c# - 在 MVP 中的用户控件之间传递 UI 实体

Question

我是第一次实现 MVP 模式。我的应用程序是一个向导。只有一个表单，并且其中嵌入了多个用户控件。每个控件都是一个视图，每个视图都有一个演示者。我正在尝试实现被动 MVP 模式。演示者负责处理所有操作并更新视图。

问题是通过 UI 实体。我想将用户输入从我的第一个视图传递到第二个视图，因为第二个视图需要对其进行处理。

所有视图都在 Win Form 上实例化。

任何帮助将不胜感激。

问候

Answer 1

我在考虑以下场景：创建一个用于持有不同视图的枚举

public enum Views{
First,Second, Manager,Third,
}

为您的按钮状态创建一个可枚举

public enum ButtonState{Start,Next,Cancel,Back,}

创建将保存所有数据的类

public class MyData
{
  //properties here
  //Also have a default constructor
  public MyData()
  {
  }
}

然后在您的表单中使用以下新项目：

Public Views MyViewState { get; set;}
Public ButtonState MyButtonState { get; set;}
Public MyData dataclass { get; set;}

Public Form1()
{
InitializeComponent();
MyViewState = Views.First;
MyButtonState = ButtonState.Start;
dataclass = new MyData(); //mostly at startup your class data is empty ...
ControlViews();
}

Public void ControlViews()
{
    //Based on your Buttons you will do what each form is asked to do:
      switch(MyButtonState)
      {
       case ButtonState.Start:
        //Since this is your startup: you only need to show your next view and replace you MyViewState
        MyViewState = Views.First;
        ///code for showing your view
       Break;
       case ButtonState.Next:
        //Since this time you probably filled in data you need to know in which MyViewState you are
         Switch (MyViewState)
         {
          Case Views.First:
           //You want to keep your data
           ///Code for placing data into your dataclass
           //After replacing the code, you then need to do some calculations and open the next view
           ///Code for calculations and placing this data in the form
           ///Code for opening the second view
           MyViewState = Views.Second;
          Break;
           // you then need to do this for each MyViewState
         }
       Break;
      }
}

使用这种系统的优点是您的所有数据都保留在课堂上，您只需显示/关闭您的视图。

这是我如何应对这种情况的一种方式。

Answer 2

您可以创建一个包含您需要的所有实体的类。当打开一个新窗口时，您在构造函数中传递类，瞧，您的数据已被传输。