我在OnOK()函数中加入以下代码:
_variant_t var;
::CoInitialize(NULL);//初始化Com库
m_pConnection.CreateInstance(__uuidof(Connection));//初始化Connection指针
m_pRecordset.CreateInstance(__uuidof(Recordset));//初始化Recordset指针
try
{
//打开远程的SQL库
CString sql="provider=SQLOLEDB;Data Source=218.196.123.36;User ID=sa;Password='123456'";//数据库访问模式定义为标准的,密码定为123456
m_pConnection->Open(_bstr_t(sql),"","",adModeUnknown);
}
catch(_com_error e) //捕捉异常
{
//显示错误信息
AfxMessageBox(e.ErrorMessage());
}
try
{
// 创建Recordset对象,执行SQL命令并取得结果记录集;
m_pRecordset.CreateInstance("ADODB.Recordset");
m_pRecordset->Open("SELECT * FROM chezhou1",
m_pConnection.GetInterfacePtr(),
adOpenStatic,
adLockOptimistic,//乐观锁定方式,只有在你调用Update方法时才锁定 记录,在此之前仍然可以做数据的更新、插入、删除等动作。
adCmdText);//表明CommandText是文本命令
while(!m_pRecordset->adoEOF)//遍历所有记录
{
var = m_pRecordset->GetCollect(long(0));
if(var.vt!=VT_NULL)
id=var.iVal;
if(id==m_x.GetCurSel())
{ // 读入库中的相应字段
var=m_pRecordset->GetCollect(long(2));
if(var.vt!=VT_NULL)
d1=var;
var=m_pRecordset->GetCollect(long(3));
if(var.vt!=VT_NULL)
d2=var;
var=m_pRecordset->GetCollect(long(4));
if(var.vt!=VT_NULL)
d4=var;
var=m_pRecordset->GetCollect(long(5));
if(var.vt!=VT_NULL)
d5=var;
var=m_pRecordset->GetCollect(long(6));
if(var.vt!=VT_NULL)
L1=var;
var=m_pRecordset->GetCollect(long(7));
if(var.vt!=VT_NULL)
L3=var;
var=m_pRecordset->GetCollect(long(8));
if(var.vt!=VT_NULL)
Lw=var;
break;
}
m_pRecordset->MoveNext();
}
}
catch(_com_error e) //捕捉异常
{
//显示错误信息
AfxMessageBox(e.ErrorMessage());
}
m_pRecordset->Close(); //注意!!!不要多次关闭!!!!否则会出错
m_pConnection->Close();
m_pRecordset=NULL;
m_pConnection=NULL;
::CoUninitialize();//释放程序占用的COM资源都整了一周了~~
不管是远程还是本地都连接不上~
那位高手指点一下~~
最好给个实例~谢谢~~~
_variant_t var;
::CoInitialize(NULL);//初始化Com库
m_pConnection.CreateInstance(__uuidof(Connection));//初始化Connection指针
m_pRecordset.CreateInstance(__uuidof(Recordset));//初始化Recordset指针
try
{
//打开远程的SQL库
CString sql="provider=SQLOLEDB;Data Source=218.196.123.36;User ID=sa;Password='123456'";//数据库访问模式定义为标准的,密码定为123456
m_pConnection->Open(_bstr_t(sql),"","",adModeUnknown);
}
catch(_com_error e) //捕捉异常
{
//显示错误信息
AfxMessageBox(e.ErrorMessage());
}
try
{
// 创建Recordset对象,执行SQL命令并取得结果记录集;
m_pRecordset.CreateInstance("ADODB.Recordset");
m_pRecordset->Open("SELECT * FROM chezhou1",
m_pConnection.GetInterfacePtr(),
adOpenStatic,
adLockOptimistic,//乐观锁定方式,只有在你调用Update方法时才锁定 记录,在此之前仍然可以做数据的更新、插入、删除等动作。
adCmdText);//表明CommandText是文本命令
while(!m_pRecordset->adoEOF)//遍历所有记录
{
var = m_pRecordset->GetCollect(long(0));
if(var.vt!=VT_NULL)
id=var.iVal;
if(id==m_x.GetCurSel())
{ // 读入库中的相应字段
var=m_pRecordset->GetCollect(long(2));
if(var.vt!=VT_NULL)
d1=var;
var=m_pRecordset->GetCollect(long(3));
if(var.vt!=VT_NULL)
d2=var;
