实例介绍
【实例简介】比较老的版本了，请用较老的vs打开
【实例截图】
【核心代码】
using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Threading;
namespace SerialAPI
{
/// <summary>
/// SerialPort 的摘要说明。
/// </summary>
public class SerialPort
{
#region 申明要引用的和串口调用有关的API
//win32 api constants
private const uint GENERIC_READ = 0x80000000;
private const uint GENERIC_WRITE = 0x40000000;
private const int OPEN_EXISTING = 3;
private const int INVALID_HANDLE_VALUE = -1;
private const int MAXBLOCK = 4096;
private const uint PURGE_TXABORT = 0x0001; // Kill the pending/current writes to the comm port.
private const uint PURGE_RXABORT = 0x0002; // Kill the pending/current reads to the comm port.
private const uint PURGE_TXCLEAR = 0x0004; // Kill the transmit queue if there.
private const uint PURGE_RXCLEAR = 0x0008; // Kill the typeahead buffer if there.
[StructLayout(LayoutKind.Sequential)]
private struct DCB
{
//taken from c struct in platform sdk
public int DCBlength; // sizeof(DCB)
public int BaudRate; // current baud rate
public int fBinary; // binary mode, no EOF check
public int fParity; // enable parity checking
public int fOutxCtsFlow; // CTS output flow control
public int fOutxDsrFlow; // DSR output flow control
public int fDtrControl; // DTR flow control type
public int fDsrSensitivity; // DSR sensitivity
public int fTXContinueOnXoff; // XOFF continues Tx
public int fOutX; // XON/XOFF out flow control
public int fInX; // XON/XOFF in flow control
public int fErrorChar; // enable error replacement
public int fNull; // enable null stripping
public int fRtsControl; // RTS flow control
public int fAbortOnError; // abort on error
public int fDummy2; // reserved
public ushort wReserved; // not currently used
public ushort XonLim; // transmit XON threshold
public ushort XoffLim; // transmit XOFF threshold
public byte ByteSize; // number of bits/byte, 4-8
public byte Parity; // 0-4=no,odd,even,mark,space
public byte StopBits; // 0,1,2 = 1, 1.5, 2
public char XonChar; // Tx and Rx XON character
public char XoffChar; // Tx and Rx XOFF character
public char ErrorChar; // error replacement character
public char EofChar; // end of input character
public char EvtChar; // received event character
public ushort wReserved1; // reserved; do not use
}
[StructLayout(LayoutKind.Sequential)]
private struct COMMTIMEOUTS
{
public int ReadIntervalTimeout;
public int ReadTotalTimeoutMultiplier;
public int ReadTotalTimeoutConstant;
public int WriteTotalTimeoutMultiplier;
public int WriteTotalTimeoutConstant;
}
[StructLayout(LayoutKind.Sequential)]
private struct OVERLAPPED
{
public int Internal;
public int InternalHigh;
public int Offset;
public int OffsetHigh;
public int hEvent;
}
[StructLayout(LayoutKind.Sequential)]
private struct COMSTAT
{
/*public int fCtsHold;
public int fDsrHold;
public int fRlsdHold;
public int fXoffHold;
public int fXoffSent;
public int fEof;
public int fTxim;
public int fReserved;
public int cbInQue;
public int cbOutQue;*/
// Should have a reverse, i don't know why!!!!!
