本文整理汇总了C++中_ConnectionPtr::CreateInstance方法的典型用法代码示例。如果您正苦于以下问题：C++ _ConnectionPtr::CreateInstance方法的具体用法？C++ _ConnectionPtr::CreateInstance怎么用？C++ _ConnectionPtr::CreateInstance使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类_ConnectionPtr的用法示例。
在下文中一共展示了_ConnectionPtr::CreateInstance方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ConnectData
UINT CSplash::ConnectData(LPVOID ps)
{
AfxOleInit(); //初始化COM库
if(FAILED(HospitalConnect.CreateInstance(__uuidof(Connection))))
{
((CSplash *)ps)->ConnectFlag=true;
((CSplash *)ps)->timer_count=3; //连接COM失败标志
((CSplash *)ps)->SendMessage(WM_CLOSE,0,0);
return 0;
}
try{
HospitalConnect->Open(_bstr_t(theApp.strConn),"","",adModeUnknown);
((CSplash *)ps)->ConnectFlag=true;
((CSplash *)ps)->timer_count=1; //连接成功标志
((CSplash *)ps)->SendMessage(WM_CLOSE,0,0);
return 1;
}
catch(_com_error e)
{
((CSplash *)ps)->ConnectFlag=true; //作为进度条线程停止标志
((CSplash *)ps)->timer_count=2; //连接失败标志
((CSplash *)ps)->SendMessage(WM_CLOSE,0,0);
return 2;
}
}示例2: SetConnection
bool RxADO::SetConnection(CString LinkString)
{
::CoInitialize(NULL);
cnn=NULL;
cnn.CreateInstance(__uuidof(Connection));
cnn->ConnectionString=(_bstr_t)LinkString;
try{
cnn->Open(L"",L"",L"",adCmdUnspecified);
}
catch(_com_error& e)
{
ErrorsPtr pErrors=cnn->GetErrors();
if (pErrors->GetCount()==0)
{
CString ErrMsg=e.ErrorMessage();
MessageBox(NULL,"·¢Éú´íÎó:\n\n"+ErrMsg,"ϵͳÌáʾ",MB_OK|MB_ICONEXCLAMATION);
return false;
}
else
{
for (int i=0;i<pErrors->GetCount();i++)
{
_bstr_t desc=pErrors->GetItem((long)i)->GetDescription();
MessageBox(NULL,"·¢Éú´íÎó:\n\n"+desc,"ϵͳÌáʾ",MB_OK|MB_ICONEXCLAMATION);
return false;
}
}
}
return true;
}示例3: OpenDB
DWORD CNHSQLServerDBO::OpenDB(_ConnectionPtr &pConnection,
const wchar_t *const pwchDataSource,
const wchar_t *const pwchInitialCatalog,
const wchar_t *const pwchUserID,
const wchar_t *const pwchPassword)
{
assert(NULL != pwchDataSource);
assert(NULL != pwchInitialCatalog);
assert(NULL != pwchUserID);
assert(NULL != pwchPassword);
DWORD dwReturn(0x00);
wchar_t wchSql[MAX_PATH];
ZeroMemory(wchSql, sizeof(wchSql));
// 加载COM组件
CoInitialize(NULL);
try
{
_snwprintf_s(wchSql, _countof(wchSql), _TRUNCATE, L"Provider=SQLOLEDB; Data Source=%s; Initial Catalog=%s; User ID=%s; Password=%s;",
pwchDataSource,
pwchInitialCatalog,
pwchUserID,
pwchPassword);
pConnection.CreateInstance(L"ADODB.Connection");
//pConnection->ConnectionTimeout = 5;
//pConnection->CommandTimeout = 5;
pConnection->Open((_bstr_t)wchSql, L"", L"", adModeUnknown);
}
catch (_com_error &e)
{
//#ifdef _DEBUG
const int nErrMsgLength(MAX_PATH);
wchar_t *pwchErrMsg = new wchar_t[nErrMsgLength]();
_snwprintf_s(pwchErrMsg, nErrMsgLength, _TRUNCATE, L"CNHSQLServerDBO::OpenDB发生错误（执行%s）。", wchSql);
// 输出错误信息到输出窗口
OutputDebugStringW(L"\t");
OutputDebugStringW(pwchErrMsg);
OutputDebugStringW(L"\n");
// 输出错误信息到日志文件
if (0 != wcscmp(m_wchLogFilePath, L""))
{
// 当日志文件路径不为空时，写日志
