sql百萬級資料通用分頁類asp.net版

using System;
using System.Data;
using System.Data.SqlClient;

namespace Pagination.Class
{
 /// <summary>
 /// Pager 的摘要說明。
 /// </summary>
 public class Pager
 {
  public Pager()
  {
   //
   // TODO: 在此處添加建構函式邏輯
   //
  }
  /// <param name="fieldlist"></param>欄位列表，如id,title,content
  /// <param name="condition"></param>條件，如id<100
  /// <param name="pkey"></param>主鍵，自增
  /// <param name="tablename"></param>表的名字，如News
  /// <param name="sort"></param>排序，0表示降序，1表示升序
  /// <param name="pagesize"></param>每頁大小
  /// <param name="cpage"></param>當前頁碼
  public DataSet GetCurrentDataSet(string fieldlist,string condition,string pkey,string tablename,int sort,int pagesize,int cpage)//得到當前頁記錄
  {
   SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["cs"]);
   SqlDataAdapter cmd=new SqlDataAdapter(GetSql(fieldlist,condition,pkey,tablename,sort,pagesize,cpage),conn);
   DataSet ds=new DataSet();
   cmd.Fill(ds);
   return ds;
  }
  static string GetSql(string fieldlist,string condition,string pkey,string tablename,int sort,int pagesize,int cpage)
  {
   string sql="";
   if(sort==0)
   {
    if(condition!="")
    {
     sql="select top "+pagesize.ToString()+" "+fieldlist+" from "+tablename+" where "+condition+" and "+pkey+" not in(select top "+pagesize*(cpage-1)+" "+pkey+" from "+tablename+" where "+condition+" and order by "+pkey+" desc) order by "+pkey+" desc";
    }
    else
    {
     sql="select top "+pagesize.ToString()+" "+fieldlist+" from "+tablename+" where "+pkey+" not in(select top "+pagesize*(cpage-1)+" "+pkey+" from "+tablename+" order by "+pkey+" desc) order by "+pkey+" desc";
    }
   }
   else
   {
    if(condition!="")
    {
     sql="select top "+pagesize.ToString()+" "+fieldlist+" from "+tablename+" where "+condition+" and "+pkey+" not in(select top "+pagesize*(cpage-1)+" "+pkey+" from "+tablename+" where "+condition+" and order by "+pkey+" asc) order by "+pkey+" asc";
    }
    else
    {
     sql="select top "+pagesize.ToString()+" "+fieldlist+" from "+tablename+" where "+pkey+" not in(select top "+pagesize*(cpage-1)+" "+pkey+" from "+tablename+" order by "+pkey+" asc) order by "+pkey+" asc";
    }
   }
   return sql;
  }
  public int GetCounts(string pkey,string tablename,string condition)//得到總記錄數
  {
   string sql;
    if(condition!="")
    {
        sql="select count("+pkey+") from "+tablename where "+condition;
    }
    else
    {
        sql="select count("+pkey+") from "+tablename;
    }
   SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["cs"]);
   SqlCommand cmd=new SqlCommand(sql,conn);
   conn.Open();
   SqlDataReader dr=cmd.ExecuteReader(CommandBehavior.CloseConnection);
   dr.Read();
   string str=dr[0].ToString();
   dr.Close();
   return Convert.ToInt32(str);
  }
 }
}
這裡可以輸出總記錄數和當前頁面的dataset。

針對此通用分頁類的調用執行個體
1  建表News
CREATE TABLE [News] (
 [id] [int] IDENTITY (1, 1) NOT NULL ,
 [title] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,
 [content] [text] COLLATE Chinese_PRC_CI_AS NULL ,
 CONSTRAINT [PK_News] PRIMARY KEY  CLUSTERED
 (
  [id]
 )  ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
2  建立產生資料的預存程序
create proc addnews
@count int
as
declare @i int
set @i=0
set nocount on
while @i<@count
begin
set @i=@i+1
insert into news (title,content) values ('百萬級資料分頁測試','Test by 逐日★風')
end
set nocount off
GO
3  產生資料
addnews 2000000

