WPF：如何覆盖自定义控件中的加载事件

Question

I would like to override the Loaded event in my Custom control but I don't know how to do it.

I wanted to do like this example but knowing that base.OnLoaded does not exist I don't know how to do it

https://stackoverflow.com/a/28326029/14338640

You can create a custom control and override the events. refer the below code i tried for TextBox control.

 class TextBoxEx : TextBox { protected override void OnTouchUp(System.Windows.Input.TouchEventArgs e) { base.OnTouchUp(e); } protected override void OnTouchDown(System.Windows.Input.TouchEventArgs e) { base.OnTouchDown(e); } }

For information my custom control inherits from UserControl .

Answer 1

You do not "override an event". You override a method or attach an event handler.

Since there is no OnLoaded method to override, your only option is to attach an event handler.

public YourControl()
{
    InitializeComponent();
    Loaded += OnLoaded;
}

private void OnLoaded(object sender, RoutedEventArgs e)
{
}