使用Sql语句实现AspNetPager分页的范例

上一篇中介绍如何使用AspNetPager+DataGrid做分页。 这一篇是介绍使用Sql语句来做分页
其实最重要的问题就在
 Select Top  {0} *  From User Where user_id Not in ( Select Top {1} user_id From User Order By user_id

使用sql本身已经把要分页的数据取出来。。其实DataGrid只是绑定显示而已。AspNetPager只是做了显示页码等数据显示而已

private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   if(!Page.IsPostBack )
   {
    //求该数据集合的记录总和
    SqlDataBase SqlDB=new SqlDataBase(DSN);
    string strsql="Select count(user_id) from User";
    DataSet ds= SqlDB.CreateSet(strsql,"IUser");
    this.AspNetPager1.RecordCount=System.Convert.ToInt32(ds.Tables[0].Rows[0][0]) ;
    SqlDB.CloseConnection();
    BindData();
   }
  }

void BindData()
  {
   SqlDataBase SqlDB=new SqlDataBase(DSN);
  
   int RecordPage=(AspNetPager1.CurrentPageIndex-1)*AspNetPager1.PageSize;
   string strsql=String.Format(" Select Top  {0} *  From User Where user_id Not in ( Select Top {1} user_id From User Order By user_id)",AspNetPager1.PageSize.ToString(),RecordPage.ToString());
   SqlDataAdapter adapter= SqlDB.CreateAdapter(strsql);
   DataSet ds=new DataSet();
   ds=SqlDB.CreateSet(strsql,"IUser");
   //adapter.Fill(ds,AspNetPager1.PageSize*(AspNetPager1.CurrentPageIndex-1),AspNetPager1.PageSize,"IU_User");  
   this.DataGrid1.DataSource=ds.Tables["IUser"];
   this.DataGrid1.DataBind();
   //动态设置用户自定义文本内容
   AspNetPager1.CustomInfoText="记录总数：<font color=\"blue\"><b>"+AspNetPager1.RecordCount.ToString()+"</b></font>";
   AspNetPager1.CustomInfoText+=" 总页数：<font color=\"blue\"><b>"+AspNetPager1.PageCount.ToString()+"</b></font>";
   AspNetPager1.CustomInfoText+=" 当前页：<font color=\"red\"><b>"+AspNetPager1.CurrentPageIndex.ToString()+"</b></font>";
  }

private void AspNetPager1_PageChanged(object src, Wuqi.Webdiyer.PageChangedEventArgs e)
  {
   AspNetPager1.CurrentPageIndex=e.NewPageIndex;
   BindData();
   System.Text.StringBuilder sb=new StringBuilder("<script Language=\"Javascript\"><!--\n");
   sb.Append("var el=document.all;");
   sb.Append(this.DataGrid1.ClientID);
   sb.Append(".scrollIntoView(true);");
   sb.Append("<");
   sb.Append("/");
   sb.Append("script>");
   if(!Page.IsStartupScriptRegistered("scrollScript"))
    Page.RegisterStartupScript("scrollScript",sb.ToString());
  }