Repeater百万级数据分页

第一种方法是网络上流行的处理方式 using System; using System.Data; using System.Data.SqlClient; namespace Pagination.Class { /// <summary> /// Pager 的摘要说明。 /// </summary> public class Pager { public Pager() { // // TODO: 在此处添加构造函数逻辑 // } /// <param name="fieldlist"></param>字段列表，如id,title,content /// <param name="condition"></param>条件，如id<100 /// <param name="pkey"></param>主键，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>每页大小 /// <param name="cpage"></param>当前页码 public DataSet GetCurrentDataSet(string fieldlist,string condition,string pkey,string tablename,int sort,int pagesize,int cpage)//得到当前页记录 { 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)//得到总记录数 { 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); } } } 这里可以输出总记录数和当前页面的dataset。 针对此通用分页类的调用实例 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 建立生成数据的存储过程 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 ('百万级数据分页测试','Test by 逐日★风') end set nocount off GO 3 生成数据 addnews 2000000 4 建立Aspx文件 <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="宋体">共</FONT> <asp:Label id="lblcount" runat="server"></asp:Label><FONT face="宋体">条记录，当前 <asp:Label id="lblcurrent" runat="server"></asp:Label>页 <asp:LinkButton id="hlprev" runat="server">上页</asp:LinkButton> <asp:LinkButton id="hlnext" runat="server">下页</asp:LinkButton> <asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True"></asp:DropDownList></FONT></div> 5 Cs文件 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) { // 在此处放置用户代码以初始化页面 if(!this.IsPostBack) { cpage=1; Class.Pager pg=new Class.Pager(); int Counts=pg.GetCounts("id","News",""); lblcount.Text=Counts.ToString();//得到总记录数 TotalPages=Counts/pagesize; if(Counts<pagesize) TotalPages=1; else { if(Counts%pagesize!=0)TotalPages++; }//计算总页数 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()//得到上页，下页状态 { 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 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器 /// 修改此方法的内容。 /// </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(); } 其实重要的是要返回指定页码的的相关数据 没次点击都是重新加载数据 存储过程如下 @OrderField varchar(255), --排序的字段名 @PageSize int, --页尺寸 @PageIndex int, --页码 @OrderType bit, --排序类型,1是升序,0是降序 @strWhere varchar(1500), --查询条件 @Total int output --返回总记录数 as declare @strSql varchar(5000) --主语句 declare @strOrder varchar(200) --排序 declare @strSqlCount nvarchar(500)--查询记录总数主语句 declare @strtemp varchar(50) --排序附加语句 --------------排序-----------------1是降序,0未升序 if @OrderType !=0 begin set @strtemp= '>(select max(' set @strOrder='order by ' + @OrderField + ' asc ' end else begin set @strtemp= '<(select min(' set @strOrder='order by '+ @OrderField + ' desc' end --------------总记录数--------------- if @strWhere !='' begin set @strSqlCount='Select @TotalCout=count(*) from ' + @tbName + 'where '+ @strWhere end else begin set @strSqlCount='Select @TotalCout=count(*) from ' + @tbName end --------------如果是第一页------------ if @PageIndex =1 begin if @strWhere !='' begin set @strSql = 'Select top' +str(@PageSize)+ ' ' + @tbFields + ' from '+ @tbName +' where ' + @strWhere + ' ' + @strOrder end else begin set @strSql = 'Select top' +str(@PageSize)+ ' ' + @tbFields + ' from '+ @tbName + ' ' + @strOrder end end else begin if @strWhere !='' begin set @strSql='Select top ' +str(@PageSize) + ' ' + @tbFields +' from ' + @tbName + ' where '+@OrderField +' ' + @strtemp+ ' ' +@OrderField+ ') from (select top' +str((@PageIndex-1)*@PageSize) + ' '+@OrderField +' from '+@tbName + @strWhere+ ' '+ @strOrder +') as tb)'+ @strOrder end else begin set @strSql='Select top ' + str(@PageSize) + ' ' + @tbFields +' from ' + @tbName + ' where '+@OrderField + ' ' + @strtemp+ ' ' +@OrderField+ ') from (select top' +str((@PageIndex-1)*@PageSize) + ' '+@OrderField +' from '+@tbName + ' '+ @strOrder +') as tb)'+ @strOrder end end exec sp_executesql @strSqlCount,N'@TotalCout int output',@Total output exec(@strSql) GO 增加一方法 public DataSet GetCurrentDataSet2(string tbName, string tbFields, string OrderField, int PageSize, int PageIndex, bool OrderType) { SqlParameter[] parameters = new SqlParameter[8]; parameters[0] = new SqlParameter("@tbName", SqlDbType.NVarChar,255); parameters[1] = new SqlParameter("@tbFields", SqlDbType.NVarChar, 1000); parameters[2] =new SqlParameter("@OrderField", SqlDbType.NVarChar,1000 ); parameters[3] =new SqlParameter("@PageSize", SqlDbType.Int); parameters[4] =new SqlParameter("@PageIndex", SqlDbType.Int); parameters[5]=new SqlParameter("@OrderType", SqlDbType.Bit); parameters[6] =new SqlParameter("@strWhere", SqlDbType.VarChar,1000); parameters[7]=new SqlParameter("@Total", SqlDbType.Int); parameters[0].Value = tbName; parameters[1].Value = tbFields; parameters[2].Value = OrderField; parameters[3].Value = PageSize; parameters[4].Value = PageIndex; parameters[5].Value = 1; parameters[6].Value = ""; parameters[7].Value = 0; DataAccess.DABaseAccess db = new DABaseAccess(); return db.RunprocToDataSet("SqlDataPaging", parameters); //DbHelperSQL.RunProcedure("SqlDataPaging", parameters, "ds"); } 都没有问题。问题是数据到两百万的时候 分页就不触发了。但存储过程是OK的