[RESOLVED] [Code proposal] Convert byte array in ASCII to int

[Erendar]

Hello,

This converts ASCII data to the equivalent int as if we had converted the string into the meaning int.
Comments and feedback appreciated, thanks !

        public int iByteArrayASCIIToInt(byte[] bTable, int iStart, int iEnd)
        {
            int retval;
            int i;
            int iNumberOfElements;
            iNumberOfElements = iEnd - iStart;
            retval = 0;
            for (i = 0; i <= iNumberOfElements; i++)
            {
                retval += (bTable[iStart + i] - 0x30) * (int)Math.Pow(10, iNumberOfElements - i);
            }
            return retval;
        }

[BioPhysEngr]

Using the internal libraries, you can do it quicker:

string asciiString = System.Text.Encoding.ASCII.getString(bTable);
return Int32.Parse(asciiString);

[Erendar]

Thanks

[Erendar]

Hello again people, this time i had a file with hex values typped in ASCII but i needed them in byte array so I made this. Any feedback is appreciated

        
private byte castASCIIByte(byte b1,byte b2)
        {
            byte retval;
            retval = 0;

            if ((b1 > 0x2F)&&(b1<0x3A))
            {
                retval =(byte) ((b1 - 0x30) * 16);
            }
            else if ((b1 > 0x40) && (b1 < 0x47))
            {
                retval = (byte)((b1 - 55) * 16);
            }
            else if ((b1 > 0x60) && (b1 < 0x67))
            {
                retval = (byte)((b1 - 87) * 16);
            }

            if ((b2 > 0x2F) && (b2 < 0x3A))
            {
                retval += (byte)(b2 - 0x30);
            }
            else if ((b2 > 0x40) && (b2 < 0x47))
            {
                retval += (byte)(b2 - 55);
            }
            else if ((b2 > 0x60) && (b2 < 0x67))
            {
                retval += (byte)(b2 - 87);
            }
            return retval;
        }

[DataMiser]

If it is a file and you need to get it into a byte array the simple way is to just read it into a byte array.

create a filestream pointed to the file
create a binaryreader pointed to the file stream
using the binaryreader readallbytes

[Cimperiali]

Do believe we could keep these two related.

[curt_c]

Hi,

You can use the Convert Class and the BitConverter classes

int checkVal;

checkVal = Convert.ToInt16(String.Format("{0:F0}", pageByte), 16) ; //base 16
checkVal = Convert.ToInt16(String.Format("{0:F0}", lsb), 10); //base 10

Trace.WriteLine("Checkval = " + checkVal);

int checkSum;
                              
checkSum = 256 - checkVal;
strcheckSum = BitConverter.ToString(BitConverter.GetBytes(checkSum));

Curt

[Erendar]

Thanks for your comments

What I was looking for is for that :
1) I have a file like this
"F662A4"
Means that in hex the file is like this :
00000000h: 46 36 36 32 41 34 ; F662A4
2) What i wanted is a byte[3] to look like this
byte[0] = F6
byte[1] = 62
byte[2] = A4

[BioPhysEngr]

You can parse them like this:

string hexString = "F4";
byte parsed = Byte.Parse(hexString, System.Globalization.NumberStyles.HexNumber);

//Parsed now contains 0xF4 (=244)

This is based on the MSDN article showing how to do it for int (see link), but I verified it works for byte as well.

[Erendar]

Yay thanks, helps me a lot