ASP.NET MVC 3 and ASP.NET MVC 4 razor syntax changes?

Question

I created two application in VS2012

Application#1. MVC 3, NET 4.5
Application#2. MVC 4, NET 4.5

Now I open any .cshtml file and add the following code:

<div>
@if (true)
{
      @string.Format("{0}", "test")
}
</div>

It works just fine in Application#1 (mvc3) and I see "test" word displayed. But it doesn't work in Application#2 (mvc4).

Could anybody explain why it happens and what should be changed?

UPDATE: I've just found out one more very weird thing. If you replace @string.format("some text") with @String.format("some text") everything works fine (note uppercase String)

Yes, I'm sure. See the updated code (I replaced it with "true") — Andrei M
– Andrei M, Commented Oct 2, 2012 at 13:10
Please try my updated answer with <p>@string.Format("{0}", "test")</p> and it should work... ;) + 1 For sure ;) — Jigar Pandya
– Jigar Pandya, Commented Oct 2, 2012 at 13:53
Basically without HTML place holder where the TEST would display on broswer??? Browser understand HTML TAG which is missing here... — Jigar Pandya
– Jigar Pandya, Commented Oct 2, 2012 at 13:54
Jigar, thanks for reply. But I don't want <p> to be rendered. <text> is better solution — Andrei M
– Andrei M, Commented Oct 3, 2012 at 9:08

EdSF · Accepted Answer · 2012-10-02 14:47:46Z

6

We had a similar issue when upgrading... it appears that simply writing @string.Format("{0}", "test") will no longer write directly onto the page as it did in MVC3. You instead have to do something like this:

<div>
@if (true)
{
      Html.Raw(string.Format("{0}", "test"));
}
</div>

or

<div>
@if (true)
{
      <text>@string.Format("{0}", "test"))</text> //added @ to evaluate the expression instead of treating as string literal
}
</div>

edited Oct 2, 2012 at 14:47

EdSF

12.5k6 gold badges45 silver badges85 bronze badges

answered Oct 2, 2012 at 14:08

Adam Spicer

2,72126 silver badges37 bronze badges

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

3 Comments

Andrei M Over a year ago

I've just found out one more very weird thing. If you replace @string.format("some text") with @String.format("some text") everything works fine (note uppercase String)

Andrei M Over a year ago

BTW, Html.Raw won't encode text. <text>...</text> solution is better one

Adam Spicer Over a year ago

I'll have to test that string casing that you mentioned. That would really be absurd if that made a difference. I showed both examples of emitting raw HTML and encoded HTML intentionally. Html.Raw may be a viable solution. For me, there are cases where I want to emit raw HTML. But obviously that depends on your application and scenario.

Darren · Accepted Answer · 2012-10-02 07:07:46Z

0

Are you using the Razor engine?

Since you are in a @if block you could write: string.Format("{0}", "test") rather than @string.Format("{0}", "test").

Note the @

answered Oct 2, 2012 at 7:07

Darren

71.2k24 gold badges141 silver badges146 bronze badges

1 Comment

Andrei M Over a year ago

It does not compile. It requires ; at the end. But once added, it does not render "test" string in output HTML

Jigar Pandya · Accepted Answer · 2012-10-02 13:52:09Z

0

In Razor Syntax for Conditional check you can start a block with one @ sign and then put your Condition inside..

E.g

  @{var price=20;}
<html>
<body>
@if (price>30)
  {
  <p>The price is too high.</p>
  }
else
  {
  <p>The price is OK.</p>
  }
</body>
</html>

So in your case you are using two @ within one block. Check that part and it will be resolved.

So your code block should look like following.

<div>
@if (Model == null)
{
      <p>@string.Format("{0}", "test")</p>
}
</div>

On top of that if you put "@" two time like it is there in your code lines it will give you hint as image below. This is feature of Razor Syntax 4.0. Also you miss the ";" in you code line.

enter image description here

http://www.w3schools.com/aspnet/razor_cs_logic.asp

edited Oct 2, 2012 at 13:52

answered Oct 2, 2012 at 7:11

Jigar Pandya

5,9852 gold badges29 silver badges47 bronze badges

1 Comment

Andrei M Over a year ago

Thanks for reply. Your code compiles (string.Format("{0}", "test");), but it does not render "test" string. How should it be rendered now? And why did it work fine in MVC3?

Collectives™ on Stack Overflow

ASP.NET MVC 3 and ASP.NET MVC 4 razor syntax changes?

3 Answers 3

3 Comments

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

3 Comments

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related