MFC基于windows套接字函数代码示范

源文件下载：  MFC_TCP_Client_chat1.rar

关键代码：

void CMFC_TCP_Client_chat1Dlg::OnBnClickedButtonSend() //登录按钮
{
	// TODO: 在此添加控件通知处理程序代码
	//sockaddr_in serveraddr;
	CString strport;
	m_ServerIP.GetWindowTextA(m_IP);
	m_ServerPort.GetWindowText(strport);
	if (strport.IsEmpty() || m_IP.IsEmpty())
	{
		MessageBox("请设置服务器IP和端口号");
		return;
	}
	m_Port = atoi(strport); //字符转整数
	serveraddr.sin_family = AF_INET;
	serveraddr.sin_port = htons(m_Port);
	serveraddr.sin_addr.S_un.S_addr = inet_addr(m_IP);//inet_addr,字符串转IP
//	serveraddr.sin_addr.S_un.S_addr = InetPton(m_IP);
 if(connect(m_SockClient,(sockaddr*)&serveraddr,sizeof(serveraddr))!=0)
	//if (connect(m_SockClient, (sockaddr*)&serveraddr, sizeof(serveraddr)) == NULL)
	{
		MessageBox("连接失败");
		return;
	}
	else
		MessageBox("连接成功");
	DWORD nError = GetLastError();
	WSAAsyncSelect(m_SockClient,m_hWnd, CM_RECEIVE, FD_READ);
	//WSAAsyncSelect(m_SocketClient,m_hWnd,1000,FD_READ);
	//::WSAAsyncSelect(m_SocketClient,this->m_hWnd,CM_RECEIVE,FD_READ);
	//WSAAsyncSelect(m_SocketClient,m_hWnd,WM_USER+1000,FD_READ);

	CString strname, info;
	m_NickName.GetWindowTextA(strname);
	info.Format("%s-------->%s", strname, "进入聊天室了");
	send(m_SockClient, info.GetBuffer(0), info.GetLength(), 0);
	//MessageBox("already send");
	m_MsgList2.AddString(info);

}


HRESULT CMFC_TCP_Client_chat1Dlg::ReceiveInfo(WPARAM wParam, LPARAM lParam)
{
	char buffer[1024];
	if (lParam == FD_READ)
	{
		int num = recv(m_SockClient, buffer, 1024, 0);
		if (num == -1)
			return E_NOTIMPL;
		buffer[num] = 0;

		m_MsgList2.AddString(buffer);
	}

	return E_NOTIMPL;
}


void CMFC_TCP_Client_chat1Dlg::OnBnClickedButton2() //发送按钮
{
	// TODO: 在此添加控件通知处理程序代码
	CString strData, name, info;
	m_NickName.GetWindowTextA(name);
	//m_SendData.GetWindowTextA(info);
	m_SendData.GetWindowTextA(strData);

	//if(!name.IsEmpty()&&!info.IsEmpty())
	if (!name.IsEmpty() && !strData.IsEmpty())
	{
		info.Format("%s说：%s", name, strData);
		send(m_SockClient, info.GetBuffer(0), info.GetLength(), 0);
		m_MsgList2.AddString(info);
		m_SendData.SetWindowText("");
	}
	else
	{
		MessageBox("未连接或未输入");
	}
}

初始化位置添加：

// TODO: 在此添加额外的初始化代码
	m_SockClient = socket(AF_INET,SOCK_STREAM,0);
	m_ServerIP.SetWindowTextA("127.0.0.1");
	m_ServerPort.SetWindowTextA("6666");
	//::WSAAsyncSelect(m_SockClient, this->m_hWnd, CM_RECEIVE, FD_READ);
	DWORD error = GetLastError();
	
	m_NickName.SetWindowText("txwtech");

BOOL CMFC_TCP_Client_chat1App::InitInstance()里面添加：

if (!AfxSocketInit()) //new added，初始化套接字  {   //AfxMessageBox(IDP_SOCKETS_INIT_FAILED);   return FALSE;  }

stdafx.h中添加：

#include "afxsock.h"

源文件下载：