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C# Ascii to Hex Conversion

Posted on 2010-08-18
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Last Modified: 2012-05-10
I have a serial message that I want to convert and re-transmit.

Input is 10 data bytes say..

byte[] bt_message = 0x38,0x38,0x30,0x31,0x30,0x30,0x30,0x31,0x46,0x46

This is equivalent to ASCI '8','8','0','1','0','0','0','1','F','F'


I want to combine these bytes in pairs and resend so I would have output string as 5 bytes...


0x88,0x01,0x00,0x01,0xFF


ie each output byte combined from two input hex bytes.

Any help apreciated.

Thanks
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Question by:oddszone
4 Comments
 

Author Comment

by:oddszone
ID: 33466069
Done it with following...Seems very convoluted but works !




string StrValue = "";
                                byte[] tx_data = new byte[data.Length / 2];

                                for (int nIdx = 0; nIdx < data.Length; nIdx += 2)
                                {
                                    StrValue  = System.Convert.ToChar(System.Convert.ToUInt32(String.Format("{0:x2}", data[nIdx]), 16)).ToString();
                                    StrValue += System.Convert.ToChar(System.Convert.ToUInt32(String.Format("{0:x2}", data[nIdx+1]), 16)).ToString();
                                    tx_data[nIdx / 2] = (byte)(Int32.Parse(StrValue, System.Globalization.NumberStyles.AllowHexSpecifier)); ;

                                }

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Expert Comment

by:jdavistx
ID: 33466088
This seems pretty far from a good solution, but maybe it works?
byte[] input = {0x38,0x38,0x30,0x31,0x30,0x30,0x30,0x31,0x46,0x46};
byte[] output = new byte[5];

for(int i = 0; i < output.Length-1; i++)
	output[i] = Convert.ToByte(((char)input[i]).ToString() + ((char)input[i+1]).ToString());

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Accepted Solution

by:
Meir Rivkin earned 2000 total points
ID: 33466175
byte[] bt_message = new byte[] { 0x38, 0x38, 0x30, 0x31, 0x30, 0x30, 0x30, 0x31, 0x46, 0x46 };            string bytes = Encoding.ASCII.GetString(bt_message);            List newBytes = new List(bytes.Length/2);            for (int i = 0; i < bytes.Length; i+=2)            {                newBytes.Add((byte)Convert.ToInt32(string.Format("{0}{1}", bytes[i], bytes[i + 1]), 16));            }
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