Question

我有一个问题。是否可以动态创建按钮并单击事件？例如，我想创建4个按钮，其中包含4个不同的点击事件。没有必要使用MVVM模式。在开始时我想知道它是否可能，我怎样才能实现这一目标。

Answer 1

是的，有可能：

 public MainWindow()
    {
        InitializeComponent();

        var button = new Button() {Content = "myButton"}; // Creating button
        button.Click += Button_Click; //Hooking up to event
         myGrid.Children.Add(button); //Adding to grid or other parent

    }

    private void Button_Click(object sender, RoutedEventArgs e) //Event which will be triggerd on click of ya button
    {
        throw new NotImplementedException();
    }

Answer 2

叶氏。

 public MainWindow()
    {
        InitializeComponent();

        var btn1 = new Button{Content = "btn1"};

        //add event handler 1
        btn1.Click += ClickHandler1;

        //removes event handler 1
        btn1.Click -= ClickHandler1;

        //add event handler 2
        btn1.Click += ClickHandler2;

        Panel.Children.Add(btn1);

    }

    private void ClickHandler1(object sender, RoutedEventArgs e)
    {
        //do something
    }

    private void ClickHandler2(object sender, RoutedEventArgs e)
    {
        //do something
    }

    private void ClickHandler3(object sender, RoutedEventArgs e)
    {
        //do something

    }

您可以拥有多个事件处理程序，并根据需要添加和删除它们。

Answer 3

一种可能的方法是将ItemsSource属性绑定到视图模型中的集合，即

   <ItemsControl ItemsSource="{Binding Commands}">
      <ItemsControl.ItemTemplate>
         <DataTemplate>
             <Button Command="{Binding Command}" Content="{Binding DisplayName}" />
         <DataTemplate>
      <ItemsControl.ItemTemplate>
   </ItemsControl>

这当然是使用MVVM。视图模型将具有某种CommandViewModel的集合，类似于

   public class ControlViewModel
   {
      public Collection<CommandViewModel> Commands { get; }

      public ControlViewModel()
      {
           // Here have logic to determine which commands are added to the collection
         var command1 = new RelayCommand(p => ActionForButton1());
         var command2 = new RelayCommand(p => ActionForButton2());

         Commands = new Collection<CommandViewModel>();
         Commands.Add(new CommandViewModel(command1, "Button 1"));
         Commands.Add(new CommandViewModel(command2, "Button 2"));

      }

      private void ActionForButton1()
      {
         // ....
      }

      private void ActionForButton2()
      {
         // ....
      }
   }

某些课程（CommandViewModel和RelayCommand）取自Josh Smith's article。我只是在这里输入代码，你可能想要仔细检查没有语法错误。

我希望它有所帮助

C＃ - WPF - 以编程方式创建按钮和单击事件

3 个答案: