搜索与动态显示字段
搜索功能,并动态显示用户选择的货位,可以通过下面的存储过程去实现。aspx页面,即放一个Gridview即可。
本例程,可以学会如何使用临时表,循环表,和字符串连接,动态SQL语句与执行。
代码
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[usp_ItemGeneral_Store_Search]
(
@CargoSpaceCollection NVARCHAR(100),--货位集合
@CompareOperator NVARCHAR(100) --条件
)
AS
BEGIN
--创建临时表,放存货位,以便做循环记录动作
IF OBJECT_ID('#TempCargoSpace') IS NOT NULL
DROP TABLE #TempCargoSpace
CREATE TABLE #TempCargoSpace
(
ID INT IDENTITY(1,1),
CargoSpaceId SMALLINT,
CargoSpaceName NVARCHAR(50)
)
END
--宣告变量
--下面有两个变量,宣告之后,马上赋值为'',如果不这样实现,那在下面字符串连接时,NULL与任何字符串连接之后,还是NULL
DECLARE @N INT,@ROWS INT,@CargoSpaceField NVARCHAR(100) = '',@CargoSpaceField1 NVARCHAR(100) = '',@CompareCondition NVARCHAR(500)
SET @N = 1
--如果用户有选择货位
IF (LEN(@CargoSpaceCollection) > 0)
--从货位表中搜索出货位主健,名称存入临进表中。
EXECUTE('INSERT INTO #TempCargoSpace([CargoSpaceId],[CargoSpaceName]) SELECT [CargoSpaceId],[CargoSpaceName] FROM [dbo].[CargoSpace] WHERE [CargoSpaceId] IN (' + @CargoSpaceCollection + ')')
ELSE
--如果没有选择货位的话,把货位表中所有记录插入临时表中
INSERT INTO #TempCargoSpace([CargoSpaceId],[CargoSpaceName]) SELECT [CargoSpaceId],[CargoSpaceName] FROM [dbo].[CargoSpace]
--记录发生的记录笔数
SET @ROWS = @@ROWCOUNT
--开始循环临时表
WHILE @N <= @ROWS
BEGIN
DECLARE @CargoSpaceId NVARCHAR(30),@CargoSpaceName NVARCHAR(50)
--找出每笔记录的货位主键与货位名称
SELECT @CargoSpaceId = [CargoSpaceId],@CargoSpaceName = [CargoSpaceName] FROM #TempCargoSpace WHERE [ID] = @N
--在aspx网页中将会显示这些组合成字段,如:,[1] AS [默认货位],[2] AS [CR1],[3] AS [SRC]....
SET @CargoSpaceField = @CargoSpaceField + ',[' + @CargoSpaceId + '] AS [' + @CargoSpaceName + ']'
--下面句,组成条件所需字段,如:,[1],[2],[3]....
SET @CargoSpaceField1 = @CargoSpaceField1 + ',[' + @CargoSpaceId +']'
SET @N = @N + 1
END --临时表循环结束
IF (LEN(@CargoSpaceField) > 0)
--截除前面的“,”
SET @CargoSpaceField = SUBSTRING(@CargoSpaceField,2,LEN(@CargoSpaceField))
IF (LEN(@CargoSpaceField1) > 0)
--截除前面的“,”
SET @CargoSpaceField1 = SUBSTRING(@CargoSpaceField1,2,LEN(@CargoSpaceField1))
--如果用户有选择条件话,条件如:<> 10
IF (LEN(@CompareOperator) > 0)
--每个字段套用条件,结果如:[1] <> 10 OR [2] <> 10 OR [3] <> 10
SET @Comparecondition = REPLACE(REPLACE(@CargoSpaceField1,',',' OR '),']',']' + @CompareOperator)
BEGIN
DECLARE @sql nvarchar(4000) = 'SELECT [ItemCode] AS [物料编码],[ItemGeneralName] AS [物料说明],[UnitMeasureName] AS [单位],' + @CargoSpaceField + ' FROM [dbo].[udf_ItemGeneralStock]()'
IF (LEN(@CompareOperator) = 0)
SELECT @sql = @sql + ' ORDER BY [ItemCode]'
ELSE IF (LEN(@CompareOperator) > 0)
SELECT @sql = @sql + ' WHERE ' + @Comparecondition + ' ORDER BY [ItemCode]'
