C#中的列舉基本操作

 /// <summary>
/// 訂單稽核狀態
/// </summary>
public enum GetState
{
    [Description("稽核中")]
    inReview = 1,            
    [Description("稽核通過")]
    approve = 2,
    [Description("退回")]
    return = 0,
}

/// <summary>
/// 列舉欄位描述列表
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static IList<string> GetEnumDescriptionList(Type t)
{
    var valueDescList = Enum.GetValues(t).Cast<Enum>().Select(m => GetEnumDescription(m)).ToList();
    return valueDescList;
}
 

/// <summary>
/// 列舉下拉列表
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public static IList<SelectListItem> GetEnumList(Type t)
{
    var enumList = Enum.GetValues(t).Cast<Enum>()
    .Select(m =>
    {
        return new SelectListItem()
        {
            Text = GetEnumDescription(m),
            Value = Enum.GetName(t, m)
        };
    }).ToList();
    return enumList;
}
 

/// <summary>
/// 獲取列舉的描述資訊（Description特性）
/// </summary>
/// <param name="enumValue">列舉值</param>
/// <returns></returns>
public static string GetEnumDescription(Enum enumValue)
{
    Type type = enumValue.GetType();
    FieldInfo fi = type.GetField(enumValue.ToString());
    object[] attrs = fi.GetCustomAttributes(typeof(DescriptionAttribute), true);
    if (attrs.Length > 0)
        return ((DescriptionAttribute)attrs[0]).Description;
    return "";
}
 

int 型別轉對應的列舉值
(EnumType)model.SaleState

int 型別獲取列舉的描述資訊
GetEnumDescription((EnumType)model.SaleState)