display data of text file in list view

[ovidiucucu]

[ continued ]

Step 2: Read from text file and fill CDemoDocument::m_arrLines.
One common place to load the document is the overridden CDocument::Serialize.
However, this is not the best place in our case. We can get a CFile*pointer from CArchive argument or the file name. First is no use, because we need CStdioFile* (derived from CFile*). Also, we cannot use the file name because further we canget a share violation.
So better let's override CDocument::OnOpenDocument and simply call _ReadTextFile, similar to the method from that FAQ mentioned earlier.

class CDemoDocument : public CDocument
{
   // ...
   // Attributes
private:
   CStringArray m_arrLines;

   // Operations
public:
   CStringArray& GetDocumentData() {return m_arrLines;}
   // ...
   // ...
// Overrides
   virtual BOOL OnOpenDocument(LPCTSTR lpszPathName);

// Implementation
private:
   void _ReadTextFile(LPCTSTR pszFileName, CStringArray& arrLines);
};

BOOL CDemoDocument::OnOpenDocument(LPCTSTR lpszPathName)
{
   if (!CDocument::OnOpenDocument(lpszPathName))
      return FALSE;

   _ReadTextFile(lpszPathName, m_arrLines);
   return TRUE;
}

void CDemoDocument::_ReadTextFile(LPCTSTR pszFileName, CStringArray& arrLines)
{
   arrLines.RemoveAll(); 
   CString strLine; 
   TRY 
   { 
      CStdioFile file(pszFileName, CFile::modeRead); 
      while(file.ReadString(strLine)) 
         arrLines.Add(strLine); 
   } 
   CATCH_ALL(e) 
   { 
      e->ReportError(); // shows what's going wrong 
   } 
   END_CATCH_ALL 
}

[ to be continued ]