How can I add a class to this version of a dropdownlistFor?

Question

There seem to be many different ways to create a dropdownlistFor. Viewbags etc.

I've been trying some different versions but always have problem adding all the "attributes" I need. It can't be possible that I should have to choose whether I want to use Distinct() OR add a class to my dropdownlistFor.

Please have a look at this, how would you go about adding a class to this:

 @Html.DropDownListFor(model => model.CatDropTemp,
                                Model.Categories.Distinct().Select(kat => new SelectListItem { Text = kat, Value = kat }), "----Choose----")

Answer 1

Look at this overload of the DropDownListFor. It has all the params you are using plus additional one, object htmlAttributes. Basically that is how you assign arbitrary html attributes to the resulting tag. So if you wanted something like someAttribute, you would pass new object { someAttribute = "value" }.

Now class is a bit different since this is a key word in C#. So for class you should precede it is @. Like this:

@Html.DropDownListFor(
    model => model.CatDropTemp,
    Model.Categories.Distinct().Select(kat => new SelectListItem { Text = kat, Value = kat }),
    "----Choose----",
    new object { @class = "theClass" })