Wp8程序加载运行顺序（菜鸟篇）

第一次加载程序：

This is App
This is Application_Launching
This is MainPage()
This is OnNavigatedTo
This is MainPage_Loaded()

返回键离开：

This is OnNavigatingFrom
This is OnNavigatedFrom
This is Application_Closing
This is ~MainPage()

Home键离开：

This is OnNavigatingFrom
This is OnNavigatedFrom
This is Application_Deactivated

Home键离开后启动：

This is Application_Activated
This is OnNavigatedTo

以上就是WP8程序开启离开的常用事件运行顺序，仅供像我一样的菜鸟学习；

扩展：上面顺序就可以很好解释下面（为什么NavigationContext在构造函数写的话会出现NullReference）：

发送页面发送字符串：

NavigationService.Navigate(new  Uri("/Page.2xaml?msg=" + textBox1.Text, 
 
UriKind.Relative)); 

接受页面接受字符串：
protected override void OnNavigatedTo( 
System.Windows.Navigation.NavigationEventArgs e) 
{ 
　　base.OnNavigatedTo(e); 

　　string msg = string.Empty; 

　　if (NavigationContext.QueryString.TryGetValue("msg", out msg)) 
　　{
　　　　textBlock1.Text = msg
　　}

}

 原文地址：http://www.cnblogs.com/Yukang1989/archive/2012/11/22/2783121.html