数据库通用分页存储过程

USE [你的数据库名称]
GO
/****** Object:  StoredProcedure [dbo].[P_Pager_Select]    Script Date: 04/14/2014 14:40:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[P_Pager_Select] 
@tbname     sysname,             --要分页显示的表名
@FieldKey   nvarchar(1000),      --用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1,              --要显示的页码
@PageSize   int=10,              --每页的大小(记录数)
@FieldShow  nvarchar(1000)='',   --以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder  nvarchar(1000)='',  --以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC用于指定排序顺序
@Where     nvarchar(4000)='', --查询条件
@RecordCount   int=1 OUTPUT ,--总记录数
@PageCount  int=1 OUTPUT           --总页数
AS
SET NOCOUNT ON
--检查对象是否有效
--IF OBJECT_ID(@tbname) IS NULL
--BEGIN
--    RAISERROR(N'对象"%s"不存在',1,16,@tbname)
--    RETURN
--END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTable')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsView')=0
    AND OBJECTPROPERTY(OBJECT_ID(@tbname),N'IsTableFunction')=0
BEGIN
    RAISERROR(N'"%s"不是表、视图或者表值函数',1,16,@tbname)
    RETURN
END

--分页字段检查
IF ISNULL(@FieldKey,N'')=''
BEGIN
    RAISERROR(N'分页处理需要主键（或者惟一键）',1,16)
    RETURN
END

--其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N'')=N'' SET @FieldShow=N'*'
IF ISNULL(@FieldOrder,N'')=N''
    SET @FieldOrder=N''
ELSE
    SET @FieldOrder=N'ORDER BY '+LTRIM(@FieldOrder)
IF ISNULL(@Where,N'')=N''
    SET @Where=N''
ELSE
    SET @Where=N'WHERE ('+@Where+N')'

--如果@PageCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@PageCount赋值)
IF @PageCount IS NULL
BEGIN
    DECLARE @sql nvarchar(4000)
    SET @sql=N'SELECT @PageCount=COUNT(*)'
        +N' FROM '+@tbname
        +N' '+@Where
    EXEC sp_executesql @sql,N'@PageCount int OUTPUT',@RecordCount OUTPUT
    SET @PageCount=(@RecordCount+@PageSize-1)/@PageSize
END
IF @PageCurrent>@PageCount
BEGIN
    SET @PageCurrent=@PageCount
END
IF @PageCount=0
BEGIN
    SET @PageCurrent=1
END
--计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20)
SELECT @TopN=@PageSize,
    @TopN1=@PageCurrent*@PageSize

--第一页直接显示
DECLARE @SQL1 VARCHAR(500)
IF @PageCurrent=1

BEGIN
  EXEC(N'SELECT TOP '+@TopN
        +N' '+@FieldShow
        +N' FROM '+@tbname
        +N' '+@Where
        +N' '+@FieldOrder)

 END
      
ELSE
BEGIN
    --生成主键(惟一键)处理条件
    DECLARE @Where1 nvarchar(4000),@s nvarchar(1000)
    SELECT @Where1=N'',@s=@FieldKey
    WHILE CHARINDEX(N',',@s)>0
        SELECT 
            @Where1=@Where1
                +N' AND a.'+LEFT(@s,CHARINDEX(N',',@s)-1)
                +N'='+LEFT(@s,CHARINDEX(N',',@s)-1)
                ,@s=STUFF(@s,1,CHARINDEX(N',',@s),N'')
    SELECT @Where1=STUFF(@Where1+N' AND a.'+@s+N'='+@s,1,5,N''),
        @TopN=@TopN1-@PageSize

    --执行查询
    declare @filter varchar(100)
    SET @filter=replace(@Where,'WHERE','AND')
     print(N'SET ROWCOUNT '+@TopN1
        +N' SELECT '+@FieldKey
        +N' INTO # FROM '+@tbname
        +N' '+@Where
        +N' '+@FieldOrder
        +N' SET ROWCOUNT '+@TopN
        +N' DELETE FROM #'
        +N' SELECT '+@FieldShow
        +N' FROM '+@tbname
        +N' a WHERE EXISTS(SELECT * FROM # WHERE '+@Where1
        +N')'+@filter+@FieldOrder)
        
    --SET @SQL1=(N'SET ROWCOUNT '+@TopN1
    --    +N' SELECT '+@FieldKey
    --    +N' INTO # FROM '+@tbname
    --    +N' '+@Where
    --    +N' '+@FieldOrder
    --    +N' SET ROWCOUNT '+@TopN
    --    +N' DELETE FROM #'
    --    +N' SELECT '+@FieldShow
    --    +N' FROM '+@tbname
    --    +N' a WHERE EXISTS(SELECT * FROM # WHERE '+@Where1
    --    +N') '+@FieldOrder)
    
