C#LINQ无法枚举矩阵

Question

我宣布了3 X 3矩阵

int[,] matrix=new int[3,3]
                {
                   {1,2,3},
                   {4,5,6},
                   {11,34,56}
                };

当我试图枚举它时

var diagonal = matrix.AsQueryable().Select();

我很难将它转换为可枚举的集合.如何做到这一点？

Answer 1

矩形数组不实现泛型IEnumerable<T>类型,因此您需要调用Cast<>.例如:

using System;
using System.Collections.Generic;
using System.Linq;

class Test
{
    static void Main()
    {
        int[,] matrix=new int[3,3]
                {
                   {1,2,3},
                   {4,5,6},
                   {11,34,56}
                };

        IEnumerable<int> values = matrix.Cast<int>()
                                        .Select(x => x * x);
        foreach (int x in values)
        {
            Console.WriteLine(x);
        }
    }
}

输出:

1
4
9
16
25
36
121
1156
3136