[Solved] No parameterless constructor defined for this object

[Dave Hayward]

I'm  using ASP.NET MVC 3 technology and Telerik combobox in my project.

Here is how I'm populating the data:

mod.LangPref = new SelectList(new[]{
   new SelectListItem{ Text="English", Value="1"},
   new SelectListItem{ Text="French", Value="2"},
   new SelectListItem{ Text="German", Value="3"}
}, "Value", "Text", "2");

and populate the control in the view as follows:

@( Html.Telerik().DropDownList()
    .Name("langpref")
    .BindTo(new SelectList(mod.LangPref, "Value", "Text"))
    .HtmlAttributes(new { style = "width:150px; text-align: left" })
   )

 

But when I attempt to update model using the 

TryUpdateModel(mod) function

 

I'm getting error message:

 

    "No parameterless constructor defined for this object."

Could you tell me what's wrong?

Thanks.

[Georgi Krustev]

Hello Dave,

There is a known issue related with 2011.3.1306 version of Telerik Extensions for ASP.NET MVC. Please download the latest internal build and give it  a try. Let me know what your findings are. 

Regards,
Georgi Krustev
the Telerik team

[Clark]

I am getting the same error message with the menu control. I have tried previous versions of the control, but I am still getting the error. 

The only way I can make the application run is to remove the Action(string ActionName, string ControllerName ) functions, Which defeats the purpose of having a menu.

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>
 
    <% Html.Telerik().Menu()
           .Name("NotificationMenu")
           .Items(menu => {
               menu.Add()
                   .Text("Notification")
                   .Items(item => {
                       item.Add()
                           .Action( "Index", "Subscriber")
                           .Text("My Subscribers");
                       item.Add()
                           .Action("Create", "Subscriber")
                           .Text("Add Subscriber");
                   });
           }).Render(); %>

  

[Georgi Krustev]

Hi,

 
Check this forum thread for more information.

Kind regards,
Georgi Krustev
the Telerik team

[Doogle]

We encountered this when we started adding parameterized constructors to our controllers.
It seems that the menu control hits the default constructor to make sure that the action you specified is valid.
Your constructor either has to have no constructor (in which case a no-arg one is created for you behind-the-scenes) or if you have a parameterized constructor, you need to add a no-arg one so that the menu will not crash things.