在C#中将ushort值转换为两个字节值 [英] Convert a ushort value into two byte values in C#

问题描述

如何在C#中将ushort分成两个字节变量?

How do I split a ushort into two byte variables in C#?

我尝试了以下操作(package.FrameID为ushort):

I tried the following (package.FrameID is ushort):

当我尝试使用纸和铅笔进行计算时，我得到了正确的结果.另外，如果FrameID大于一个字节(因此第二个字节不为零)，则它可以工作.

When I try to calculate this with paper&pencil I get the right result. Also, if FrameID is larger than a byte (so the second byte isn't zero), it works.

array[0] = (byte)(0x0000000011111111 & package.FrameID);
array[1] = (byte)(package.FrameID >> 8);

在我的情况下，package.FrameID为56，array [0]中的结果为16而不是56.

In my case package.FrameID is 56 and the result in array[0] is 16 instead of 56.

我该如何解决?

推荐答案

0x0000000011111111不是二进制数，而是一个十六进制数.您需要改用0x0ff.

0x0000000011111111 is not a binary number, it's a hex number. You need to use 0x0ff instead.

但是，由于结果是一个字节，并且强制转换为一个字节，无论如何都将丢弃高位，因此您实际上不需要and结果.您可以这样做:

However, since the result is a byte and casting to a byte will discard the upper bits anyway, you don't actually need to and the result. You can just do this:

array[0] = (byte)package.FrameID;
array[1] = (byte)(package.FrameID >> 8);

(这是假设您未使用checked代码.如果是，则将大于255的值强制转换为byte将导致异常.您将知道是否正在使用checked代码.)

(That's assuming that you are not using checked code. If you are, then casting a value greater than 255 to a byte will cause an exception. You will know if you are using checked code.)

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