关于datagrid分页的有关问题,

关于datagrid分页的问题,在线等。。。。
我新做了一个datagrid分页的程序,但是出现的问题是:

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编译错误  
说明:   在编译向该请求提供服务所需资源的过程中出现错误。请检查下列特定错误详细信息并适当地修改源代码。  

编译器错误信息:   CS0122:   不可访问“Test.WebForm2.DataGrid1_PageIndexChanged(object,   System.Web.UI.WebControls.DataGridPageChangedEventArgs)”,因为它受保护级别限制

源错误:

 

行   11:   <body   MS_POSITIONING= "GridLayout ">
行   12:   <form   id= "Form1 "   method= "post "   runat= "server ">
行   13:   <asp:DataGrid   id= "DataGrid1 "   style= "Z-INDEX:   101;   LEFT:   8px;   POSITION:   absolute;   TOP:   8px "   runat= "server "   PageSize= "3 "   AllowPaging= "True "   OnPageIndexChanged= "DataGrid1_PageIndexChanged() ">
行   14:   <PagerStyle   NextPageText= "下一页 "   PrevPageText= "上一页 "> </PagerStyle>
行   15:   </asp:DataGrid>
 

源文件:   http://localhost/Test/WebForm2.aspx         行:   13  


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分页页面是WebForm2.aspx
代码如下:


<%@   Page   language= "c# "   Codebehind= "WebForm2.aspx.cs "   AutoEventWireup= "false "   Inherits= "Test.WebForm2 "   %>
<!DOCTYPE   HTML   PUBLIC   "-//W3C//DTD   HTML   4.0   Transitional//EN "   >
<HTML>
<HEAD>
<title> WebForm2 </title>
<meta   name= "GENERATOR "   Content= "Microsoft   Visual   Studio   .NET   7.1 ">
<meta   name= "CODE_LANGUAGE "   Content= "C# ">
<meta   name= "vs_defaultClientScript "   content= "JavaScript ">
<meta   name= "vs_targetSchema "   content= "http://schemas.microsoft.com/intellisense/ie5 ">
</HEAD>
<body   MS_POSITIONING= "GridLayout ">
<form   id= "Form1 "   method= "post "   runat= "server ">
<asp:DataGrid   id= "DataGrid1 "   style= "Z-INDEX:   101;   LEFT:   8px;   POSITION:   absolute;   TOP:   8px "   runat= "server "   PageSize= "3 "   AllowPaging= "True "   OnPageIndexChanged= "DataGrid1_PageIndexChanged() ">
<PagerStyle   NextPageText= "下一页 "   PrevPageText= "上一页 "> </PagerStyle>
</asp:DataGrid>
</form>
</body>
</HTML>


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后台代码是:


using   System;
using   System.Collections;
using   System.ComponentModel;
using   System.Data;
using   System.Drawing;
using   System.Web;
using   System.Web.SessionState;
using   System.Web.UI;
using   System.Web.UI.WebControls;
using   System.Web.UI.HtmlControls;
using   System.Data.SqlClient;

namespace   Test
{
///   <summary>
///   WebForm2   的摘要说明。
///   </summary>
public   class   WebForm2   :   System.Web.UI.Page