C#中字符串到枚举的转换 [英] String to enum conversion in C#

问题描述

我有一个组合框，我在其中显示了一些条目，例如:

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

Equals
Not Equals 
Less Than
Greater Than

注意这些字符串包含空格.我定义了一个与这些条目匹配的枚举，例如:

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};

由于不允许空格，所以我用了_字符.

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

现在，有没有什么方法可以将给定的字符串自动转换为枚举元素，而无需在 C# 中编写循环或一组 if 条件?

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#?

推荐答案

我建议构建一个 Dictionary 来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.

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]; 

或者，如果你想坚持你目前的方法，你可以这样做(我建议不要这样做):

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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