Using Editor Template for Rendering DropDownList

Below is an example of how to have a dropdownlist when editing a model that has an integer type property used for foreign key property. I.e.; I have a model that has this property:

int ItemId { get; set; }

Then I want every time an instance of this model type is being edited, the field is shown as a dropdownlist. To do this, inside 'EditorTemplates' folder under the global 'Views\Shared' or a view's specific folder, I create a partial view named 'Item.cshtml' like below:

@Html.DropDownListFor(model => ViewData.TemplateInfo.FormattedModelValue, ((IEnumerable<Model.Item>)ViewBag.Items).Select(option => new SelectListItem {
                Text = option.Type.Name, 
                Value = option.ItemId.ToString(),
                Selected = (Model != null) && (option.ItemId == (int)ViewData.TemplateInfo.FormattedModelValue)
            }), "Please select")

Note that, I use ViewData.TemplateInfo.FormattedModelValue to get the value. I could also write like this by declaring the model to use:

@model int

@Html.DropDownListFor(model => model, ((IEnumerable<Model.Item>)ViewBag.Items).Select(option => new SelectListItem {
                Text = option.Type.Name, 
                Value = option.ItemId.ToString(),
                Selected = option.ItemId == Model
            }), "Please select")

Then to render the custom template on my edit view page, I do:

@Html.EditorFor(model => model.ItemId, "Item")

For more details about Editor Template or Display Template, you could see my previous post.