你建議我用什麼來靜態創建一個字符串值的集合？

Question

這裏是我正在做的事情，現在，宣告的Roles允許訪問我的控制器操作方法的字符串：

[Role(Roles="Regular User, Accounting, Administrator")] 
public ActionResult ChangeAvatar() 
{ 
    if (User.Identity.IsAuthenticated) 
    { 
     var user = _userRepository.FindUserByEmail(User.Identity.Name); 
     var model = new ChangeAvatarModel(); 
     model.CurrentAvatarUrl = user.AvatarUrl; 

     return View(model); 
    } 

    return RedirectToAction("Login", "Account"); 
} 

我不想寫了Roles作爲一個字符串，因爲我可能會輸錯和導致意外的錯誤。我寧願給他們寫一次，並完成它。

你對這個用例有什麼建議？ A dictionary<enum, string>？

[Role(Roles=DefinedRoles.Accounting)] // Would return string: "Regular User, Account" 
public ActionResult ChangeAvatar() 
{ 
    if (User.Identity.IsAuthenticated) 
    { 
     var user = _userRepository.FindUserByEmail(User.Identity.Name); 
     var model = new ChangeAvatarModel(); 
     model.CurrentAvatarUrl = user.AvatarUrl; 

     return View(model); 
    } 

    return RedirectToAction("Login", "Account"); 
} 

Answer 1

你可以使用一個靜態常量類：

public static class DefinedRoles 
{ 
    public const string Accounting = "Regular User, Accounting, Administrator"; 
} 

Answer 2

這種方法目前試驗，到目前爲止好..

public class StringEnum 
{ 
    private static IDictionary<string, StringEnum> _items = new Dictionary<string, StringEnum>(); 

    public static readonly StringEnum Type1 = new StringEnum("TYPE1"); 
    public static readonly StringEnum Type2 = new StringEnum("TYPE2"); 

    private string _value; 

    private StringEnum(string value) 
    { 
     _value = value; 
     _items.Add(_value, this); 
    } 

    public static implicit operator StringEnum(string value) 
    { 
     return _items[value]; 
    } 

    public static implicit operator string(StringEnum typeSafeValue) 
    { 
     return typeSafeValue._value; 
    } 

    public override bool Equals(object obj) 
    { 
     return obj.ToString() == _value; 
    } 

    public override int GetHashCode() 
    { 
     return base.GetHashCode(); 
    } 

    public override string ToString() 
    { 
     return _value; 
    } 
} 

可以使用，如：

StringEnum type = StringEnum.Type1