dynamic class allocation with razor - Razor

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Max Davidse 16 posts 37 karma points

Apr 01, 2011 @ 10:42

dynamic class allocation with razor?

Hey there,

So far my first steps into Umbraco are going reasonably well..but every now and then I will bump into something I don't know how to do yet.

I am building a list of techniques, that are build up from a parent node, that is added as a parameter to a macro. This macro uses razor to build up the list, however...our designer found it funny to build it conditionally. Each 4th item gets a different style compared to the others.

Right now I have this working, but I am sure this can be done more ellegantly.

The below script is how I am doing this right now. As you can see I have tried to do it differently, but using a classextender, which I would set to " space" or nothing depending on the teller. I then wanted to concatenate that to the "class=technieken" part for the first three, and not for the last one.

I tried using

None of those tries worked so I am now stuck with repeating the code which is silly. How do I concat that classextender in razor? Thanks people.

@inherits umbraco.MacroEngines.DynamicNodeContext
@using umbraco.MacroEngines;
@using System.Linq;
 
@{
    var teller = 0;
    var classextender = "";
    dynamic node = new DynamicNode(@Parameter.ParentID);
  <h2>Technieken</h2>
  <div class="techniekenOverview">
    @foreach (var c in node.Children)
    {
        teller += 1;
        if (teller % 4 != 0)
        {
      <div onClick="window.location.href='@c.Url';" class="technieken space"> 
        <a href="@c.Url">@c.techniekTitle</a>
        <p>@c.techniekDescription</p>
        <div class="imagePlaceHolder"><img src="@c.techniekImage.mediaItem.Image.umbracoFile" alt="@c.techniekTitle" border="0" /></div>
      </div>
        }
        else
        {
      <div onClick="window.location.href='@c.Url';" class="technieken"> 
        <a href="@c.Url">@c.techniekTitle</a>
        <p>@c.techniekDescription</p>
        <div class="imagePlaceHolder"><img src="@c.techniekImage.mediaItem.Image.umbracoFile" alt="@c.techniekTitle" border="0" /></div>
      </div>
        }
    }
  </div>
  <br class="clearfloat" />
}

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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Apr 01, 2011 @ 10:49
0
Actually, you're almost there:
```
<div onClick="window.location.href='@c.Url';" class="technieken@classextender">
```
The last quotation mark was moved to the end. :-)
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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Apr 01, 2011 @ 10:51

0

By the way, doing "% 4 != 0" is not the same as "> 3", but I'm guessing you know what you're doing there. =)

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Max Davidse 16 posts 37 karma points

Apr 01, 2011 @ 10:58

Well I hope so. ;) I do % 4 != 0 so every first 3 will always get the classextender set to " space" just every 4th one, which would result in the modulus being 0, gets the other class.

I changed the script to what you see below, but get an error message.

Error loading Razor Script GetTechnieken.cshtml
c:\inetpub\wwwroot\ecologics\Umbraco.Website\macroScripts\GetTechnieken.cshtml(16): error CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement

@inherits umbraco.MacroEngines.DynamicNodeContext
@using umbraco.MacroEngines;
@using System.Linq;
 
@{
    var teller = 0;
    var classextender = "";
    dynamic node = new DynamicNode(@Parameter.ParentID);
  <h2>Technieken</h2>
  <div class="techniekenOverview">
    @foreach (var c in node.Children)
    {
        teller += 1;
        if (teller % 4 != 0)
        {
            classextender == " space";
        }
        else
        {
            classextender == "";
        }
      <div onClick="window.location.href='@c.Url';" class="technieken@classextender"> 
        <a href="@c.Url">@c.techniekTitle</a>
        <p>@c.techniekDescription</p>
        <div class="imagePlaceHolder"><img src="@c.techniekImage.mediaItem.Image.umbracoFile" alt="@c.techniekTitle" border="0" /></div>
      </div>
    }
  </div>
  <br class="clearfloat" />
}

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Max Davidse 16 posts 37 karma points

Apr 01, 2011 @ 11:11
0
*slaps his forehead*

That was just stupid, that needed to be

classextender = "space";

Not

classextender == "space";

Let's just say it is early. But now this is fixed.

Oh, I rewrote it a tiny bit:
```
<div onClick="window.location.href='@c.Url';" class="@(string.Format("technieken{0}", classextender))"> 
```
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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Apr 01, 2011 @ 11:12
0
See, I knew you knew what you were doing. :)

Oh actually, you also need to put a space in:
```
<div onClick="window.location.href='@c.Url';" class="technieken @classextender">
```
If that doesn't work, try to output @classextender elsewhere and see what happens. Maybe if it's empty your need to do @classextender.ToString()?
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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Apr 01, 2011 @ 11:14

0

Ah, excellent, we're posting at the same time. No extra space needed then, as you really want to concat them. Great, glad it works!

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Jeroen Breuer 4908 posts 12265 karma points MVP 5x admin c-trib

Apr 01, 2011 @ 12:41
0
What if I want the class attribute itself to by dynamic? For example in an li list only the last li needs the class="last". With xslt I could use xsl:attribute inside an if statement. How can I do that with razor? Can I just do this?
```
classextender = "class=\"last\"";
```
Jeroen
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Sebastiaan Janssen 5060 posts 15522 karma points MVP admin hq

Apr 01, 2011 @ 13:36

0

You can do it with First() and Last() in 4,7.1. For now you can first count the results and do a for loop instead of a foreach loop. So when i == myCount you can add the "last" class.

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Toni Becker 146 posts 425 karma points

Apr 01, 2011 @ 13:40

0

Hy Sebastiaan i know i'm posting terrible questions :) could you have a look at my post please ? Need some help for solving and integrating it into a customer project.

Here is the Link Post

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