利用存储过程进行高效分页的例子

高效分页的例子：
后台代码：

        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(!IsPostBack)
{
                ViewState["Page"] = "1";            
                //绑定跳转到第几页下拉列表    
                string SearchContent = " WHERE (Type <> '转帐') AND (Type <> '年费') ";
                DataSet ds = Common.SqlCard.GetNewsRecord(SearchContent,ViewState["Page"].ToString(),"");
                int SumNo = int.Parse(ds.Tables[1].Rows[0][0].ToString());
                ddlNum.Items.Insert(0, "--转到--");
                for (int j =0 ;j< ((SumNo-1)/20 + 1) ;j++)
{
                    ddlNum.Items.Insert(j + 1,"第"+(j + 1).ToString()+"页");
                }

                BindGrid();
            }
        

        }

        private void BindGrid()
{
            string SearchContent = " WHERE (Type <> '转帐') AND (Type <> '年费') ";


            //绑定列表
            DataSet ds = Common.SqlCard.GetNewsRecord(SearchContent,ViewState["Page"].ToString(),"");

            DataTable dtList = ds.Tables[0];
            dtList.Columns.Add("CustomerName");
            for (int i = dtgList.CurrentPageIndex * 20 ; i < dtList.Rows.Count && i < dtgList.CurrentPageIndex * 20 + 20 ; i ++ )
{
                
                //dt.Rows[i]["ShortDate"] = ((DateTime)dt.Rows[i]["Date"]).ToString("yyyy/MM/dd hh:mm tt");
                //通过CustomerID值绑定定点或目标账号
                if(dtList.Rows[i]["CustomerID"].ToString() != "" )
{
                    try
{
                        //获取商家名称[打折消费、不打折消费]
                        dtList.Rows[i]["CustomerName"] = Common.SqlCard.GetCustomerName(dtList.Rows[i]["CustomerID"].ToString());

                    }
                    catch
{
                        
                        dtList.Rows[i]["CustomerName"]="未知数据……";
                    }
                }
            }
                dtgList.DataSource = dtList.DefaultView;
                dtgList.DataBind();


                //移动的效果
                for(int i = 0 ; i < dtgList.Items.Count ; i++)
{
                    dtgList.Items[i].Attributes.Add("onMouseOver","this.style.backgroundColor='#F5F5F5'");
                    dtgList.Items[i].Attributes.Add("onMouseOut","this.style.backgroundColor='#FFFFFF'");
                }

                if(ViewState["Page"].ToString() != "1")
                    lbnFormerPage.Visible = true; else lbnFormerPage.Visible = false;

                //绑定页数
                int SumNo = int.Parse(ds.Tables[1].Rows[0][0].ToString());
                lblSumNo.Text = SumNo.ToString();
                lblSumPage.Text = ((SumNo-1)/20 + 1).ToString();
                if(ViewState["Page"].ToString() != lblSumPage.Text)
                    lbnNextPage.Visible = true; else lbnNextPage.Visible = false;
                lblCurrentPage.Text = ViewState["Page"].ToString();

            }


        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);
        }
        

        /// 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.lbnFormerPage.Click += new System.EventHandler(this.lbnFormerPage_Click);
            this.lbnNextPage.Click += new System.EventHandler(this.lbnNextPage_Click);
            this.ddlNum.SelectedIndexChanged += new System.EventHandler(this.ddlNum_SelectedIndexChanged);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion


        private void lbnFormerPage_Click(object sender, System.EventArgs e)
{
            ViewState["Page"] = int.Parse(ViewState["Page"].ToString()) - 1;
            BindGrid();
        }

        private void lbnNextPage_Click(object sender, System.EventArgs e)
{
            ViewState["Page"] = int.Parse(ViewState["Page"].ToString()) + 1;
            BindGrid();
        }

        private void ddlNum_SelectedIndexChanged(object sender, System.EventArgs e)
{
            //Response.Write("<script>alert('" + ddlNum.SelectedIndex + "')</script>");
            ViewState["Page"] = ddlNum.SelectedIndex;
            BindGrid();
        }

