使用Command可以实现UI层跟业务层分离，不必在UI层定义事件方法，近而减少耦合。
下一章是关于内容变更在界面上重新展示。
界面展示_UI层
<Window x:Class="WpfApp1.Window5"
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"
xmlns:local="clr-namespace:WpfApp1"
mc:Ignorable="d"
Title="Window5" Height="450" Width="800">
<Grid>
<StackPanel>
<TextBox Text="{Binding Name}"></TextBox>
<Button Command="{Binding ShowCommand }" Content="Button" Height="100"></Button>
</StackPanel>
</Grid>
</Window>界面代码绑定数据
/// <summary>
/// Window5.xaml 的交互逻辑
/// </summary>
public partial class Window5 : Window
{
public Window5()
{
this.DataContext = new MainViewModel();
InitializeComponent();
}
}新建命令类、继承ICommand
public class MyCommand : ICommand
{
public event EventHandler CanExecuteChanged;
Action executeAction;
public MyCommand(Action action)
{
executeAction = action;
}
public bool CanExecute(object parameter)
{
return true;
}
public void Execute(object parameter)
{
executeAction();
}
}实现方法_业务层
public class MainViewModel
{
public MyCommand ShowCommand { get; set; }
public String Name { get; set; }
public MainViewModel()
{
Name = "Hello World";
ShowCommand = new MyCommand(Show);
}
public void Show()
{
Name = "点击了Button";
MessageBox.Show(Name);
}
}标签：ICommand,MyCommand,Name,executeAction,命令,WPF,public From： https://www.cnblogs.com/xxxyz/p/16652038.html