C# 从字节数组中获取第一个字节索引

Question

I have a byte Array that contains the char '%' (25 hex, 37 decimal). I would like to get the index of this byte, however, none of these methods work, and -1 is returned. How to get the index of a specific byte in a byte array?

int byteIndex = Array.IndexOf(bytesDataArray, '%');
int byteIndex = Array.IndexOf(bytesDataArray, 37);
int byteIndex = Array.IndexOf(bytesDataArray, 0x25);

Answer 1

You're trying to find an int value of 37 in a byte array. Byte arrays don't contain ints. You need to do a type cast:

int byteIndex = Array.IndexOf(bytesDataArray, (byte)37);