public int cbOutQue;
public int cbInQue;
public int fReserved;
public int fTxim;
public int fEof;
public int fXoffSent;
public int fXoffHold;
public int fRlsdHold;
public int fDsrHold;
public int fCtsHold;
}
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern int CreateFile(
string lpFileName, // file name
uint dwDesiredAccess, // access mode
int dwShareMode, // share mode
int lpSecurityAttributes, // SD
int dwCreationDisposition, // how to create
int dwFlagsAndAttributes, // file attributes
int hTemplateFile // handle to template file
);
#else
[DllImport("coredll")]
private static extern int CreateFile(
string lpFileName, // file name
uint dwDesiredAccess, // access mode
int dwShareMode, // share mode
int lpSecurityAttributes, // SD
int dwCreationDisposition, // how to create
int dwFlagsAndAttributes, // file attributes
int hTemplateFile // handle to template file
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool GetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll")]
private static extern bool GetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool BuildCommDCB(
string lpDef, // device-control string
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll")]
private static extern bool BuildCommDCB(
string lpDef, // device-control string
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool SetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#else
[DllImport("coredll")]
private static extern bool SetCommState(
int hFile, // handle to communications device
ref DCB lpDCB // device-control block
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool GetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#else
[DllImport("coredll")]
private static extern bool GetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool SetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#else
[DllImport("coredll")]
private static extern bool SetCommTimeouts(
int hFile, // handle to comm device
ref COMMTIMEOUTS lpCommTimeouts // time-out values
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool ReadFile(
int hFile, // handle to file
byte[] lpBuffer, // data buffer
int nNumberOfBytesToRead, // number of bytes to read
ref int lpNumberOfBytesRead, // number of bytes read
ref OVERLAPPED lpOverlapped // overlapped buffer
);
#else
[DllImport("coredll")]
private static extern bool ReadFile(
int hFile, // handle to file
byte[] lpBuffer, // data buffer
int nNumberOfBytesToRead, // number of bytes to read
ref int lpNumberOfBytesRead, // number of bytes read
ref OVERLAPPED lpOverlapped // overlapped buffer
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool WriteFile(
int hFile, // handle to file
byte[] lpBuffer, // data buffer
int nNumberOfBytesToWrite, // number of bytes to write
ref int lpNumberOfBytesWritten, // number of bytes written
ref OVERLAPPED lpOverlapped // overlapped buffer
);
#else
[DllImport("coredll")]
private static extern bool WriteFile(
int hFile, // handle to file
byte[] lpBuffer, // data buffer
int nNumberOfBytesToWrite, // number of bytes to write
ref int lpNumberOfBytesWritten, // number of bytes written
ref OVERLAPPED lpOverlapped // overlapped buffer
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool CloseHandle(
int hObject // handle to object
);
#else
[DllImport("coredll")]
private static extern bool CloseHandle(
int hObject // handle to object
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool ClearCommError(
int hFile, // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
#else
[DllImport("coredll")]
private static extern bool ClearCommError(
int hFile, // handle to file
ref int lpErrors,
ref COMSTAT lpStat
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool PurgeComm(
int hFile, // handle to file
uint dwFlags
);
#else
[DllImport("coredll")]
private static extern bool PurgeComm(
int hFile, // handle to file
uint dwFlags
);
#endif
#if FULLFRAMEWORK
[DllImport("kernel32")]
private static extern bool SetupComm(
int hFile,
int dwInQueue,
int dwOutQueue
);
#else
[DllImport("coredll")]
private static extern bool SetupComm(
int hFile,
int dwInQueue,
int dwOutQueue
);
#endif
#endregion
// SerialPort的成员变量
private int hComm = INVALID_HANDLE_VALUE;
private bool bOpened = false;
public bool Opened
{
get
{
return bOpened;
}
}
/// <summary>
///串口的初始化函数
///lpFileName 端口名
///baudRate 波特率
///parity 校验位
///byteSize 数据位
///stopBits 停止位
/// <summary>
public bool OpenPort(string lpFileName,int baudRate,byte parity, byte byteSize, byte stopBits)
{
// OPEN THE COMM PORT.
hComm = CreateFile(lpFileName ,GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
// IF THE PORT CANNOT BE OPENED, BAIL OUT.
if(hComm == INVALID_HANDLE_VALUE)
{
return false;
}
SetupComm(hComm, MAXBLOCK, MAXBLOCK);
// SET THE COMM TIMEOUTS.
COMMTIMEOUTS ctoCommPort = new COMMTIMEOUTS();
GetCommTimeouts(hComm,ref ctoCommPort);
ctoCommPort.ReadIntervalTimeout = Int32.MaxValue;
ctoCommPort.ReadTotalTimeoutConstant = 0;
ctoCommPort.ReadTotalTimeoutMultiplier = 0;
ctoCommPort.WriteTotalTimeoutMultiplier = 10;
ctoCommPort.WriteTotalTimeoutConstant = 1000;
SetCommTimeouts(hComm,ref ctoCommPort);
// SET BAUD RATE, PARITY, WORD SIZE, AND STOP BITS.