CNHLogAPI::WriteLogEx(m_wchLogFilePath, LOG_ERR, L"NHSQLServerDBO", pwchErrMsg);
}
if (NULL != pwchErrMsg)
{
delete[] pwchErrMsg;
pwchErrMsg = NULL;
}
OutputDBErrMsg(e);
//#endif
dwReturn = 0x01;
}
return dwReturn;
}示例4: OnInitADOConn
// //封闭ADO类，方便以后使用
void ADOConn::OnInitADOConn(void)
{
::CoInitialize(NULL);
try
{
//创建connection对象
m_pConnection.CreateInstance("ADODB.Connection");
//设置连接字符串
_bstr_t strConnect="uid=;pwd=;DRIVER={Microsoft Access Driver (*.mdb)};DBQ=Grades.mdb;";
//SERVER和UID,PWD的设置根据实际情况来设置"
/*m_pConnection->Open(strConnect,_T("admin"),_T("owenyang"),adModeUnknown);*/
m_pConnection->Open(strConnect,"admin","owenyang",adModeUnknown);
}
catch (_com_error e)
{
//显示错误信息
AfxMessageBox(e.Description());
}
}示例5: Connect
//连接SQL
void Connect()
{
try{
::CoInitialize(NULL); //初始化COM环境
m_pConnection.CreateInstance(__uuidof(Connection)); //创建连接对象
//通过DSN数据源对任何支持ODBC的数据库进行连接
//m_pConnection->ConnectionString="Provider=SQLOLEDB.1; Persist Security Info=True; User ID=sa; Password=a1!; Initial Catalog=InTouch; Data Source=WIN-P6OLLUM9PDM"; //请将数据库相应ID与Password更改
//不通过DSN对SQL SERVER数据库进行连接
m_pConnection->ConnectionString="driver={SQL Server};Server=127.0.0.1;DATABASE=InTouch;UID=sa;PWD=a1!";
//连接服务器和数据库
HRESULT hr=m_pConnection->Open("", "", "", 0);
if(hr!=S_OK)
cout<<"Can not connect to the specified database!"<<endl;
}
catch(_com_error e){
cout<<e.Description()<<endl;
}
}示例6: ADOOpenDBCon
int CCommDBOper::ADOOpenDBCon(_ConnectionPtr &pCon,const CString strDB,CString &strPassword,int iWarn)
{
//函数功能 打开指定数据库
//输入参数说明 pCon 要打开的数据库对象,strDB 要连接的ACCESS数据库文件全路径
// strPassword 密码 iWarn 出错警告方式 0,不警告,1,警告,2,警告且退出程序
//作者 LFX
CString strCon;
_TCHAR dbConnectionString[]=_T("Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=%s;Jet OLEDB:Database Password=%s");
strCon.Format(dbConnectionString,strDB,strPassword);
if(!PathFileExists(_T(strDB)))
{
WarnMessage("要打开的数据库文件名不存在!!!",iWarn);
return RET_FAILED;
}
if (pCon == NULL)
{
pCon.CreateInstance(__uuidof(Connection) );
}
else
{
ADOCloseConnectDB(pCon,0);
}
int iLoop = 0;
while (true)
{
//连接ACCESS数据库
iLoop++;
//如果没密码，且为第一次循环
if ( strPassword.IsEmpty() && (iLoop <= 1))
{
try
{
pCon->Open(_bstr_t(strCon),"","",-1);
}
catch(_com_error &e)
{
CString strTemp;
CInputBox inputBox;
inputBox.m_bIsProtected = TRUE;
strTemp.LoadString(IDS_NEEDPASSWORD);
inputBox.m_strWndText.Format("%s%s",strDB,strTemp);
inputBox.m_strTitle.LoadString(IDS_PLEASEINPUTDBPASSWORD);
if (inputBox.DoModal() != IDOK)
{
WarnMessage("密码错误,打开数据库失败!!!",iWarn);
return RET_FAILED;
}
else
{
strPassword = inputBox.m_strValue;
}
}
break;
}
//如果有密码
try
{
pCon->Open(_bstr_t(strCon),"","",-1);
}
catch (_com_error &e)
{
CString strMsg;
strMsg.Format("%s:%d %s", __FILE__, __LINE__, (LPSTR)e.Description());
AfxMessageBox(strMsg);
CString errormessage;
errormessage.Format("打开数据库 %s 失败!\r\n错误信息:%s",strDB,e.ErrorMessage());
WarnMessage(errormessage,iWarn);
return RET_FAILED;
}
break;
} //END while(true)
return RET_OK;
}