如何创建数据源?

[YuyuanJian]

在VFP中,如何用程序的方法创建数据源?

[-狙击手-]

这是PB中的一段代码，其实思路是一样的，供你参与 ：


思路：

主要是利用PB对注册表操作函数RegistryGet()和RegistrySet()，这两个函数以及其他注册表函数在PB的帮助里都有详细说明。

再就是利用PB的ProfileString()函数读取INI文件中预先定义好的参数。

　

写注册表的源程序：

string ls_sys[],ls_driver[],st_driver,st_path

integer li_rtn

ls_me="新星科技股份有限公司（New Star, Inc.）"

ls_version="2.0"

ls_sys[1]="HKEY_LOCAL_MACHINE\Software\ODBC\ODBCINST.INI\Sybase SQL Anywhere 5.0"

ls_sys[2]="HKEY_CURRENT_USER\Software\"+ls_me+"\仓储管理系统\"+ls_version

ls_sys[3]="HKEY_CURRENT_USER\Software\ODBC\ODBC.INI\ODBC Data Sources"

ls_sys[4]="HKEY_CURRENT_USER\Software\ODBC\ODBC.INI"

li_rtn = RegistryGet(ls_sys[1], "Driver", RegString!, st_driver)

IF li_rtn = -1 THEN

messagebox("错误","未安装Sybase SQL Anywhere 5.0 ！",information!,ok!)

RETURN

END IF

li_rtn = RegistryGet(ls_sys[2], "InstPath", RegString!, st_path)

IF li_rtn = -1 THEN

messagebox("错误","读取安装路径出错 ！",information!,ok!)

RETURN

END IF

string envfile,ls_source[],ls_drivepath,ls_temp

integer i

envfile="regedit.ini"

ls_source[1]="cl"

ls_source[2] =ProfileString(envfile,"INI","AutoStop"," ")

ls_source[3] =ProfileString(envfile,"INI","DatabaseFile"," ")

ls_source[4] =ProfileString(envfile,"INI","DatabaseName"," ")

ls_source[5] =ProfileString(envfile,"INI","Description"," ")

ls_source[6] =ProfileString(envfile,"INI","Driver"," ")

ls_source[7] =ProfileString(envfile,"INI","PWD"," ")

ls_source[8] =ProfileString(envfile,"INI","Start"," ")

ls_source[9] =ProfileString(envfile,"INI","UID"," ")

li_rtn=RegistrySet(ls_sys[3], ls_source[1] , RegString!, "Sybase SQL Anywhere 5.0")

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

ls_sys[4]=ls_sys[4] + "\" + ls_source[1]

li_rtn=RegistrySet(ls_sys[4], "AutoStop" , RegString!, ls_source[2])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "DatabaseFile" , RegString!, st_path+"\"+ls_source[3])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "DatabaseName" , RegString!, ls_source[4])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "Description" , RegString!, ls_source[5])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错?！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "Driver" , RegString!, st_driver)

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "PWD" , RegString!, ls_source[7])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

ls_temp=st_driver

i=pos(ls_temp,"\")

do while i>0

ls_drivepath=ls_drivepath+left(ls_temp,i)

ls_temp=right(ls_temp,len(ls_temp)-i)

i=pos(ls_temp,"\")

loop

li_rtn=RegistrySet(ls_sys[4], "Start" , RegString!, ls_drivepath+ls_source[8])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

li_rtn=RegistrySet(ls_sys[4], "UID" , RegString!, ls_source[9])

IF li_rtn = -1 THEN

messagebox("错误","读取系统文件或写注册表出错 ！",information!,ok!)

RETURN

END IF

regedit.ini文件格式如下：

[INI]

AutoStop=yes

DatabaseFile=Psdemodb.db

DatabaseName=仓储管理系统

Description=cl

Driver=

PWD=sql

Start=dbeng50.exe

UID=dba

备注：

程序中ls_sys[2]变量代表的注册表键值是我通过安装程序制作工具自动生成的，每个人使用的制作安装程序的工具不同，这个键值也许不尽相同。其实用意只是在于取得st_path这个变量，它保存应用程序安装后所在路径，其实也可以用API函数得到，至于使用API函数怎么取得当前程序所在路径就不讲了。

[十月鹰飞]

建议使用ADO对象，可以不用建立数据源的

[流星尔]

请参见本版快的FAQ中的SPT,不需要建立数据院