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如何在C#中查找数组的长度?

Array.Length属性用于获取数组所有维度中元素的总数。基本上, 数组的长度是该数组所有维度所包含的元素总数。

语法如下:

public int Length { get; }

适当的价值:此属性返回数组所有维度中的元素总数。如果数组中没有元素, 它也可以返回零。返回类型为System.Int32.

例外:此属性引发OverflowException如果数组是多维数组, 并且包含多个最大价值 元素。这里MaxValue是2147483647。

下面的程序说明了上面讨论的属性的用法:

示例1:

//C# program to find the
//the total number of
//elements in 1-D Array
using System;
namespace srcmini {
  
class GFG {
  
     //Main Method
     public static void Main()
     {
  
         //declares a 1D Array of string.
         string [] weekDays;
  
         //allocating memory for days.
         weekDays = new string [] { "Sun" , "Mon" , "Tue" , "Wed" , "Thu" , "Fri" , "Sat" };
  
         //Displaying Elements of the array
         foreach ( string day in weekDays)
             Console.Write(day + " " );
  
         Console.Write( "\nTotal Number of Elements: " );
  
         //using Length property
         Console.Write(weekDays.Length);
     }
}
}

输出如下:

Sun Mon Tue Wed Thu Fri Sat 
Total Number of Elements: 7

示例2:

//C# program to find the total
//number of elements in the
//multidimensional Arrays
using System;
namespace srcmini {
  
class GFG {
  
     //Main Method
     public static void Main()
     {
  
         //Two-dimensional array
         int [, ] intarray = new int [, ] {{1, 2}, {3, 4}, {5, 6}, {7, 8}};
  
         //The same array with dimensions
         //specified 4 row and 2 column.
         int [, ] intarray_d = new int [4, 2] {{ 1, 2}, {3, 4}, {5, 6}, {7, 8}};
  
         //Three-dimensional array.
         int [, , ] intarray3D = new int [, , ] {{{ 1, 2, 3}, { 4, 5, 6}}, {{ 7, 8, 9}, {10, 11, 12}}};
  
         //The same array with dimensions
         //specified 2, 2 and 3.
         int [, , ] intarray3Dd = new int [2, 2, 3] {{{1, 2, 3}, {4, 5, 6}}, {{ 7, 8, 9}, {10, 11, 12}}};
  
         Console.Write( "Total Number of Elements in intarray: " );
  
         //using Length property
         Console.Write(intarray.Length);
  
         Console.Write( "\nTotal Number of Elements in intarray_d: " );
  
         //using Length property
         Console.Write(intarray_d.Length);
  
         Console.Write( "\nTotal Number of Elements in intarray3D: " );
  
         //using Length property
         Console.Write(intarray3D.Length);
  
         Console.Write( "\nTotal Number of Elements in intarray3Dd: " );
  
         //using Length property
         Console.Write(intarray3Dd.Length);
     }
}
}

输出如下:

Total Number of Elements in intarray: 8
Total Number of Elements in intarray_d: 8
Total Number of Elements in intarray3D: 12
Total Number of Elements in intarray3Dd: 12

参考:

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

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