C# 页面加载时停止触发事件

我有一个复选框，带有

IsChecked=“true”

属性和

已选中事件：

<CheckBox Checked="myChBox_Checked" IsChecked="True" />

我应该如何停止启动触发？
例如，您可以：


在页面中订阅。加载的事件：


或者最好在事件中检查
null
：

private void myChBox_Checked(object sender, RoutedEventArgs e)
{
     if (something == null) return;
     myComboBox ... // NullReferenceException
}


您只需在事件处理程序中检查空引用，或在加载的
页面中分配空引用
事件处理程序：

public partial class MyPage : Page 
{
    public MyPage()
    {
        InitializeComponent();
        this.Loaded += page_Loaded;
    }

    private void page_Loaded(object sender, RoutedEventArgs e)
    {
        myChBox.Checked += myChBox_Checked;
    }

    private void myChBox_Checked(object sender, RoutedEventArgs e) 
    {
        if (myComboBox != null)
        {
           myComboBox ... // Should not be null, but check anyway
        }
    }

}

private void myChBox_Checked(object sender, RoutedEventArgs e)
{
     if (something == null) return;
     myComboBox ... // NullReferenceException
}

public partial class MyPage : Page 
{
    public MyPage()
    {
        InitializeComponent();
        this.Loaded += page_Loaded;
    }

    private void page_Loaded(object sender, RoutedEventArgs e)
    {
        myChBox.Checked += myChBox_Checked;
    }

    private void myChBox_Checked(object sender, RoutedEventArgs e) 
    {
        if (myComboBox != null)
        {
           myComboBox ... // Should not be null, but check anyway
        }
    }