c++ 操作Mysql ado

#pragma once

#ifndef DB_MYSQL_H

#define DB_MYSQL_H

 

#include "stdafx.h"

#include <winsock2.h>

#include "include/mysql.h"

#include <map>

 

#include <vector>

#include <iostream>

using namespace std;

typedef map<CString, CString > strMap;/*key: 字段 value: 值*/

 

class CDBMYSQL

{

public:

CDBMYSQL(CString szHost, CString szUser, CString szPassword, unsigned int port,CString szCharacter);// 构造函数

CDBMYSQL(); //构造函数 

~CDBMYSQL();//析构函数

protected:

MYSQL *m_pMYSQL; //代表一个到数据库的连接

private:

CString m_szHost; //连接的服务器

CString m_szUser; //用户名

CString m_szPassword; //连接密码

CString m_szCharacter;

unsigned int m_iPort; //连接端口

CString m_szDbName; //操作的数据库的名称

MYSQL_RES *m_pResult; //操作的结果

CString m_szQuery; //sql语句

unsigned long m_lNum; //返回查询得到的结果数

CString m_szError; //错误提示信息

unsigned int m_iDebug; //是否显示调试信息

strMap m_Info; //查询语句返回一条结果

vector<strMap>  m_vectorInfo; //查询语句可能会返回多条结果

vector<CString> m_vectorFields; //返回查询结果的列

void DisPlayError();

public:

 unsigned int DBConnect();//连接数据库

unsigned int DBSelect(CString szDB); //连接一个数据库

void SetQuery(CString szQuery); //设定查询语句

unsigned int DBQuery(); //查询数据库

strMap GetInfo(); //返回查询得到的一条结果

vector<strMap> GetArray(); //返回查询得到的结果

CString GetError(); //返回错误信息

vector<CString> GetFields();//返回查询后的列值

unsigned int InsertData(CString table,strMap *data); //向数据库中插入一条数据

unsigned long GetLastID(); //返回最后一个自动增量的值

unsigned long GetRowNum(); //返回一条sql语句影响的行数

unsigned int UpdateData(CString table,strMap *data,CString condition); //根据条件修改一条数据

unsigned int DeleteData(CString table,CString condition); //根据条件删除数据

 

};

  

#endif

 

哥修改的他人写的一套c++ 操作Mysql ado

#include "DBMYSQL.h"

CDBMYSQL::CDBMYSQL()

{

}

/*构造函数，设定连接的服务器，用户名，密码和端口*/

CDBMYSQL::CDBMYSQL(CString szHost, CString szUser, CString szPassword, unsigned int iPort=3306, CString szCharacter = "UTF8")

{

m_pMYSQL = mysql_init(NULL);

m_lNum = 0;

m_szError="";

m_szQuery="";

m_pResult = NULL;

m_szCharacter = szCharacter;

CDBMYSQL::m_szHost= szHost;

CDBMYSQL::m_szUser= szUser;

CDBMYSQL::m_szPassword= szPassword;

CDBMYSQL::m_iPort= iPort;

CDBMYSQL::m_szCharacter = szCharacter;

}

/*析构函数*/

CDBMYSQL::~CDBMYSQL()

{

if(m_pResult != NULL)

mysql_free_result(m_pResult);

m_vectorFields.clear();

m_szError = "";

m_vectorInfo.clear();

m_szDbName = "";

m_vectorInfo.clear();

mysql_close(m_pMYSQL);

}

/*连接数据库*/

unsigned int CDBMYSQL::DBConnect()

{

MYSQL *con;

if(m_pMYSQL == NULL)

{

m_szError = "初始化mysql错误";

return 1;

}

con = mysql_real_connect(m_pMYSQL, m_szHost.GetBuffer(0), m_szUser.GetBuffer(0), m_szPassword.GetBuffer(0), NULL, m_iPort,NULL,0);

if(con == NULL)

{

m_szError=mysql_error(m_pMYSQL);

return mysql_errno(m_pMYSQL);

}

mysql_set_character_set(m_pMYSQL, m_szCharacter);

return 0;

}

/*选择一个数据库*/

unsigned int CDBMYSQL::DBSelect(CString szDataBase)

{

unsigned int iRet;

if( m_pMYSQL == NULL) return 1;

m_szDbName = szDataBase;

iRet = mysql_select_db(m_pMYSQL,m_szDbName.GetBuffer(0));

if(iRet != 0)

{

m_szError += mysql_error(m_pMYSQL);

}

return iRet;

}

/*设定sql语句*/

void CDBMYSQL::SetQuery(CString szQuery)

{

ASSERT(!szQuery.IsEmpty());

if(m_pResult != NULL )

{

mysql_free_result(m_pResult);

}

m_szQuery = szQuery;

}

/*执行sql语句*/

unsigned int CDBMYSQL::DBQuery()

{

unsigned int iRet;

if( m_pMYSQL == NULL) return 1;

ASSERT(!m_szQuery.IsEmpty());

iRet = mysql_query(m_pMYSQL,m_szQuery.GetBuffer());

if(iRet == 0)

{

m_pResult = mysql_store_result(m_pMYSQL);

m_lNum = mysql_affected_rows(m_pMYSQL);

m_Info.clear();

m_vectorInfo.clear();

m_vectorFields.clear();

}

else

{

iRet = mysql_errno(m_pMYSQL);

m_szError = mysql_error(m_pMYSQL);

cout<<m_szError<<endl;

}

return iRet;

