Unterminated string constant error in ASP.NET Razor page

Question

So I'm writing an ASP.NET MVC Web application and at the top of one of my razor pages i have this code:

    <script type="text/javascript">
        alert("@TempData["alertMessage"]");
    </script>

If I understand the error

Unterminated string constant

correctly, it means I haven't closed the quotation marks. But if I look at the code it should be closed correctly right?

What is wrong about it?

This also seems to remove the error, so there's multiple correct answers. Thank you. — Dylan
– Dylan, Commented Dec 12, 2017 at 9:19
Possible duplicate of Escaping JavaScript string literals in views — GSerg
– GSerg, Commented Dec 12, 2017 at 9:34

Mihai Alexandru-Ionut · Accepted Answer · 2017-12-12 09:21:36Z

4

You should use single quotes in order to avoid the error.

alert('@TempData["alertMessage"]');

With the other words you should wrap the statement within single quotes.

edited Dec 12, 2017 at 9:21

answered Dec 12, 2017 at 9:17

Mihai Alexandru-Ionut

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4 Comments

Dylan Over a year ago

Ahhhh that fixed it for me. Thank you very much!

haim770 Over a year ago

That doesn't address the core problem which is differentiating between Razor code and HTML/JS code. Using an explicit @(...) does it well.

Mihai Alexandru-Ionut Over a year ago

@haim770, thanks for your point. This problem can appear, for instance, when you append dynamically elements to page which contains attributes and you're forces to use single quotes.

GSerg Over a year ago

This will HTML-encode the string that must be JS-encoded. Please use the correct approach instead.

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