combine C# and javascript code

Question

i have a javascript alert in C# code like this

if(Session["msg"] != null){
       string msg = (string)Session["msg"];
       if(msg.Length > 2) {
           @: var msg = @msg;
           @: alert(msg);
                               }

But in the view the alert doesn't appear:

result

The problem is that the alert message is written to the view.

Why does this happen? How can I fix this?

It's doing some form of escaping. A lot of template languages do this by default. I don't know anying about C# or the razor framework, but it may be worth looking into the razor documentation... there are a ton of answers on here that solve this problem @Html.Raw() or something like that. — Dauh Fhauc
– Dauh Fhauc, Commented Oct 11, 2013 at 17:25
If this code block is placed inside <script> tags, it should work. Also you are missing quotes on msg — user619656
– user619656, Commented Oct 11, 2013 at 17:27
You can see the message in the view because is rendered as text inside/as html. What you want rendered by MVC is: <script> var msg="alert message"; alert(msg);</script>. — user619656
– user619656, Commented Oct 11, 2013 at 18:01

McGarnagle · Accepted Answer · 2013-10-11 17:36:50Z

3

You need to wrap the injected Razor string in quotes:

@: var msg = "@msg";

Let's say the content of "msg" is "Something" ... then, without the quotes, the rendered script would look like this:

var msg = Something

Which would be invalid, because there's no variable named "Something".

answered Oct 11, 2013 at 17:36

McGarnagle

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