My SelectList based on an enum cannot update the database

I have a simple Html.DropDownList that is backed by a SelectList which, in turn, is backed by my enum.

Enum Colors
Red=1,
Green,
Blue

I add an option label to my Html.DropDownList that shows &q开发者_如何学Gouot;Please select..."

The problem is when I post this page and the value is "Please select..." (int value=0) and do an UpdateModel I get an error saying, "The ViewModel was not successfully updated."

Is there any way around this?

Do not allow posting unless it is selected?

Use a nullable enum in the Controller method or ViewModel. When 0 is selected you can use:

Model.Color.HasValue

to check if a value has been set.