MVC gives a strange error

The error message I'm getting is:

The model item passed into the dictionary is of type 'System.Data.Linq.DataQuery`1[MvcApplication1.ContentPageNav]', but this dictionary requires a model item of type 'MvcApplication1.ContentPageNav'.

public ActionResult Edit()
{
   DataClasses1DataContext dc = new DataClasses1DataContext();
   var model = from m in dc.ContentPageNavs
      select m;
   return View(model);
}

Any ideas on why I get this error? Any help will be开发者_开发知识库 appreciated.

You are selecting a list of ContentPageNav into your model variable.

The view is expecting a ContentPageNav, not a list of them.

Try this:

var model = (from m in dc.ContentPageNavs
  select m).FirstOrDefault();

It looks like your page is expecting a single ContentPageNav, not a LINQ expression. Try

return View(model.FirstOrDefault());

or

var model = dc.ContentPageNavs.FirstOrDefault();

Try this(your code does not work because of you view wait for ContentPageNav item but you send a list of ContentPageNav):

public ActionResult Edit()
{
   using(DataClasses1DataContext dc = new DataClasses1DataContext())
   {
     // here you can select some specific item from the ContentPageNavs list
     // Following query take first item from the list
     var model = dc.ContentPageNavs.FirstOrDefault();
     return View(model);
   }
}

As the error indicates the types don't match. The view expects a single item but you are passing in a collection of items. Try passing this in as the model : (from m in dc.ContentPageNavs select m).FirstOrDefault();

Have a look at your view it is strongly typed. It should say something like

Inherits="System.Web.Mvc<ContentPageNav>"

if you need a list you may want to consider using

Inherits="System.Web.Mvc<IList<ContentPageNav>>"

or some kind of list ... your LINQ might be wrong though if this is not intended.