遍历C#中字节的所有位 [英] Iterate over all bits of byte in C#

问题描述

我正在开发C#应用程序.我有一个字节变量，我想遍历它的所有位.

I am working on a C# application. I have a byte variable, i want to iterate over all bits of it.

byte var = 3;
System.Collections.BitArray bits = new System.Collections.BitArray(var);
Console.WriteLine("Length of collection : " + bits.Length);
for (int i = 0; i < bits.Length; i++)
{
    Console.WriteLine(bits[i]);
}

这段代码为我提供了以下输出:

This code gives me the following output:

Length of collection : 3
False
False
False

但是由于3的二进制表示形式是00000011，所以我期望以下输出

But as the binary representation of 3 is 00000011 so i expect the following output

False
False
False
False
False
False
True
True

我在做什么错?我如何获得所需的输出

What am i doing wrong ? How can i achieve the required output

推荐答案

您正在呼叫

You're calling the BitArray(int length) constructor:

初始化BitArray类的新实例，该实例可以保存指定数量的位值，这些位值最初设置为false.

Initializes a new instance of the BitArray class that can hold the specified number of bit values, which are initially set to false.

因此，您正在创建长度为3的BitArray，而不是包含整数值3中的位的BitArray.

So you're creating a BitArray of length 3, not a BitArray which contains the bits from the integer value 3.

您需要

You want the BitArray(byte[] bytes) constructor:

初始化BitArray类的新实例，该实例包含从指定的字节数组复制的位值.

Initializes a new instance of the BitArray class that contains bit values copied from the specified array of bytes.

byte var = 3;
BitArray bits = new BitArray(new byte[] { var });
Console.WriteLine("Length of collection : " + bits.Length);
for (int i = 0; i < bits.Length; i++)
{
    Console.WriteLine(bits[i]);
}

输出:

Length of collection : 8
True
True
False
False
False
False
False
False

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