Life Cycle

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Collections.Specialized;
using System.Diagnostics;

[ToolboxData("<{0}:LifeCycle runat=server></{0}:LifeCycle>")]
public partial class LifeCycle : UserControl, IPostBackEventHandler, IPostBackDataHandler
{
    protected override void OnInit(System.EventArgs e)
    {
        Trace("Lifecycle: Init Event.");
        base.OnInit(e);
    }
    protected override void TrackViewState()
    {
        Trace("Lifecycle: Track ViewState.");
        base.TrackViewState();
    }
    protected override void LoadViewState(object savedState)
    {
        Trace("Lifecycle: Load ViewState Event.");
        base.LoadViewState(savedState);
    }
    protected override void LoadControlState(object savedState)
    {
        Trace("Lifecycle: Load ControlState Event.");
        base.LoadControlState(savedState);
    }
    public override void DataBind()
    {
        Trace("Lifecycle: DataBind Event.");
        base.DataBind();
    }
    public bool LoadPostData(string postDataKey, NameValueCollection postCollection)
    {
        Trace("Lifecycle: Load PostBack Data Event.");
        Page.RegisterRequiresRaiseEvent(this);
        return true;
    }
    protected override void OnLoad(System.EventArgs e)
    {
        Trace("Lifecycle: Load Event.");
        base.OnLoad(e);
    }
    public void RaisePostDataChangedEvent()
    {
        Trace("Lifecycle: Post Data Changed Event.");
    }
    public void RaisePostBackEvent(string argument)
    {
        Trace("Lifecycle: PostBack Event.");
    }
    protected override void OnPreRender(System.EventArgs e)
    {
        Trace("Lifecycle: PreRender Event.");
        Page.RegisterRequiresPostBack(this);
        base.OnPreRender(e);
    }
    protected override object SaveViewState()
    {
        Trace("Lifecycle: Save ViewState.");
        return base.SaveViewState();
    }
    protected override object SaveControlState()
    {
        Trace("Lifecycle: Save ControlState.");
        return base.SaveControlState();
    }
    protected override void Render(HtmlTextWriter writer)
    {
        base.Render(writer);
        Trace("Lifecycle: Render Event.");
        writer.Write("<h3>LifeCycle Control</h3>");
    }
    protected override void OnUnload(System.EventArgs e)
    {
        Trace("Lifecycle: Unload Event.");
        base.OnUnload(e);
    }
    public override void Dispose()
    {
        Trace("Lifecycle: Dispose Event.");
        base.Dispose();
    }
    private void Trace(string info)
    {
        if (Context != null)
        {
            Context.Trace.Warn(info);
            Debug.WriteLine(info);
        }
    }
}

来源：https://www.cnblogs.com/aspxphpjsprb/archive/2008/06/13/1220893.html