testing for undefined 1

[TheConeHead]

How would I test the condition of an undefined variable?

What I am doing is in an asp page I am doing:

variable1 = Request.QueryString("varName"

Now I want to use it is it is there but assign a default value if not... something like:

if (variable1 == null) {
variable1="value";
}

 

[snoopy75]

This is better suited to the ASP forum... but here's your answer, anyway... ;-)

Dim variable1
variable1 = 1 'default value
If Request.QueryString(&quot;varname&quot;) <> &quot;&quot; Then
   variable1 = Request.QueryString(&quot;varname&quot;)
End If

Hope this helps!

 

[TheConeHead]

yeah I tried the ASP forum... no luck... as you can see (and the reason I am here, I am using JavaScript not VB) Anyway.... I converted your script to:

variable1 = 1 'default value
if (Request.QueryString("varname&quot != "&quot {
variable1 = Request.QueryString("varname"
}


it does not work....

 

[jaredn]

This works for me:

teamleader = new String(Request("teamleader"))

if(teamleader=="undefined")
{
    teamleader = "" //default value
}

Note well, the .QueryString isn't necessary (though I bet it trivially increases performance). Note also, I convert the Request explicitly to a string. I'm not sure why this solves a large number of my problems, but it does.

jared@eae.net -

http://webfx.eae.net

 

[xutopia]

did you guys try typeof?

if (typeof teamleader == "undefined&quot
{
...
}

Gary

http://www.xutopia.com

Haran
********************************

 

[vilaishima]

You must omit the quotes from the code like this:
if(teamleader!=undefined)

some version of IE does not like this though, use:

if(!teamleader)

 

[TheConeHead]

he has the quotes because he is converting it to a string:

teamleader = new String(Request("teamleader