Hi,

I've written extension methods for Umbraco 4.7 based on that blog-post and they work fine. Remember that your extension methods MUST go in a static class and you may need to import the namespace. One easy way to use extension methods is to simply place your code in the App_Code folder (at least whilst developing). For instance, here's an entire example of an extension method class I've put in App_Code called RazorExtensions.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using umbraco.MacroEngines;

namespace Diplo
{
   public static class RazorExtensions
   {
     public static DynamicNodeList TopNodesByDate(this DynamicNodeList nodes, int amount)
      {
         return new DynamicNodeList(nodes.Items.OrderBy(d => d.CreateDate).Take(amount));
       } 
    }
}
 

And now here's an example of it in use:

<ul>
    @foreach (var item in Model.Children.TopNodesByDate(3))
  {
        <li><a href="@item.Url">@item.Name</a></li>
    }
</ul>
 

Good explanation Dan, works for me! Don't actually need the namespace and some of the usings:

using System.Linq;
using umbraco.MacroEngines;

public static class RazorExtensions
{
    public static DynamicNodeList TopNodesByDate(this DynamicNodeList nodes, int amount)
    {
        return new DynamicNodeList(nodes.Items.OrderBy(d => d.CreateDate).Take(amount));
    }
}

Thanks, Seb. True, you don't need those namespaces but Visual Studio likes to add them and who am I to argue with M$? :)

I'm experiencing the same issue. I have placed the following in the project App_Code folder

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using umbraco.MacroEngines;

namespace Dool {
  public static class RazorExtensions {
    public static bool ContainsAny(this string haystack, List needles) {
      if (!string.IsNullOrEmpty(haystack) || needles.Count > 0) {
        foreach (string value in needles) {
          if (haystack.Contains(value)) { return true; }
        }
      }
      return false;
    }
  }
}

And below is my Razor script

@inherits umbraco.MacroEngines.DynamicNodeContext

@using uComponents.Core
@using uComponents.Core.uQueryExtensions
@using System.Linq

@{
  var rootNode = uQuery.GetRootNode();
  var searchString = HttpContext.Current.Request.QueryString["SearchTerm"];
  var keywords = HttpContext.Current.Request.QueryString["SearchTerm"].Split(' ').ToList();
  var values = new Dictionary();
  values.Add("keywords", keywords);
  var pagesToList = rootNode.GetDescendantNodes().Where(x =>
    x.Name.ToLower().Contains(searchString) ||
    x.GetPropertyAsString("bodyText").ToLower().ContainsAny(keywords)
);
...

And this is the error that is appearing.

 'string' does not contain a definition for 'ContainsAny' and no extension method 'ContainsAny' accepting a first argument of type 'string' could be found

The Umbraco example, calls ContainsAny like follows

var items = @Model.Children.Where("Name.ContainsAny(keywords)", values); 

Any ideas on how I correctly call ContainsAny with the syntax that I am using?

you will need to add (for your example extension method)

@using Dool

to your razor file, you need to register the namespace to your extension method class for c# to be able to see it and run the method, thi goes for normal classes to.

Thanks Scott Williams - exact answer I was looking for

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