ASP.Net页面生命周期与Page_Load方法的工作原理介绍

public partial class _Default : System.Web.UI.Page
{
    protected int i = 1;

    protected void Page_PreInit(object sender, EventArgs e)
    {
        Response.Write(i + ".PreInit:当页面初始化开始时发生");
        i++;
        Response.Write("");
    }

    protected void Page_Init(object sender, EventArgs e)
    {
        Response.Write(i + ".Init:当服务器空间初始化时发生");
        i++;
        Response.Write("");
    }

    protected void Page_InitComplete(object sender, EventArgs e)
    {
        Response.Write(i + ".InitComplete:当页初始化完成时发生");
        i++;
        Response.Write("");
    }

    protected void Page_PreLoad(object sender, EventArgs e)
    {
        Response.Write(i + ".PreLoad:当页load事件前发生");
        i++;
        Response.Write("");
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write(i + ".Load:当服务器控件加载到Page对象中时发生(加载页面时)");
        i++;
        Response.Write("");

        //在Load和LoadComplete之间会执行控件事件.
        //如 Button 控件的 Click 事件或 TextBox 控件的 TextChanged 事件。
    }

    protected void Page_LoadComplete(object sender, EventArgs e)
    {
        Response.Write(i + ".LoadComplete:当页面生命周期的加载阶段结束时发生");
        i++;
        Response.Write("");
    }

    protected void Page_PreRender(object sender, EventArgs e)
    {
        Response.Write(i + ".PreRender:当页加载控件之后,呈现之前发生,使用该事件对页或其控件的内容进行最后更改(预呈现)");
        i++;
        Response.Write("");
    }


    protected void Page_PreRenderComplete(object sender, EventArgs e)
    {
        Response.Write(i + ".PreRenderComplete:呈现内容前发生.(预呈现完成)");
        i++;
        Response.Write("");
    }

    protected void Page_SaveStateComplete(object sender, EventArgs e)
    {
        

        Response.Write(i + ".SaveStateComplete:在页已完成对页和页上控件的所有视图状态和控件状态信息的保存后发生.");
        i++;
        Response.Write("");

        


        
    }
}

public partial class Default : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("2");
    }
 
    protected override void OnLoad(EventArgs e)
    {
        Response.Write("1");
        base.OnLoad(e);
        Response.Write("3");
    }
}