MVP查看知道型号 [英] Mvp View knows Model

问题描述

我试图用MVP和我注意到，我的观点必须知道模型，不应该发生在我的MVP presume。

I'm trying to use MVP and I notice that my View must know Model that should not happen in MVP I presume.

下面是例子：

public partial class TestForm : Form, ITestView
{
    public void LoadList(IEnumerable<AppSignature> data)
    {
        testPresenterBindingSource.DataSource = data;
    }
}

public interface ITestView
{
    event EventHandler<EventArgs> Load;
    void LoadList(IEnumerable<AppSignature> data);
}

public class TestPresenter
{
   private ITestView view;

   public TestPresenter(ITestView view)
   {  
       this.view = view;
       view.Load += View_Load;
   } 

   private void View_Load(object sender, EventArgs e)
   {
       var data = // get from model
       view.LoadList(data);
   }
}

和的问题是，在TESTFORM我需要参照AppSignature。 在我看到的教程，有喜欢一些简单的例子 公共无效LoadList（IEnumerable的＆LT;字符串＆GT;数据）那里是没有必要的参考模型。但是，如何即DataGridView的可以发布当前行的数据？

and the problem is that in TestForm I need reference to AppSignature. In all tutorials I saw, there are some simple examples like public void LoadList(IEnumerable<String> data) where there is no need reference to model. But how i.e DataGridView can publish current row data?

推荐答案

您的形式是一个视图，它是不是一个presenter。因此，它应该实现接口 ITestView ：

Your form is a View, it is not a Presenter. Thus it should implement interface ITestView:

public interface ITestView
{
    event EventHandler Load;
    void LoadList(IEnumerable<AppSignatureDto> data);
}

和你的presenter是一个人，谁订阅查看的事件，并使用视图属性读取和更新视图：

And your Presenter is someone, who subscribes to view's events and uses view properties to read and update view:

public class TestPresenter
{
   private ITestView view;

   public TestPresenter(ITestView view)
   {  
       this.view = view;
       view.Load += View_Load;
   } 

   private void View_Load(object sender, EventArgs e)
   {
       List<AppSignature> signatures = // get from model
       List<AppSignatureDto> signatureDtos = // map domain class to dto
       view.LoadList(signatureDtos);
   }
}

和你形成，正如我已经说过，是一个视图，它不知道presenter和型号什么：

And you form, as I already said, is a view, it does not know anything about presenter and model:

public partial class TestForm : Form, ITestView
{
    public event EventHandler Load;    

    private void ButtonLoad_Click(object sender, EventArgs e)
    {
        if (Load != null)
            Load(this, EventArgs.Empty);
    }

    public void LoadList(IEnumerable<AppSignatureDto> data)
    {
        // populate grid view here
    }
} 

如何处理参照域类？通常我提供，仅查看简单的数据（字符串，整数，日期等），或创建数据传输对象，它传递给视图（您可以命名他们FooView，FooDto等）。您可以轻松地将它们映射的东西，如 AtoMapper ：

List<AppSignatureDto> signatureDtos = 
      Mapper.Map<List<AppSignature>, List<AppSignatureDto>>(signatures);

这篇关于MVP查看知道型号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！