ADO基础知识:使用Connection对象连接数据库

使用ADO中的Connection对象连接数据库：

int _tmain(int argc, _TCHAR* argv[])

{

CoInitialize(NULL);

Connection15Ptr pConnect;

HRESULT RET;

try {

RET = pConnect.CreateInstance("ADODB.Connection");

pConnect->PutConnectionString("Provider=SQLOLEDB.1;Password=sa;Persist Security Info=True;User ID=sa;Initial Catalog=Northwind;Data Source=.");

pConnect->PutConnectionTimeout(10);

pConnect->PutCursorLocation(adUseClient);

pConnect->Open(_bstr_t(""),_bstr_t(""),_bstr_t(""),adConnectUnspecified);

cout<<"登录成功了..\n";

pConnect->Close();

}

catch(_com_error &e)

{

if(pConnect)

cout<<"Error"<<(LPCSTR)e.Description()<<endl;

else

cout<<"connection 未初始..."<<endl;

}

CoUninitialize();

return 0;

}