Catalog

1.1 client / Server interface design

client  

Server side  

1.2IP And port acquisition   

client

Server side

1.3 rewrite socket, Connecting server and client  

client

Server side

1.1 client / Server interface design

client  

Use 100 million diagram , Draw the client interface style to be implemented

With the blessing of powerful artistic cells , Our chat software interface has also taken shape ！

  client MFC Layout

Compilation result

Server side  

Server side MFC Layout

Compilation result

1.2IP And port acquisition   

client

obtain IP And port  

#include<atlbase.h>

void CMFCChatClientDlg::OnBnClickedConnectBtn()
{
	CString strPort, strIP;
	// Get the contents of the control 
	GetDlgItem(IDC_PORT_EDIT)->GetWindowText(strPort);
	GetDlgItem(IDC_IPADDRESS)->GetWindowText(strIP);
	//CString  turn char*
	USES_CONVERSION;
	LPCSTR szPort = (LPCSTR)T2A(strPort);
	LPCSTR szIP = (LPCSTR)T2A(strIP);
	TRACE("szPort=%s,szIP=%s", szPort, szIP);
}

Server side

Get port

#include<atlbase.h>

void CMFCChartServerDlg::OnBnClickedStartBtn()
{
	TRACE("OnBnClickedStartBtn");
	CString strPort;
	// Get the contents of the control 
	GetDlgItem(IDC_PORT_EDIT)->GetWindowText(strPort);
	//CString  turn char*
	USES_CONVERSION;
	LPCSTR szPort = (LPCSTR)T2A(strPort);
	TRACE("szPort=%s", szPort);
}

1.3 rewrite socket, Connecting server and client  

  Final effect

client

obtain IP And port , establish Socket ( rewrite OnConnect and OnReceive), call Connect Connect

Server side

Get port , establish Socket( rewrite OnAccept), Start listening ; Create another one after each connection with the client Socket( rewrite OnReceive)

client

Inherit CAsyncSocket class , And rewrite OnConnect( ) and onReceive  

#pragma once
#include<afxsock.h>
class CMySocket :
    public CAsyncSocket
{
public:
    CMySocket();
    virtual ~CMySocket();
    // rewrite Connect function 
    virtual void OnConnect(int nErrorCode);
    // rewrite Receive function 
    virtual void onReceive(int nErrorCode);

};

Rewrite function implementation  

void CMySocket::OnConnect(int nErrorCode)
{
	TRACE("############OnConnect");
	// Get the main window 
	CMFCChatClientDlg* dlg = (CMFCChatClientDlg*)AfxGetApp()->GetMainWnd();
	CString str;
	// Get the current time of the system 
	dlg->m_tm = CTime::GetCurrentTime();
	// Dead back 
	str = dlg->m_tm.Format("%X");
	str += _T(" The connection to the server was successful ");
	// Display the time in the history message 
	dlg->m_list.AddString(str);
	// Standard writing 
	CAsyncSocket::OnConnect(nErrorCode);
}

void CMySocket::OnReceive(int nErrorCode)
{
	TRACE("############onReceive");
}

On the client side “ Connect ” Control function  

Get port and IP, Create a Socket object , Create a Socket, Then connect

void CMFCChatClientDlg::OnBnClickedConnectBtn()
{
	// Get the port and IP
	CString strPort, strIP;
	// Get the contents of the control 
	GetDlgItem(IDC_PORT_EDIT)->GetWindowText(strPort);
	GetDlgItem(IDC_IPADDRESS)->GetWindowText(strIP);
	//CString  turn char*
	USES_CONVERSION;
	LPCSTR szPort = (LPCSTR)T2A(strPort);
	LPCSTR szIP = (LPCSTR)T2A(strIP);
	TRACE("szPort=%s,szIP=%s", szPort, szIP);
	// String to number 
	int iPort = _ttoi(strPort);
	// Create a socket object 
	m_client = new CMySocket;
	// Create socket 
	if (!m_client->Create()) {
		// Error code 10093, Need in the project .cpp Of documents InitInstance( ) Call in function AfcSocketInit() Function initial words 
		TRACE("m_client Create error %d", GetLastError());
		return;
	}
	else {
		TRACE("m_client Creat Success");
	}


	// Connect 
	/* There is no way to judge whether the connection is successful , You need to judge in the callback function ; So if you use 
	* if(!m_client->Connect(strIP,iPort)) If you judge whether the connection is successful, you will report 10035(WSAEWOULDBLOCK) error 
	*  If you want to judge here, you only need to judge whether it is equal to SOCKET_ERROR That's all right. 
	*/
	if (m_client->Connect(strIP, iPort) != SOCKET_ERROR) {
		TRACE("m_client Connect errot %d", GetLastError());
	}


}

Server side

CServerSocket Inherit CAsyncSocket class , And rewrite OnAccept( ) function  —— Monitor class

#pragma once
#include<afxsock.h>
class CServerSocket :
    public CAsyncSocket
{
public:
    CServerSocket();
    virtual ~CServerSocket();
    virtual void OnAccept(int nErrorCode);
};

Rewrite function implementation

void CServerSocket::OnAccept(int nErrorCode)
{
	TRACE("#####OnAccept");
	CMFCChartServerDlg* dlg = (CMFCChartServerDlg*)AfxGetApp()->GetMainWnd();
	// Create one connection at a time socket
	dlg->m_chat = new CChatSocket;
	// Receive client connections 
	Accept(*(dlg->m_chat));
	CString str;
	dlg->m_tm = CTime::GetCurrentTime();
	str = dlg->m_tm.Format("%X");
	str += _T(" Client connection successful ");
	dlg->m_list.AddString(str);
	dlg->m_list.UpdateData(FALSE);
	CAsyncSocket::OnAccept(nErrorCode);
}

 CChatServet Inherit CAsyncSocket class , And rewrite OnReceive( ) function  —— Connection class

#pragma once
#include <afxsock.h>
class CChatSocket :
    public CAsyncSocket
{
public:
    CChatSocket();
    virtual ~CChatSocket();
    virtual void OnReceive(int nErrorCode);

};

  Rewrite function implementation

void CChatSocket::OnReceive(int nErrorCode)
{
}

On the server “ start-up ” Control function    

Get the port value , establish Socket object , establish Socket, monitor

void CMFCChartServerDlg::OnBnClickedStartBtn()
{
	TRACE("OnBnClickedStartBtn");
	CString strPort;
	// Get the contents of the control 
	GetDlgItem(IDC_PORT_EDIT)->GetWindowText(strPort);
	//CString  turn char*
	USES_CONVERSION;
	LPCSTR szPort = (LPCSTR)T2A(strPort);
	TRACE("szPort=%s", szPort);
	// Create a server Socket The object of 
	m_server = new CServerSocket;
	// establish Socket（ Socket ）
	int iPort = _ttoi(strPort);

	if (!m_server->Create(iPort)) {
		TRACE("m_server Create errorCode=%d", GetLastError());
		return;
	}

	// monitor , Callback when there is a client connection OnAccept
	if (!m_server->Listen()) {
		TRACE("m_sercer listen Create errorCode=%d", GetLastError());
		return;
	}
	CString str;
	m_tm = CTime::GetCurrentTime();
	str = m_tm.Format("%X");
	str += _T(" Building services ");
	m_list.AddString(str);
	// Update the data ,FALSE Get the data out of the control ,TRUE Get the data from the control 
	UpdateData(FALSE);
}