orderby for loop

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Tom Cowling 144 posts 343 karma points

Feb 01, 2016 @ 11:56

OrderBy For loop

Hey guys,

I'm having a bit of trouble trying to order some results from a for loop. I'm not very good with razor, so getting the syntax right is killing my brain off! I'm not sure if I need to be looking into the .Where expression or the for loop itself.

I'd like the months to be outputted by publishDate Descending.

@helper RenderMonthChildren(umbraco.MacroEngines.DynamicNode month)
{
    var posts = month.Children.Where(c => c.Visible && c.NodeTypeAlias == "BlogEntry");
    if(posts.Any())
    {
        foreach(var post in posts)
        {
            <div class="blog-post-summary">
                <h3><a href="@post.Url">@post.GetPropertyValue("heading")</a></h3>
                <p class="blog-date"><em>@DateTime.Parse(post.GetPropertyValue("publishDate")).ToString("ddd, dd MMMM yyyy")</em></p>
                <p>@post.GetPropertyValue("summary")<br /><br /></p>
                <p class="blog-read-more"><a href="@post.Url">Read more</a></p>
            </div>
        }
    }
}

Any help would be much appreciated!

Thanks,

Tom

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Dennis Aaen 4500 posts 18255 karma points admin hq c-trib

Feb 01, 2016 @ 12:22

Hi Tom,

Could you then try to do something like this to see if this will work for you.

@helper RenderMonthChildren(umbraco.MacroEngines.DynamicNode month)
{
    var posts = month.Children.Where(c => c.Visible && c.NodeTypeAlias == "BlogEntry");
    if(posts.Any())
    {
        foreach(var post in posts.OrderByDescending(x => x.publishDate)
        {
            <div class="blog-post-summary">
                <h3><a href="@post.Url">@post.GetPropertyValue("heading")</a></h3>
                <p class="blog-date"><em>@DateTime.Parse(post.GetPropertyValue("publishDate")).ToString("ddd, dd MMMM yyyy")</em></p>
                <p>@post.GetPropertyValue("summary")<br /><br /></p>
                <p class="blog-read-more"><a href="@post.Url">Read more</a></p>
            </div>
        }
    }
}

Hope this helps,

/Dennis

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Tom Cowling 144 posts 343 karma points

Feb 01, 2016 @ 12:27

Thanks for the quick response Dennis.

Sorry - forgot to mention that publishDate was a field I have added. Would this explain the following error?

error CS1061: 'umbraco.MacroEngines.DynamicNode' does not contain a definition for 'publishDate' and no extension method 'publishDate' accepting a first argument of type 'umbraco.MacroEngines.DynamicNode' could be found (are you missing a using directive or an assembly reference?)

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Dennis Aaen 4500 posts 18255 karma points admin hq c-trib

Feb 01, 2016 @ 12:30
0
Hi Tom,

Okay what if you just do:
```
foreach(var post in posts.OrderBy("publishDate, desc")
```
Would this work for you then, or are you getting the same error?

/Dennis
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Tom Cowling 144 posts 343 karma points

Feb 01, 2016 @ 12:32

Slightly different error this time..

error CS0411: The type arguments for method 'System.Linq.Enumerable.OrderBy(System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

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Lars-Erik Aabech 350 posts 1102 karma points MVP 8x c-trib

Feb 01, 2016 @ 12:46

101

Try posts.OrderByDescending(x => x.GetPropertyValue("publishDate")). :)

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Tom Cowling 144 posts 343 karma points

Feb 01, 2016 @ 12:48

1

Perfect. :)

Thanks Lars-Erik.

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