MFC_Socket（线程，自定义消息）

1、首先引入头文件#include <afxsock.h>
2、MFC中需要初始化资源
BOOL CSocketApp::InitInstance()
{
if ( !AfxSocketInit())
{
AfxMessageBox("Socket的初始化失败", MB_OK | MB_ICONSTOP);
return FALSE;
}

}

#include <afxsock.h> //socket头文件#include "afxcmn.h"#define WM_RECVDATA (WM_USER + 101)  //推荐+100，不要加1struct RECVPARAM{SOCKET socket;HWND hwnd;};class CSocketDlg : public CDialogEx{public:CSocketDlg(CWnd* pParent = NULL);~CSocketDlg();enum { IDD = IDD_SOCKET_DIALOG };protected:virtual void DoDataExchange(CDataExchange* pDX); static UINT WINAPI RecvThrPro(LPVOID lpParma); //线程函数static volatile BOOL m_bThrRun; //线程运行标志protected:HICON m_hIcon;// 生成的消息映射函数virtual BOOL OnInitDialog();afx_msg void OnSysCommand(UINT nID, LPARAM lParam);afx_msg void OnPaint();afx_msg HCURSOR OnQueryDragIcon();DECLARE_MESSAGE_MAP()private: SOCKET m_socket;RECVPARAM *m_pRecv;BOOL InitSocket();public: afx_msg void OnBnClickedBtnSend();CIPAddressCtrl m_ctrlIP;protected:afx_msg LRESULT OnRecvdata(WPARAM wParam, LPARAM lParam); //自定义消息回调函数public:afx_msg void OnBnClickedBtnCancel();};

