Debug Assertion Failed! FILE viewform.cpp , line 69
2 {
3 CView * pOldActiveView = GetActiveView();
4 if (pOldActiveView -> IsKindOf(pViewClass) == TRUE) {
5 return ;
6 }
7 CCreateContext context;
8 context.m_pNewViewClass = pViewClass;
9 context.m_pCurrentDoc = GetActiveDocument();
10 context.m_pLastView = NULL;
11 context.m_pNewDocTemplate = NULL;
12 context.m_pCurrentFrame = NULL;
13 CView * pNewView = (CView * )CreateView( & context);
14 if (pNewView != NULL) {
15 pNewView -> ShowWindow(SW_SHOW);
16 pNewView -> OnInitialUpdate();
17 SetActiveView(pNewView);
18 RecalcLayout();
19
20 pOldActiveView -> DestroyWindow();
21 }
22 }
分割窗口时CFormView与Pane关联时出现的问题
分割窗口时，其中一个窗格Pane，所关联的视，这个视若是从 CEditView, CTreeView, CView等类导出的，则没有问题，若是从 CFormView导出的， 那么编译正常，但执行那个时会出现
---------------------------
Microsoft Visual C++ Debug Library
---------------------------
Debug Assertion Failed!
Program: D:\VC_PROJECT\testMultiPane\Debug\testMultiPane.exe
File: viewform.cpp
Line: 69
For information on how your program can cause an assertion
failure, see the Visual C++ documentation on asserts.
(Press Retry to debug the application)
---------------------------
Abort(A) Retry(R) Ignore(I)
---------------------------
错误，
原因是 CFormView 的导出类，需要与一个Dialog资源关联，这个Dialog的属性必须是ws_child，Style必须选 “下层”SystemMenu和TitleBar属性最好都设为False
参见 http://www.cnweblog.com/vcbird/archive/2005/10/10/36404.html
以前在出现
错误提示时，不知如何处理，在这次通过点击“重试”，debugger停在了
the debugge point to this line
Code:
ASSERT(FALSE); // invalid dialog template name
which appears in the following code snippet of the file VIEWFORM.cpp
Code:
BOOL CFormView::Create(LPCTSTR /*lpszClassName*/, LPCTSTR /*lpszWindowName*/,
DWORD dwRequestedStyle, const RECT& rect, CWnd* pParentWnd, UINT nID,
CCreateContext* pContext)
{
ASSERT(pParentWnd != NULL);
ASSERT(m_lpszTemplateName != NULL);
m_pCreateContext = pContext; // save state for later OnCreate
#ifdef _DEBUG
// dialog template must exist and be invisible with WS_CHILD set
if (!_AfxCheckDialogTemplate(m_lpszTemplateName, TRUE))
{
ASSERT(FALSE); //<====== debugger stops at this line // invalid dialog template name
PostNcDestroy(); // cleanup if Create fails too soon
return FALSE;
}
#endif //_DEBUG
// initialize common controls
VERIFY(AfxDeferRegisterClass(AFX_WNDCOMMCTLS_REG));
AfxDeferRegisterClass(AFX_WNDCOMMCTLSNEW_REG);
// call PreCreateWindow to get prefered extended style
CREATESTRUCT cs; memset(&cs, 0, sizeof(CREATESTRUCT));
if (dwRequestedStyle == 0)
dwRequestedStyle = AFX_WS_DEFAULT_VIEW;
cs.style = dwRequestedStyle;
if (!PreCreateWindow(cs))
return FALSE;
// create a modeless dialog
if (!CreateDlg(m_lpszTemplateName, pParentWnd))
return FALSE;
m_pCreateContext = NULL;
// we use the style from the template - but make sure that
// the WS_BORDER bit is correct
// the WS_BORDER bit will be whatever is in dwRequestedStyle
ModifyStyle(WS_BORDER|WS_CAPTION, cs.style & (WS_BORDER|WS_CAPTION));
ModifyStyleEx(WS_EX_CLIENTEDGE, cs.dwExStyle & WS_EX_CLIENTEDGE);
SetDlgCtrlID(nID);
CRect rectTemplate;
GetWindowRect(rectTemplate);
SetScrollSizes(MM_TEXT, rectTemplate.Size());
// initialize controls etc
if (!ExecuteDlgInit(m_lpszTemplateName))
return FALSE;
// force the size requested
SetWindowPos(NULL, rect.left, rect.top,
rect.right - rect.left, rect.bottom - rect.top,
SWP_NOZORDER|SWP_NOACTIVATE);
// make visible if requested
if (dwRequestedStyle & WS_VISIBLE)
ShowWindow(SW_NORMAL);
return TRUE;
}
如何，Google “dialog template must exist and be invisible with WS_CHILD set”发现网文
http://www.cnweblog.com/vcbird/archive/2005/10/10/36404.html
呵呵呵，看来解决该有望了，先去吃饭，回来继续
最终的解决办法是这样的，我重建了该工程，选择Insert Resource时选中“IDD_FORMVIEW”
其他代码没有变化
然后就成功了，呵呵呵，我表示非常欣慰，非常感谢在网络上分享的IT同仁们的辛勤耕耘！