[Solved] Problem adding children in Visual Studio 2010

[Ken Lewis]

I'm in the process of moving a project from Visual Studio 2008 to 2010. My TreeView with children worked fine there but I can't get it to work in 2010. I even added the code from the online "bind to model" demo, but I have the same issue. The problem seems to start as soon as I try to add the ".Children" code.

<%= Html.Telerik().TreeView()
        .Name("TreeView")
        .BindTo(Model, mappings =>
        {
            mappings.For<TelerikMvc.Models.Category>(binding => binding
                    .ItemDataBound((item, category) =>
                    {
                        item.Text = category.CategoryName;
                    })
                    );
                    // Above works fine
                    //.Children(category => category.Products));

            //mappings.For<TelerikMvc.Models.Product>(binding => binding
            //        .ItemDataBound((item, product) =>
            //        {
            //            item.Text = product.ProductName;
            //        }));
        })
%>

One detail I notice when hovering over the "mappings" variable.
Without children, I see: "(parameter) NavigationBindingFactory<TreeViewItem> mappings"

As soon as I add the .Children part: "(parameter) TreeViewItem mappings"

Any idea what could be causing this? What am I missing?

Thanks,

Ken

[Atanas Korchev]

Hi Ken Lewis,

What is the exact problem? Could you paste the exception stacktrace (if any)?

Check if the following line is present in your web.config:

<add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

or
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

Without it the asp.net compiler will not know that the Linq 2 Sql objects implement IEnumerable<T> and binding the treeview will fail.

Greetings,
Atanas Korchev
the Telerik team

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[Ken Lewis]

Adding the assembly (either one works) fixed it!

Thank you, thank you, thank you!

Ken

[it]

Dear Sir,

How can I use these code in vb.net.

Regards

Zin