分页存储过程

今天遇到要分页处理批量数据，要自己编写存储过程，在网上看上如下作者写得很好，故借鉴，结合自身要求并改之，

引用地址：http://51cndo.blog.51cto.com/491222/102320

内容如下：

参数：分页大小，第几页，需要得到的字段 ，需要查询的表 ， 查询条件，排序的字段名，排序的类型，主键名称

/*通用分页存储过程*/
USE HotelManagementSystem
GO
IF EXISTS(SELECT * FROM sys.objects WHERE NAME='cndoup_GetPageOfRecords')
  DROP PROCEDURE cndoup_GetPageOfRecords
GO
--创建存储过程
CREATE PROCEDURE cndoup_GetPageOfRecords
  @pageSize int = 20,                                                --分页大小
  @currentPage int ,                                                 --第几页
  @columns varchar(1000) = '*',                            --需要得到的字段
  @tableName varchar(100),                                     --需要查询的表    
  @condition varchar(1000) = '',                         --查询条件, 不用加where关键字
  @ascColumn varchar(100) = '',                            --排序的字段名 (即 order by column asc/desc)
  @bitOrderType bit = 0,                                         --排序的类型 (0为升序,1为降序)
  @pkColumn varchar(50) = ''                                 --主键名称

AS
BEGIN                                                                                    --存储过程开始
  DECLARE @strTemp varchar(300)
  DECLARE @strSql varchar(5000)                            --该存储过程最后执行的语句
  DECLARE @strOrderType varchar(1000)                --排序类型语句 (order by column asc或者order by column desc)

  BEGIN
    IF @bitOrderType = 1                --降序
      BEGIN
        SET @strOrderType = ' ORDER BY '+@ascColumn+' DESC'
        SET @strTemp = '<(SELECT min'
      END
    ELSE                  --升序
      BEGIN
        SET @strOrderType = ' ORDER BY '+@ascColumn+' ASC'
        SET @strTemp = '>(SELECT max'
      END

    IF @currentPage = 1            --第一页
      BEGIN
        IF @condition != ''
          SET @strSql = 'SELECT TOP '+STR(@pageSize)+' '+@columns+' FROM '+@tableName+
            ' WHERE '+@condition+@strOrderType
        ELSE
          SET @strSql = 'SELECT TOP '+STR(@pageSize)+' '+@columns+' FROM '+@tableName+@strOrderType
      END

    ELSE                  -- 其他页
      BEGIN
        IF @condition !=''
          SET @strSql = 'SELECT TOP '+STR(@pageSize)+' '+@columns+' FROM '+@tableName+
          ' WHERE '+@condition+' AND '+@pkColumn+@strTemp+'('+@pkColumn+')'+' FROM (SELECT TOP '+STR((@currentPage-1)*@pageSize)+
          ' '+@pkColumn+' FROM '+@tableName'where'+@condition+@strOrderType+') AS TabTemp)'+@strOrderType
        ELSE
          SET @strSql = 'SELECT TOP '+STR(@pageSize)+' '+@columns+' FROM '+@tableName+
          ' WHERE '+@pkColumn+@strTemp+'('+@pkColumn+')'+' FROM (SELECT TOP '+STR((@currentPage-1)*@pageSize)+' '+@pkColumn+
          ' FROM '+@tableName+@strOrderType+') AS TabTemp)'+@strOrderType
      END

  END
  EXEC (@strSql)
END  

  --存储过程结束

 

结合自身实际，借鉴上位作者编码的存储过程如下：

******************************************************************
CREATE PROCEDURE [dbo].[UP_GetRecordByPage]
    @tblName      varchar(255),       -- 表名
    @fldName      varchar(255),       -- 主键字段名
    @PageSize     int = 10,           -- 页尺寸
    @PageIndex    int = 1,            -- 页码
    @IsReCount    bit = 0,            -- 返回记录总数, 非 0 值则返回
    @OrderType    bit = 0,            -- 设置排序类型, 非 0 值则降序
    @strWhere     varchar(1000) = ''  -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL   varchar(6000)       -- 主语句
declare @strTmp   varchar(300)        -- 临时变量
declare @strOrder varchar(400)        -- 排序类型
if @OrderType != 0
begin
    set @strTmp = '<(select min'
    set @strOrder = ' order by [' + @fldName +'] desc'
end
else
begin
    set @strTmp = '>(select max'
    set @strOrder = ' order by [' + @fldName +'] asc'
end
set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
    + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['
    + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['
    + @fldName + '] from [' + @tblName + ']' + @strOrder + ') as tblTmp)'
    + @strOrder
if @strWhere != ''
    set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
        + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['
        + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['
        + @fldName + '] from [' + @tblName + '] where ' + @strWhere + ' '
        + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
if @PageIndex = 1
begin
    set @strTmp =''
    if @strWhere != ''
        set @strTmp = ' where ' + @strWhere
    set @strSQL = 'select top ' + str(@PageSize) + ' * from ['
        + @tblName + ']' + @strTmp + ' ' + @strOrder
end
if @IsReCount != 0
begin
         set @strSQL = 'select count(*) as Total from [' + @tblName + ']'
     if @strWhere != ''
         set @strSQL = 'select count(*) as Total from [' + @tblName + ']'+' where ' + @strWhere
end
exec (@strSQL)

调用：

     public DataSet GetList(int PageSize, int PageIndex, string strWhere)
        {
            SqlParameter[] parameters = {
     new SqlParameter("@tblName", SqlDbType.VarChar, 255),
     new SqlParameter("@fldName", SqlDbType.VarChar, 255),
     new SqlParameter("@PageSize", SqlDbType.Int),
     new SqlParameter("@PageIndex", SqlDbType.Int),
     new SqlParameter("@IsReCount", SqlDbType.Bit),
     new SqlParameter("@OrderType", SqlDbType.Bit),
     new SqlParameter("@strWhere", SqlDbType.VarChar,1000),
     };
            parameters[0].Value = "Product";
            parameters[1].Value = "ProductID";
            parameters[2].Value = PageSize;
            parameters[3].Value = PageIndex;
            parameters[4].Value = 0;
            parameters[5].Value = 0;
            parameters[6].Value = strWhere;
            return DbHelperSQL.RunProcedure("UP_GetRecordByPage", parameters, "ds");
        }