页面生命周期

1 Page Request  --页面请求
2 Start  --开始
3 Page Initialization --页初始化
4 Load  --加载
5 Validation --验证
6 Postback event handling --回发事件处理
7 Rendering --呈现

8 Unload  --卸载

  public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_PreInit(object sender, EventArgs e)
        {
            Response.Write("Page_PreInit<br/>");
        }
        protected void Page_Init(object sender, EventArgs e)
        {
            Response.Write("Page_Init<br/>");

        }
        protected void Page_InitComplete(object sender, EventArgs e)
        {
            Response.Write("Page_InitComplete<br/>");

        }
        protected void Page_PreLoad(object sender, EventArgs e)
        {
            Response.Write("Page_PreLoad<br/>");

        }
        protected void Page_Load(object sender, EventArgs e)
        {
            Response.Write("Page_Load<br/>");

        }
        protected void Page_LoadComplete(object sender, EventArgs e)
        {
            Response.Write("Page_LoadComplete<br/>");

        }
        protected void Page_PreRender(object sender, EventArgs e)
        {
            Response.Write("Page_PreRender<br/>");

        }
        protected void Page_SaveStateComplete(object sender, EventArgs e)
        {
            Response.Write("Page_SaveStateComplete<br/>");

        }


        /// <summary>
        /// 因为在卸载阶段，页及其控件已被呈现，因此无法对响应流做进一步更改。如果尝试调用方法如Response.Write方法，则该页会引发异常。
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Unload(object sender, EventArgs e)
        {
            int i = 0;
            i++;//这行代码是用来设置断点的，为什么不用Response.Write? *****

        }


        protected void Button1_Click(object sender, EventArgs e)
        {
            Label1.Text = "ControlEvent";
            Response.Write("Button事件触发！<br/>");
        }