udpdemodlg.cpp

WinCE下利用UDP和上位机进行网络通讯的例子

// UDPDemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "UDPDemo.h"
#include "UDPDemoDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CUDPDemoDlg dialog

CUDPDemoDlg::CUDPDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CUDPDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CUDPDemoDlg)
	m_strRemoteIP = _T("192.168.10.1");
	m_nLocalPort = 3456;
	m_nRemotePort = 2345;
	m_strRecv = _T("");
	m_strSend = _T("abcdefgh");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CUDPDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CUDPDemoDlg)
	DDX_Text(pDX, IDC_EDIT_IP, m_strRemoteIP);
	DDX_Text(pDX, IDC_EDIT_LPORT, m_nLocalPort);
	DDX_Text(pDX, IDC_EDIT_RPORT, m_nRemotePort);
	DDX_Text(pDX, IDC_EDIT_RECV, m_strRecv);
	DDX_Text(pDX, IDC_EDIT_SEND, m_strSend);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CUDPDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CUDPDemoDlg)
	ON_BN_CLICKED(IDC_BTNOPEN, OnBtnOpen)
	ON_BN_CLICKED(IDC_BTNCLOSE, OnBtnClose)
	ON_BN_CLICKED(IDC_BTNSEND, OnBtnSend)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CUDPDemoDlg message handlers

BOOL CUDPDemoDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CUDPDemoDlg::OnBtnOpen() 
{
	UpdateData(TRUE);
	
	m_CEUdp.m_OnUdpRecv = OnUdpCERecv;
	m_CEUdp.m_OnUdpError = OnUdpCEError;
	
	DWORD nResult = m_CEUdp.Open(this,m_nLocalPort,m_strRemoteIP.GetBuffer(m_strRemoteIP.GetLength()),m_nRemotePort);
	if (nResult <=0) 
	{
		AfxMessageBox(_T("Open Port Failed!"));
	}
	char hostName[255];
	ZeroMemory(hostName, 255);
	gethostname(hostName, 255);
}

void CUDPDemoDlg::OnBtnClose() 
{
	m_CEUdp.Close();	
}

void CUDPDemoDlg::OnBtnSend() 
{
	char * sendBuf;
	int sendLen = 0;
	UpdateData(TRUE);
	
	sendLen = m_strSend.GetLength();
	sendBuf = new char[sendLen];
	WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, m_strSend.GetBuffer(m_strSend.GetLength()),
		                m_strSend.GetLength(),sendBuf,m_strSend.GetLength(),NULL,NULL);
	
	m_CEUdp.SendData(sendBuf, sendLen);	
	delete[] sendBuf;
	sendBuf = NULL;
}

void CALLBACK CUDPDemoDlg::OnUdpCERecv(CWnd * pWnd,char* buf,int nLen,sockaddr * addr)
{
	CUDPDemoDlg * pDlg;
	pDlg = (CUDPDemoDlg*)pWnd;
	char * recvStr = NULL;

	// 接收的数据
	recvStr = new char[nLen];
	ZeroMemory(recvStr, nLen);
	CopyMemory(recvStr,buf,nLen);

	// 显示收到的数据
	CWnd *pRecvStrEdit = (CWnd*)pDlg->GetDlgItem(IDC_EDIT_RECV);
	ASSERT(pRecvStrEdit != NULL);
	CString strRecv = recvStr;
	pRecvStrEdit->SetWindowText(strRecv);

    // 删除动态内存
	delete[] recvStr;
	recvStr = NULL;
}

void CALLBACK CUDPDemoDlg::OnUdpCEError(CWnd * pWnd,int nError)
{
	AfxMessageBox(_T("error!"));
}