C#如何判断一个对象是否是多维数组 [英] C# How to check if an object is a multi-dimensional array

问题描述

我是 C# 的新手.我在 C# 中有一个对象，如何检查它是单维数组还是多维数组?

I am a newcomer to C#. I have an Object in C#, how to check if it is an single or multi-dimensional array?

int[,] array = new int[2,3];
object obj = (object) array;
if(obj is Array)
{
    if(obj.Rank==2) // I need to cast obj to array first in order to call Rank
    {
        //do something
    }
}

推荐答案

有两种主要方法可以实现这一点.通过 casting obj 到 Array 如您所建议的:

There are two main ways to accomplish this. Either by casting obj to an Array as you suggested:

if(obj is Array && ((Array)obj).Rank == 2)
{
    //do something
}

或使用 as 运算符:

Or using the as operator:

var arr = obj as Array;
if(arr != null && arr.Rank == 2)
{
    //do something
}

请注意，在这两个解决方案中，我使用 条件 AND 运算符 (&&) 为简单起见.如果左侧评估为 true，这将仅评估右侧.

Note that in both these solutions, I've combined the two if's together using the conditional AND operator (&&) for simplicity. This will only evaluate this right hand side if the left hand side evaluates to true.

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