我的主要目标是在使用旧WinForms项目期间最大程度地减少工作时间成本。我以实现MCV + WinForms为例。有效。我有一个清晰的模型,但是Controller.cs中有两个方法(OnSuper()和WorkMethod())-我不喜欢它们。它们不具有功能性,但是当有人将黄油涂在没有面包的黄油上时,它们具有外观。没有MPV界面和WPF界面时,该如何升级?还是不是一个好方法,我必须创建一个新的WPF项目?
Class Model.cs
class Model
{
public int X { get; set; }
public int Y { get; set; }
public int R { get; set; }
public Model() { }
public Model(int x, int y)
{
X = x;
Y = y;
}
public int GetRes()
{
return X + Y;
}
}
Form1.cs
类public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
button1.Click += delegate
{
Controller controller = new Controller
(
this,
Int32.Parse(this.textBox1.Text),
Int32.Parse(this.textBox2.Text)
);
controller.SuperEvent += Controller_SuperEvent;
controller.OnSuper();
};
}
private void Controller_SuperEvent(object sender, EventArgs e)
{
Controller controller = sender as Controller;
textBox3.Text = controller.WorkMethod();
controller.WorkMethod();
}
}
和类Controller.cs
class Controller
{
public event EventHandler SuperEvent;
Model model;
Form1 form1;
public int Result { get; set; }
public int CX { get; set; }
public int CY { get; set; }
public Controller(Form1 form1, int cX, int cY)
{
this.form1 = form1;
this.model = new Model();
CX = cX;
CY = cY;
}
public void OnSuper()
{
SuperEvent?.Invoke(this, EventArgs.Empty);
}
public string WorkMethod()
{
model.X = CX;
model.Y = CY;
return model.GetRes().ToString();
}
}
答案 0 :(得分:0)
为简化可维护性,在层级职责之间划清界限。
负责业务逻辑的模型
class Model
{
public int X { get; set; }
public int Y { get; set; }
public Model() {}
public int GetRes() => X + Y
}
ViewModel负责准备要在视图中显示的数据(如果需要),并调用从视图中请求的模型的业务逻辑操作。
INotifyPropertyChanged
将通知视图有关可能的更改,而视图模型不依赖于具体的视图类型。
class ViewModel : INotifyPropertyChanged
{
private readonly Model _model;
public int X { get; set; }
public int Y { get; set; }
private string _result = "";
public string Result
{
get
{
return _result;
}
private set
{
if (_result.Equals(value) == false)
{
_result = value;
RaisePropertyChanged();
}
}
}
public ViewModel(Model model) => _model = model;
public void CalculateResult()
{
Result = _model.GetRes().ToString();
}
// Implementation of INotifyPropertyChanged
public event PropertyChangedEventHandler PropertyChanged;
private void RaisePropertyChanged([CallerMemberName] string propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
视图,其职责是显示来自视图模型的值或在用户请求时调用视图模型操作。
public partial class View : Form
{
private ViewModel _viewmodel;
public View()
{
InitializeComponent();
var model = new Model { X = 10, Y = 20 }
_viewmodel = new ViewModel(model);
// Bind controls to the viewmodel
textboxForX.DataBindings.Add("Text", _viewmodel, "X", true);
textboxForY.DataBindings.Add("Text", _viewmodel, "Y", true);
labelForResult.DataBindings.Add("Text", _viewmodel, "Result", true);
}
private void CalculateButton_Click(object sender, EvetnArgs e)
{
_viewmodel.Calculate();
}
}
请注意,在简单情况下(如上所述),您可以跳过viewmodel的“图层”并将视图直接绑定到模型。但是,在项目开始成长时,在视图和业务逻辑之间留有“缓冲”将使您的生活更加轻松。