C＃中Enum.Parse的通用版本 [英] Generic version of Enum.Parse in C#

问题描述

我经常想知道为什么C＃还没有实现泛型Enum.Parse

可以说我有

< pre class =lang-cs prettyprint-override> enum MyEnum
{
Value1，
Value2
}


从XML文件/数据库条目我想创建一个枚举。

  MyEnum val =（MyEnum）Enum.Parse（typeof（MyEnum），value1，true）; 
  

它可能不是像

那样实现的

  MyEnum cal = Enum.Parse< MyEnum>（value1）; 
  

这可能看起来像一个小问题，但它似乎是一个被忽视的问题。

有什么想法？

解决方案

它已经在.NET 4中实现;看此处。

  MyEnum cal; 
 if（！Enum.TryParse< MyEnum>（value1，out cal））
抛出新的异常（value1不是枚举MyEnum的有效成员）; 
  

另外讨论这里包含一些有趣的观点。

I have regularly wondered why C# has not yet implemeted a Generic Enum.Parse

Lets say I have

enum MyEnum
{
   Value1,
   Value2
}

And from an XML file/DB entry I wish to to create an Enum.

MyEnum val = (MyEnum)Enum.Parse(typeof(MyEnum), "value1", true);

Could it not have been implemented as something like

MyEnum cal = Enum.Parse<MyEnum>("value1");

This might seem like a small issue, but it seems like an overlooked one.

Any thoughts?

解决方案

It is already implemented in .NET 4 ;) Take a look here.

MyEnum cal;
if (!Enum.TryParse<MyEnum>("value1", out cal))
   throw new Exception("value1 is not valid member of enumeration MyEnum");

Also the discussion here contains some interesting points.

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