Using asp.net inline tags in javascript conditional

Question

I got sick of all my jscript social widget/analytics initialization cluttering my debug output while testing my Asp.Net webforms page locally. So I tried this in my HTML markup:

<script>
if (<%= !Request.IsLocal ? "true" : "false" %>) {

This actually emits correct jscript code ("if (true)") with no run-time errors but Visual Studio doesn't like it. I'm getting a syntax error on the closing ')'. Definitely don't like seeing compile errors, even if they're bogus, every darn time I compile.

I changed it to compare strings, like

if ("<%= Request.IsLocal %>" === "False") {

Which works and emits code like 'if ("True" === "False")', but... that just grates on my nerves and looks ugly. Is this just a Visual Studio weirdness, or is there a better way to use asp.net server boolean values in jscript conditionals?

Floremin · Accepted Answer · 2013-03-12 16:46:35Z

2

Could you do something like:

<script>
  var isLocal = "<%= Request.IsLocal %>" == "True";
  ...

  if(isLocal) {
    // do local stuff
  }
</script>

VS does not complain.

answered Mar 12, 2013 at 16:46

Floremin

4,08918 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Eric Sassaman Over a year ago

Yes, as per my question, this is the current solution I'm using. My question was whether there was a better way or whether this was just some VS intellisense weirdness.

Floremin Over a year ago

VS intellisense is just confused because you are mixing JavaScript and ASP.NET code. When you put ASP.NET code within quotes, intellisense considers it a JavaScript string, but compiler correctly replaces the value within angle brackets <%= %>, so there is no "complaints" in VS. My suggestion was about isolating this "ugliness" on top of your JavaScript code. The other way to do this would be to insert JS code from you code behind, but I think that is far less straight forward.

Eric Sassaman Over a year ago

Yeah that seems to make the most sense in this situation, thanks.

Brad M · Accepted Answer · 2013-03-12 16:08:27Z

0

The combination of javascript/html/css + server tags will show squigly lines depending on their placement etc.

If you truly want to avoid that, you would have to create your javascript in the code behind.

<asp:Literal id="script" runat="server">

And in the code behind.

if (Request.IsLocal) {
    script.Text = "<script>function(){}</script>";
}

answered Mar 12, 2013 at 16:08

Brad M

7,9101 gold badge25 silver badges40 bronze badges

1 Comment

Eric Sassaman Over a year ago

This is interesting, might work well for very small scripts, but... you lose intellisense and all the usual editor goodness since VS just sees your jscript code as a string, not code... doesn't seems like a worthy trade-off to me, but thanks for the interesting option.

Collectives™ on Stack Overflow

Using asp.net inline tags in javascript conditional

2 Answers 2

3 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related