// THERE ARE OTHER WAYS OF DOING SETTING THESE BUT THIS IS THE EASIEST.
// IF YOU WANT TO LATER ADD CODE FOR OTHER BAUD RATES, REMEMBER
// THAT THE ARGUMENT FOR BuildCommDCB MUST BE A POINTER TO A STRING.
// ALSO NOTE THAT BuildCommDCB() DEFAULTS TO NO HANDSHAKING.
DCB dcbCommPort = new DCB();
dcbCommPort.DCBlength = Marshal.SizeOf(dcbCommPort);
GetCommState(hComm, ref dcbCommPort);
dcbCommPort.BaudRate = baudRate;
dcbCommPort.Parity = parity;
dcbCommPort.ByteSize = byteSize;
dcbCommPort.StopBits = stopBits;
SetCommState(hComm, ref dcbCommPort);
PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
bOpened = true;
return true;
}
// 关闭串口
public bool ClosePort()
{
if (hComm == INVALID_HANDLE_VALUE)
{
return false;
}
if (CloseHandle(hComm))
{
hComm = INVALID_HANDLE_VALUE;
bOpened = false;
return true;
}
else
{
return false;
}
}
// 往串口写数据
public bool WritePort(byte[] WriteBytes)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return false;
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
PurgeComm(hComm, PURGE_TXCLEAR | PURGE_TXABORT);
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesWritten = 0;
return WriteFile(hComm, WriteBytes, WriteBytes.Length, ref BytesWritten, ref ovlCommPort);
}
// 从串口读数据
public int ReadPort(int NumBytes, byte[] commRead)
{
if (hComm == INVALID_HANDLE_VALUE)
{
return 0;
}
COMSTAT ComStat = new COMSTAT();
int dwErrorFlags = 0;
ClearCommError(hComm, ref dwErrorFlags, ref ComStat);
if (dwErrorFlags != 0)
{
PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
}
if (ComStat.cbInQue > 0)
{
OVERLAPPED ovlCommPort = new OVERLAPPED();
int BytesRead = 0;
ReadFile(hComm, commRead, NumBytes, ref BytesRead, ref ovlCommPort);
return BytesRead;
}
else
{
return 0;
}
}
}
}
namespace CSharpSerialPort
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.TextBox textBoxReceive;
private System.Windows.Forms.Button button2;
private SerialAPI.SerialPort Serial=new SerialAPI.SerialPort();
bool PortOpen=false;
private System.Windows.Forms.TextBox textBoxSend;
private System.Windows.Forms.Label label1;
private Microsoft.WindowsCE.Forms.InputPanel inputPanel1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.CheckBox checkBox1;
bool Receive=false;
private System.Windows.Forms.Timer timer1;
private char last_key;
private System.Windows.Forms.MenuItem menuItem3;
private System.Windows.Forms.Label label4;
private int loopnum;
private System.Windows.Forms.Label label5;
private int baudRate;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.Label returnnum;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private int delay;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.menuItem2 = new System.Windows.Forms.MenuItem();
this.menuItem3 = new System.Windows.Forms.MenuItem();
this.button1 = new System.Windows.Forms.Button();
this.textBoxReceive = new System.Windows.Forms.TextBox();
this.button2 = new System.Windows.Forms.Button();
this.textBoxSend = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.inputPanel1 = new Microsoft.WindowsCE.Forms.InputPanel();
this.label2 = new System.Windows.Forms.Label();
this.returnnum = new System.Windows.Forms.Label();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.timer1 = new System.Windows.Forms.Timer();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
//
// mainMenu1
//
this.mainMenu1.MenuItems.Add(this.menuItem1);
//
// menuItem1
//
this.menuItem1.MenuItems.Add(this.menuItem2);
