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通过SQL Server对上传文件内容进行查询_MySQL

Jun 01, 2016 pm 01:51 PM
windows upload files Inquire

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  由于工作需要,需要对上传的文件内容进行查询。通过MSDN了解到Windows索引服务可以实现对文件的全文检索,并可以通过SQL Server进行查询。本文将两者结合后实现对上传文件的全文检索。
 

方案描述:

 

1.改变文件存储时的文件名

 

2.配置索引服务器,并将索引服务器与MS SQL Server关联。

 

3.修改SQL语句,将进行全文查询语句的内容加入查询条件中

 

文件的存储方式:

 

为了方便存储以及方便索引,我们将上传的文件存储到一个目录里面,为了保证上传的文件名不重复,采用GUID作为文件名,并且通过这个GUID于数据库记录相关联。同时,文件的后缀还保持原始文件的后缀,让索引服务能够识别该文档。

 

配置索引服务

 

进入计算机管理(Computer Management)程序(右键”我的电脑”->”管理”),并找到索引服务(Index Service)

 

配置索引服务的功能

 

(1)右键选择索引服务弹出一个菜单

 

(2)选择New->Catalog(新建一个编录)

 

设置新增加的编录

 

(1)输入编录的名字(这个名字需要与数据库进行关联,要注意命名,这里假设DCSII

 

(2)点Browse进入选择索引服务运行目录窗体

 

(3)选择前面创建的索引运行目录(任意地方)

 

(4)点确定完成本次操作

 

在编录创建号以后,需要给编录增加目录

 

(1)右键选择刚刚创建的编录

 

(2)选择New->Directory(新建目录)

 

新建索引目录

 

(1)点击Browse进入目录选择页面

 

(2)选择要进行全文检索文件的目录

 

(3)确定完成本次操作

 

完成创建后启动索引服务

 

(1)启动索引服务

 

(2)索引服务启动成功后索引编录的信息,可以看到编录信息就表示服务已经启动成功。

 

将索引服务和SQL数据库关联:

 

在SQL 查询分析器(SQL Query Analyer)里执行下面的存储过程

 

EXEC sp_addlinkedserver Dcs, -- 连接服务器的名字,到后面查询的时候要用到

 

'Index Server',

 

'MSIDXS',

 

'DCSII' -- 索引服务里新建的编录名字

 

 

索引服务的性能调整方法1

 

(1)右键选择索引服务

 

(2)选择 All Tasks-> Tune Perrformance

 

(3)选择用户自定义

 

(4)点击Customize进入性能调整窗体

 

(5)将Index和Querying的属性移动到最右边

 

(6)点确定完成操作

 

性能调整方法2

 

如果服务器不需要对整个系统的文件进行索引,可以停止或者删除System编录。

 

MS SQL对索引服务器的调用

 

1.通过sql语句查询连接服务器的内容

 

SELECT Q.*

 

FROM OpenQuery(dcs, --连接服务器名字

 

'SELECT FileName, Size, DocAuthor, path --在连接服务器里的sql语句

 

FROM SCOPE()

 

WHERE CONTAINS(''番号 and abc'') '

 

) AS Q

 

2.因为SQL语句不支持动态输入的字符串,因此查询字符串只好在C#代码里来进行拼接

 

其它解决方法:

在SQL Server 2000数据库里按全文搜索功能,用image字段存储文件内容,并新增一个字段存放文件类型,然后在通过企业管理器新建全文索引项的时候将这两个字段匹

 

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