带有整数字符串的枚举 [英] Enum with integer strings

问题描述

我像这样有一个公开的枚举:

I have a public enum like so:

public enum occupancyTimeline
{
    TwelveMonths,
    FourteenMonths,
    SixteenMonths,
    EighteenMonths
}

我将用于 DropDown 菜单，如下所示:

which I will be using for a DropDown menu like so:

@Html.DropDownListFor(model => model.occupancyTimeline, 
   new SelectList(Enum.GetValues(typeof(CentralParkLCPreview.Models.occupancyTimeline))), "")

现在我正在寻找拥有这样的价值观的人

Now I am looking for away to have my values like so

12个月，14个月，16个月，18个月，而不是十二个月，十四个月，十六个月，十八个月

12 Months, 14 Months, 16 Months, 18 Months instead of TweleveMonths, FourteenMonths, SixteenMonths, EighteenMonths

我该怎么做?

推荐答案

您可以选中链接

他的解决方案针对的是Asp.NET，但是通过简单的修改，您就可以像

his solution was targeting the Asp.NET , but by easy modification you can use it in MVC like

/// <span class="code-SummaryComment"><summary></span>
/// Provides a description for an enumerated type.
/// <span class="code-SummaryComment"></summary></span>
[AttributeUsage(AttributeTargets.Enum | AttributeTargets.Field, 
 AllowMultiple = false)]
public sealed class EnumDescriptionAttribute :  Attribute
{
   private string description;

   /// <span class="code-SummaryComment"><summary></span>
   /// Gets the description stored in this attribute.
   /// <span class="code-SummaryComment"></summary></span>
   /// <span class="code-SummaryComment"><value>The description stored in the attribute.</value></span>
   public string Description
   {
      get
      {
         return this.description;
      }
   }

   /// <span class="code-SummaryComment"><summary></span>
   /// Initializes a new instance of the
   /// <span class="code-SummaryComment"><see cref="EnumDescriptionAttribute"/> class.</span>
   /// <span class="code-SummaryComment"></summary></span>
   /// <span class="code-SummaryComment"><param name="description">The description to store in this attribute.</span>
   /// <span class="code-SummaryComment"></param></span>
   public EnumDescriptionAttribute(string description)
       : base()
   {
       this.description = description;
   }
}

可以帮助您建立键和值列表的帮助器

the helper that will allow you to build a list of Key and Value

/// <span class="code-SummaryComment"><summary></span>
/// Provides a static utility object of methods and properties to interact
/// with enumerated types.
/// <span class="code-SummaryComment"></summary></span>
public static class EnumHelper
{
   /// <span class="code-SummaryComment"><summary></span>
   /// Gets the <span class="code-SummaryComment"><see cref="DescriptionAttribute" /> of an <see cref="Enum" /></span>
   /// type value.
   /// <span class="code-SummaryComment"></summary></span>
   /// <span class="code-SummaryComment"><param name="value">The <see cref="Enum" /> type value.</param></span>
   /// <span class="code-SummaryComment"><returns>A string containing the text of the</span>
   /// <span class="code-SummaryComment"><see cref="DescriptionAttribute"/>.</returns></span>
   public static string GetDescription(Enum value)
   {
      if (value == null)
      {
         throw new ArgumentNullException("value");
      }

      string description = value.ToString();
      FieldInfo fieldInfo = value.GetType().GetField(description);
      EnumDescriptionAttribute[] attributes =
         (EnumDescriptionAttribute[])
       fieldInfo.GetCustomAttributes(typeof(EnumDescriptionAttribute), false);

      if (attributes != null && attributes.Length > 0)
      {
         description = attributes[0].Description;
      }
      return description;
   }

   /// <span class="code-SummaryComment"><summary></span>
   /// Converts the <span class="code-SummaryComment"><see cref="Enum" /> type to an <see cref="IList" /> </span>
   /// compatible object.
   /// <span class="code-SummaryComment"></summary></span>
   /// <span class="code-SummaryComment"><param name="type">The <see cref="Enum"/> type.</param></span>
   /// <span class="code-SummaryComment"><returns>An <see cref="IList"/> containing the enumerated</span>
   /// type value and description.<span class="code-SummaryComment"></returns></span>
   public static IList ToList(Type type)
   {
      if (type == null)
      {
         throw new ArgumentNullException("type");
      }

      ArrayList list = new ArrayList();
      Array enumValues = Enum.GetValues(type);

      foreach (Enum value in enumValues)
      {
         list.Add(new KeyValuePair<Enum, string>(value, GetDescription(value)));
      }

      return list;
   }
}

然后您将枚举装饰为

public enum occupancyTimeline
{
    [EnumDescriptionAttribute ("12 months")]
    TwelveMonths,
    [EnumDescriptionAttribute ("14 months")]
    FourteenMonths,
    [EnumDescriptionAttribute ("16 months")]
    SixteenMonths,
    [EnumDescriptionAttribute ("18 months")]
    EighteenMonths
}

您可以在控制器中使用它来填充下拉列表，如下所示:

you can use it in the controller to fill the drop down list as

ViewBag.occupancyTimeline =new SelectList( EnumHelper.ToList(typeof(occupancyTimeline)),"Value","Key");

在您看来，您可以使用以下

and in your view, you can use the following

@Html.DropdownList("occupancyTimeline")

希望它将对您有帮助

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