    

数据操作层的代码：

        /// 获得最新消费记录
        /// </summary>
        /// <param name="SearchContent"></param>
        /// <param name="Page"></param>
        /// <param name="Orderby"></param>
        /// <returns></returns>
        public static DataSet GetNewsRecord(string SearchContent,string Page,string Orderby)
{
            SqlParameter[] mySqlParameter = new SqlParameter[7];
            mySqlParameter[0] = new SqlParameter("@PageSize",20);
            mySqlParameter[1] = new SqlParameter("@PageIndex",Page);
            //查询条件
            mySqlParameter[2] = new SqlParameter("@Condition",SearchContent);

            //表名
            mySqlParameter[3] = new SqlParameter("@TheTable","card_Record ");

            //选择的字段
            mySqlParameter[4] = new SqlParameter("@SelectField","CardNo,Date,CustomerID,Consumption,Discount,Type,ScoreGet,ScoreLeft");

            //排序方式
            if(Orderby == "")
                Orderby = "order by [Date] desc";
            mySqlParameter[5] = new SqlParameter("@OrderBy",Orderby);
            mySqlParameter[6] = new SqlParameter("@TableID","ID");

            return ExecuteStoreDataset("card_高效分页",mySqlParameter);
        }

        /// 执行存储过程,返回DataSet数据集
        /// </summary>
        /// <param name="StoreName"></param>
        /// <param name="par"></param>
        /// <returns></returns>
        protected static DataSet ExecuteStoreDataset(string StoreName,SqlParameter[] par)
{
            SqlConnection conn = CreateConnection();
            
            SqlDataAdapter myDataAdapter = new SqlDataAdapter(StoreName,conn);
            myDataAdapter.SelectCommand.CommandType = CommandType.StoredProcedure;
            for(int i=0;i<par.Length;i++)
{
                myDataAdapter.SelectCommand.Parameters.Add(par[i]);
            }
            DataSet ds = new DataSet();
            myDataAdapter.Fill(ds);
            return ds;
        }

存储过程：

CREATE PROCEDURE [dbo].[card_高效分页] 
(
    @PageSize int,                                     --每页记录
    @PageIndex int,                                   --当前页数,1开始
    @Condition varchar(8000),                   --查询条件,包括and,where,必须有一个条件如where 2>1
    @TheTable varchar(8000),                    --表名
    @SelectField varchar(8000),                --要选择的字段
    @OrderBy varchar (8000),                    --OrderBy字句,包括order
    @TableID varchar (8000)                        --table主键
)
AS
begin
declare @Sql varchar(8000)

--返回记录
set @Sql='select top ' + cast(@PageSize as varchar(10)) + ' ' + @SelectField + ' from ' + @TheTable + ' ' + @Condition + ' and '
    + @TableID +' not in (select top ' + cast((@PageSize*(@PageIndex-1)) as varchar(10))+' ' +@TableID+'  from ' + @TheTable + ' ' + @Condition
    + ' ' + @OrderBy +') ' + @OrderBy
exec(@sql)

--返回总数
set @Sql='select count(' + @TableID + ') from ' + @TheTable +' ' + @Condition
exec(@sql)
end
GO

前台代码（部分）：

                                            <td align="right">
                                                <TABLE height="23" cellSpacing="0" cellPadding="0" border="0">
                                                    <tr>
                                                        <td width="3"><IMG src="../images/SelectBg.gif"></td>
                                                        <td vAlign="middle" background="../images/SelectBorder.gif" bgColor="white"><span style="LEFT: 3px; OVERFLOW: hidden; POSITION: relative; HEIGHT: 17px"><asp:dropdownlist id="ddlNum" Runat="server" AutoPostBack="True" CssClass="Border"></asp:dropdownlist></span></td>
                                                        <td width="3"><IMG style="FILTER: fliph" src="../images/SelectBg.gif"></td>
                                                    </tr>
                                                </TABLE>
                                            </td>