/// <summary>
/// http://blogs.msdn.com/b/stuartleeks/archive/2010/05/21/asp-net-mvc-creating-a-dropdownlist-helper-for-enums.aspx
/// </summary>
/// <typeparam name="TModel"></typeparam>
/// <typeparam name="TEnum"></typeparam>
/// <param name="htmlHelper"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static MvcHtmlString EnumDropDownListFor <TModel, TEnum>(this HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, TEnum> > expression)
{
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
Type enumType = GetNonNullableModelType(metadata);
IEnumerable <TEnum> values = Enum.GetValues(enumType).Cast <TEnum>();
IEnumerable <SelectListItem> items =
from value in values
select new SelectListItem
{
Text = EnumExtension.GetDisplay(value),
Value = value.ToString(),
Selected = value.Equals(metadata.Model)
};
if (metadata.IsNullableValueType)
{
items = new[] { new SelectListItem {
Text = "", Value = ""
} }.Concat(items);
}
return(htmlHelper.DropDownListFor(
expression,
items
));
}
public static MvcHtmlString DisplayForEnum <TEnum>(this HtmlHelper htmlHelper, TEnum value)
{
var text = EnumExtension.GetDisplay <TEnum>(value);
return(new MvcHtmlString(text));
}