EXECUTE sp_executesql @sql
END
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[usp_ItemGeneral_Store_Search]
(
@CargoSpaceCollection NVARCHAR(100),--货位集合
@CompareOperator NVARCHAR(100) --条件
)
AS
BEGIN
--创建临时表,放存货位,以便做循环记录动作
IF OBJECT_ID('#TempCargoSpace') IS NOT NULL
DROP TABLE #TempCargoSpace
CREATE TABLE #TempCargoSpace
(
ID INT IDENTITY(1,1),
CargoSpaceId SMALLINT,
CargoSpaceName NVARCHAR(50)
)
END
--宣告变量
--下面有两个变量,宣告之后,马上赋值为'',如果不这样实现,那在下面字符串连接时,NULL与任何字符串连接之后,还是NULL
DECLARE @N INT,@ROWS INT,@CargoSpaceField NVARCHAR(100) = '',@CargoSpaceField1 NVARCHAR(100) = '',@CompareCondition NVARCHAR(500)
SET @N = 1
--如果用户有选择货位
IF (LEN(@CargoSpaceCollection) > 0)
--从货位表中搜索出货位主健,名称存入临进表中。
EXECUTE('INSERT INTO #TempCargoSpace([CargoSpaceId],[CargoSpaceName]) SELECT [CargoSpaceId],[CargoSpaceName] FROM [dbo].[CargoSpace] WHERE [CargoSpaceId] IN (' + @CargoSpaceCollection + ')')
ELSE
--如果没有选择货位的话,把货位表中所有记录插入临时表中
INSERT INTO #TempCargoSpace([CargoSpaceId],[CargoSpaceName]) SELECT [CargoSpaceId],[CargoSpaceName] FROM [dbo].[CargoSpace]
--记录发生的记录笔数
SET @ROWS = @@ROWCOUNT
--开始循环临时表
WHILE @N <= @ROWS
BEGIN
DECLARE @CargoSpaceId NVARCHAR(30),@CargoSpaceName NVARCHAR(50)
--找出每笔记录的货位主键与货位名称
SELECT @CargoSpaceId = [CargoSpaceId],@CargoSpaceName = [CargoSpaceName] FROM #TempCargoSpace WHERE [ID] = @N
--在aspx网页中将会显示这些组合成字段,如:,[1] AS [默认货位],[2] AS [CR1],[3] AS [SRC]....
SET @CargoSpaceField = @CargoSpaceField + ',[' + @CargoSpaceId + '] AS [' + @CargoSpaceName + ']'
--下面句,组成条件所需字段,如:,[1],[2],[3]....
SET @CargoSpaceField1 = @CargoSpaceField1 + ',[' + @CargoSpaceId +']'
SET @N = @N + 1
END --临时表循环结束
IF (LEN(@CargoSpaceField) > 0)
--截除前面的“,”
SET @CargoSpaceField = SUBSTRING(@CargoSpaceField,2,LEN(@CargoSpaceField))
IF (LEN(@CargoSpaceField1) > 0)
--截除前面的“,”
SET @CargoSpaceField1 = SUBSTRING(@CargoSpaceField1,2,LEN(@CargoSpaceField1))
--如果用户有选择条件话,条件如:<> 10
IF (LEN(@CompareOperator) > 0)
--每个字段套用条件,结果如:[1] <> 10 OR [2] <> 10 OR [3] <> 10
SET @Comparecondition = REPLACE(REPLACE(@CargoSpaceField1,',',' OR '),']',']' + @CompareOperator)
BEGIN
DECLARE @sql nvarchar(4000) = 'SELECT [ItemCode] AS [物料编码],[ItemGeneralName] AS [物料说明],[UnitMeasureName] AS [单位],' + @CargoSpaceField + ' FROM [dbo].[udf_ItemGeneralStock]()'
IF (LEN(@CompareOperator) = 0)
SELECT @sql = @sql + ' ORDER BY [ItemCode]'
ELSE IF (LEN(@CompareOperator) > 0)
SELECT @sql = @sql + ' WHERE ' + @Comparecondition + ' ORDER BY [ItemCode]'
EXECUTE sp_executesql @sql
END