C# - WPF - 以编程方式创建按钮和单击事件
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C# - WPF - create buttons and click event programatically
提问by KinectUser
I have a question. Is it possible to create dynamically buttons and click events to it ? For example I want to create 4 buttons with 4 different click events. It is not necessary to make it with MVVM pattern. At the begining I would like just to know is it possible and how can I achieve this.
我有个问题。是否可以动态创建按钮和点击事件？例如，我想用 4 个不同的点击事件创建 4 个按钮。没有必要用 MVVM 模式来制作它。一开始我只想知道这是否可能以及如何实现。
回答by Arman Nagaepetian
Yes it is possible :
对的，这是可能的 ：
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();
}
回答by taquion
Yeap.
是的。
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
}
You can have several event handlers and add and remove them as needed.
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。
回答by Ivan Vargas
One possible way is binding the ItemsSourceproperty to a collection in your view model, i.e.
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>
This is of course using MVVM. The View Model would have some kind of collection of CommandViewModel, something like
这当然是使用 MVVM。视图模型会有某种集合CommandViewModel，比如
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()
{
// ....
}
}
Some of the classes (CommandViewModeland RelayCommand) are taken from Josh Smith's article. I just typed code in here, you might want to double check there are no syntax errors.
一些类（CommandViewModel和RelayCommand）取自Josh Smith 的文章。我刚刚在这里输入了代码，您可能需要仔细检查是否有语法错误。
I hope it helps
我希望它有帮助
