ARCHIVE: TIPS & TRICKS
Testing application variables
Jim Lewis
08.15.2000
Rating: -3.75- (out of 5)
Testing Application variables
Reader, Jim Lewis of Fairfield, California, USA, submitted this week's
tip. Jim uses a lot of ADO connections in his Active Server Pages
development to make things more user friendly, and of course to create
dynamic data pages.
Unfortunately, Jim finds that NT web-hosting servers aren't always as
reliable as he would like them to be, and the Application connection
variables in his global.asa file sometimes "evaporate". Since he can't
check every site every day, he's found it useful to include a short
test to see if the Application variables are valid, and reset them if
not.
At the top of his index.asp page, Jim uses an include file
"conn_test.inc" which looks something like this:
<% language="vbscript" RUNAT=SERVER %>
<%
If Application("myConn_ConnectionString") = "" Then 'run if
ConnectionString has been lost
Application.Lock 'Lock App while we reset
Application("myConn_ConnectionString") = "DBQ={appropriate
connection string}
Application("myConn_ConnectionTimeout") = 15
Applic
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ation("myConn_CommandTimeout") = 30
Application("myConn_CursorLocation") = 3 'use client side cursor
Application("myConn_RuntimeUserName") = "admin" 'true for most MS
Access databases
Application.Unlock
End If
%>
This assures Jim that when a visitor accesses the site, it will work
like it should. Not to mention, Jim also avoids embarrassing emails
telling him his client's site is "broken".
Jim, that's a useful tip for our readers, and to show our appreciation,
we're sending you a free searchVB.com denim shirt. Wear it in good
health!
-----------------------------
Jim Lewis
jlewis@jimbabwe.com
Jim is the owner of "Jimbabwe" (http://jimbabwe.com), a company that
focuses on database consulting, software development using Internet
technology, and web application development. In addition, Jim is a
Workflow System Engineer at NorthBay Healthcare System, where he
implemented and maintains a corporate Intranet, is webmaster of the
corporate Internet site, and develops collaborative online applications
using MS Outlook and Exchange. In both jobs, Jim uses Visual Basic and
VBScript extensively.
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