Hello,

Umbraco 4.7 Razor is all dynamic and you can't use OrderByDescending(x => x.articleViews) because extension methods don't work on dynamic objects. There is a walkthourgh here which might help: http://umbraco.com/follow-us/blog-archive/2011/2/23/umbraco-47-razor-feature-walkthrough-%E2%80%93-part-1

It's probably best to just not use dynamics here. So debug te code and check what @Model.NodeById(1203) .Descendants() .Where("NodeTypeAlias==\"..."") returns. Probably something like DynamicNodeList.

Than something like this should work:

DynamicNodeList articles = @Model.NodeById(1203).Descendants().Where("NodeTypeAlias==\"..."");
articles.OrderByDescending(x => Convert.ToInt32(x.articleViews))

Jeroen

Thanks for the advice, Jeroen. I am still running into issues unfortunately.

I can confirm that @articles is returning an object of type umbraco.MacroEngines.DynamicNodeList

When I attempt to do articles.OrderByDescending(x => Convert.ToInt32(x.articleViews)) I get the same error: "Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type."

I've gotten this far before but I'm not sure of the correct way to cast/convert the type.

Hello,

Could you show me the code?

So instead of this:

var articles= @Model.NodeById(1203).Descendants().Where("NodeTypeAlias==\"..."");

You should do this:

DynamicNodeList articles = @Model.NodeById(1203).Descendants().Where("NodeTypeAlias==\"..."");

Don't use var because than it's still dynamic.

Jeroen

Here's my code:

@using umbraco.MacroEngines;
@inherits umbraco.MacroEngines.DynamicNodeContext
@{
    var contentRoot = @Model.NodeById(1203); //home node

    DynamicNodeList articles= contentRoot
                .Descendants()
                .Where("NodeTypeAlias!=\"ArticlesContainer\"");
}

<h3>Popular Articles</h3>
<ul>@foreach (var article in articles.OrderByDescending(x => Convert.ToInt32(x.articleViews))) { ... }</ul>

And I'm now getting this error:

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

DynamicNodeList inherits from IEnumerable<DynamicNode> so OrderByDescending should work. Did you include the System.Linq namespace?

So add this at the top of your Razor file:

@using System.Linq;

Jeroen

Jeroen,

I had not included the reference @usingSystem.Linq; but I just added it and am receiving the same error as in my previous post.

Any ideas on what the issue might be?

Bump... still stuck here.

Anyone?

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