Dynamic Anonymous type in Razor causes RuntimeBinderException

Question

I\'m getting the following error:

\'object\' does not contain a definition for \'RatingName\'

When you look at the anonymous dyn

Answer 1

The reason of RuntimeBinderException triggered, I think there have good answer in other posts. I just focus to explain how I actually make it work.

By refer to answer @DotNetWise and Binding views with Anonymous type collection in ASP.NET MVC,

Firstly, Create a static class for extension

public static class impFunctions
{
    //converting the anonymous object into an ExpandoObject
    public static ExpandoObject ToExpando(this object anonymousObject)
    {
        //IDictionary anonymousDictionary = new RouteValueDictionary(anonymousObject);
        IDictionary anonymousDictionary = HtmlHelper.AnonymousObjectToHtmlAttributes(anonymousObject);
        IDictionary expando = new ExpandoObject();
        foreach (var item in anonymousDictionary)
            expando.Add(item);
        return (ExpandoObject)expando;
    }
}

In controller

    public ActionResult VisitCount()
    {
        dynamic Visitor = db.Visitors
                        .GroupBy(p => p.NRIC)
                        .Select(g => new { nric = g.Key, count = g.Count()})
                        .OrderByDescending(g => g.count)
                        .AsEnumerable()    //important to convert to Enumerable
                        .Select(c => c.ToExpando()); //convert to ExpandoObject
        return View(Visitor);
    }

In View, @model IEnumerable (dynamic, not a model class), this is very important as we are going to bind the anonymous type object.

@model IEnumerable

@*@foreach (dynamic item in Model)*@
@foreach (var item in Model)
{
    
x=@item.nric, y=@item.count
}

The type in foreach, I have no error either using var or dynamic.

By the way, create a new ViewModel that is matching the new fields also can be the way to pass the result to the view.