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/*******************************************************************
OLEDB 访问Accesss数据库们与SQL不同这里没有设置密码
*****************************************************************/
#import "C:\Program Files\Common Files\System\ADO\msado15.dll" no_namespace rename("EOF", "EndOfFile")
#include <iostream>
#include <windows.h>
#include <,C++ 帮忙如何16进制转为10进制;iomanip> //for setw()
using namespace std;
class STU
{
public:
char snum[10]; //学号
char sname[10]; //姓名
char ssex[2]; //姓别
long sage; //年龄
char smajor[20]; //专业
public:
STU(){}
~STU(){}
};
int main()
{
STU student;
::CoInitialize(NULL); // 初始化OLE/COM库环境 ，为拜访ADO接口做筹备
_RecordsetPtr m_pRecordset("ADODB.Recordset");
_ConnectionPtr m_pConnection("ADODB.Connection");
_bstr_t bstrSQL("select * from stu_info"); //查问语句
char * query_cmd = "DELETE FROM stu_info WHERE sname = '李破'";
try
{
// 创立Connection对象
m_pConnection.CreateInstance("ADODB.Connection");
// 设置衔接字符串，必需是BSTR型或者_bstr_t类型
_bstr_t strConnect= "Provider=SQLOLEDB;Server=(local);Database=student;";
//若数据库在网络上则Server为形如(192.168.1.5,3340)
m_pConnection->Open(strConnect,"","",adModeUnknown);//Access这里不设置密码，参数二是用户名，三是 密码，这里都置空就成
if(m_pConnection==NULL)
cerr<<"Lind data ERROR!\n";
// 创建记录集对象
m_pRecordset.CreateInstance(__uuidof(Recordset));
// 获得表中的记载
m_pRecordset->Open(bstrSQL,c++ 如何连接mysql数据库,m_pConnection.GetInterfacePtr(),
adOpenDynamic,adLockOptimistic,adCmdText);
_variant_t vsnum,vsname,vsage,vssex,vsmajor; //对应库中的snum,sname,sage,ssex,smajor
cout << " 学号 姓名 春秋 姓别 专业";
cout << "\n----------------------------------------------------------------\n";
while (!m_pRecordset->EndOfFile)
{
,c++ 中如何声明一个 int 变量; vsnum = m_pRecordset->GetCollect(_variant_t((long)0));//这儿给字段编号跟字段名都能够
vsname = m_pRecordset->GetCollect("sname");
vsage = m_pRecordset->GetCollect("sage");
vssex = m_pRecordset->GetCollect("ssex");
vsmajor = m_pRecordset->GetCollect("smajor");
if (vsnum.vt != VT_NULL&&vsname.vt != VT_NULL&&vsage.vt != VT_NULL
&&vssex.vt != VT_NULL&&vsmajor.vt != VT_NULL)
{
,c#网页设计！如何实现分页的功能？;cout.setf(ios::left);
cout << setw(14) << (char*)(_bstr_t)vsnum;
cout << setw(14) << (char*)(_bstr_t)vsname;
cout << setw(8) << vsage.lVal;
cout << setw(8) << (char*)(_bstr_t)vssex;
cout <<setw(20) << (char*)(_bstr_t)vsmajor;
cout.unsetf(ios::left);
cout << endl;
}
m_pRecordset->MoveNext(); ///移到下一条记录
}
cout << "\n----------------------------------------------------------------\n";
cout << "\n请输入你要增添的学生信息\n";
cout << "学号:";
cin >> student.snum;
cout << "\n姓名:";
cin >> student.sname;
cout << "\n年纪:";
cin >> student.sage;
cout << "\n姓别:";
cin >> student.ssex;
cout << "\n专业:";
cin >> student.smajor,C#如何连接access数据库。;
m_pRecordset->Move(2); //挪动到第一条记录
m_pRecordset->AddNew(); ///增加新记载
m_pRecordset->PutCollect("snum",_variant_t(student.snum));
m_pRecordset->PutCollect("sname",_variant_t(student.sname));
m_pRecordset->PutCollect("sage",_variant_t(student.sage));
m_pRecordset->PutCollect("ssex",_variant_t(student.ssex));
m_pRecordset->PutCollect("smajor",_variant_t(student.smajor));
m_pRecordset->Update();
m_pConnection->Execute(query_cmd,NULL,1); //用Execute履行sql语句来删除
m_pRecordset->Close(); // 封闭记录集
}
// 捕获异常
catch(_com_error e)
{
// 显示过错信息
cerr <<,C#如何调用事务; "\nERROR:" << (char*)e.Description();//抛出异样
}
if(m_pConnection->State)
m_pConnection->Close();
::CoUninitialize();
return 0;
}
(责任编辑：admin)
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