c#

Question

   我想用C#完成二进制文件的读取.数据结构如下怎么能实现.谢谢
字段1   字段2          字段3 字段4       字段5 字段6
车台ID码 GPS方向数据 指令码 车台状态字  发送时间 GPS时间和定位数据
2字节    1字节          1字节 2字节     3字           1 0字节
   

Answer 1

byte[] buf = {
                 1,0,
                 2,
                 3,  
                 4,0,
                 5,0,0,                         // 3 bytes
                 6,5,4,3,2,  6,5,4,3,2          // 10 bytes
             };short id = BitConverter.ToInt16(buf, 0);        // 1
byte gpsDir = buf[2];                           // 2
byte instruction = buf[3];                      // 3
short status = BitConverter.ToInt16(buf, 4);    // 4byte[] location = new byte[10];
Array.Copy(buf, 9, location, 0, 10);
buf[9] = 0;int sendTime = BitConverter.ToInt32(buf, 6);    // 5

Answer 2

参考下msdn// Create default application settings.
        aspectRatio   = 1.3333F;
        lookupDir     = @"C:\AppDirectory";
        autoSaveTime  = 30;
        showStatusBar = false;        if(File.Exists(fileName))
        {
            BinaryReader binReader =
                new BinaryReader(File.Open(fileName, FileMode.Open));
            try
            {
                // If the file is not empty,
                // read the application settings.
                // Read 4 bytes into a buffer to
                // determine if the file is empty.
                byte[] testArray = new byte[3];
                int count = binReader.Read(testArray, 0, 3);                if (count != 0)
                {
                    aspectRatio   = binReader.ReadSingle();
                    lookupDir     = binReader.ReadString();
                    autoSaveTime  = binReader.ReadInt32();
                    showStatusBar = binReader.ReadBoolean();
                }
            }            // If the end of the stream is reached before reading
            // the four data values, ignore the error and use the
            // default settings for the remaining values.
            catch(EndOfStreamException e)
            {
                Console.WriteLine("{0} caught and ignored. " +
                    "Using default values.", e.GetType().Name);
            }
            finally
            {
                binReader.Close();
            }
        }// Create a file and store the application settings.
    public void Close()
    {
        using(BinaryWriter binWriter =
            new BinaryWriter(File.Open(fileName, FileMode.Create)))
        {
            binWriter.Write(aspectRatio);
            binWriter.Write(lookupDir);
            binWriter.Write(autoSaveTime);
            binWriter.Write(showStatusBar);
        }
    }