Click here to Skip to main content
15,896,111 members
Articles / Desktop Programming / Win32

Creation and memory mapping existing DBF files as alternative of data serialization during work with modified CListCtrl classes in virtual mode on dialogs of MDI application

Rate me:
Please Sign up or sign in to vote.
4.64/5 (6 votes)
22 Jul 2009CPOL11 min read 47.2K   1.5K   26  
The demonstration of reading, writing and creation of standard DBF files with random access in memory instead of serialization of typical MFC application for descendants of CListCtrl classes in Virtual Mode.
/////////////////////////////////////////////////////////////////////////////
// MainDoc.h : interface of the CMainDoc class
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_MAINDOC_H__EMERY_EMERALD__INCLUDED_)
	#define AFX_MAINDOC_H__EMERY_EMERALD__INCLUDED_

	#if _MSC_VER > 1000
		#pragma once
	#endif // _MSC_VER > 1000

	//#include "Main.h"
	#include "Dbf\Dbf.h"

	class CMainApp;

	/////////////////////////////////////////////////////////////////////////////
	// MainDoc.h : interface of the CMainDoc class
	/////////////////////////////////////////////////////////////////////////////
	class CMainDoc : public CDocument {
		DECLARE_DYNCREATE(CMainDoc)

		protected:  // Create from serialization only
			CMainDoc();

		// Attributes
		public:
			//*** Main application pointer
			CMainApp *m_pMainApp;

			//*** Table Id
			ETABLE m_eTable;

			//*** Meta table header structure
			META_TABLE m_MetaTable;

			//*** Current table
			//CListCtrlEx *m_pTable;

			//*** Handle of dbf file
			HANDLE m_hDbfFile;

			//*** Handle of file mapping
			HANDLE m_hDbfMap;

			//*** Maps view of dbf file for its first part (where are header)
			DBF_FILE1 *m_pDbfView1;

			//*** Maps view of dbf file for its second part (where are data)
			DBF_FILE2 *m_pDbfView2;

			//*** Dbf header structure
			DBF_HEADER *m_pDbfHdr;

			//*** Number of records in dbf file
			ULONG m_nRecCount;

			//*** Length of one data record (including delete flag)
			ULONG m_nRecSize;

			//*** Number of fields in dbf file
			ULONG m_nFldCount;

			//*** Dynamic array of field names of all fields
			BYTE **m_aacFldName;

			//*** Dynamic array of field types of all fields
			BYTE *m_acFldType;

			//*** Dynamic array of offsets of all fields
			UINT *m_anOff;

			//*** Dynamic array of lengths (in bytes) of all fields
			BYTE *m_acLen;
			
			//*** Dynamic array of decimal places of all fields
			BYTE *m_acDec;
		// Operations
		public:
			//*** Creates current document (dbf) file
			BOOL CreateDocumentFile(TCHAR *szDbfName);

		// Overrides
		// ClassWizard generated virtual function overrides
		//{{AFX_VIRTUAL(CMainDoc)
		public:
			//virtual BOOL OnNewDocument();
			virtual BOOL OnOpenDocument(LPCTSTR szFileName);
			//virtual void Serialize(CArchive &Ar);
		//}}AFX_VIRTUAL

		// Implementation
		public:
			virtual ~CMainDoc();
		#ifdef _DEBUG
			virtual void AssertValid() const;
			virtual void Dump(CDumpContext& dc) const;
		#endif

		protected:

		// Generated message map functions
		protected:
			//{{AFX_MSG(CMainDoc)
			afx_msg void OnDestroy();
			//}}AFX_MSG

		DECLARE_MESSAGE_MAP()
	};

	//{{AFX_INSERT_LOCATION}}
	// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_MAINDOC_H__EMERY_EMERALD__INCLUDED_)

/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer
Ukraine Ukraine
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions