C＃| Type.GetEnumNames()方法

Type.GetEnumNames()方法用于返回当前枚举类型的成员的名称。

句法：

public virtual string[] GetEnumNames ();

返回：此方法返回一个包含枚举成员名称的数组。

异常：如果当前类型不是枚举，则此方法将提供ArgumentException。

下面的程序说明了上述方法的用法：

范例1：

// C# program to demonstrate the
// Type.GetEnumNames(Object) Method
using System;
using System.Globalization;
using System.Reflection;
  
class GFG {
  
    // Defining enum ABC
    enum ABC { A,
               B,
               C,
               D,
               E,
               F }
  
    // Main Method
    public static void Main()
    {
  
        // try-catch block to
        // handle exceptions
        try {
  
            // Creating and initializing object
            // of ABC with instace of enum ABC
            ABC a = ABC.A;
  
            // Declaring and initializing
            // object of Type
            Type type = a.GetType();
  
            // Getting Array of constants
            // By using GetEnumNames() method
            string[] obj = type.GetEnumNames();
  
            // Display Array obj
            Console.WriteLine("The constants are as follow :-");
            for (int i = 0; i < obj.Length; i++)
                Console.Write("{0} ", obj[i]);
        }
  
        // catch ArgumentException here
        catch (ArgumentException e)
        {
            Console.Write("The current type is not an enumeration.");
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

输出：

The constants are as follow :-
A B C D E F

示例2：对于ArgumentException

// C# program to demonstrate the
// Type.GetEnumNames(Object) Method
using System;
using System.Globalization;
using System.Reflection;
  
class GFG {
  
    // Defining enum ABC
    enum ABC { A,
               B,
               C,
               D,
               E,
               F }
  
    // Main Method
    public static void Main()
    {
  
        // Creating try-catch block
        // to handle exceptions
        try {
  
            // Declaring and initializing
            // object of Type
            Type type = typeof(int);
  
            // Getting Array of constants
            // By using GetEnumNames() method
            string[] obj = type.GetEnumNames();
  
            // Display Array obj
            Console.WriteLine("The constants are as follow :-");
            for (int i = 0; i < obj.Length; i++)
                Console.Write("{0} ", obj[i]);
        }
  
        // catch ArgumentException here
        catch (ArgumentException e) 
        {
            Console.WriteLine("The current type is not an enumeration.");
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

输出：

The current type is not an enumeration.
Exception Thrown: System.ArgumentException

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.type.getenumnames?view=netframework-4.8