}

/*获取查询得到的一条结果*/

strMap CDBMYSQL::GetInfo()

{

MYSQL_ROW row;

unsigned int i;

ASSERT(m_pMYSQL != NULL);

if(m_Info.size() > 0) return m_Info;

if(m_pResult != NULL)

{

GetFields();

row = mysql_fetch_row(m_pResult);

if(row != NULL)

for(i=0;i<m_vectorFields.size();i++)

m_Info[m_vectorFields[i]] = (char*)row[i];

}

return m_Info;

}

/*获取查询得到的所有结果*/

vector<strMap> CDBMYSQL::GetArray()

{

MYSQL_ROW row;

unsigned int i;

strMap tmp;

ASSERT(m_pMYSQL != NULL);

if(m_vectorInfo.size() > 0) return m_vectorInfo;

if(m_pResult != NULL)

{

GetFields();

while(row = mysql_fetch_row(m_pResult))

{

if(row != NULL)

{

for(i=0;i<m_vectorFields.size();i++)

{

tmp[m_vectorFields[i]] = (char *)row[i];

}

m_vectorInfo.push_back(tmp);

}

}

}

return m_vectorInfo;

}

/*获取sql语句执行影响的行数*/

unsigned long CDBMYSQL::GetRowNum()

{

return m_lNum;

}

/*获取插入后的id号*/

unsigned long CDBMYSQL::GetLastID()

{

return mysql_insert_id(m_pMYSQL);

}

/*向数据库插入数据*/

unsigned int CDBMYSQL::InsertData(CString szTable,strMap *pData)

{

strMap::const_iterator iter;

CString szQuery;

int iFlag=0;

ASSERT(m_pMYSQL != NULL);

ASSERT(!szTable.IsEmpty());

ASSERT(pData != NULL);

for(iter = pData->begin(); iter!= pData->end(); iter++)

{

if(iFlag == 0)

{

szQuery = "insert into ";

szQuery += szTable;

szQuery += " set ";

szQuery += iter->first;

szQuery += " =  '";

szQuery += iter->second;

szQuery += "'";

iFlag++;

}

else

{

szQuery += ",";

szQuery += iter->first;

szQuery += "= '";

szQuery += iter->second;

szQuery += "'";

}

}

SetQuery(szQuery);

return DBQuery();

}

/*根据条件修改数据*/

unsigned int CDBMYSQL::UpdateData(CString szTable, strMap *pDataMap, CString szCondition)

{

strMap::const_iterator iter;

CString szQuery;

int iFlag = 0;

ASSERT(m_pMYSQL != NULL);

ASSERT(!szTable.IsEmpty());

ASSERT(pDataMap != NULL);

for(iter = pDataMap->begin(); iter!= pDataMap->end(); iter++)

{

if(iFlag == 0)

{

szQuery = " update ";

szQuery += szTable;

szQuery += " set ";

szQuery += iter->first;

szQuery += " = '";

szQuery += iter->second;

szQuery += "'";

iFlag++;

}

else

{

szQuery += ",";

szQuery += iter->first;

szQuery += "='";

szQuery += iter->second;

szQuery += "'";

}

}

if(szCondition.IsEmpty() != 0)

{

szQuery += " where ";

szQuery += szCondition;

}

SetQuery(szQuery);

return DBQuery();

}

/*根据条件删除数据*/

unsigned int CDBMYSQL::DeleteData(CString szTable, CString szCondition)

{

CString szQuery;

ASSERT(m_pMYSQL != NULL);

ASSERT(!szTable.IsEmpty());

szQuery = " delete from ";

szQuery += szTable;

if(szCondition!="")

{

szQuery += " where ";

szQuery += szCondition;

}

SetQuery(szQuery);

return DBQuery();

}

/*获取返回的错误信息*/

CString CDBMYSQL::GetError()

{

return m_szError;

}

/*返回查询后的列值*/

vector<CString> CDBMYSQL::GetFields()

{

MYSQL_FIELD *field;

ASSERT(m_pMYSQL != NULL);

if(m_vectorFields.size()>0) return m_vectorFields;

while(field = mysql_fetch_field(m_pResult))

m_vectorFields.push_back(field->name);

return m_vectorFields;

}

// 查询

CDBMYSQL *pDbMySQL = new CDBMYSQL("127.0.0.1", "root", "root", 3306, "gbk");

pDbMySQL->DBConnect();

pDbMySQL->DBSelect("demo");

pDbMySQL->SetQuery("select * from customer");

pDbMySQL->DBQuery();

vector<strMap> info = pDbMySQL->GetArray();

for (int i = 0; i < info.size(); i++)

{

TRACE("username = %s  solution =%s \r\n", info[i]["id"], info[i]["username"]);

}

strMap map;

map["username"] = "xs强";

map["company"] = "xxx投资";

pDbMySQL->UpdateData("customer",&map,"where id = 1");

map["id"] = "3";

map["username"] = "邵学成";

map["company"] = "xzxxx投资有限公司";

map["solutation"] = "先生";

map["phone"] = "136401273005";

map["mobile"] = "13640123005";

map["source"] = "同事";

map["sdate"] = "2011-11-1";

map["job"] = "程序员";

map["web"] = "71945221120";

map["email"] = "topxuh12enghua1@163.com";

map["createtime"] = "2010-11-04 21:11:59";

map["modifiedtime"] = "2010-11-04 21:11:59";

map["note"] = "一sx";

pDbMySQL->InsertData("customer",&map);

pDbMySQL->DeleteData("customer","  id=1");