this.menuItem1.MenuItems.Add(this.menuItem3);
this.menuItem1.Text = "操作";
//
// menuItem2
//
this.menuItem2.Text = "退出";
this.menuItem2.Click = new System.EventHandler(this.menuItem2_Click);
//
// menuItem3
//
this.menuItem3.Text = "设置串口";
this.menuItem3.Click = new System.EventHandler(this.menuItem3_Click);
//
// button1
//
this.button1.Location = new System.Drawing.Point(88, 184);
this.button1.Size = new System.Drawing.Size(56, 24);
this.button1.Text = "发送";
this.button1.Click = new System.EventHandler(this.button1_Click);
//
// textBoxReceive
//
this.textBoxReceive.Location = new System.Drawing.Point(24, 22);
this.textBoxReceive.Multiline = true;
this.textBoxReceive.Size = new System.Drawing.Size(192, 98);
this.textBoxReceive.Text = "";
//
// button2
//
this.button2.Location = new System.Drawing.Point(8, 184);
this.button2.Size = new System.Drawing.Size(64, 24);
this.button2.Text = "打开";
this.button2.Click = new System.EventHandler(this.button2_Click);
//
// textBoxSend
//
this.textBoxSend.Location = new System.Drawing.Point(24, 152);
this.textBoxSend.Size = new System.Drawing.Size(192, 21);
this.textBoxSend.Text = "01 01 02 06 05 01 09 00 00 25 08 00 00 01 10 66 66 66 66 FF ";
this.textBoxSend.TextChanged = new System.EventHandler(this.textBoxSend_TextChanged);
//
// label1
//
this.label1.Location = new System.Drawing.Point(23, 4);
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.Text = "接收区";
//
// label2
//
this.label2.Location = new System.Drawing.Point(24, 128);
this.label2.Size = new System.Drawing.Size(64, 16);
this.label2.Text = "发送区";
//
// returnnum
//
this.returnnum.Location = new System.Drawing.Point(88, 216);
this.returnnum.Size = new System.Drawing.Size(48, 16);
this.returnnum.Text = "0";
//
// checkBox1
//
this.checkBox1.Location = new System.Drawing.Point(88, 128);
this.checkBox1.Size = new System.Drawing.Size(80, 16);
this.checkBox1.Text = "十六进制";
//
// timer1
//
this.timer1.Interval = 1500;
this.timer1.Tick = new System.EventHandler(this.timer1_Tick);
//
// label4
//
this.label4.Location = new System.Drawing.Point(136, 216);
this.label4.Size = new System.Drawing.Size(48, 16);
this.label4.Text = "label4";
//
// label5
//
this.label5.Location = new System.Drawing.Point(184, 216);
this.label5.Size = new System.Drawing.Size(48, 16);
this.label5.Text = "label5";
//
// label6
//
this.label6.Location = new System.Drawing.Point(40, 216);
this.label6.Size = new System.Drawing.Size(48, 16);
this.label6.Text = "label6";
//
// button3
//
this.button3.Location = new System.Drawing.Point(0, 128);
this.button3.Size = new System.Drawing.Size(24, 16);
this.button3.Text = "button3";
this.button3.Click = new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(152, 184);
this.button4.Size = new System.Drawing.Size(72, 24);
this.button4.Text = "更改设置";
this.button4.Click = new System.EventHandler(this.button4_Click);
//
// Form1
//
this.ClientSize = new System.Drawing.Size(234, 232);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.label6);
this.Controls.Add(this.label5);
this.Controls.Add(this.label4);
this.Controls.Add(this.checkBox1);
this.Controls.Add(this.returnnum);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Controls.Add(this.textBoxSend);
this.Controls.Add(this.button2);
this.Controls.Add(this.textBoxReceive);
this.Controls.Add(this.button1);
this.Menu = this.mainMenu1;
this.MinimizeBox = false;
this.Text = "Form1";