    
    
    
    EXEC(N'SET ROWCOUNT '+@TopN1
        +N' SELECT '+@FieldKey
        +N' INTO # FROM '+@tbname
        +N' '+@Where
        +N' '+@FieldOrder
        +N' SET ROWCOUNT '+@TopN
        +N' DELETE FROM #'
        +N' SELECT '+@FieldShow
        +N' FROM '+@tbname
        +N' a WHERE EXISTS(SELECT * FROM # WHERE '+@Where1
        +N') '+@FieldOrder)
        
    --SET @SQL1=(N'SET ROWCOUNT '+@TopN1
    --    +N' SELECT '+@FieldKey
    --    +N' INTO # FROM '+@tbname
    --    +N' '+@Where
    --    +N' '+@FieldOrder
    --    +N' SET ROWCOUNT '+@TopN
    --    +N' DELETE FROM #'
    --    +N' SELECT '+@FieldShow
    --    +N' FROM '+@tbname
    --    +N' a WHERE EXISTS(SELECT * FROM # WHERE '+@Where1
    --    +N') '+@FieldOrder)
   PRINT @SQL1
END

     /// <summary>
        /// 查询操作记录-分页
        /// </summary>
        /// <param name="pageindex">当前页码</param>
        /// <param name="pagesize">每页行数</param>
        /// <param name="recordCount">共多少条数据</param>
        /// <param name="pageCount">供多少页</param>  
        /// <param name="fieldOrder">按什么排序</param>
        /// <param name="where"></param>
        /// <returns></returns>
        public List<Model.SSART.Auction> Select(int pageindex, int pagesize, out int recordCount, out int pageCount, string where, string fieldOrder)
        {
            DbParameter[] prams = {
                DbRead.MakeInParam("@tbname", DbType.String, 100, "Auction"),
                DbRead.MakeInParam("@FieldKey", DbType.String, 100, "AuctionID"),
                DbRead.MakeInParam("@PageSize", DbType.Int32, 4, pagesize),
                DbRead.MakeInParam("@PageCurrent", DbType.Int32, 4, pageindex),
                DbRead.MakeOutParam("@RecordCount", DbType.String, 10000),
                DbRead.MakeOutParam("@PageCount", DbType.String, 10000),
                DbRead.MakeInParam("@FieldOrder", DbType.String, 500, fieldOrder),
                DbRead.MakeInParam("@Where", DbType.String, 4000, @where)
            };
            DataTable dt = DbRead.ExecuteDataSet("P_Pager_Select", CommandType.StoredProcedure, prams).Tables[0];
            recordCount = Convert.ToInt32(prams[4].Value);
            pageCount = Convert.ToInt32(prams[5].Value);
            if (dt != null)
            {
                return (from DataRow row in dt.Rows
                        select new Model.SSART.Auction
                        {
                            AuctionID = row["AuctionID"].ToInt(0),
                            ViewAddress = row["ViewAddress"].ToString(),
                            Turnover = row["Turnover"].ToInt(0),
                            CreatedTime = row["CreatedTime"].ToDateTime(DateTime.Now),
                            Status = row["Status"].ToInt(0),
                            AuHousesId = row["AuHousesId"].ToInt(0),
                            ProvinceId = row["ProvinceId"].ToInt(0),
                            CityId = row["CityId"].ToInt(0),
                            CountyId = row["CountyId"].ToInt(0),
                            Title = row["Title"].ToString(),
                            StartTime = row["StartTime"].ToDateTime(DateTime.Now),
                            EndTime = row["EndTime"].ToDateTime(DateTime.Now),
                            Address = row["Address"].ToString(),
                            ViewStartTime = row["ViewStartTime"].ToDateTime(DateTime.Now),
                            ViewEndTime = row["ViewEndTime"].ToDateTime(DateTime.Now)
                        }).ToList();
            }
            return null;
        }

     /// <summary>
        /// 查询操作记录-分页
        /// </summary>
        /// <param name="pageindex">当前页码</param>
        /// <param name="pagesize">每页行数</param>
        /// <param name="recordCount">共多少条数据</param>
        /// <param name="pageCount">供多少页</param>
        /// <param name="fieldOrder">按什么排序</param>
        /// <param name="where"></param>
        /// <returns></returns>
        public List<Model.SSART.Auction> Select(int pageindex, int pagesize, out int recordCount, out int pageCount, string where, string fieldOrder = "CreatedTime DESC")
        {
            return dal.Select(pageindex, pagesize, out recordCount, out pageCount, where, fieldOrder);
        }