var=m_pRecordset->GetCollect(long(4));
if(var.vt!=VT_NULL)
d4=var;
var=m_pRecordset->GetCollect(long(5));
if(var.vt!=VT_NULL)
d5=var;
var=m_pRecordset->GetCollect(long(6));
if(var.vt!=VT_NULL)
L1=var;
var=m_pRecordset->GetCollect(long(7));
if(var.vt!=VT_NULL)
L3=var;
var=m_pRecordset->GetCollect(long(8));
if(var.vt!=VT_NULL)
Lw=var;
break;
}
m_pRecordset->MoveNext();
}
}
catch(_com_error e) //捕捉异常
{
//显示错误信息
AfxMessageBox(e.ErrorMessage());
}
m_pRecordset->Close(); //注意!!!不要多次关闭!!!!否则会出错
m_pConnection->Close();
m_pRecordset=NULL;
m_pConnection=NULL;
::CoUninitialize();//释放程序占用的COM资源都整了一周了~~
不管是远程还是本地都连接不上~
那位高手指点一下~~
最好给个实例~谢谢~~~
给你段c代码,你自己揣摩下
/*******************************************************************
利用ADO访问MS SQL2000
要求: 【1】输出stu_info表内的每一条记录
【2】添加一条新记录
【3】删除名字为"本拉登"的记录
*/
#import "c:\Program Files\Common Files\System\ADO\msado15.dll" \
no_namespace rename("EOF", "EndOfFile")
#include <iostream>
#include <iomanip> //for setw()
using namespace std;
class STU
{
public:
char snum[10];
char sname[10];
char ssex[2];
long sage;
char smajor[20];
public:
STU(){}
~STU(){}
}; int main()
{
STU student;
::CoInitialize(NULL);
_RecordsetPtr m_pRecordset("ADODB.Recordset");
_ConnectionPtr m_pConnection("ADODB.Connection");
_bstr_t bstrSQL("select * from stu_info");
char * query_cmd = "DELETE FROM stu_info WHERE sname = '本拉登'";
try
{
m_pConnection.CreateInstance("ADODB.Connection");
_bstr_t strConnect= "Provider=SQLOLEDB;Server=(local);Database=student; uid=sa; pwd=sa;";
m_pConnection->Open(strConnect,"","",adModeUnknown);
if(m_pConnection==NULL)
cerr<<"Lind data ERROR!\n";
m_pRecordset.CreateInstance(_uuidof(Recordset));
m_pRecordset->Open(bstrSQL,m_pConnection.GetInterfacePtr(),
adOpenDynamic,adLockOptimistic,adCmdText); _variant_t vsnum,vsname,vsage,vssex,vsmajor;
cout <<"学号 姓名 年龄 姓别 专业";
cout << "\n----------------------------------------------------------------\n";
while(!m_pRecordset->EndOfFile)
{
vsnum = m_pRecordset->GetCollect(_variant_t((long)0));
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)
{
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();
}
cout << "\n----------------------------------------------------------------\n";
cout << "\n请输入你要添加的学生信息\n";
cout << "学号:";
cin >> student.snum;
cout << "\n姓名:";
cin >> student.sname;
cout << "\n年龄:";
cin >> student.sage;
cout << "\n姓别:";
cin >> student.ssex;
cout << "\n专业:";
cin >> student.smajor;
m_pRecordset->MoveFirst();
m_pRecordset->AddNew();
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);
m_pRecordset->Close();
}
catch(_com_error e)
{
cerr << "\nERROR:" << (char*)e.Description();
}
if(m_pConnection->State)
m_pConnection->Close();
::CoUninitialize();
return 0;
}