Socket传输数据遇到的问题

Question

服务段端发送函数:void CBITDlg::SendMsg()
{ 
if(!m_SocketList.IsEmpty())
{
UpdateData(true);
POSITION pos;
CClientSocket* pSocket=(CClientSocket*)m_SocketList.GetHead();
int count;
for(pos=m_SocketList.GetHeadPosition();pos!=NULL;)
{
pSocket=(CClientSocket*)m_SocketList.GetNext(pos);

pSocket->Send(sen,sen.GetLength()); }
count=sen.GetLength();
sen.Empty();
UpdateData(false);

}
else 
    MessageBox(_T("未建立有Socket连接，无法传递消息！"),_T("服务器程序"));



}客户端接收函数:
void CBITRevDlg::ReceiveMsg(CChatSocket *pSocket)
{wchar_t buff[1000];
int count;
count=pSocket->Receive(buff,1000);
buff[count]=0;b.Format(_T("%s"),buff); 
UpdateData(false);
}当从服务器端向客户端发送数据时会发生数据丢失
如:(服务器端) 456789123->(客户端)4567참쳌쳌쳌쳌

Answer 1

for(pos=m_SocketList.GetHeadPosition();pos!=NULL;)
????

Answer 2

这个应该没问题   那是有的时候可能建多对socket

Answer 3

把创建socket的代码贴出来看看，可能那出了问题

Answer 4

class CClientSocket : public CSocket
{
DECLARE_DYNAMIC(CClientSocket);
private:
CClientSocket(const CClientSocket& rSrc);         // no implementation
void operator=(const CClientSocket& rSrc);  // no implementation// Construction
public:
CClientSocket();// Attributes
public:
// Operations // Overridable callbacks
protected:
virtual void OnReceive(int nErrorCode);// Implementation
public:
virtual ~CClientSocket();#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
};
void CClientSocket::OnReceive(int nErrorCode)
{

((CBITDlg*)(AfxGetApp()->m_pMainWnd))->ReceiveMsg(this);
CSocket::OnReceive(nErrorCode);
}class CListeningSocket : public CSocket
{
DECLARE_DYNAMIC(CListeningSocket);
private:
CListeningSocket(const CListeningSocket& rSrc);         // no implementation
void operator=(const CListeningSocket& rSrc);  // no implementation// Construction
public:
CListeningSocket();// Attributes
public:
// Overridable callbacks
protected:
virtual void OnAccept(int nErrorCode);// Implementation
public:
virtual ~CListeningSocket();#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
};void CListeningSocket::OnAccept(int nErrorCode)
{  CClientSocket* pSocket=new CClientSocket();
   CBITDlg* pMainWnd=
   ((CBITDlg*)(AfxGetApp()->m_pMainWnd));
   if(pMainWnd->m_pSocket->Accept(*pSocket))
   pMainWnd->m_SocketList.AddTail(pSocket);
   else 
   delete pSocket;
CSocket::OnAccept(nErrorCode);

}

Answer 5

class CChatSocket : public CSocket
{
DECLARE_DYNAMIC(CChatSocket);// Construction
public:
CChatSocket();// Operations
public:
// Implementation
protected:
virtual void OnReceive(int nErrorCode);
};
void CChatSocket::OnReceive(int nErrorCode){

((CBITRevDlg*)(AfxGetApp()->m_pMainWnd))->ReceiveMsg(this);
CSocket::OnReceive(nErrorCode);
}

Answer 6

问题解决了
不过还是挺模糊的pSocket->Send(LPCTSTR(sen),sen.GetLength());--->pSocket->Send(LPCTSTR(sen),1000);