Get SQL Server default data path via ADO/C++?

Question

Hi,
I am trying to get the SQL Server default data path via ADO/Visual C++.
I find the SQL statements that will do that in
http://stackoverflow.com/questions/1883071/how-do-i-find-the-data-directory-for-a-sql-server-instance/12756990#12756990
So I just concat all the statements above into a CString object strStatements, then try to open a recordset as follows:
_RecordsetPtr m_pRecordset;
m_pRecordset.CreateInstance(__uuidof(Recordset));
m_pRecordset->Open(_bstrt(strStatements), _variant_t((IDispath *)m_pConnection, true), adOpenDymanic, adLockOptimistic, 0);
m_pRecordset->MoveFirst(); 
The last MoveFirst statement will cause com_error, which said
“ADODB.Recordset error '800a0e78'
Operation is not allowed when the object is closed.
It seems that there are no data in the recordset at all. What is the problem?
Thanks

Answer 1

Hello,
Which query statement did you used to get the database data and log file path? Can you get the result by run the query directly with SQL Server Management Studio? For example,  
SELECT SUBSTRING(physical_name, 1, CHARINDEX(N'master.mdf', LOWER(physical_name)) - 1)
FROM master.sys.master_files
WHERE database_id = 1 AND file_id = 1
Regards,
Fanny Liu
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Fanny Liu
TechNet Community Support