[Solved] System.MissingMethodException: Cannot create an instance of an interface

[Thomas]

I get the error:
System.MissingMethodException: Cannot create an instance of an interface
at
Line 13:     <%= Html.Telerik().Grid(Model)

I have a view that is based on an interface, like so:

 

 

 

<%

@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<ISomething>>" %>
Format Code Block (
<%= Html.Telerik().Grid(Model)
 .Name("vSomething")
 .Sortable()
.DataKeys(dataKeys => dataKeys.Add(a => a.Id))
.ToolBar(commands => commands.Insert())
.DataBinding(dataBinding => dataBinding.Server()
  .Update("Update", "Admin")
  .Insert("Insert", "Admin")
)
.Columns(columns => {
  columns.Bound(a => a.Name);
  columns.Command(commands => commands.Edit());
})
%>

 

 

 

)

I really need the view to be based on an interface. What can I do to fix this?

 

 

 

 

 

 

 

 

[Atanas Korchev]

Hi Thomas,

I created a sample application showing how to use interfaces during editing. Have in mind though that this only works for server side editing. For ajax editing the grid needs to render the editor templates before going in edit mode and thus tries to instantiate the model. If the model is interface this would fail.

Regards,
Atanas Korchev
the Telerik team

[Krishna]

I have this same problem. I am trying to edit values in a Grid. The View is based on an Interface. I have used Server binding but I still get this error. Please help.