using System;
using System
.Collections
.Generic;
using System
.Linq;
using System
.Text;
using System
.IO
.Ports;
using System
.Windows
.Forms;
namespace SComm
{
public class Com
{
private
SerialPort sport;
/// <summary>
/// 设置发送缓冲区大小
/// </summary>
public int outBufferSize
{
set
{
sport
.WriteBufferSize = value;
}
}
/// <summary>
/// 设置接收缓冲区大小
/// </summary>
public int inBufferSize
{
set
{
sport
.ReadBufferSize = value;
}
}
public Com()
{
sport = new
SerialPort();
}
/// <summary>
/// 初始化
/// </summary>
/// <param name="portName">端口名称</param>
/// <param name="rate">波特率</param>
/// <param name="parity">校验方式</param>
public Com(string portName,int rate,Parity parity)
{
sport = new
SerialPort(portName,rate,parity);
}
public bool InitCom()
{
if (sport
.IsOpen)
return true;
else
{
try
{
sport
.Open();
return true;
}
catch (Exception e)
{
return false;
}
}
}
public void Close()
{
if (sport
.IsOpen)
sport
.Close();
}
/// <summary>
///
串口设置并打开
/// </summary>
/// <param name="portName"></param>
/// <param name="rate"></param>
/// <param name="parity"></param>
/// <returns></returns>
public bool InitCom(string portName, int rate, Parity parity)
{
if (sport
.IsOpen)
sport
.Close();
sport
.BaudRate = rate;
sport
.PortName = portName;
sport
.Parity = parity;
try
{
sport
.Open();
return true;
}
catch (Exception e)
{
return false;
}
}
/// <summary>
/// 发送字节
/// </summary>
/// <param name="writeBytes">要发送的字节</param>
/// <param name="count">发送字节的数量</param>
/// <returns></returns>
public bool write(byte[] writeBytes,int count)
{
if (InitCom())
{
try
{
sport
.Write(writeBytes, 0, count);
return true;
}
catch (Exception e)
{
return false;
}
}
return false;
}
/// <summary>
/// 发送字符串
/// </summary>
/// <param name="writestrs"></param>
/// <returns></returns>
public bool write(string writeStrs)
{
if (InitCom())
{
try
{
sport
.Write(writeStrs);
System
.Th
reading
.Th
read.Sleep(100);
return true;
}
catch
{
return false;
}
}
return false;
}
/// <summary>
///
读取数据
/// </summary>
/// <param name="NumBytes">
读取的字节数</param>
/// <returns></returns>
public byte[]
Read(int NumBytes)
{
byte[] inbuffer=null;
if (sport
.IsOpen && sport
.BytesTo
Read > 0)
{
if (NumBytes > sport
.BytesTo
Read)
NumBytes = sport
.BytesTo
Read;
try
{
int b = sport
.ReadByte();
string s = sport
.ReadExisting();
string s1 = sport
.NewLine;
// string ss = sport
.ReadLine();
inbuffer = new byte[NumBytes];
int count = sport
.Read(inbuffer, 0, NumBytes);
}
catch (TimeoutException) { throw; }
}
// sport
.Close();
return inbuffer;
}
public byte[]
Read()
{
return
Read(sport
.BytesTo
Read);
}
public string
ReadLine()
{
try
{
if (sport
.IsOpen && sport
.BytesTo
Read > 0)
{
string s = sport
.ReadExisting();
return sport
.ReadLine();
}
return null;
}
catch (TimeoutException e)
{
return e
.Message;
}
}
public string
ReadExisting()
{
return sport
.ReadExisting();
}
public void SendSignal(byte cmd)
{
byte[] hexdata = new byte[5];
hexdata[0] = 0x01;
hexdata[1] = 0x03;
hexdata[2] = cmd;
ushort crc = CommWithARM
. CRC_16(hexdata, 3);
hexdata[3] = (byte)(crc / 256);
hexdata[4] = (byte)(crc % 256);
write(hexdata, 5);
}
public void OnOnCommMscomm1()
{
byte[] rxdata=
Read();
////string srxdata =
ReadLine(); int i = 0; try
////{
//// foreach (char s in srxdata)
//// {
//// rxdata[i++] = (byte)s;
//// }
////}
////catch { }
if (rxdata != null)
{
int len = rxdata
.Length;
if (len == 23)
{
CommWithARM
.CheckHandSignal(rxdata);
}
else if (len >= 53)
{
CommWithARM
.HandData(rxdata, len);
}
}
}
}
}
C# 串口通信：解决ReadLine方法不完整读取问题
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本文介绍了在使用C#编写串口上位机程序时遇到的Read方法无法整行读取的问题及解决方案。通过参考多个资料，对原始代码进行调整，实现了完整读取串口数据的功能。
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