CDatabase::ExecuteSQL() : Whats wrong with this code !?

Question

1.00/5 (1 vote)

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C++

CDatabase masterdb;

masterdb.OpenEx(_T("DRIVER=SQL Server;DATABASE=master;Trusted_Connection=Yes;SERVER=(local)\\SQLEXPRESS"));

CString strCurrentDir;

::GetModuleFileName(NULL, strCurrentDir.GetBufferSetLength(_MAX_PATH), _MAX_PATH);
strCurrentDir.ReleaseBuffer();
strCurrentDir = strCurrentDir.Left(strCurrentDir.ReverseFind('\\') + 1);

CString strExec = _T("create database test on (name='test_data', filename = '") + strCurrentDir + _T("test_data.mdf')") +
                                 _T("\nlog on (name='test_log', filename = '") + strCurrentDir + _T("test_log.ldf')");

TRY
{
    masterdb.ExecuteSQL(strExec);
}
CATCH(CDBException, e)
{
    TCHAR buff[1024];
    e->GetErrorMessage(buff, 1024);
    AfxMessageBox(buff);
    e->Delete();
}
END_CATCH

masterdb.Close();

A handled Exception when reaching masterdb.ExecuteSQL(strExec); says:

CREATE FILE encountered operating system error 5(Access is denied.) while attempting to open or create the physical file 'C:\Program Files (x86)\Microsoft Visual Studio\MyProjects\master\Debug\test_data.mdf'.
CREATE DATABASE failed. Some file names listed could not be created.
Check related errors.

I don't know what it means.

Help me please.

Thank you for your understanding.

Posted 15-Feb-13 15:53pm

Mr. Tomay

Updated 16-Feb-13 15:07pm

v5

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Comments

bbirajdar 16-Feb-13 0:12am

You need to check the SQL in 'strExec' variable and check if it is valid

Mr. Tomay 16-Feb-13 10:12am

I have executed the content of strExec with SQL Server Management Studio, and the execution was successful.

Reza Alipour Fard 16-Feb-13 0:13am

Hi, Your question has ambiguity. what mean of CDatabase, CString, ...
Please complete information of your question.

1 solution

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Jibesh · Answer 1 · 2013-02-15T21:29:00

Solution 1

Check the return value of

vc

masterdb.OpenEx(_T("DRIVER=SQL Server;DATABASE=master;SERVER=(local)\\SQLEXPRESS"));

database connection may not be success.

do perform the database operation only when database open is success. also its always good to put these code under try catch block.

Posted 15-Feb-13 21:29pm

Jibesh

Comments

Mr. Tomay 16-Feb-13 10:13am

the return value of OpenEx was 0x00000001