讀取顯示二進位制檔案

要點：

1: byte 數值範圍從0～255

2: "/"　　高8位

   "%"　  低8位

舉例：DEC:206   　　HEX CE

　　    206/16  =12 　  C(hex)

　　　206%16=14　　E(hex)

深入理解二進位制、十六進位制與十進位制的轉換

//using System.IO;
//using System.Windows.Forms;

char[] HexChar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        
 
using (FileStream fs = new FileStream(@"D:\test.txt", FileMode.Open, FileAccess.Read))
        {
            //將檔案以檔案流的形式進行儲存
            using (BinaryReader br = new BinaryReader(fs))
            {
                byte[] IBytes = br.ReadBytes((int)fs.Length); 
                int i=0;
                
 
foreach(byte receivebyte in IBytes)
                {
                    char hexH = HexChar[receivebyte / 16];//高8位
                    char hexL = HexChar[receivebyte % 16];//低8位
                    //Byte:代表無符號的8位整數，數值範圍從0～255
                    MessageBox.Show("Dec: "+receivebyte.ToString()+" Hex: "+(receivebyte).ToString("
 
X2"));
                    Console.Write(hexH.ToString() + hexL.ToString());
                    //Console.Write(receivebyte.Tostring("X2"));
                     if ((i + 1) % 16 == 0)
                    {
                        if (i == 0)
                            continue;
                        Console.WriteLine();
                    }else
                        Console.Write(" ");
                    i++;
                }
            }
            Console.WriteLine();
            Console.WriteLine("讀取完成！");