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());

  }