Unhandled exception in EastR.exe (MFC42D.DLL) :0xC0000005;Access Violation

1、編譯沒有錯誤。
--------------------Configuration: EastR - Win32 Debug--------------------

EastR.exe - 0 error(s), 0 warning(s)

2、運行到某一個函數報錯

3、調試到int m_ClockNo = atoi(NewNo->GetItemText(0,0).GetBuffer(NewNo->GetItemText(0,0).GetLength()));
報Unhandled exception in EastR.exe (MFC42D.DLL) :0xC0000005;Access Violation錯誤

附錯誤函數代碼：
void CChangeClockNo::OnOK()
{
 // TODO: Add extra validation here
 
 UpdateData(true);
 int New_id = atoi(m_strNewID.GetBuffer(m_strNewID.GetLength ()));
 int m_ClockNo = atoi(NewNo->GetItemText(0,0).GetBuffer(NewNo->GetItemText(0,0).GetLength()));
 int m_Rate = atoi(NewNo->GetItemText(0,2).GetBuffer(NewNo->GetItemText(0,2).GetLength ()));
 int Com = 1;
 int nItem = 0;
 

 HANDLE hPort;

 hPort = OpenCommPort(Com,m_Rate);
 if(!hPort)
 {
  AfxMessageBox("端口被占用！");
 }
 else
 { 
  int Model;
  double Ver;
  int cls;
  GetClockModel(hPort,Model,Ver,cls);
  if(Ver==880 || Ver==889 || Ver==900)
  {
   SetCmdVerify(true);
  }
  if(!CallClock(hPort,m_ClockNo))
  {
   AfxMessageBox("聯機失敗!");
  }
  else
  {    
   if(SetClockID(hPort,New_id))
   {
    AfxMessageBox("新機號設置成功!");
   }
   else
    AfxMessageBox("修改機號失敗!");
   
  }
  ClosePortHandle(hPort);
  UnCallClock(hPort);
 }
 
}

posted on 2007-08-29 17:09 isabc 閱讀(8986) 評論(4)  編輯 收藏 引用 所屬分類: BUG分析