如何使用 ？枚举中的字符

I work in C#, Visual Studio '05... In my enum, how can I use the '?' character? My enum is below:

我在C#,Visual Studio '05工作......在我的枚举中,我怎么能用'?'字符?我的枚举如下:

public enum Questions
{
    How_old_are_you?_= 0,//How to set the ? character 
    What_is_your_name= 1
}

After I add the '?' character there are some errors.

我添加'?'后字符有一些错误。

6 个解决方案

#1

? isn't a valid character in a C# identifier (including enum values). I strongly suggest you use something like:

?不是C#标识符中的有效字符(包括枚举值)。我强烈建议你使用类似的东西:

public enum Question
{
    [Description("How old are you?")]
    Age,

    [Description("What is your name?")]
    Name
}

Or have a map or a resource file etc - just don't try to make the name of the enum into a natural language description.

或者有地图或资源文件等 - 只是不要试图将枚举的名称变成自然语言描述。

EDIT: For reference, if you want to get at the Description from code, here's how to do it (thanks Christian Hayter):

编辑:作为参考,如果你想从代码中获取描述,这里是如何做到的(感谢Christian Hayter):

((DescriptionAttribute) Attribute.GetCustomAttribute(
    typeof(Question).GetField("Age", BindingFlags.Public | BindingFlags.Static), 
        typeof(DescriptionAttribute), false)
).Description;

#2

You can't. ? is an operator, so a sequence of characters containing it is not a valid identifier.

你不能。 ?是一个运算符,因此包含它的字符序列不是有效的标识符。

#3

You can not use question marks in the enum identifiers. The identifiers in an enumeration follows the same rules as other identifiers.

您不能在枚举标识符中使用问号。枚举中的标识符遵循与其他标识符相同的规则。

You can use the @ character to use reserved keywords as identifiers, but you still can't use characters that are not allowed in an identifier.

您可以使用@字符将保留关键字用作标识符,但仍然不能使用标识符中不允许的字符。

#4

You can add q after the question to make it descriptive. Ex:

您可以在问题后添加q以使其具有描述性。例如:

  How_old_are_you_q= 0,        //Replace ? with q
    What_is_your_name_q= 1

#5

Another possible solution could be a mix between an enum and a dictionary :

另一种可能的解决方案可能是枚举和字典之间的混合:

public enum Question
{
  Age,
  Name
}

...

Dictionary<Question,string> Questions = new Dictionary<Question,string>();

Questions.Add(Question.Age,  "How old are you ?");
Questions.Add(Question.Name, "What is your name ?");

#6

You can tag your Enum items with underscore characters, which are allowed in Enum, and replace them for display.

您可以使用下划线字符标记Enum项目,这些字符在Enum中是允许的,并替换它们以供显示。

Eg Binding an Enum to a ComboBox, say, replacing first "__" with "?", then "_" with space Enum item How_old_are_you__ becomes ComboBox item "How old are you?"

例如,将枚举绑定到ComboBox,例如,将第一个“__”替换为“?”,然后将“_”替换为空格枚举项目How_old_are_you__变为ComboBox项目“你多大了?”

I use this when I want to stick with Enum over other options. It works well for partially loading Enum items into lists and display controls as well.

当我想坚持使用Enum而不是其他选项时,我会使用它。它适用于将Enum项目部分加载到列表和显示控件中。