我想使用 WINAPI 创建两个窗口，然后我想使用 TCP scokets 在它们之间进行通信。 到目前为止，我已经成功创建了两个窗口，并成功打开了套接字。但是两个窗口如何使用这个套接字进行通信呢？这是我到目前为止编写的代码:
另一个问题是代码只从服务器到客户端发送一次数据。除非数据从服务器到客户端发送一次，否则不会处理其他 Windows 消息:(
有人可以帮助我吗？在此处输入代码服务器窗口:
// Program Name: server_window
// ===============================
// Author Name: Ayesha Hassan
// ===============================
// The Program creates a Listening Socket and waits for the client.
// As soon as a Client is connected to this Server's Listening Socket, a Window is launched.
// When the user Clicks on this window using Mouse, a Message is sent to the Client over the Connected Socket.
#include <windows.h>
#include <iostream.h>
#include "stdafx.h"
#include <winsock2.h>
#include <stdio.h>
#include <tchar.h>
#include "resource.h"
#pragma comment(lib,"ws2_32.lib")
SOCKET AH_GlbSocket;
const char AH_GlbClassName[] = "myWindClass"; ///Window Class Name
HWND AH_Glb_hwnd; //Header to Window
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam)
{
char message[]="Mouse Clicked On SERVER Window";
HDC hdc;
//Gets Handle for the Window
hdc=GetDC(hwnd);
char buffer[1000];
memset(buffer,0,999);
switch(msg)
{
case WM_LBUTTONDOWN:
//Sends Text to be displayed oon Client Window
send(AH_GlbSocket, message, strlen(message), 0);
break;
case WM_CREATE:
{
WSADATA WsaDat;
if(WSAStartup(MAKEWORD(2,2), &WsaDat)!=0)
{
//printf("WSA Initialization failed!\r\n");
WSACleanup();
system("PAUSE");
return 0;
}
AH_GlbSocket=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(AH_GlbSocket == INVALID_SOCKET)
{
//printf("AH_GlbSocket creation failed.\r\n");
WSACleanup();
system("PAUSE");
return 0;
}
//else
//printf("Socket created.\n");
SOCKADDR_IN serverInf;
serverInf.sin_family = AF_INET;
serverInf.sin_addr.s_addr = INADDR_ANY;
serverInf.sin_port = htons(8888);
if(bind(AH_GlbSocket,(SOCKADDR*)(&serverInf), sizeof(serverInf)) == SOCKET_ERROR)
{
//printf("Unable to bind AH_GlbSocket!\r\n");
WSACleanup();
system("PAUSE");
return 0;
}
listen(AH_GlbSocket, 1);
SOCKET TempSock = SOCKET_ERROR;
while(TempSock == SOCKET_ERROR)
{
//printf("Waiting for incoming connections...\n\n");
TempSock = accept(AH_GlbSocket, NULL, NULL);
}
AH_GlbSocket = TempSock;
}
break;
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd )
{
WNDCLASSEX wc;
MSG Msg;
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = NULL;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = AH_GlbClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
//wc.lpszMenuName = MAKEINTRESOURCE(IDR_MYMENU);
//wc.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
//wc.hIconSm = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 26, 26, 0);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
// Step 2: Creating Window1
AH_Glb_hwnd = CreateWindowEx( WS_EX_CLIENTEDGE,
AH_GlbClassName,
"I am SERVER Window",
WS_OVERLAPPEDWINDOW,
10,30, 540, 220,
NULL, NULL, NULL, NULL);
if(AH_Glb_hwnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(AH_Glb_hwnd,SW_SHOWDEFAULT);
UpdateWindow(AH_Glb_hwnd);
// Step 3: The Message Loop
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}
***CLIENT WINDOW:***
#include <windows.h>
#include "stdafx.h"
//#include <iostream.h>
#include <winsock2.h>
#include <stdio.h>
#include "resource.h"
#pragma comment(lib,"ws2_32.lib")
SOCKET AH_Glb_Socket;
const char AH_Glb_ClassName[] = "myWindClass";
HWND AH_Glb_hwnd;
// Step 4: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
// Initialise Winsock
WSADATA WsaDat;
if(WSAStartup(MAKEWORD(2,2),&WsaDat)!=0)
{
printf("Winsock error - Winsock initialization failed");
WSACleanup();
system("PAUSE");
return 0;
}
char* buff="CLIENT says: I am Going to connect to the server now\n\n";
printf(buff,sizeof(buff));
// Create our socket
SOCKET Socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if(Socket==INVALID_SOCKET)
{
printf("Winsock error - Socket creation Failed!\r\n");
WSACleanup();
system("PAUSE");
return 0;
}
// Resolve IP address for hostname
struct hostent *host;
if((host=gethostbyname("localhost"))==NULL)
{
printf("Failed to resolve hostname.\r\n");
WSACleanup();
system("PAUSE");
return 0;
}
// Setup our socket address structure
SOCKADDR_IN SockAddr;
SockAddr.sin_port=htons(8888);
SockAddr.sin_family=AF_INET;
SockAddr.sin_addr.s_addr=*((unsigned long*)host->h_addr);
// Attempt to connect to server
if(connect(Socket,(SOCKADDR*)(&SockAddr),sizeof(SockAddr))!=0)
{
printf("Failed to establish connection with server\r\n");
WSACleanup();
//system("PAUSE");
//return 0;
}
WNDCLASSEX wc;
MSG Msg;
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = NULL;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = AH_Glb_ClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
//wc.lpszMenuName = MAKEINTRESOURCE(IDR_MYMENU);
//wc.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
//wc.hIconSm = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 26, 26, 0);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
// Step 2: Creating Window1
AH_Glb_hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
AH_Glb_ClassName,
"I am CLIENT Window",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 440, 120,
NULL, NULL, NULL, NULL);
if(AH_Glb_hwnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(AH_Glb_hwnd,SW_SHOWDEFAULT);
UpdateWindow(AH_Glb_hwnd);
char buffer[1000];
memset(buffer,0,999);
recv(Socket,buffer,1000,0);
printf(buffer,sizeof(buffer));
TextOut(GetDC(AH_Glb_hwnd),5,5,buffer,sizeof(buffer));
// Step 3: The Message Loop
while(GetMessage(&Msg, NULL, 0, 0) > 0)
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}
最佳答案
尝试使用 WSAAsyncSelect 建立基于消息的连接；这样您就可以在程序运行时继续发送/接收消息。
有关 WSAAsyncSelect 函数的更多信息，请参见此处: http://msdn.microsoft.com/en-us/library/windows/desktop/ms741540%28v=vs.85%29.aspx
codeproject.com 上还有一个关于使用 WIN32 API + Winsock 的优秀教程:http://www.codeproject.com/Articles/13071/Programming-Windows-TCP-Sockets-in-C-for-the-Begin
如果您遵循本教程(包括注册窗口消息)，您应该能够多次从服务器向客户端发送数据，反之亦然，直到套接字关闭。
希望对您有所帮助。
Mmarss
关于c++ - 使用 TCP 套接字(WIN32 API)创建的两个窗口之间的通信，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15170898/