ASP.NET 页生命周期概述

        protected void Page_PreInit(object sender, System.EventArgs e)
        {
            if (IsPostBack)
            {
                //Label1.Text += "Page.PreInti Event<br/>";
            }
        }

        protected void Page_Init(object sengder, EventArgs e)
        {
            Label1.Text += "Page.Init Event<br/>";
        }

        protected void Page_InitComplete(object sender, EventArgs e)
        {
            Label1.Text += "Page.InitComplete<br/>";
        }

        protected void Page_PreLoad(object sender, EventArgs e)
        {
            Label1.Text += "Page.PreLoad Event<br/>";
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            Label1.Text += "Page.Load Event<br/>";
            if (Page.IsPostBack)
            {
                Label1.Text += "Send back request<br/>";
            }
        }

        protected void Page_LoadComplete(object sender, EventArgs e)
        {
            Label1.Text += "Page.LoadComplete Event<br/>";
        }

        protected void Page_PreRender(object sender, EventArgs e)
        {
            Label1.Text += "Page.PreRender Event<br/>";
        }

        protected void Page_Render(object sender, EventArgs e)
        {
            Label1.Text += "Page.Render Event";
        }

        protected void Page_Unload(object sender, EventArgs e)
        {
            //Label1.Text += "Page.Unload Event<br/>";
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text += "Button.Click Event<br/>";
        }

　　http://msdn.microsoft.com/zh-cn/library/ms178472.aspx#general_page_lifecycle_stages