C# Array.GetEnumerator用法及代码示例

此方法用于返回数组的IEnumerator。

用法:

public System.Collections.IEnumerator GetEnumerator ();

返回值：此方法返回数组的IEnumerator。

以下示例程序旨在说明Array.GetEnumerator方法的用法：

示例1:

// C# program to demonstrate 
// GetEnumerator() method 
using System; 
using System.Collections; 
using System.Collections.Generic; 
  
public class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // Creating and intializing new the String 
        String[] myArr = {"Sun", "Mon", "Tue", "Thu"}; 
  
        // Display the values of the myArr. 
        Console.Write("Initial Array: "); 
  
        // calling the PrintIndexAndValues() 
        // method to print 
        PrintIndexAndValues(myArr); 
  
        // getting the IEnumerator for the myArr 
        IEnumerator myEnumerator = myArr.GetEnumerator(); 
  
        // calling the PrintIndexAndValues() 
        // method to print 
        Console.WriteLine("Enumerated value: "); 
        PrintIndexAndValues(myEnumerator); 
    } 
  
    // Defining the method 
    // PrintIndexAndValues 
    public static void PrintIndexAndValues(String[] myArr) 
    { 
        for (int i = 0; i < myArr.Length; i++) { 
  
            Console.Write("{0} ", myArr[i]); 
        } 
        Console.WriteLine(); 
        Console.WriteLine(); 
    } 
  
    // Overriding the method 
    // PrintIndexAndValues 
    public static void PrintIndexAndValues(IEnumerator myEnumerator) 
    { 
        int i = 0; 
        while ((myEnumerator.MoveNext()) &&  
          (myEnumerator.Current != null)) { 
  
            Console.WriteLine("[{0}] {1}", i++, 
                         myEnumerator.Current); 
        } 
    } 
}

输出：

Initial Array: Sun Mon Tue Thu 

Enumerated value: 
[0] Sun
[1] Mon
[2] Tue
[3] Thu

示例2:

// C# program to demonstrate 
// GetEnumerator() method 
// For int value 
using System; 
using System.Collections; 
using System.Collections.Generic; 
  
public class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // Creating and intializing new the int 
        int[] myArr = {10, 20, 30, 40}; 
  
        // Display the values of the myArr. 
        Console.Write("Initial Array: "); 
  
        // calling the PrintIndexAndValues() 
        // method to print 
        PrintIndexAndValues(myArr); 
  
        // getting the IEnumerator for the myArr 
        IEnumerator myEnumerator = myArr.GetEnumerator(); 
  
        // calling the PrintIndexAndValues() 
        // method to print 
        Console.WriteLine("Enumerated value: "); 
        PrintIndexAndValues(myEnumerator); 
    } 
  
    // Defining the method 
    // PrintIndexAndValues 
    public static void PrintIndexAndValues(int[] myArr) 
    { 
        for (int i = 0; i < myArr.Length; i++) { 
  
            Console.Write("{0} ", myArr[i]); 
        } 
        Console.WriteLine(); 
        Console.WriteLine(); 
    } 
  
    // Overriding the method 
    // PrintIndexAndValues 
    public static void PrintIndexAndValues(IEnumerator myEnumerator) 
    { 
        int i = 1; 
        while ((myEnumerator.MoveNext()) &&  
          (myEnumerator.Current != null)) { 
  
            Console.WriteLine("{0}> {1} ", i++,  
                          myEnumerator.Current); 
        } 
    } 
}

输出：

Initial Array: 10 20 30 40 

Enumerated value: 
1> 10 
2> 20 
3> 30 
4> 40

参考：

https://docs.microsoft.com/en-us/dotnet/api/system.array.getenumerator?view=netframework-4.7.2

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 C# | Array.GetEnumerator Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。