.NET海量分页数据存储过程二

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KevinCCW 2011-05-09 14:10:27

文章标签 职场数据存储过程休闲海量分页 文章分类 .Net 后端开发

存储过程2

CREATE PROCEDURE [dbo].[GetRecordFromPage]
@SelectList VARCHAR(2000), --欲选择字段列表
@TableSource VARCHAR(100), --表名或视图表
@SearchCondition VARCHAR(2000), --查询条件
@OrderExpression VARCHAR(1000), --排序表达式
@PageIndex INT = 1, --页号,从0开始
@PageSize INT = 10 --页尺寸
AS
BEGIN
IF @SelectList IS NULL OR LTRIM(RTRIM(@SelectList)) = ''
BEGIN
SET @SelectList = '*'
END
PRINT @SelectList
SET @SearchCondition = ISNULL(@SearchCondition,'')
SET @SearchCondition = LTRIM(RTRIM(@SearchCondition))
IF @SearchCondition <> ''
BEGIN
IF UPPER(SUBSTRING(@SearchCondition,1,5)) <> 'WHERE'
BEGIN
SET @SearchCondition = 'WHERE ' + @SearchCondition
END
END
PRINT @SearchCondition
SET @OrderExpression = ISNULL(@OrderExpression,'')
SET @OrderExpression = LTRIM(RTRIM(@OrderExpression))
IF @OrderExpression <> ''
BEGIN
IF UPPER(SUBSTRING(@OrderExpression,1,5)) <> 'WHERE'
BEGIN
SET @OrderExpression = 'ORDER BY ' + @OrderExpression
END
END
PRINT @OrderExpression
IF @PageIndex IS NULL OR @PageIndex < 1
BEGIN
SET @PageIndex = 1
END
PRINT @PageIndex
IF @PageSize IS NULL OR @PageSize < 1
BEGIN
SET @PageSize = 10
END
PRINT @PageSize
DECLARE @SqlQuery VARCHAR(4000)
SET @SqlQuery='SELECT '+@SelectList+',RowNumber
FROM
(SELECT ' + @SelectList + ',ROW_NUMBER() OVER( '+ @OrderExpression +') AS RowNumber
FROM '+@TableSource+' '+ @SearchCondition +') AS RowNumberTableSource
WHERE RowNumber BETWEEN ' + CAST(((@PageIndex - 1)* @PageSize+1) AS VARCHAR)
+ ' AND ' +
CAST((@PageIndex * @PageSize) AS VARCHAR)
-- ORDER BY ' + @OrderExpression
PRINT @SqlQuery
SET NOCOUNT ON
EXECUTE(@SqlQuery)
SET NOCOUNT OFF
RETURN @@RowCount
END