Database.h

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#pragma once
#include <vector>
#include <string>
using namespace std;
 
class Database
{
    void* _db;
 
public:
 
    Database();
    virtual ~Database();
 
    bool open(const wstring& filePath);
    void close();
 
    bool isConnected();
 
    bool execQuery(const wstring& wSqlStr, wstring& errorMsg, vector<vector<wstring>>& results);
    bool execQueryPaged(const wstring& wSqlStrWithoutLimitAndOrderBy, 
                        int pageSize, __int64 startRow,
                        const wstring& sortByColumnName, bool isDescending,
                        wstring& errorMsg, vector<vector<wstring>>& results, __int64& totalRowCount);
    bool execNonQuery(const wstring& wSqlStr, wstring& errorMsg);
};