两个粒度看Asp.net生命周期

bsp;e)
48    {
49        Response.Write("Page_SaveStateComplete<br/>");
50
51    }
52
53   
54    protected void Page_Unload(object sender, EventArgs e)
55    {
56        int i = 0;
57        i++;//这行代码是用来设置断点的，为什么不用Response.Write？你说呢？
58
59    }
60
61
62    protected void Button1_Click(object sender, EventArgs e)
63    {
64        Label1.Text = "ControlEvent";
65        Response.Write("Button事件触发！<br/>");
66    }
67}
68
69
70
运行结果：
 

Page_PreInit

Page_Init

Page_InitComplete

Page_PreLoad

Page_Load

Page_LoadComplete

Page_PreRender

Page_SaveStateComplete

点击页面的Button后的输出：

Page_PreInit

Page_Init

Page_InitComplete

Page_PreLoad

Page_Load

Button事件触发！

Page_LoadComplete

Page_PreRender

Page_SaveStateComplete

 

我们从一个更细的粒度，在Reflector中看Page对请求处理的代码：
private void PerformPreInit()
{
           this.OnPreInit(EventArgs.Empty);
    this.InitializeThemes();//看到主题和模板页是什么时候加载了吧
    this.ApplyMasterPage();
    this._preInitWorkComplete = true;
}


MSDN上对Asp.net生命周期解释有非常重要的四个表格：

 

Stage	Description
Page request	The page request occurs before the page life cycle begins. When the page is requested by a user, ASP.NET determines whether the page needs to be parsed and compiled (therefore beginning the life of a page), or whether a cached version of the page can be sent in response without running the page.
Start	In the start step, page properties such as Request and Response are set. At this stage, the page also determines whether the request is a postback or a new request and sets the IsPostBack property. Additionally, during the start step, the page''s UICulture property is set.
Page initialization	During page initialization, controls on the page are available and each control''s UniqueID property is set. Any themes are also applied to the page. If the current request is a postback, the postback data has not yet been loaded and control property values have not been restored to the values from view state.
Load	During load, if the current request is a postback, control properties are loaded with information recovered from view state and control state.
Validation	During validation, the Validate method of all validator controls is called, which sets the IsValid property of individual validator controls and of the page.
Postback event handling	If the request is a postback, any event handlers are called.
Rendering	Before rendering, view state is saved for the page and all controls. During the rendering phase, the page calls the Render method for each control, providing a text writer that writes its output to the OutputStream of the page''s Response property.
Unload	Unload is called after the page has been fully rendered, sent to the client, and is ready to be discarded. At this point, page properties such as Response and Request are unloaded and any cleanup is performed.