在CXXXXXApp::InitInstance()中，注释掉后来添加上的视图类的文档模板代码，只留下一个需要的即可。
CSDI1App theApp;
/////////////////////////////////////////////////////////////////////////////
// CSDI1App initialization
BOOL CSDI1App::InitInstance()
{
/*
{ // BLOCK: doc template registration
// Register the document template. Document templates serve
// as the connection between documents, frame windows and views.
// Attach this form to another document or frame window by changing
// the document or frame class in the constructor below.
CSingleDocTemplate* pNewDocTemplate = new CSingleDocTemplate(
IDR_PRJVIEW_TMPL,
RUNTIME_CLASS(CSDI1Doc), // document class
RUNTIME_CLASS(CMainFrame), // frame class
RUNTIME_CLASS(CPrjView)); // view class
AddDocTemplate(pNewDocTemplate);
}
*/
AfxEnableControlContainer();
// Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.
#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif
// Change the registry key under which our settings are stored.
// TODO: You should modify this string to be something appropriate
// such as the name of your company or organization.
SetRegistryKey(_T("Local AppWizard-Generated Applications"));
LoadStdProfileSettings(); // Load standard INI file options (including MRU)
// Register the applications document templates. Document templates
// serve as the connection between documents, frame windows and views.
CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CSDI1Doc),
RUNTIME_CLASS(CMainFrame), // main SDI frame window
RUNTIME_CLASS(CSDI1View));
AddDocTemplate(pDocTemplate);
// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);
// Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
return FALSE;
// The one and only window has been initialized, so show and update it.
m_pMainWnd->ShowWindow(SW_SHOW);
m_pMainWnd->UpdateWindow();
return TRUE;
}