C# |类型。GetEnumValues()方法

原文:https://www . geesforgeks . org/c-sharp-type-getenumvalues-method/

类型。GetEnumValues()方法用于返回当前枚举类型中常量值的数组。 语法:

public virtual Array GetEnumValues ();

返回值:这个方法返回一个包含值的数组。数组的元素按二进制值排序，即枚举常数的无符号值。 异常:如果当前类型不是枚举，这个方法会给出 ArgumentException 。 以下程序说明了上述方法的使用: 示例 1:

c sharp . c sharp . c sharp . c sharp

// C# program to demonstrate the
// Type.GetEnumValues() 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 instance of enum ABC
            ABC a = ABC.A;

            // Declaring and initializing
            // object of Type
            Type type = a.GetType();

            // Getting an array of the values
            // of the constants
            // By using GetEnumValues() method
            Array obj = type.GetEnumValues();

            // Display values of the constants
            Console.Write("Values of the constants is : {0} ", obj);
        }

        // 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);
        }
    }
}

Output: 

Values of the constants is : GFG+ABC[]

示例 2: 适用于参数异常

c sharp . c sharp . c sharp . c sharp

// C# program to demonstrate the
// Type.GetEnumValues() 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 instance of enum ABC
            ABC a = ABC.A;

            // Declaring and initializing
            // object of Type
            Type type = typeof(int);

            // Getting an array of the values
            // of the constants
            // By using GetEnumValues() method
            Array obj = type.GetEnumValues();

            // Display values of the constants
            Console.Write("Values of the constants is : {0} ", obj);
        }

        // 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);
        }
    }
}

Output: 

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

参考:

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