Home Database Mysql Tutorial 在VS环境下以ADO方式操作Oracle数据库

在VS环境下以ADO方式操作Oracle数据库

Jun 07, 2016 pm 05:33 PM

利用ADO引擎方式访问Oracle数据库的实现方法: 定义数据库头文件为CDBOperation.h #pragma once #import C:\Program Files\Com

利用ADO引擎方式访问Oracle数据库的实现方法:

定义数据库头文件为CDBOperation.h

#pragma once 
#import "C:\Program Files\Common Files\System\ADO\msado15.dll" no_namespace rename("EOF","adoEOF"),rename("LockTypeEnum","AdoLockTypeEnum"),rename("DataTypeEnum","AdoDataTypeEnum"),\
rename("FieldAttributeEnum","AdoFieldAttributeEnum"),rename("EditModeEnum","AdoEditModeEnum"),rename("RecordStatusEnum","AdoRecordStatusEnum"),rename("ParameterDirectionEnum","AdoParameterDirectionEnum")
class CDBOperation 

 public: 
  //初始化数据库操作需要的对象 
  CDBOperation(void); 
  ~CDBOperation(void); 
 
  //连接至数据库 
  bool ConnToDB(); 
 
  //数据库操作函数 
  //查询操作 删除以及添加 
  _RecordsetPtr ExecuteWithResSQL(const char *); 
 
 private: 
  void PrintErrorInfo(_com_error &); 
 
 private: 
  //初始化数据库连接、命令、记录集 
  _ConnectionPtr CreateConnPtr(); 
  _CommandPtr CreateCommPtr(); 
  _RecordsetPtr CreateRecsetPtr(); 
 
 private: 
  //数据库连接需要的连接、命令操作对象 
  _ConnectionPtr m_pConnection; 
  _CommandPtr m_pCommand; 
}; 

定义程序源文件CDBOperation.cpp

#include "CDBOperation.h" 

CDBOperation::CDBOperation(void) 

    CoInitialize(NULL); 
    m_pConnection = CreateConnPtr(); 
    m_pCommand = CreateCommPtr(); 

CDBOperation::~CDBOperation(void) 

    m_pConnection->Close(); 

bool CDBOperation::ConnToDB() 

    if (NULL == m_pConnection) 
    { 
        printf("Failed to create connection\n"); 
        return false; 
    } 
    try 
    { 
  _bstr_t strConnect="Provider=OraOLEDB.Oracle;User ID=scott;Password=19900624;Persist Security Info=True;Data Source=\"(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.108.85.137)(PORT = 1521)) )(CONNECT_DATA = (SID = ORCL)(SERVER=DEDICATED)))\"";
    HRESULT hr=m_pConnection->Open(strConnect,"","",NULL);
        if (TRUE == FAILED(hr)) 
        { 
            return false; 
        } 
        m_pCommand->ActiveConnection = m_pConnection; 
        return true; 
    } 
    catch(_com_error &e) 
    { 
        PrintErrorInfo(e); 
        return false; 
    } 

_RecordsetPtr CDBOperation::ExecuteWithResSQL(const char *sql) 

    try 
    { 
        m_pCommand->CommandText = _bstr_t(sql); 
        _RecordsetPtr pRst = m_pCommand->Execute(NULL, NULL, adCmdText); 
        return pRst; 
    } 
    catch(_com_error &e) 
    { 
        PrintErrorInfo(e); 
        return NULL; 
    } 

void CDBOperation::PrintErrorInfo(_com_error &e) 

    printf("Error infomation are as follows\n"); 
    printf("ErrorNo: %d\nError Message:%s\nError Source:%s\nError Description:%s\n", e.Error(), e.ErrorMessage(), (LPCTSTR)e.Source(), (LPCTSTR)e.Description()); 

 
_ConnectionPtr CDBOperation::CreateConnPtr() 

    HRESULT hr; 
    _ConnectionPtr connPtr; 
    hr = connPtr.CreateInstance(__uuidof(Connection)); 
    if (FAILED(hr) == TRUE) 
    { 
        return NULL; 
    } 
    return connPtr; 

 
_CommandPtr CDBOperation::CreateCommPtr() 

    HRESULT hr; 
    _CommandPtr commPtr; 
    hr = commPtr.CreateInstance(__uuidof(Command)); 
    if (FAILED(hr) == TRUE) 
    { 
        return NULL; 
    } 
    return commPtr; 

 
_RecordsetPtr CDBOperation::CreateRecsetPtr() 

    HRESULT hr; 
    _RecordsetPtr recsetPtr; 
    hr = recsetPtr.CreateInstance(__uuidof(Recordset)); 
    if (FAILED(hr) ==TRUE) 
    { 
        return NULL; 
    } 
    return recsetPtr; 

linux

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How do you alter a table in MySQL using the ALTER TABLE statement? How do you alter a table in MySQL using the ALTER TABLE statement? Mar 19, 2025 pm 03:51 PM

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

How do I configure SSL/TLS encryption for MySQL connections? How do I configure SSL/TLS encryption for MySQL connections? Mar 18, 2025 pm 12:01 PM

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

How do you handle large datasets in MySQL? How do you handle large datasets in MySQL? Mar 21, 2025 pm 12:15 PM

Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? Mar 21, 2025 pm 06:28 PM

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

How do you drop a table in MySQL using the DROP TABLE statement? How do you drop a table in MySQL using the DROP TABLE statement? Mar 19, 2025 pm 03:52 PM

The article discusses dropping tables in MySQL using the DROP TABLE statement, emphasizing precautions and risks. It highlights that the action is irreversible without backups, detailing recovery methods and potential production environment hazards.

How do you represent relationships using foreign keys? How do you represent relationships using foreign keys? Mar 19, 2025 pm 03:48 PM

Article discusses using foreign keys to represent relationships in databases, focusing on best practices, data integrity, and common pitfalls to avoid.

How do you create indexes on JSON columns? How do you create indexes on JSON columns? Mar 21, 2025 pm 12:13 PM

The article discusses creating indexes on JSON columns in various databases like PostgreSQL, MySQL, and MongoDB to enhance query performance. It explains the syntax and benefits of indexing specific JSON paths, and lists supported database systems.

How do I secure MySQL against common vulnerabilities (SQL injection, brute-force attacks)? How do I secure MySQL against common vulnerabilities (SQL injection, brute-force attacks)? Mar 18, 2025 pm 12:00 PM

Article discusses securing MySQL against SQL injection and brute-force attacks using prepared statements, input validation, and strong password policies.(159 characters)

See all articles