SQL语句操作文件

-----先开启命令
exec sp_configure 'show advanced options', 1;
reconfigure;
exec sp_configure 'xp_cmdshell', 1; reconfigure;

-----1.判断文件是否存在
CREATE TABLE #tmp ([File Exists] BIT, [File is a Directory] BIT, [Parent Directory Exists] BIT)
go
INSERT INTO #tmp ([File Exists], [File is a Directory], [Parent Directory Exists])
EXEC master.dbo.xp_fileexist 'D:\Image\logo.jpg'
go
SELECT * FROM #tmp
go
DROP TABLE #tmp
go
--- File Exists
--- 1(文件存在)0(文件不存在)
--- File is Deirectory
--- 1(文件夹存在)0(文件夹不存在)
--- Parent Directory Exists
---1(根目录存在)0(根目录不存在)

-----2.删除多余的图片文件
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Use GCN_B2C
go
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
Alter Proc sp_FileIsExists
AS
begin
DECLARE @Id int
DECLARE @CardImg nvarchar(1000)
DECLARE @RegNoImg nvarchar(1000)
DECLARE @OrgNoImg nvarchar(1000)
DECLARE @TaxNoImg nvarchar(1000)
DECLARE @BankImg nvarchar(1000)
DECLARE @flag int
DECLARE @ImgName nvarchar(1000)
DECLARE @ImgPath nvarchar(1000)
Set @flag=1
CREATE TABLE #tmpImg (
Id int IDENTITY(1,1) NOT NULL,
subdirectory nvarchar(2000), --目录或者文件名
depth int, --目录层次
isfile bit default 0 --文件标志,1代表文件
)
--将文件夹下所有图片读取并保存在临时表
INSERT #tmpImg exec master ..xp_dirtree 'D:\B2CJob\TestShow\WebSite\Resource\CompanyImg\',1,1
INSERT #tmpImg exec master ..xp_dirtree 'D:\B2CJob\TestShow\WebSite\Resource\CardImg\',1,1
--对比文件夹下和数据库中的数据是否存在，不存在的删除该图片文件
while Exists (select Id from #tmpImg)
begin
select top 1 @Id=Id,@ImgName=subdirectory from #tmpImg

select @flag=COUNT(Id) from jrCustomer where CardImg=@CardImg Or
RegNoImg=@ImgName Or OrgNoImg=@ImgName Or TaxNoImg=@ImgName Or
BankImg=@ImgName

if @flag=0
begin
Set @ImgPath='Del D:\B2CJob\TestShow\WebSite\Resource\CompanyImg\'+@ImgName

Exec master..xp_cmdshell @ImgPath,no_output

Set @ImgPath='Del D:\B2CJob\TestShow\WebSite\Resource\CardImg\'+@ImgName
Exec master..xp_cmdshell @ImgPath,no_output

end

delete from #tmpImg where Id=@Id

end
end
SET ANSI_NULLS OFF
GO
SET QUOTED_IDENTIFIER OFF
GO
--exec sp_FileIsExists
--exec master.dbo.xp_cmdshell 'del c:\a.txt'
--select * from jrCustomer where DATEDIFF(DAY,Modi_Date,GETDATE())>1
--exec master.dbo.xp_delete_file 0 ,@ImgPath,'xiaopan',@DelDate

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------