CAsyncSocket::OnSend
Called by the framework to notify the socket that it can now send data by calling the Send member function.
virtual void OnSend(
int nErrorCode
);
Parameters
nErrorCode
The most recent error on a socket. The following error codes apply to the OnSend member function:0 The function executed successfully.
WSAENETDOWN The Windows Sockets implementation detected that the network subsystem failed.
Remarks
For more information, see Windows Sockets: Socket Notifications.
Example
// CMyAsyncSocket is derived from CAsyncSocket and defines the
// following variables:
// CString m_sendBuffer; //for async send
// int m_nBytesSent;
// int m_nBytesBufferSize;
void CMyAsyncSocket::OnSend(int nErrorCode)
{
while (m_nBytesSent < m_nBytesBufferSize)
{
int dwBytes;
if ((dwBytes = Send((LPCTSTR)m_sendBuffer + m_nBytesSent,
m_nBytesBufferSize - m_nBytesSent)) == SOCKET_ERROR)
{
if (GetLastError() == WSAEWOULDBLOCK)
{
break;
}
else
{
TCHAR szError[256];
_stprintf_s(szError, _T("Server Socket failed to send: %d"),
GetLastError());
Close();
AfxMessageBox (szError);
}
}
else
{
m_nBytesSent += dwBytes;
}
}
if (m_nBytesSent == m_nBytesBufferSize)
{
m_nBytesSent = m_nBytesBufferSize = 0;
m_sendBuffer = _T("");
}
CAsyncSocket::OnSend(nErrorCode);
}
Requirements
Header: afxsock.h