c# com通讯类 用的是 SerialPort 类

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.IO.Ports; 
using System.ComponentModel; 
using System.Threading; 
  
namespace Cserver 
{ 
    class ToCom 
    { 
        priva

using System; using System.Collections.Generic; using System.Text; using System.IO.Ports; using System.ComponentModel; using System.Threading;   namespace Cserver {     class ToCom     {         private System.IO.Ports.SerialPort serialPort1 = new SerialPort();         public delegate byte[] getDate(byte[] bts);         private getDate mygetDate;         private string com;           public ToCom(string com)         {             this.com = com;             serialPort1.PortName = com;  //端口号             serialPort1.BaudRate = 9600;   //比特率             serialPort1.Parity = Parity.None;//奇偶校验             serialPort1.StopBits = StopBits.One;//停止位             serialPort1.ReadTimeout = 1000; //读超时，即在1000内未读到数据就引起超时异常        }        #region 发送接收数据         public void SendMsg(string senStr)         {                         serialPort1.Open();               byte[] myByte = StringToByte_2(senStr);               serialPort1.Write(myByte, 0, myByte.Length);             serialPort1.Close();           }         public string  ReadMsg()         {             serialPort1.Open();             string rd="null ";             #region 读数据老方法             ////------------mothed1----             //int i = serialPort1.ReadBufferSize;            // byte[] data = Convert.FromBase64String(serialPort1.ReadLine());                           // rd = Encoding.Unicode.GetString(data);             // //  mothed2             //int DataLength = serialPort1.BytesToRead;               //int i = 0;               //StringBuilder sb = new StringBuilder();               //while (i  < DataLength)             //{               //    byte[] ds = new byte[1024];               //    int len = serialPort1.Read(ds, 0, 1024);               // //   sb.Append(Encoding.ASCII.GetString(ds, 0, len));             //    sb.Append(ByteToString(ds));               //    i += len;               //}             // //  mothed2             //byte[] data= new byte[serialPort1.BytesToRead];             //int i = serialPort1.Read(data, 0, serialPort1.BytesToRead);                         //rd = ByteToString(data);                      #endregion               //  mothed3             byte[] data = new byte[serialPort1.BytesToRead];             int i = serialPort1.Read(data, 0, serialPort1.BytesToRead);               rd = ByteToString(data);             return rd;           }        // string getdate(byte[])           public  void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)         {             byte[] readBuffer = new byte[serialPort1.ReadBufferSize];             serialPort1.Read(readBuffer, 0, readBuffer.Length);             //this.Invoke(interfaceUpdataHandle, new string[] { Encoding.UTF8.GetString(readBuffer) });              // this.Invoke(interfaceUpdataHandle, new string[] { ToCom.ByteToString(readBuffer) });             string s = ToCom.ByteToString(readBuffer);                      }        #endregion           ///  <summary>         /// 串口读(非阻塞方式读串口，直到串口缓冲区中没有数据         ///  </summary>         ///  <param name="readBuf">串口数据缓冲 </param>         ///  <param name="bufRoom">串口数据缓冲空间大小 </param>         ///  <param name="HowTime">设置串口读放弃时间 </param>         ///  <param name="ByteTime">字节间隔最大时间 </param>         ///  <returns>串口实际读入数据个数 </returns>         public int ReadComm(out Byte[] readBuf, int bufRoom, int HowTime, int ByteTime)         {             //throw new System.NotImplementedException();             readBuf = new Byte[64];             Array.Clear(readBuf, 0, readBuf.Length);               int nReadLen, nBytelen;             if (serialPort1.IsOpen == false)                 return -1;             nBytelen = 0;             serialPort1.ReadTimeout = HowTime;                 try             {                 readBuf[nBytelen] = (byte)serialPort1.ReadByte();                 byte[] bTmp = new byte[1023];                 Array.Clear(bTmp, 0, bTmp.Length);                   nReadLen = ReadBlock(out bTmp, bufRoom - 1, ByteTime);                   if (nReadLen > 