Using <%= syntax for javascript in aspx pages

Question

I am using charts.js in one of the aspx page. Everything works except for one issue. Consider the code below,

window.myBar = new Chart(context).Bar(chData, {
    showScale: true,
    scaleLabel : "<%= Number(value).toFixed(0).replace('.', ',') + ' %'%>",
});

This works fine in a plain html page, but when used on the aspx page, the compiler tries to evaluate the code as aspx due to the <%= syntax that is used in aspx and it creates problems. Is there a way I can use this javascript code in aspx?

You mean that <%= should come in the actual HTML document? — Patrick Hofman
– Patrick Hofman, Commented Jul 14, 2015 at 9:19

Patrick Hofman · Accepted Answer · 2015-07-14 09:33:33Z

1

You can try by escaping the characters (symbolsw) and see if aspx still recognizes them (the expected is it should recognize them as plain text now).

"\<\%\= Number(value).toFixed(0).replace('.', ',') + ' %'\%\>"

or alternatively you can place your JavaScript code in a separate file

edited Jul 14, 2015 at 9:33

Patrick Hofman

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answered Jul 14, 2015 at 9:24

vims liu

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2 Comments

redGREENblue Over a year ago

Escaping like this "<\%= works, I just figured that out after posting the question.

vims liu Over a year ago

Hi, since lack of reputation to comment the other answer, for better/worse, its upto you but if its for readability i'd prefer using escape character and also it seems majority uses escape character for simplicity

Patrick Hofman · Accepted Answer · 2015-07-14 09:20:51Z

1

It feels like a workaround, but it does the job:

"<" + "%=

I do wonder though why one would want this.

answered Jul 14, 2015 at 9:20

Patrick Hofman

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2 Comments

redGREENblue Over a year ago

It works. Also, I just figured out "<\%= works too. Would that be any better/worse?

Patrick Hofman Over a year ago

I am not sure, haven't programmed WebForms for years now.

Helio Santos · Accepted Answer · 2015-07-14 09:45:39Z

1

You can also make it a string:

<%= @"

window.myBar = new Chart(context).Bar(chData, {
        showScale: true,
        scaleLabel : ""<%= Number(value).toFixed(0).replace('.', ',') + ' %'%>"",
        });
" %>

answered Jul 14, 2015 at 9:45

Helio Santos

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Comments

Sujit.Warrier · Accepted Answer · 2015-07-15 11:08:56Z

1

replace "" in "<%= Number(value).toFixed(0).replace('.', ',') + ' %'%>" with '' and ' %' to " %" and make it '<%= Number(value).toFixed(0).replace('.', ',') + " %"%>'. im new to this but this seemed to work for me

edited Jul 15, 2015 at 11:08

answered Jul 14, 2015 at 9:35

Sujit.Warrier

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