this.Load = new System.EventHandler(this.Form1_Load);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
static void Main()
{
Application.Run(new Form1());
}
private void menuItem2_Click(object sender, System.EventArgs e)
{
Receive=false;
Serial.ClosePort();
this.Close();
}
private void SendCmd()
{
byte[] buf;
textBoxReceive.Text ="";
if(textBoxSend.TextLength==0)
{
return;
}
if(checkBox1.Checked ==true)
{
buf = new byte[(textBoxSend.Text.Length/3)];
for ( int i=0 ; i< (textBoxSend.Text.Length/3); i )
{
buf[i] = byte.Parse( textBoxSend.Text.Substring(i*3 ,2) ,System.Globalization.NumberStyles.AllowHexSpecifier);
}
//com.Output = buf;
}
else
{
buf=new byte [textBoxSend.TextLength];
for(int i=0;i<textBoxSend.TextLength;i )
{
buf[i]=Convert.ToByte(textBoxSend.Text[i]);
}
// byte[] buf=new byte[4];
// buf[0]=200;
// buf[1]=0;
// buf[2]=0;
// buf[3]=200;
}
Serial.WritePort(buf);
}
private void button1_Click(object sender, System.EventArgs e)
{
// for(int i=0;i<5;i )
// {
// SendCmd();
// Sleep(500);
// }
loopnum=0;
timer1.Enabled =true;
timer1.Interval=delay;
}
private void timer1_Tick(object sender, System.EventArgs e)
{
loopnum=loopnum 1;
label6.Text =loopnum.ToString();
if(int.Parse(returnnum.Text)<10 && loopnum<300) //int.Parse(returnnum.Text)<4 &&
{
SendCmd();
}
else
{
returnnum.Text ="0";
timer1.Enabled =false;
}
}
private void button2_Click(object sender, System.EventArgs e)
{
if(!PortOpen)
{
if(Serial.OpenPort("COM1:",baudRate,0,8,1))
{
PortOpen=true;
Receive=true;
ThreadPool.QueueUserWorkItem(new WaitCallback(SerialReceive),0);
button2.Text="关闭";
}
}
else
{
Receive=false;
Serial.ClosePort();
PortOpen=false;
button2.Text="打开";
}
}
public void SerialReceive(Object a)
{
byte [] buf;
buf=new byte [1];
int bytesRead=0;
int i;
while(Receive)
{
if(Serial.Opened)
{
bytesRead=Serial.ReadPort(1,buf);
if(bytesRead>0)
{
for(i=0;i<bytesRead;i )
{
// textBoxReceive.Text =Convert.ToChar(buf[i]).ToString();
textBoxReceive.Text = buf[i].ToString("X2") " ";
}
returnnum.Text = textBoxReceive.Text.Length.ToString();
}
//Application.DoEvents();
}
}
//Thread.Sleep(0);
}
private void textBoxSend_TextChanged(object sender, System.EventArgs e)
{
//
// Hex格式发送数据区输入数据整理：自动用空格间隔每字节的数据
//
// 转换为大写
textBoxSend.Text = textBoxSend.Text.ToUpper();
if ( (textBoxSend.Text.Length % 3) == 2 )
{
if(last_key=='\b')
textBoxSend.Text = textBoxSend.Text.Remove( textBoxSend.Text.Length-1 ,1 );
else
textBoxSend.Text = " ";
}
// 设置插入点到最后面
textBoxSend.SelectionStart = textBoxSend.Text.Length;
}
private void menuItem3_Click(object sender, System.EventArgs e)
{
cResult r = new cResult();
r.TextChanged = new TextChangedHandler(this.EventResultChanged);
frmComSet fc = new frmComSet(r);
fc.ShowDialog();
label4.Text = r.Result1;// "\r\n" r.Result2;
baudRate=int.Parse(r.Result1);
label5.Text = r.Result2;
delay=int.Parse(r.Result2);
}
private void EventResultChanged(string s)
{
label4.Text = s;
}
private void Form1_Load(object sender, System.EventArgs e)
{
baudRate=9600;
delay=1500;
label4.Text = baudRate.ToString();
label5.Text =delay.ToString();
}
private void button3_Click(object sender, System.EventArgs e)
{
// ADOCE.Connection connection;
// Set connection = CreateObject("ADOCE.Connection.3.1")
// connection.ConnectionString = "Data Source=\MyDatabase.cdb"
// connection.Open
}
private void button4_Click(object sender, System.EventArgs e)
{
SendCmd();
}
}
}
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