JScript, ASP: Validation

[invitro]

I looked for this everywhere and I cannot find my answer, everyone uses VBScript.

What I have is a query that passes in a few values.

myPage?num=1&text=hi

in my ASP statement I do

num = Request('num');
text = Request('text');

If I pass in myPage?num=1 it will return an undefined value for text. I know if I tried

if(text == 'undefined')
 //work here

it will not work. Neither will using null or ''. Can I somehow validate my vars and prevent this?

I tried using try and catch but these did not work.

Thanks for any help. I'm at the end of the road for this one.

[andreys]

I'm not really following you. What are you trying to achive?
Check passed values with client side Java Script? I'm really confused.

[invitro]

Sorry for confusion.

What i mean is this:

myPage.asp

var intOrder = Request('order');
var intNum = Request('num');

In order for the request to work, myPage would have to be accessed like so:

myPage.asp?order=1&num=2

correct? But if the user took out order

myPage.asp?num=2

when I try to do work with intOrder, it will be null, or undefined. I need to be able to see if this is the case.

I tried using

if(intOrder == "null)
if(intOrder =="undefined)
if(intOrder == '')
then change intOrder to a valid var.

ect ect. and none of my solutions work.

Hope that helps
-----

So in summary, all i want to know how to do is make sure my Requested variables are valid.

[andreys]

OK,
in ASP I use this:

intOrder=request("order")

if intOrder="" then intOrder=0

OR

if Len(intOrder)=0 then intOrder=0

In ASP all variables are Variant type. You could convert its value by using CDbl, CInt, Int, CCur, etc.

Another thing: If you try to operate intOrder in JavaScript function, you need to pass your arguments as so:

<script language="JavaScript">
function showValue(intOrder){
    alert(intOrder);
}
</script>

<%
Dim intOrder

intOrder=request("order")
if len(intOrder)=0 then intOrder=0

%>

<input type="button" name="ShowValue" value="Show Value" onclick="showValue(<%=intOrder%>)">

I hope I made myself clear.

[invitro]

I understand what you mean but that dosent work. Here is my code:

<%@ Language="Javascript" %>

<%
	var intOrd = parseInt(Request('ord')); //Asc or Desc

	
	
	if (intOrd == '0)  //Also tried == '' and == ""
		Response.Write("Blank field");
%>

I know that len does not exist when coding ASP in JScript, it only works with VBScript. I'm wondering if there is a substring function or something.

Anyhow, I have no clue. Any other ideas?
Thanks for all the help anyways.


BTW: If I write out intOrd it has a value of 1.#QNAN
***?

I think I may have to resort to:

if( (intOrd > 0) && (intOrd < 5) )

or something like that.

[davebat]

why not just validate using VBSCRIPT, its easier

[invitro]

Well my whole entire site is made in JScript so switching to VB script wouldent be possible. (It calls external JS files ect. ect)

So i really have to use javascript, perhaps in the future I will think about VBScript.

[invitro]

Well if anyone else is interested, I solved the problem for Integers ONLY.

after you do

whatever = parseInt(Response('var'));

you can then just simply do

if(!whatever)
whatever = right value.


I'm still working on strings.