MVVM using WPF and C#

本文关键字：and WPF using MVVM | 更新日期: 2023-09-27 18:09:53

我最近从WinForms转移到WPF，我发现很难区分ViewModel和View。我在ViewModel中设计整个视图。尽管它有效，但我确信它不是正确的方法。

无论如何我可以分开视图和ViewModel不修改太多?我对此做了一些研究，但没有多大帮助。

编辑

XAML 

<Window x:Class="PackageDeliveryTool.FolderCheck"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Main Window" Height="350" Width="640" ResizeMode="NoResize" ShowInTaskbar="False" Topmost="True" Cursor="Arrow" Closing="Window_Closing">
<!-- From here is the XAML view code which includes button/Grid/StackPanel etc -->
    </Window>

我有单独的CS文件模型。它有属性和propertyChanged Events.

这是特定窗口的XAML.Cs文件。有动作和模型对象，

public partial class CopyMessageWindow : Window
{
    Model m = new Model("someValue");
    public CopyMessageWindow()
    {
        InitializeComponent();
    }

    public void StartButton_Click(object sender, RoutedEventArgs e){
        //Some code goes here uses Model instance
    }
public void OtherLogicMethod(int val){
    //Some other logic not related to UI, but to Background program. Also uses Model Instance
    }
    private void CancelButton_Click(object sender, RoutedEventArgs e)
    {
        //When cancel button is clicked, uses Model instance
    }
}

EDITx2

我已经写了很多代码。我需要一个更简单的方法来分离视图和ViewModel。

MVVM using WPF and C#

按以下步骤操作:

1。创建您的模型:

 public class Model
 {
    public string  Name { get; set; }
 }

2。创建你的ViewModel，它将是你的视图DataContext:

public class MainViewModel : BindableBase
  {      
    public MainViewModel()
    {
        _model = new Model {Name = "Test"};
    }
    private Model _model;
    public Model Model
    {
        get
        {
            return _model;
        }
        set
        {
            _model = value;
            OnPropertyChanged("Model");       
        }
    }
}

3。为了实现完全分离的MVVM模式，让view.cs为空:

 public partial class MainWindow : Window
   {
    public MainWindow()
    {
        InitializeComponent();
    }
   }

4。创建视图并将DataContext设置为ViewModel:

    <Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    DataContext="{StaticResource MainViewModel}"><Grid><TextBlock Text="{Binding Model.Name, Mode=TwoWay}"/></Grid></Window>

5。实现你的BindableBase:

public class BindableBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged = delegate { };
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            var e = new PropertyChangedEventArgs(propertyName);
            handler(this, e);
        }
    }
}
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