KB192853 - A line 879 assert error occurs in the Wincore.cpp file when you use MFC classes

SYMPTOMS

Program: e:\test\app.exe File: wincore.cpp Line: 879

STDMETHODIMP CTest::TestMethod() { AFX_MANAGE_STATE(afxGetStaticModuleState()) CDatabase db; db.OpenEx("DSN=LocalServer;Database=pubs;UID=<username>;PWD=<strong password>;"); db.Close(); return S_OK; }

RESOLUTION

To get rid of the failed asserts, you can add the following code to debug builds:

Note Remember to change the following connection string parameters to reflect the correct values for your SQL Server server.

   class CTempRoutingFrame
   {
      CFrameWnd* m_pFrame ;
      public:
        CTempRoutingFrame(CFrameWnd * pWnd= NULL)
        {
          // Save current value.
          m_pFrame = AfxGetThreadState()->m_pRoutingFrame;
          // Set to value passed in. NULL by default.
          AfxGetThreadState()->m_pRoutingFrame = pWnd;
        }
        ~CTempRoutingFrame()
        {
          // Restore m_pRoutingFrame to original value.
          AfxGetThreadState()->m_pRoutingFrame = m_pFrame;
        }
   };

   STDMETHODIMP CsrvTest2::Test()
   {
      AFX_MANAGE_STATE(AfxGetStaticModuleState())

      #ifdef _DEBUG
        CTempRoutingFrame tmp;
      #endif

      CDatabase db;
      db.OpenEx("DSN=LocalServer;Database=pubs;UID=<username>;PWD=<strong password>;");
      db.Close();

      return S_OK;
   }

If you need to add this code in many places, you may want to write a macro such as the following:

   #ifdef _DEBUG
      #define ASSERT_FIX() CTempRoutingFrame tmp;
   #else
      #define ASSERT_FIX()
   #endif

So you can do the following:

   STDMETHODIMP CsrvTest2::Test()
   {
      AFX_MANAGE_STATE(AfxGetStaticModuleState())
      ASSERT_FIX()
      ...
   }

A line 879 assert error occurs in the Wincore.cpp file when you use MFC classes

SYMPTOMS

CAUSE

RESOLUTION

STATUS