對話方塊中獲得文件指標pDoc （ 轉）
阿新 • • 發佈：2019-01-31
For a single document interface (SDI) application, add the following code to your SDI document's implementation file for CMyDoc::GetDoc():
// SDI document implementation file
CMyDoc * CMyDoc::GetDoc()
{
CFrameWnd * pFrame = (CFrameWnd *)(AfxGetApp()->m_pMainWnd);
return (CMyDoc *) pFrame->GetActiveDocument();
}
For a multiple document interface (MDI) application, the CMyDoc::GetDoc() code should be the following:
CMyDoc * CMyDoc::GetDoc()
{
CMDIChildWnd * pChild =
((CMDIFrameWnd*)(AfxGetApp()->m_pMainWnd))->MDIGetActive();
if ( !pChild )
return NULL;
CDocument * pDoc = pChild->GetActiveDocument();
if ( !pDoc )
return NULL;
// Fail if doc is of wrong kind
if ( ! pDoc->IsKindOf( RUNTIME_CLASS(CMyDoc) ) )
return NULL;
return (CMyDoc *) pDoc;
}