C#多维数组迭代 [英] C# multidimensional arrays iteration

问题描述

我是 C# 新手，正在研究数组.

I'm new to C# and looking at arrays.

给定:

int[][] myJagArray = new int[5][];

为什么下面打印 j (System.Int32[]) 的类型，而不是每个 j 的内容?

Why does the following print the types of j (System.Int32[]), and not each j's contents?

foreach (int[] j in myJagArray)
{
    Console.WriteLine("j : {0}",j);
}

推荐答案

因为Array.ToString() 不返回数组内容，而是返回类型名，而Console.WriteLine 对作为参数发送的每个对象隐式调用 ToString().

Because Array.ToString() does not return the contents of the array, it returns the type name, and Console.WriteLine implicitly calls ToString() on each object you send it as a parameter.

这与数组是多维数组的一部分这一事实无关，这只是 CLR 开发人员选择(或者更确切地说，选择不)实现 System.Array 上的 >ToString().

This has no regard to the fact that the array is part of a multi-dimensional array, it is simply the way the CLR developers chose to (or rather, chose not to) implement ToString() on System.Array.

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