Inserting Dropdown control in web grid in ASP.NET MVC 3.0

Question

My question is related to the inclusion of drop-down list in a web grid in MVC 3.0.

My Controller Written data as:

 

     var query = ezee.Select(c => new SelectListItem
                {
                    Value = c.CUSTOMLISTId.ToString(),
                    Text = c.CUSTOMLISTName.ToString(),
                    Selected = c.CUSTOMLISTId.Equals(itemlist.Select(i=>i.RESOURCETYPEID))
                });
    
                ViewBag.CUSTOMLIST= query.AsEnumerable();
    

i have added a drop down control to my webgrid like that :

    gridcolumns.Add(grid.Column(header: "", format: @item => Html.DropDownList("COLUMN NAME", (IEnumerable<SelectListItem>)ViewBag.CUSTOMLIST)));

The above works fine as "viewbag.CUSTOMLIST" brings me all the data from controller which i want to display, now my problem is how i can show the "selected" item in the drop down in web grid's row. I am trying to do this :

     gridcolumns.Add(grid.Column(header: "", format: @item => @Html.DropDownListFor("COLUMN NAME", ((IEnumerable<SelectlistItem>)ViewBag.CUSTOMLIST).Select(option => new SelectListItem
                 {
                     Text = (option == null ? "None" : option.Name),
                     Value = option.Id.ToString(),
                     Selected = (Model != null) && (option.Id == Model.Id)
                 }), "----Select Group----", "Group")));

By using the above my problem will get solved but this is giving me an error as :

"cannot convert from lambda expression to system.func<dynamic,object>"
as inside the grid LINQ or LAMBDA is not permitted.

WHAT should i do to show the selected item in drop down against particular records in web grid ???

Any help will be of great deal....
Thanks in Advance....