// SocketDlg.cpp : 实现文件//#include "stdafx.h"#include "Socket.h"#include "SocketDlg.h"#include "afxdialogex.h"#ifdef _DEBUG#define new DEBUG_NEW#endifvolatile BOOL CSocketDlg::m_bThrRun;  //线程运行标志：声明class CAboutDlg : public CDialogEx{public:CAboutDlg();// 对话框数据enum { IDD = IDD_ABOUTBOX };protected:virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持// 实现protected:DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD){}void CAboutDlg::DoDataExchange(CDataExchange* pDX){CDialogEx::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)END_MESSAGE_MAP()CSocketDlg::CSocketDlg(CWnd* pParent /*=NULL*/): CDialogEx(CSocketDlg::IDD, pParent){m_pRecv = NULL;m_bThrRun = TRUE;m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}CSocketDlg::~CSocketDlg(){if ( NULL != m_socket ){closesocket(m_socket);}if ( NULL != m_pRecv){delete m_pRecv;m_pRecv = NULL;}}void CSocketDlg::DoDataExchange(CDataExchange* pDX){CDialogEx::DoDataExchange(pDX);DDX_Control(pDX, IDC_IPADDRESS1, m_ctrlIP);}BEGIN_MESSAGE_MAP(CSocketDlg, CDialogEx)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BTN_SEND, &CSocketDlg::OnBnClickedBtnSend)ON_MESSAGE(WM_RECVDATA, &CSocketDlg::OnRecvdata)     //自定义消息映射ON_BN_CLICKED(IDC_BUTTON2, &CSocketDlg::OnBnClickedBtnCancel)END_MESSAGE_MAP()// CSocketDlg 消息处理程序BOOL CSocketDlg::OnInitDialog(){CDialogEx::OnInitDialog();// 将“关于...”菜单项添加到系统菜单中。// IDM_ABOUTBOX 必须在系统命令范围内。ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX < 0xF000);CMenu* pSysMenu = GetSystemMenu(FALSE);if (pSysMenu != NULL){BOOL bNameValid;CString strAboutMenu;bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);ASSERT(bNameValid);if (!strAboutMenu.IsEmpty()){pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);}}// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动//  执行此操作SetIcon(m_hIcon, TRUE);// 设置大图标SetIcon(m_hIcon, FALSE);// 设置小图标// TODO: 在此添加额外的初始化代码InitSocket(); //sokcet初始化m_pRecv = new RECVPARAM;m_pRecv->socket = m_socket;m_pRecv->hwnd = m_hWnd;HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, RecvThrPro, (LPVOID)m_pRecv, 0, NULL);  //创建线程任务CloseHandle(hThread);return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE}UINT WINAPI CSocketDlg::RecvThrPro(LPVOID lpParma){SOCKET socket = ((RECVPARAM*)lpParma)->socket;HWND hwnd = ((RECVPARAM*)lpParma)->hwnd;SOCKADDR_IN addrFrom;int nLen = sizeof(SOCKADDR);char szRecvBuf[200] = {0};char szTempBuf[300] = {0};int retval;while (m_bThrRun){retval = recvfrom(socket, szRecvBuf, 200, 0, (SOCKADDR*)&addrFrom, &nLen);  //这个地方会阻塞，造成子线程不能正常结束，需要再研究改进if ( SOCKET_ERROR == retval ){break;}sprintf(szTempBuf, "%s Say: %s", inet_ntoa(addrFrom.sin_addr), szRecvBuf);::PostMessage(hwnd, WM_RECVDATA, 0, (LPARAM)szTempBuf);}return 0;}void CSocketDlg::OnSysCommand(UINT nID, LPARAM lParam){if ((nID & 0xFFF0) == IDM_ABOUTBOX){CAboutDlg dlgAbout;dlgAbout.DoModal();}else{CDialogEx::OnSysCommand(nID, lParam);}}void CSocketDlg::OnPaint(){if (IsIconic()){CPaintDC dc(this); // 用于绘制的设备上下文SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);// 使图标在工作区矩形中居中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;// 绘制图标dc.DrawIcon(x, y, m_hIcon);}else{CDialogEx::OnPaint();}}//当用户拖动最小化窗口时系统调用此函数取得光标//显示。HCURSOR CSocketDlg::OnQueryDragIcon(){return static_cast<HCURSOR>(m_hIcon);}BOOL CSocketDlg::InitSocket() //初始化：创建socket和绑定端口{//UDPm_bThrRun = TRUE;m_socket = socket(AF_INET, SOCK_DGRAM, 0);if ( INVALID_SOCKET == m_socket ){AfxMessageBox("创建套接字失败！");return FALSE;}SOCKADDR_IN addSock;addSock.sin_family = AF_INET;addSock.sin_port = htons(6000);addSock.sin_addr.S_un.S_addr = htonl(INADDR_ANY);if ( SOCKET_ERROR == bind(m_socket, (SOCKADDR*)&addSock, sizeof(SOCKADDR)) ){closesocket(m_socket);AfxMessageBox("端口绑定失败！", MB_OK | MB_ICONSTOP);return FALSE;}return TRUE;}void CSocketDlg::OnBnClickedBtnSend(){// TODO: 在此添加控件通知处理程序代码m_bThrRun = TRUE;DWORD dwIP = 0;((CIPAddressCtrl*)GetDlgItem(IDC_IPADDRESS1))->GetAddress(dwIP);SOCKADDR_IN addTo;addTo.sin_family = AF_INET;addTo.sin_port = htons(6000);//addTo.sin_addr.S_un.S_addr = htonl(dwIP);addTo.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");((CIPAddressCtrl*)GetDlgItem(IDC_IPADDRESS1))->SetAddress(ntohl(inet_addr("127.0.0.1")));CString strSend;GetDlgItemText(IDC_EDIT_SEND, strSend);if ( SOCKET_ERROR == sendto(m_socket, strSend, strSend.GetLength() + 1, 0, (SOCKADDR*)&addTo, sizeof(SOCKADDR)) ){AfxMessageBox("发送数据失败！", MB_OK | MB_ICONSTOP);}SetDlgItemText(IDC_EDIT_SEND, "");}afx_msg LRESULT CSocketDlg::OnRecvdata(WPARAM wParam, LPARAM lParam){CString str;CString strTemp;str = (char*)lParam;GetDlgItemText(IDC_EDIT_REC, strTemp);str += "\r\n";str += strTemp;SetDlgItemText(IDC_EDIT_REC, str);return 0;}void CSocketDlg::OnBnClickedBtnCancel(){// TODO: 在此添加控件通知处理程序代码m_bThrRun = FALSE;}