0)                 {                     Array.Copy(bTmp, 0, readBuf, 1, nReadLen);                     nBytelen = 1 + nReadLen;                   }                   else if (nReadLen == 0)                     nBytelen = 1;             }             catch (Exception ex)             {                 throw new Exception(ex.Message);                            }               return nBytelen;         }         ///  <summary>         /// 串口同步读(阻塞方式读串口，直到串口缓冲区中没有数据,靠字符间间隔超时确定没有数据)         ///  </summary>         ///  <param name="ReadBuf">串口数据缓冲 </param>         ///  <param name="ReadRoom">串口数据缓冲空间大小 </param>         ///  <param name="ByteTime">字节间隔最大时间 </param>         ///  <returns>从串口实际读入的字节个数 </returns>         public int ReadBlock(out byte[] ReadBuf, int ReadRoom, int ByteTime)         {             //throw new System.NotImplementedException();             ReadBuf = new byte[1024];             Array.Clear(ReadBuf, 0, ReadBuf.Length);               sbyte nBytelen;             //long nByteRead;               if (serialPort1.IsOpen == false)                 return 0;             nBytelen = 0;             serialPort1.ReadTimeout = ByteTime;               while (nBytelen  < (ReadRoom - 1))             {                 try                 {                     ReadBuf[nBytelen] = (byte)serialPort1.ReadByte();                     nBytelen++; // add one                 }                 catch (Exception ex)                 {                      throw new Exception( ex.Message);                     break;                 }             }             ReadBuf[nBytelen] = 0x00;             return nBytelen;           }             ///  <summary>         /// 字符数组转字符串16进制         ///  </summary>         ///  <param name="InBytes"> 二进制字节 </param>         ///  <returns>类似"01 02 0F" </returns>         public static string ByteToString(byte[] InBytes)         {             string StringOut = "";             foreach (byte InByte in InBytes)             {                 StringOut = StringOut + String.Format("{0:X2}", InByte) + " ";             }               return StringOut.Trim();         }         ///  <summary>         /// strhex 转字节数组         ///  </summary>         ///  <param name="InString">类似"01 02 0F" 用空格分开的  </param>         ///  <returns> </returns>         public static byte[] StringToByte(string InString)         {             string[] ByteStrings;             ByteStrings = InString.Split(" ".ToCharArray());             byte[] ByteOut;             ByteOut = new byte[ByteStrings.Length];             for (int i = 0; i  <= ByteStrings.Length - 1; i++)             {                 ByteOut[i] = byte.Parse(ByteStrings[i], System.Globalization.NumberStyles.HexNumber);             }             return ByteOut;         }           ///  <summary>         /// strhex 转字节数组         ///  </summary>         ///  <param name="InString">类似"01 02 0F" 中间无空格 </param>         ///  <returns> </returns>         public static byte[] StringToByte_2(string InString)         {             byte[] ByteOut;             InString = InString.Replace(" ","");             try             {                 string[] ByteStrings = new string[InString.Length/2];                 int j = 0;                 for (int i = 0; i  < ByteStrings.Length ; i++)                 {                                          ByteStrings[i] = InString.Substring(j,2);                     j += 2;                 }                                 ByteOut = new byte[ByteStrings.Length];                 for (int i = 0; i  <= ByteStrings.Length - 1; i++)                 {                     ByteOut[i] = byte.Parse(ByteStrings[i], System.Globalization.NumberStyles.HexNumber);                 }             }             catch (Exception ex)             {                                  throw new Exception(ex.Message);             }               return ByteOut;         }         ///  <summary>         /// 字符串 转16进制字符串         ///  </summary>         ///  <param name="InString">unico </param>         ///  <returns>类似“01 0f” </returns>         public static string  Str_To_0X(string InString)         {             return ByteToString (UnicodeEncoding.Default.GetBytes(InString));         }     } }