Question

We have a ViewModel with a collection of Widget<dynamic>:

public class Widget<T>
{
    public string ViewName { get; set; }
    public T Data { get; set; }
}

In our View we loop through the collection of widgets and call Html.Partial.

@foreach (var widget in Model) {
    @Html.Partial(widget.ViewName, widget)
}

This works providing the partial has a dynamic model or a model of Widget<dynamic>.

However, I would like intellisense within the partial view so I give my view a model of the appropriate widget data type e.g:

@model Widget<string>

Unfortunately this throws an exception as @Html.Partial is casting the dynamic model as System.Object.

Aside from manually casting the widget again within the partial, is there a way to call Html.Partial without having the dynamic model cast as an object?

Answer 1

Create a interface and all dynamic object type widgets must implements the interface, I did the same a time ago and worked smooth

Simple example with render: (it’s just a quick example you must complete)

    public interface IWidget{

     public System.Web.Mvc.MvcHtmlString RenderMyWidget(HtmlHelper helper);

}




public class ContenidoWidgets : IWidget{

    private String Controller { get; set; }

    private String Action { get; set; }

    private Object Parms {get; set; }

    public ContenidoWidgets(String controller, String action, Object parms)
    {

        this.Controller = controller;
        this.Action = action;
        this.Parms = parms;

    }

    public System.Web.Mvc.MvcHtmlString RenderMyWidget(HtmlHelper helper){

        return System.Web.Mvc.Html.ChildActionExtensions.Action(helper, this.Action, this.Controller, this.Parms);

    }

the view….

@model IWidget

@model.RenderMyWidget(this.html);