Thread: Client/Server Socket Receive Problem

Im trying to send an array from the server application to the client on the same machine. The array is loaded and Sent from the server and recieved at the client but the array seems to be empty on the client side. I am using the socket.Receive function on the client side. I can send string messages back and forth without any problems. I am using Visual C++ MFC IDE tool to generate program.

Code:

//This is the server side declaration and Socket Send. I know that on the array has data in it on the server side

struct Countries
{
	CString m_strCountries;
	double m_lOffset;
	CString m_strSummer;
};
Countries Acountries[CLEN];

iSent = m_sConnectSocket.Send(Acountries,NULL,NULL);

//This is the client side declaration an Socket Receive

struct Countries
{
	CString m_strCountries;
	double m_lOffset;
	CString m_strSummer;
};

Countries Acountries[CLEN];

iRcvd = m_sConnectSocket.Receive(Acountries,NULL,NULL);


//Receive the message ** This is what I use to get the string
// messages that work correctly for both client and server

char *pBuf = new char[1025];
	int iBufSize = 1024;

	iRcvd = m_sConnectSocket.Receive(pBuf, iBufSize);

Any and all comments greatly appreciated.

MER

> iSent = m_sConnectSocket.Send(Acountries,NULL,NULL);
How does this know how much to send?
Check the return value in iSent to make sure it is what you expect.

> CString m_strCountries;
If this contains any hidden pointers, the data which they point to will NOT be copied across the link for you. All you will see at the receiver is an invalid pointer.
Since you can't know from one implementation to the next whether this class contains pointers or not, it's best to extract each string and send that separately.

> iRcvd = m_sConnectSocket.Receive(pBuf, iBufSize);
Check the value in iRcvd.
There are a couple of points to note - the most important one being that the network can fragment a message, so you may receive "hello world" in two or more separate messages, eg "he" followed by "llo world"

> I can send string messages back and forth without any problems
Then I suggest you do things like
m_sConnectSocket.Send(Acountries[0].m_strCountries.c_str(),NULL,NULL);

> Can you suggest a better way for me to send this database information to the client?
So what exactly is wrong with a for loop?

one suggestion is to place all shared sturctures into a single *.h file and then #include this file in both programs(client/server).