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04.17.2008 at 07:29AM PDT, ID: 23330977
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9.2

How do I execute a parameterized stored query in MS Access using ole db consumer templates?

Asked by lcarr006 in Windows OLE Programming, Windows MFC Programming, Windows ATL / WTL / COM Programming

Tags: , ,

I am programming in c++ 9 (visual studio 2008) and using ole db consumer templates. I am able to call the stored queries, but I cant quite get the parameterized ones to work.

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Here is the code:
 
	// Open DB
	CDataSource DataSource;
	CString m_DSN = "C:\\Program Files\\NYLBIS\\Database\\db1.MDB";
	CString m_connStr = "Provider=Microsoft.Jet.OLEDB.4.0;User ID=Admin;Data Source=" + m_DSN + ";Mode=ReadWrite;Extended Properties=\"\";Jet OLEDB:System database=\"\";Jet OLEDB:Registry Path=\"\";Jet OLEDB:Database Password=\"\";Jet OLEDB:Engine Type=4;Jet OLEDB:Database Locking Mode=0;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password=\"\";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False";
	DataSource.OpenFromInitializationString(m_connStr.AllocSysString());
 
	// Create session object
	CSession Session;
	Session.Open(DataSource);
 
	CDBPropSet propset (DBPROPSET_ROWSET);
	propset.AddProperty(DBPROP_IRowsetChange, true);
	propset.AddProperty(DBACCESSOR_PARAMETERDATA, true);
	propset.AddProperty(DBACCESSOR_ROWDATA, true);	
      propset.AddProperty(DBPROP_UPDATABILITY, DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE);
 
	LPCSTR CommandText = "EXECUTE ZipcodeFilter ?";
 
	hr = m_command_mult.Create(Session, CommandText, DBGUID_DEFAULT); // hr = S_OK
	hr = m_command_mult.Prepare();	    // hr = S_OK
 
	// param vars
	const int ParamCount = 1;
	DBORDINAL dbOrd[ParamCount];
	DBPARAMBINDINFO dbBind[ParamCount];
 
	// set bind info
	// zipcode
        dbBind[0].bPrecision			= 0;
        dbBind[0].bScale			= 0;
        dbBind[0].dwFlags			= DBPARAMFLAGS_ISINPUT;
        dbBind[0].pwszName			= L"parm";
        dbBind[0].ulParamSize			= 5;
        dbBind[0].pwszDataSourceType	        = L"DBTYPE_WSTR";
        dbOrd[0] = 1;	// add parameter ordinal
 
	//Set the parameters information.	
	hr = m_command_mult.SetParameterInfo(ParamCount, dbOrd, dbBind); 
        // hr returns DB_E_BADTYPENAME
 
	// Bind the parameters with the accessor and command
	void* pDummy;
   hr = m_command_mult.BindParameters(&m_command_mult.m_hParameterAccessor, m_command_mult.m_spCommand,&pDummy);
// hr returns S_OK
 
	wchar_t* nParamValue1 = L"33173";
	flag = m_command_mult.SetParamString((ULONG)1, nParamValue1);   // flag returns false
 
	// Open the command.
        hr = m_command_mult.Open(); // hr returns "DB_E_ERRORSINCOMMAND"
 
 
 
ZipcodeFilter QueryString = 
SELECT Zipcode.*
FROM Zipcode
WHERE (((Zipcode.Zipcode)=[parm]));
Related Solutions: How do I execute a stored query in MS Access using ole db consumer templates?
[+][-]04.17.2008 at 11:04AM PDT, ID: 21379679

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[+][-]04.17.2008 at 01:42PM PDT, ID: 21381166

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About this solution

Zones: Windows OLE Programming, Windows MFC Programming, Windows ATL / WTL / COM Programming
Tags: Microsoft, Visual Studio, 2008
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Solution Provided By: DanRollins
Participating Experts: 1
Solution Grade: A
 
 
[+][-]04.17.2008 at 01:52PM PDT, ID: 21381250

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