Enum -> MVC3 SelectList

Converts an Enum to a Selectlist which can be used by a @Html.DropDownList

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open System
open System.Web
open System.Web.Mvc


let enumToSelectList<'a, 'b when 'a : enum<'b> and 'a : equality>(enum:'a) = 
  let toSelectListItem (valv, text, selected) =
    let sli = new SelectListItem()
    sli.Selected <- selected
    sli.Value <- valv
    sli.Text <- text
    sli

  System.Enum.GetValues(typeof<'a>) 
    |> Seq.cast<'a> 
    |> Seq.map (fun en -> toSelectListItem ((LanguagePrimitives.EnumToValue en).ToString(), en.ToString(), (enum = en)))

namespace System

namespace System.Web

val enumToSelectList : enum:'a -> seq<obj> (requires enum and equality)

Full name: Script.enumToSelectList

val enum : value:int32 -> 'U (requires enum)

Full name: Microsoft.FSharp.Core.Operators.enum

val enum : 'a (requires enum and equality)

val toSelectListItem : ('c * 'd * 'e -> 'f)

val valv : 'c

val text : 'd

val selected : 'e

val sli : 'f

namespace System.Text

type Enum =
  member CompareTo : target:obj -> int
  member Equals : obj:obj -> bool
  member GetHashCode : unit -> int
  member GetTypeCode : unit -> TypeCode
  member HasFlag : flag:Enum -> bool
  member ToString : unit -> string + 3 overloads
  static member Format : enumType:Type * value:obj * format:string -> string
  static member GetName : enumType:Type * value:obj -> string
  static member GetNames : enumType:Type -> string[]
  static member GetUnderlyingType : enumType:Type -> Type
  ...

Full name: System.Enum

Enum.GetValues(enumType: Type) : Array

val typeof<'T> : Type

Full name: Microsoft.FSharp.Core.Operators.typeof

module Seq

from Microsoft.FSharp.Collections

val cast : source:Collections.IEnumerable -> seq<'T>

Full name: Microsoft.FSharp.Collections.Seq.cast

val map : mapping:('T -> 'U) -> source:seq<'T> -> seq<'U>

Full name: Microsoft.FSharp.Collections.Seq.map

val en : 'a (requires enum and equality)

module LanguagePrimitives

from Microsoft.FSharp.Core

val EnumToValue : enum:'Enum -> 'T (requires enum)

Full name: Microsoft.FSharp.Core.LanguagePrimitives.EnumToValue

Object.ToString() : string

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More information

Link:	http://fssnip.net/9G
Posted:	12 years ago
Author:	christophd
Tags:	mvc3 , mvc , enum