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Reading a Configuration File


This code shows how to
'read a configuration file and use
'the key-value pair. The configuration
'file must be in "key=value" format.
'(Similar to a java property file)

Original Author: Subodh Dash

Inputs

configuration file name with full path

Assumptions

'The code must be modified to
'use the actual key variables
'from your configuration file.
'The code uses a sample of few keys.
'You must customize it to your needs.
'The property file may also have comments.
'The comment lines must start with #.

API Declarations

Free to use / free to distribute

Code

'Let the configuration file be in
'c:myprojectmyconfile.extension
'And the contents of the file is as follows
#Hash lines are comment lines
#You may add as many hash lines as you want
icsDrive=C
icsProjectDir=ICS
icsMinDiskSpace=5000
icsMaxDiskSpace=100000
icsMailApplication=Outlook.Application
icsEMailTo=mymail@yourhost.com
#End of the configuration file
'
'
'
Option Explicit
DIM FSO
SET FSO = CreateObject ("Scripting.FileSystemObject")
'Declare the variables to be used from the property file
DIM icsDrive
DIM icsProjectDir
DIM icsMinDiskSpace
DIM icsMaxDiskSpace
DIM icsMailApplication
DIM icsEMailTo
Main
Sub Main
CALL SetConfigFromFile("c:myprojectmyconfile.extension")
msgbox icsDrive
msgbox icsProjectDir
msgbox icsMinDiskSpace
msgbox icsMaxDiskSpace
msgbox icsMailApplication
msgbox icsEMailTo
End sub
'***Read Configuration File***
Sub SetConfigFromFile(fileName)
DIM strConfigLine
DIM fConFile
DIM EqPos, strLen, varName, varVal
SET fConFile = fso.OpenTextFile(fileName)
WHILE NOT fConFile.AtEndOfStream
strConfigLine = fConFile.ReadLine
strConfigLine = TRIM(strConfigLine)
IF (INSTR(1,strConfigLine,"#",1) <> 1 AND LEN(strConfigLine) <> 0) THEN
EqPos = INSTR(1,strConfigLine,"=",1)
strLen = LEN(strConfigLine)
varName = LCASE(TRIM(MID(strConfigLine, 1, EqPos - 1)))
varVal = TRIM(MID(strConfigLine, EqPos + 1, strLen - EqPos))
SELECT CASE varName
'ADD EACH OCCURRENCE OF THE CONFIGURATION FILE VARIABLES(KEYS)
CASE LCASE("icsDrive")
IF varVal <> "" THEN icsDrive = varVal
CASE LCASE("icsProjectDir")
IF varVal <> "" THEN icsProjectDir = varVal
CASE LCASE("icsMinDiskSpace")
IF varVal <> "" THEN icsMinDiskSpace = varVal
CASE LCASE("icsMaxDiskSpace")
IF varVal <> "" THEN icsMaxDiskSpace = varVal
CASE LCASE("icsMailApplication")
IF varVal <> "" THEN icsMailApplication = varVal
CASE LCASE("icsEMailTo")
IF varVal <> "" THEN icsEMailTo = varVal
END SELECT
END IF
WEND
fConFile.Close
End Sub

About this post

Posted: 2002-06-01
By: ArchiveBot
Viewed: 100 times

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