字符串到C＃中的枚举转换 [英] String to enum conversion in C#

问题描述

 等于
不等于
小于
大于
  

请注意，这些字符串包含空格。我有一个枚举与这些条目匹配，如：

 枚举操作{Equals，Not_Equals，Less_Than，Greater_Than}; 
  

由于空间不允许，我使用_字符。

现在，有没有办法将给定的字符串自动转换为枚举元素，而无需编写循环或一组if（C）条件我的自我？

解决方案

我建议建立一个 Dictionary< string，Operation> 将友好名称映射到枚举常量，并在元素本身中使用正常的命名约定。

 枚举操作{Equals，NotEquals，LessThan，GreaterThan}; 
 
 var dict = new Dictionary< string，Operation> {
 {Equals，Operation.Equals}，
 {Not Equals，Operation.NotEquals}，
 {Less thanan，Operation.LessThan}，
 { 大于，Operation.GreaterThan} 
}; 
 
 var op = dict [str]; 
  

或者，如果你想坚持你现在的方法，你可以做（​​我建议反对做）：

  var op =（Operation）Enum.Parse（typeof（Operation），str.Replace（''，'_ ））; 
  

I have a combo box where I am displaying some entries like:

Equals
Not Equals 
Less Than
Greater Than

Notice that these strings contain spaces. I have a enum defined which matches to these entries like:

enum Operation{Equals, Not_Equals, Less_Than, Greater_Than};

Since space is not allowed, I have used _ character.

Now, is there any way to convert given string automatically to an enum element without writing a loop or a set of if conditions my self in C#?

解决方案

I suggest building a Dictionary<string, Operation> to map friendly names to enum constants and use normal naming conventions in the elements themselves.

enum Operation{ Equals, NotEquals, LessThan, GreaterThan };

var dict = new Dictionary<string, Operation> {
    { "Equals", Operation.Equals },
    { "Not Equals", Operation.NotEquals },
    { "Less Than", Operation.LessThan },
    { "Greater Than", Operation.GreaterThan }
};

var op = dict[str]; 

Alternatively, if you want to stick to your current method, you can do (which I recommend against doing):

var op = (Operation)Enum.Parse(typeof(Operation), str.Replace(' ', '_'));

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