C＃，BinaryReader，“拉开”二进制文件

Question

I'm trying to use binaryreader to 'pull apart' and index a binary file but I need some help. I got this so far:

using (BinaryReader b = new BinaryReader(File.Open(openRaw.FileName, FileMode.Open)))
                {
                    int pos = 0;
                    // 2A.
                    // Use BaseStream.
                    int length = (int)b.BaseStream.Length;
                    while (pos < length)
                    {


                        //Move on
                        pos += sizeof(int);
                    }
                }

But now the hard part starts, atleast for me.

The file contains byte arrays consisting of 169 bytes seperated by a ! (0x21) character. For each byte array I need to split it into multiple values consisting of 16 and 8 bits. I know the index exactly and it is always the same. Eg: Index 0+1 contains a U16 decimal value being speed, index 16+17 contains a S16 decimal value being pressure. And so on through each array of 169 bytes.

How should I handle this?

EDIT:

I no have this:

FileInfo f = new FileInfo(openRaw.FileName);
                double s1 = Convert.ToDouble(f.Length);
                double s2 = s1 / 170;
                double s3 = Math.Floor(s2);
                double s4 = s3 * 170;

                using (BinaryReader b = new BinaryReader(File.Open(openRaw.FileName, FileMode.Open), Encoding.ASCII))
                {
                    int pos = 0;
                    // 2A.
                    // Use BaseStream.

                    while (pos < s4)
                    {

                         while (b.PeekChar() != -1)
                        {

                            if (b.ReadByte() != 0x21)
                            {
                                flag = 1;
                            }                                

                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            seconds = BitConverter.ToUInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            PW1 = BitConverter.ToUInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            PW2 = BitConverter.ToUInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            RPM = BitConverter.ToUInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            advance = BitConverter.ToInt16(temp, 0);
                            NN = b.ReadBytes(6);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            Baro = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            map = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            mat = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            clt = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            tps = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            bat = BitConverter.ToInt16(temp, 0);
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            AFR = BitConverter.ToInt16(temp, 0);
                            stemp16 = b.ReadInt16();
                            temp = b.ReadBytes(2);
                            Array.Reverse(temp);
                            knock = BitConverter.ToInt16(temp, 0); ;  //33
                            NN = b.ReadBytes(135);

                            table1.Rows.Add((seconds * 0.00390625), RPM, map, (tps * 0.1), ((mat - 320) * 0.05555), ((clt - 320) * 0.05555), (PW1 * 0.000666), (PW2 * 0.000666), (advance * 0.1), (knock * 0.1), (RPM/100), (Baro * 0.1), (AFR * 0.1), (bat * 0.1));

                        }

                        //Move on
                        pos = pos+= sizeof(int);
                    }
                    dataGridView1.DataSource = table1;
                }

Answer 1

Just read the values from the reader in the order they come in the file. Example:

ushort speed = b.ReadUInt16();
byte something = b.ReadByte();
sbyte someOther = b.ReadSByte();
short pressure = b.ReadInt16();

There are BinaryReader methods for reading most data types.

Example of looping the stream:

while (b.PeekChar() != -1) {
  if (b.ReadByte() != 0x21) {
    // error - didn't find valid separator
  }
  ushort speed = b.ReadUInt16();
  // and read another 167 bytes of data
}