C# Type.GetEnumNames()用法及代碼示例

Type.GetEnumNames()方法用於返回當前枚舉類型的成員的名稱。

用法:

public virtual string[] GetEnumNames ();

返回值：此方法返回一個包含枚舉成員名稱的數組。

異常：如果當前類型不是枚舉，則此方法將提供ArgumentException。

以下示例程序旨在說明上述方法的用法：

示例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); 
        } 
    } 
}

輸出：

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

示例2:對於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); 
        } 
    } 
}

輸出：

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

參考：

https://docs.microsoft.com/en-us/dotnet/api/system.type.getenumnames?view=netframework-4.8

相關用法

注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 C# | Type.GetEnumNames() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。