myodbcdbgridfile.h

本程序为了在对输入的文件进行HUFFMAN编码

// MyODBCDBGridFile.h: interface for the CMyODBCDBGridFile class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MYODBCDBGRIDFILE_H__8BFC17DA_2B03_475F_9840_1CBF21A0865B__INCLUDED_)
#define AFX_MYODBCDBGRIDFILE_H__8BFC17DA_2B03_475F_9840_1CBF21A0865B__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include "MyODBC.h"
#include "GridCtrl.h"
#include "odbcset.h"

class CMyODBCDBGridFile  
{
	struct SRowInfo
	{
		BOOL bWritten;
		char *pAddress;
	};
public:
	virtual ~CMyODBCDBGridFile();

	int Release();
	int SetGridText(GV_DISPINFO *pDispInfo);
	int InitGrid();
	CMyODBCDBGridFile(CGridCtrl *pGrid, CMyODBC *pODBCDB, CString strSql,  CString strFilePath);
	CMyODBCDBGridFile(CGridCtrl *pGrid = NULL, CString strSql = "", CString strServer = "", CString strUser = "", CString strPass = "", CString strFilePath = "");
private:
	int DealMapFileSizeLess();
	int GetMapFileSize();
	BOOL SetMapFileSize(int iMapFileSize = 10485760);
	int GetAGridData(int iRow, int iCol, CString &strOut);
	int GetSelectTotalCount();
	int FetchData();
	int InitMapFile();

private:
	CGridCtrl *m_pGrid;
	struct SRowInfo *m_pRowFileInfo;

	//for map file
	PVOID m_pvFile;
	HANDLE m_hFilemap, m_hFile;
	char *m_cpWrite;
	int m_iCurrentCount;
	CString m_strFilePath;
	int m_iMapFileSize;
	//for select query
	
	CMyODBC *m_pODBCDB;
	CODBCSet m_Set;
	CString m_strSql;
	CString m_strServer;
	CString m_strUser;
	CString m_strPass;
	int m_iTotalCount;
	int m_iOnceFetchRows;
	int m_bConnectMode;

};

#endif // !defined(AFX_MYODBCDBGRIDFILE_H__8BFC17DA_2B03_475F_9840_1CBF21A0865B__INCLUDED_)