类型安全枚举或属性枚举
本文关键字:枚举 属性 类型安全 | 更新日期: 2024-10-18 18:33:25
我的第一种方法看起来会很好地工作,直到我遇到一个运行时错误,我不知道如何在var name = ((LCData)attributes[0]).Name;
中解决索引超出范围的问题。实际上,我只是在复制我在Getting attributes of Enum';的值,所以我不能100%确定它到底做了什么。因此,当以下代码不起作用时,我转向另一个解决方案。
public enum Identification : ushort
{
[LCAttribute("IMG_BG01_Greens")]
BG01_Greens = 0,
[LCAttribute("Rabbit", "IMG_E01_Rabbit")]
ENEMY_E01_Rabbit = 2000,
}
public static class Enums
{
public static LCData GetInfo(Identification id)
{
var type = typeof(Identification);
var memInfo = type.GetMember(id.ToString());
var attributes = memInfo[0].GetCustomAttributes(typeof(LCData), false);
var name = ((LCData)attributes[0]).Name;
var tex = ((LCData)attributes[0]).Texture;
LCData data;
data.Name = name;
data.Texture = tex;
return data;
}
}
public struct LCData
{
public string Name;
public string Texture;
public LCData(Identification id)
{
this = Enums.GetInfo(id);
}
}
public class LCAttribute : System.Attribute
{
private string _Name;
public string Name
{
get
{
return _Name;
}
}
private string _Texture;
public string Texture
{
get
{
return _Texture;
}
}
public LCAttribute(string texture)
{
_Texture = texture;
}
public LCAttribute(string name, string texture)
{
_Name = name;
_Texture = texture;
}
}
其次,我尝试了类型安全枚举方法。这有两个致命的弱点,我找不到解决方案:
1) 我无法获取用于循环操作的可用枚举项的列表。
2) 我无法通过id号获取相应的枚举条目。
public sealed class Identification
{
private readonly ushort _ID;
private readonly string _Name;
private readonly string _Tex;
public static readonly Identification BG01_Greens = new Identification(0, "IMG_BG01_Greens");
public static readonly Identification ENEMY_E01_Rabbit = new Identification(2000, "Rabbit", "IMG_E01_Rabbit");
private Identification(ushort id, string tex)
{
_ID = id;
_Tex = tex;
}
private Identification(ushort id, string name, string tex)
{
_ID = id;
_Name = name;
_Tex = tex;
}
public ushort ID { get { return _ID; } }
public string Name { get { return _Name; } }
public string Texture { get { return _Tex; } }
}
我应该如何继续?为什么我的第一个解决方案不起作用?
您混淆了LCData
和LCAttriubte
。因为LCAttribute
是一个有效的属性,但您正试图使用LCData
作为属性。(顺便说一句,你可能不需要两种不同的类型……但我同意你)。
这是一个被破解的代码:
public enum Identification : ushort
{
[LCAttribute("IMG_BG01_Greens")] //Look the type of the attributes is LCAttribute
BG01_Greens = 0,
[LCAttribute("Rabbit", "IMG_E01_Rabbit")]
ENEMY_E01_Rabbit = 2000,
}
public static class Enums
{
public static LCData GetInfo(Identification id)
{
var type = typeof(Identification);
var memInfo = type.GetMember(id.ToString());
//this will return an array of LCAttributes
var attributes = memInfo[0].GetCustomAttributes(typeof(LCAttribute), false);
//I tell you they are LCAttribute not LCData
var name = ((LCAttribute)attributes[0]).Name;
var tex = ((LCAttribute)attributes[0]).Texture;
//If the above were an LCData why would create a new one here? [Rethorical]
LCData data;
data.Name = name;
data.Texture = tex;
return data;
}
}
注意:对于替代方法,以及对这种方法的一些见解,你可以看到我对如何制作一个与数据相关的"枚举"的回答?。您在此处使用的方法列在"自定义属性"下。