winsockudpdlg.cpp

编程实例

// WinSockUDPDlg.cpp : implementation file
//

#include "stdafx.h"
#include "WinSockUDP.h"
#include "WinSockUDPDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWinSockUDPDlg dialog

CWinSockUDPDlg::CWinSockUDPDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CWinSockUDPDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CWinSockUDPDlg)
	m_strChat = _T("");
	m_strData = _T("");
	m_iLPort = 1001;
	m_strName = _T("");
	m_iSPort = 1001;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CWinSockUDPDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWinSockUDPDlg)
	DDX_Control(pDX, IDC_Exit, m_btnExit);
	DDX_Control(pDX, IDC_ServPort, m_ctlSPort);
	DDX_Control(pDX, IDC_ServName, m_ctlName);
	DDX_Control(pDX, IDC_Send, m_btnSend);
	DDX_Control(pDX, IDC_Open, m_btnOpen);
	DDX_Control(pDX, IDC_LocalPort, m_ctlLPort);
	DDX_Control(pDX, IDC_DisConn, m_btnDisConn);
	DDX_Control(pDX, IDC_Data, m_ctlData);
	DDX_Control(pDX, IDC_Clear, m_btnClear);
	DDX_Control(pDX, IDC_Chat, m_lstChat);
	DDX_LBString(pDX, IDC_Chat, m_strChat);
	DDX_Text(pDX, IDC_Data, m_strData);
	DDX_Text(pDX, IDC_LocalPort, m_iLPort);
	DDX_Text(pDX, IDC_ServName, m_strName);
	DDX_Text(pDX, IDC_ServPort, m_iSPort);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CWinSockUDPDlg, CDialog)
	//{{AFX_MSG_MAP(CWinSockUDPDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CLOSE()
	ON_BN_CLICKED(IDC_Clear, OnClear)
	ON_BN_CLICKED(IDC_Open, OnOpenPort)
	ON_BN_CLICKED(IDC_DisConn, OnDisConn)
	ON_BN_CLICKED(IDC_Send, OnMsgSend)
	ON_BN_CLICKED(IDC_Exit, OnExit)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWinSockUDPDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// 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
	
	// TODO: Add extra initialization here
	
	//设置自己派生的Socket类与对话框相关联
	m_uSocket.SetParent(this);
	//刚启动的时候，设置发送信息的按钮不可用
	m_btnSend.EnableWindow(false);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CWinSockUDPDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CWinSockUDPDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CWinSockUDPDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CWinSockUDPDlg::OnOK() 
{
	// TODO: Add extra validation here
	
	//CDialog::OnOK();
}

void CWinSockUDPDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	//CDialog::OnCancel();
}

void CWinSockUDPDlg::OnClose() 
{
	// TODO: Add your message handler code here and/or call default
	
	CDialog::OnCancel();
}

void CWinSockUDPDlg::OnReceive()
{
	
	char	*pBuf = new char[1025];
	int		iBufSize = 1024;
	int		iRecvd;
	CString	strRecvd;//接收的数据信息字符串
	int		iLen;

	

	// 接收信息，并返回接收到的字节数
	iRecvd = m_uSocket.Receive(pBuf, iBufSize);
	// 判断是否有错误发生
	if (iRecvd == SOCKET_ERROR)
	{
	}
	else
	{
		// 利用NULL来截去接收缓存区中多余的字符
		pBuf[iRecvd] = NULL;
		// 将接收到的有用的信息赋值给CString变量
		strRecvd = pBuf;
		iLen = strRecvd.GetLength();
	
		// 将接收到的信息加入到列表框中去,SendMessage将字符串添加到末尾
		m_lstChat.SendMessage(LB_INSERTSTRING, -1, (LPARAM)(LPCTSTR(strRecvd)));
		//将对应的变量的变化显示在控件上
		UpdateData(FALSE);
		delete pBuf;
	}
}

void CWinSockUDPDlg::OnSocketClose()
{
	m_uSocket.Close();
}

void CWinSockUDPDlg::OnClear() 
{
	// TODO: Add your control notification handler code here
	//清空列表框内容
	m_lstChat.SendMessage(LB_RESETCONTENT,0,0);
}

void CWinSockUDPDlg::OnOpenPort() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	if (m_iLPort<=0)
	{
		MessageBox("请输入大于0的本地端口号！");
		m_ctlLPort.SetFocus();
		return;
	}
	m_uSocket.Create(m_iLPort, SOCK_DGRAM);
	m_uSocket.Bind(m_iLPort);

	//启动发送信息的按钮
	m_btnSend.EnableWindow(true);
}

void CWinSockUDPDlg::OnDisConn() 
{
	// TODO: Add your control notification handler code here
	m_uSocket.Close();
	m_btnSend.EnableWindow(false);
}

void CWinSockUDPDlg::OnMsgSend() 
{
	// TODO: Add your control notification handler code here
	int iLen;//发送字符串的长度
	int iSend;//发送函数返回的结果
	

	CString strIp;//IP地址

	CString strName;//主机名
	CString strRemoteName;
	char	*pName = new char[256];
	struct	hostent	FAR *pHost, *pRhost;
	char	*addrIp ;

	UpdateData(true);
	
	//检查远程计算机名称和端口是否正确
	if(m_iSPort<=0 || m_strName=="")
	{
		MessageBox("请输入正确的服务器名称和端口号！");
		m_ctlName.SetFocus();
		return;
	}

	//验证要发送的信息是否合法
	if(""==m_strData)
	{
		MessageBox("不能发送空字符串！");
		m_ctlData.SetFocus();
		return;
	}

	//用来获取当前连接的Socket的本地主机名
	gethostname(pName, 256);
	strName = pName;
	//下面三条语句用来获取当前连接的Socket的本地IP地址
	pHost = gethostbyname(strName);
	addrIp = inet_ntoa(*((in_addr *)pHost->h_addr));
	strIp=addrIp;

	// 下面语句用来将远程计算机名称转换为对应的IP地址
	pRhost = gethostbyname(m_strName);
	//memcpy(&lngIp, pRhost->h_addr, 4);
	addrIp = inet_ntoa(*((in_addr *)pRhost->h_addr));
	strRemoteName=addrIp;
	
	//为字符串赋值
	m_strData = strName + "["+ strIp+ "]: " + m_strData;

	iLen = m_strData.GetLength();
	iSend = m_uSocket.SendTo(LPCTSTR(m_strData), iLen, m_iSPort, strRemoteName);//strRemoteName);
	//检查是否出错
	if(SOCKET_ERROR==iSend)
	{
		MessageBox("发送信息失败！");
		return;
	}
	else
	{
		// 将发送出的信息加入到列表框中去,SendMessage将字符串添加到末尾
		m_lstChat.SendMessage(LB_INSERTSTRING, -1, (LPARAM)(LPCTSTR(m_strData)));
		//清空一下输入信息框
		m_strData = "";
		
		//将对应的变量的变化显示在控件上
		UpdateData(false);
	}
	delete pName;
}

void CWinSockUDPDlg::OnExit() 
{
	// TODO: Add your control notification handler code here
	CDialog::OnOK();
}