[Solved] getting error in panelBar

[Anjali]

I am trying to use the MVC panelbar in my code. I am using the dataBindingToController. My controller looks like this

public ActionResult DataBindingToModel()
      {
          DataContext cr = new DataContext();
          return View(cr.QryNavigation(4));
      }

where QryNavigation is my stored procedure. My view looks like

<%= Html.Telerik().PanelBar()
        .Name("PanelBar")
        .HtmlAttributes(new { style = "width: 300px;" })
        .BindTo(Model, mappings =>
        {
            mappings.For<tblSection>(binding => binding
                    .ItemDataBound((item, tblSection) =>
                    {
                        item.Text = tblSection.Section;
                    })
                    .Children(tblSection => tblSection.tblSectionLinks));
            mappings.For<tblSectionLink>(binding => binding
                    .ItemDataBound((item, tblSectionLink) =>
                    {
                        item.Text = tblSectionLink.Title;
                    }));
        })
%>

I dragged two tables in my LINQTOSQL one is tblSectionLink and another one is tblsection. I also dragged the stored procedure to the dbml page.

The stroed procedure already establishes the relationship between tblSection and tblsectionLinks. My stored procedure is like this

SELECT s.Section, sl.Title, sl.Link
        FROM dbo.tblSection AS s
        INNER JOIN dbo.tblSectionLinks AS sl ON s.PKSectionID = sl.FKSectionID
        WHERE s.AccessLevel <= @Access

I am getting an error :

Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type




Line 10:         .Name("PanelBar")
Line 11:         .HtmlAttributes(new { style = "width: 300px;" })
Line 12:         .BindTo(Model, mappings =>
Line 13:         {
Line 14:             mappings.For<tblSection>(binding => binding

Any help will be greatly appreciated.

[Atanas Korchev]

Hello Nitu, 

Unfortunately the provided information is not sufficient. Please answer the following questions:

1. Is the View of the correct type? You are using the Model so if it is not of the right type the binding code will not work.
2. Are the namespaces imported? You are using mappings.For<tblSection> which will not work if the namespace of tblSection is not imported.

If your objects are Linq2SQL make sure the System.Data.Linq namespace is imported in web.config. Check this help article for further instructions.

Regards,
Atanas Korchev
the Telerik team

[Anjali]

Hi,

 Thanks Atanas, as soon as I added System.Data.Linq  in my web.config file. It started working right away. Thanks for all your help.

I was wondering if you or anyone else have an example that shows some action when the panel bar is clicked. I want to display a gridview on the right side of the panel bar when a particular item in panel bar is clicked.

Any help will be grealy appreciated.

Thanks again!!

[Anjali]

I saw the example ClientSideEvents that response to the click of the panel bar, but I was wondering if anyone has example that grabs the data from the database and shows the data in the grid when the item in the panel bar is clicked.