void OpenSchemaX(TCHAR *TableName)
{
HRESULT hr = S_OK;
::CoInitialize(NULL); //初始化Com
IADORecordBinding *picRs = NULL;
_RecordsetPtr pRstSchema("ADODB.Recordset");
_ConnectionPtr pConnection("ADODB.Connection" );
pConnection-ConnectionString = TableName;
pConnection-Provider = "Microsoft.Jet.OLEDB.4.0";
try
{
pConnection-Open(pConnection-ConnectionString, "", "", adModeUnknown);
pRstSchema-QueryInterface(
__uuidof(IADORecordBinding), (LPVOID*)&picRs);
pRstSchema = pConnection-OpenSchema(adSchemaTables);//枚举表的名称处理
while(!(pRstSchema-EndOfFile))
{
CString strTableType;
_bstr_t table_name = pRstSchema-Fields-
GetItem("TABLE_NAME")-Value;//获取表的名称
_bstr_t table_type = pRstSchema-Fields-
GetItem("TABLE_TYPE")-Value;//获取表的类型
strTableType.Format("%s",(LPCSTR) table_type);
if(!lstrcmp(strTableType,_T("TABLE")))
{
m_strList.AddString((LPCSTR) table_name);//添加表的名称
}
pRstSchema-MoveNext();
}
// Clean up objects before exit.
pRstSchema-Close();
pConnection-Close();
}
catch (_com_error &e)
{
// Notify the user of errors if any.
// Pass a connection pointer accessed from the Connection.
PrintProviderError(pConnection);
PrintComError(e);
}
CoUninitialize();
}
void PrintProviderError(_ConnectionPtr pConnection)
{
ErrorPtr pErr = NULL;
if( (pConnection-Errors-Count) 0)
{
long nCount = pConnection-Errors-Count;
// Collection ranges from 0 to nCount -1.
for(long i = 0;i nCount;i++)
{
pErr = pConnection-Errors-GetItem(i);
CString strError;
strError.Format("Error number: %xt%s", pErr-Number, pErr-Description);
AfxMessageBox(strError);
}
}
}
void PrintComError(_com_error &e)
{
_bstr_t bstrSource(e.Source());
_bstr_t bstrDescription(e.Description());
// Print COM errors.
CString strError;
strError.Format("Error number: Description = %stCode meaning = %s",(LPCSTR) bstrDescription, e.ErrorMessage());
AfxMessageBox(strError);
}
调用方法：
CString strFileName;
TCHAR FileName[MAX_PATH];
TCHAR bigBuff[2048] = _T(""); // maximum common dialog buffer size
TCHAR szFilter[] = _T("Text Files (*.mdb)|*.mdb|All Files (*.*)|*.*
");
CFileDialog dlg(TRUE, NULL, NULL,
OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT, szFilter);
// Modify OPENFILENAME members directly to point to bigBuff
dlg.m_ofn.lpstrFile = bigBuff;
dlg.m_ofn.nMaxFile = sizeof(bigBuff);
if(IDOK == dlg.DoModal() )
{
strFileName = dlg.GetPathName();
lstrcpy(FileName,strFileName);
OpenSchemaX(FileName);
}
