainFormView.Load += MainFormViewOnLoad;
        _mainFormView.FormClosed += MainFormViewOnFormClosed;

        _peopleListView.SelectionChanged += OnSelectedNameChanged;
    }

    private void OnSelectedNameChanged(object sender, EventArgs e)
    {
        DataGridViewRow row = _peopleListView.GetSelectedRow();
        Person person = (Person) row.DataBoundItem;

        _personInfoView.SetFirstName(person.FirstName);
        _personInfoView.SetLastName(person.LastName);
        _personInfoView.SetBirthDate(person.BirthDate);
    }

    private void MainFormViewOnFormClosed(object sender, FormClosedEventArgs e)
    {
        _context.Dispose();
    }

    private void MainFormViewOnLoad(object sender, EventArgs e)
    {
        _context.People.Load();

        BindingList<Person> people = _context.People.Local.ToBindingList();

        BindingSource bSource = new BindingSource
        {
            DataSource = people,
            RaiseListChangedEvents = true
        };

        _peopleListView.SetDataSource(bSource);
    }
}

我修改的用户控件（视图）：

public partial class PeopleListView : UserControl, IPeopleListView
{
    public PeopleListView()
    {
        InitializeComponent();
    }

    public DataGridViewRow GetSelectedRow()
    {
        return PeopleGridView.CurrentRow;
    }

    public void SetDataSource(BindingSource bSource)
    {
        PeopleGridView.AutoGenerateColumns = false;
        PeopleGridView.DataSource = bSource;
    }

    private void PeopleGridView_SelectionChanged(object sender, EventArgs e)
    {
        SelectionChanged?.Invoke(new object(), new EventArgs());
    }

    public event EventHandler SelectionChanged;
}

我怎样才能从用户控件（视图）中删除逻辑到演示者

How can I strip out logic from a UserControl (View) to the Presenter

c#

mvp

winforms