好久沒有上CSDN了﹐今天小試牛刀,關于asp.net的事件執行的原理,该怎么处理

好久沒有上CSDN了﹐今天小試牛刀,關于asp.net的事件執行的原理
<aspatagrid   id= "da1 "   Runat= "server "   CellPadding= "2 "   CellSpacing= "1 "   BackColor= "#3366CC "  
Width= "99% "   BorderWidth= "0 "   AutoGenerateColumns= "False "   AllowPaging= "True "   PageSize= "10 "  
PagerStyle-Mode= "NumericPages "   OnPageIndexChanged= "PageIndexChanged ">

OnPageIndexChanged= "PageIndexChanged "
this.da1.PageIndexChanged+=new   DataGridPageChangedEventHandler(da1_PageIndexChanged);
和在aspx.cs中寫OnPageIndexChanged= "PageIndexChanged "

在aspx添加處理程序和在aspx.cs文件添加處理程序有什么區別?

------解决方案--------------------------------------------------------
不用第二种方式的.