This is my first time with Dynamic Placeholders and having a hard time getting started.

I have installed the package from here

and trying to render a component as


When browsing the page in preview mode, the error is

    Sitecore.Mvc.Helpers.SitecoreHelper' does not contain a definition for 'DynamicPlaceholder and   
  no extension method 'DynamicPlaceholder' accepting a first argument of    
  type 'Sitecore.Mvc.Helpers.SitecoreHelper' could be found (are you missing 
   a using directive or an assembly reference?)


If I just say, @Html.Sitecore().Placeholder("section"), it works fine.

Using Sitecore 8.2 with MVC


Patrick Barron's answer worked. There are two parts to it:

In the /Views/web.config include the namespace

<add namespace="SitecoreExperienced.SitecoreControls" />

, and in the content editor, when adding the controls, append "_scexp1" to the placeholder name. eg:

1st Rendering: widgets
Placeholder key : section

2nd Rendering: banner
Placeholders : section_scexp1

3rd Rendering: banner
Placeholders : section_scexp2

  • Have you checked to make sure the additional assemblies from the marketplace package are in your Sitecore bin folder? And just as a note - this hasn't been updated for 8.2.
    – mservais
    Commented Dec 20, 2016 at 15:33
  • Be aware with this module that since the placeholder keys are generated dynamically at runtime, if you added a new banner component between 1st and 2nd it have the key section_scexp1 and the net effect is that you cannot add any new placeholder "in between". It's a bit confusing to the content editors and means manually moving components at best.
    – jammykam
    Commented Dec 21, 2016 at 19:44

1 Answer 1


From the error message, it sounds like the DLL for the Dynamic Placeholder isn't a known reference for your views. You'll want to add the following line to your /Views/Web.config file in your view folder:

<add namespace="SitecoreExperienced.SitecoreControls" />

To should look something like:

<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
    <add namespace="System.Web.Mvc" />
    <add namespace="System.Web.Mvc.Ajax" />
    <add namespace="System.Web.Mvc.Html" />
    <add namespace="System.Web.Routing" />
    <add namespace="Sitecore.Globalization"/>
    <add namespace="Sitecore.Mvc" />
    <add namespace="Sitecore.Mvc.Presentation" />
    <add namespace="System.Web.Routing" />
    <add namespace="SitecoreExperienced.SitecoreControls" />

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