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A Implementation - Rendering One Component Presentation Only

DD4T 1.3 comes with a few Html extension methods that allow us to render Component Presentation inside a Page Razor view using different ways of filtering through the list of ComponentPresentations on the IPage object:
  • RenderComponentPresentations() -- renders all ComponentPresentations on the page;
  • RenderComponentPresentationsBySchema() -- renders only ComponentPresentations whose Component is based on a given Schema title or TcmUri;
  • RenderComponentPresetnationsByView() -- renders only ComponentPresentations whose ComponentTemplate uses a given view name or has a given TcmUri;

There is however, no helper method that allows the rendering of just a simple plain ComponentPresentation, yet sometimes that is exactly what I would need.

Below is one such Html extension method that calls the rendering of only the given ComponentPresentation object:

public static MvcHtmlString RenderComponentPresentation(this HtmlHelper htmlHelper,
    IComponentPresentation cp)
    if (!string.IsNullOrEmpty(cp.RenderedContent))
        return new MvcHtmlString(cp.RenderedContent);
    cp.Page = PageHelper.GetPage(htmlHelper);

    IFieldSet metaFields = cp.ComponentTemplate.MetadataFields;
    string controller = metaFields.StringValue("controller");
    if (string.IsNullOrEmpty(controller))
        controller = ConfigurationHelper.ComponentPresentationController;

    string action = metaFields.StringValue("action");
    if (string.IsNullOrEmpty(action))
        action = ConfigurationHelper.ComponentPresentationAction;

    return ChildActionExtensions.Action(htmlHelper, action, controller,
        new { componentPresentation = (ComponentPresentation)cp });

Note two things about the code above:

Call this helper method using code similar to the sample below:

    @foreach (var cp in Model.ComponentPresentations)
        <div class="content">


Nivlong said…
Excellent--I always found content modeling easier when the technical team had either the background and/or the code to do things like "present only this type of content" or "show this presentation..." here.

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