4  建立Aspx檔案
<asp:Repeater id="Repeater1" runat="server">
 <HeaderTemplate>
  <table width="800" border="1" cellpadding="3">
 </HeaderTemplate>
 <ItemTemplate>
  <tr>
   <td><%#DataBinder.Eval(Container.DataItem,"id")%></td>
   <td><%#DataBinder.Eval(Container.DataItem,"title")%></td>
   <td><%#DataBinder.Eval(Container.DataItem,"content")%></td>
  </tr>
 </ItemTemplate>
 <FooterTemplate>
  </table>
 </FooterTemplate>
</asp:Repeater>
<div align="center"><FONT face="宋體">共</FONT>
 <asp:Label id="lblcount" runat="server"></asp:Label><FONT face="宋體">條記錄，當前
  <asp:Label id="lblcurrent" runat="server"></asp:Label>頁&nbsp;&nbsp;
  <asp:LinkButton id="hlprev" runat="server">上頁</asp:LinkButton>&nbsp;
  <asp:LinkButton id="hlnext" runat="server">下頁</asp:LinkButton>&nbsp;&nbsp;
  <asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True"></asp:DropDownList></FONT></div>
5  Cs檔案
protected System.Web.UI.WebControls.Label lblcount;
  protected System.Web.UI.WebControls.Label lblcurrent;
  protected System.Web.UI.WebControls.DropDownList DropDownList1;
  protected System.Web.UI.WebControls.LinkButton hlprev;
  protected System.Web.UI.WebControls.LinkButton hlnext;
  protected System.Web.UI.WebControls.Repeater Repeater1;
  private int pagesize=20;
  static int cpage;
  static int TotalPages;

  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此處放置使用者代碼以初始化頁面
   if(!this.IsPostBack)
   {
    cpage=1;
    Class.Pager pg=new Class.Pager();
    int Counts=pg.GetCounts("id","News","");
    lblcount.Text=Counts.ToString();//得到總記錄數

    TotalPages=Counts/pagesize;
    if(Counts<pagesize)
     TotalPages=1;
    else
    {
     if(Counts%pagesize!=0)TotalPages++;
    }//計算總頁數

    lblcurrent.Text=cpage.ToString()+"/"+TotalPages;
    
    DataSet ds=new DataSet();
    ds=pg.GetCurrentDataSet("id,title,content","","id","News",1,10,cpage);

    bind(ds);
    Gethl();
    Getddlist();
   }
  }
  private void Getddlist()
  {
   if(TotalPages!=1)
   {
    for(int i=1;i<=TotalPages;i++)
    {
     DropDownList1.Items.Add(new ListItem(i.ToString(),i.ToString()));
    }
   }
   else
   {
    DropDownList1.Items.Add(new ListItem("1","1"));
   }
  }
  private void Gethl()//得到上頁，下頁狀態
  {
   if(lblcurrent.Text=="1")
   {
    hlprev.Enabled=false;
    hlnext.Enabled=false;
   }
   else
   {
    if(cpage==1)
     hlprev.Enabled=false;
    else
     hlprev.Enabled=true;
    if(cpage==Convert.ToInt32(TotalPages))
     hlnext.Enabled=false;
    else
     hlnext.Enabled=true;
   }
   lblcurrent.Text=cpage.ToString()+"/"+TotalPages;
  }
  private void bind(DataSet ds)
  {
   Repeater1.DataSource=ds;
   Repeater1.DataBind();
  }
  #region Web Form設計器產生的程式碼
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 該調用是 ASP.NET Web Form設計器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  ///  設計器支援所需的方法 - 不要使用代碼編輯器
  ///  修改此方法的內容。
  /// </summary>
  private void InitializeComponent()
  {
   this.hlprev.Click += new System.EventHandler(this.hlprev_Click);
   this.hlnext.Click += new System.EventHandler(this.hlnext_Click);
   this.DropDownList1.SelectedIndexChanged += new System.EventHandler(this.DropDownList1_SelectedIndexChanged);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private void hlprev_Click(object sender, System.EventArgs e)
  {
   cpage=cpage-1;
   Class.Pager pg=new Class.Pager();
   DataSet ds=new DataSet();
   ds=pg.GetCurrentDataSet("id,title,content","","id","News",cpage,10,cpage);
   bind(ds);
   Gethl();
   DropDownList1.ClearSelection();
   DropDownList1.Items.FindByValue(cpage.ToString()).Selected=true;
  }

  private void hlnext_Click(object sender, System.EventArgs e)
  {
   cpage=cpage+1;
   Class.Pager pg=new Class.Pager();
   DataSet ds=new DataSet();
   ds=pg.GetCurrentDataSet("id,title,content","","id","News",cpage,10,cpage);
   bind(ds);
   Gethl();
   DropDownList1.ClearSelection();
   DropDownList1.Items.FindByValue(cpage.ToString()).Selected=true;
  }
  private void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
  {
   cpage=Convert.ToInt32(DropDownList1.SelectedValue);
   Class.Pager pg=new Class.Pager();
   DataSet ds=new DataSet();
   ds=pg.GetCurrentDataSet("id,title,content","","id","News",cpage,10,cpage);
   bind(ds);
   Gethl();
  }