ASP array to JavaScript array

Question

Here's my problem:

I have a one-dimensional array that is a result of some server side code in the same .asp. I want to take this array and transfer the strings in it to a javascript array, so I can use the values in a table for displaying purposes.

This is the code I have tried:

<script language="javascript">
var jsArray = [];
var n = <%=r%>;

for (n = 0; n < 4; n++){
    jsArray[n] = '<%=tulemused(n)%>'; //this isn't working for some reason
}

</script>

I personally think the error is created by the n variable. It is displayed correctly when I write it in a paragraph, but it doesn't work when used in the line marked above. I have also considered that the for loop could be the problem.

What am I doing wrong?

are you trying access server side functions from client side — Azad
– Azad, Commented Nov 21, 2015 at 10:29

Hunan Rostomyan · Accepted Answer · 2015-11-21 10:29:01Z

3

That won't work, because the asp code is going to be executed before the javascript, so there is no way to pass n in. If you really need asp to be doing some heavy lifting for you, you can make an ajax call or piggy back on a pre-established socket connection.

answered Nov 21, 2015 at 10:29

Hunan Rostomyan

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Comments

Sarath Chandra · Accepted Answer · 2015-11-21 10:39:12Z

Your "<% ="-like code will be executed when the page is rendered. That means, the way it is written, that code will be executed once when the page is rendered, trying to access the n-th element of the array. However, the variable n would NOT be in the scope of access at that time.

Hence, if you wish you use such code, you need to include the iteration also in the embedded code.

An easier workaround would be to store the list of strings (that you wish to pass) as a single concatenated string, separated by a known delimiter and access the concatenated string in Javascript and split it in JS.

That is, if the string variable tulemused_concatenated holds the concatenated strings, separated by the delimiter ',', the following script should work.

<script language="javascript">
var jsArray = [];
var n = <%=r%>;

var concatenated_string = '<%=tulemused_concatenated%>'; //this isn't working for some reason
var jsArray[n] = concatenated_string.split(',');

</script>

score 2 · Accepted Answer · 2015-12-04 14:57:11Z

2

I realise this one has been answered, but perhaps an easier rendition of this would be simply...

var jsArray = <%= "[" & Join(tulemused, ",") & "]" %>;

If you're using strings, then obviously put the speech marks in, like so...

var jsArray = <%= "['" & Join(tulemused, "','") & "']" %>;

This will avoid any embarrassing use of loops when they're not necessary.

NOTE

Please note I made a slight typo with this earlier and included square brackets inside the Join statement. This was incorrect, and the current should be used in preference.

edited Dec 4, 2015 at 14:57

answered Nov 23, 2015 at 11:01

user1945782

Comments

IrvineCAGuy · Accepted Answer · 2021-10-08 00:49:26Z

0

The server-side asp code runs first. There is not sharing of data with the client-side browser. You CAN save the results of your asp code as a session variable, then read that in later in Javascript.

answered Oct 8, 2021 at 0:49

IrvineCAGuy

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Comments

roudrabhaskarudu thammali · Accepted Answer · 2015-11-21 10:37:02Z

-2

I this this has to work for u

<script language="javascript">
var jsArray = [];
<%
    Dim n
    n=o
%>;

for (n = 0; n < 4; n++){
    jsArray[n] = '<%=tulemused(n)%>'; //this isn't working for some reason
    <%n++%>
}

answered Nov 21, 2015 at 10:37

roudrabhaskarudu thammali

1464 bronze badges

2 Comments

user692942 Over a year ago

Someone doesn't get the concept of server-side versus client-side code. The n will only be 0 then 1 nothing more, to loop the increment you would need a server-side coded loop.

user1945782 Over a year ago

@Lankymart: Nope - complete code fail. Notice that n=(lower case)o, not 0 (zero) and <%n++%> will only work in JScript.

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