Enum转string

将一个枚举类型的值转换为字符串类型可以通过以下两种方式实现：

1. 使用枚举类型的ToString()方法

每个枚举类型都有一个ToString()方法，可以将枚举值转换为对应的字符串。例如：

enum WeekDay { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday };

WeekDay day = WeekDay.Monday;
string dayString = day.ToString();  // "Monday"

2. 使用类型转换操作符

可以使用类型转换操作符将枚举值转换为int类型，然后将int类型转换为字符串类型。例如：

enum WeekDay { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday };

WeekDay day = WeekDay.Monday;
string dayString = ((int)day).ToString();  // "0"

需要注意的是，如果枚举类型定义了字符串常量，可以使用字符串常量来表示枚举值，例如：

enum WeekDay { Monday = 1, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday };

WeekDay day = WeekDay.Monday;
string dayString = day.ToString();  // "Monday"

WeekDay friday = WeekDay.Friday;
string fridayString = friday.ToString();  // "Friday"

WeekDay saturday = WeekDay.Saturday;
string saturdayString = saturday.ToString();  // "Saturday"