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05.27.2008 at 12:40PM PDT, ID: 23436085
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7.4

OLE DB Consumer templates - Write to BLOB

Asked by yucafries in Windows Programming, C++ Programming Language

Tags: , ,

I am using an MS Access 2003 DB and trying to write to a Memo field. I am able to read but unable to write to the field. Here is some of my code:

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CString m_DSN = "C:\\NYLBISBuild\\Register\\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";
		hr = DataSource->OpenFromInitializationString(m_connStr.AllocSysString()); // S_OK
 
		// Create session object
		CSession Session;
		Session.Open(*DataSource);
 
		// properties
		CDBPropSet propset (DBPROPSET_ROWSET);
		propset.AddProperty(DBPROP_ISequentialStream, true);
		propset.AddProperty(DBPROP_IRowsetChange, true);		
		propset.AddProperty(DBPROP_IRowsetScroll, true);
		propset.AddProperty(DBPROP_UPDATABILITY, DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE);
 
		hr = m_table.Open(Session, "Table2", &propset); // S_OK
 
		m_table.MoveFirst();
 
		BYTE byte[10] = "test";
 
		ISequentialStream*        pStream;
		pStream = *(IStream**)m_table._GetDataPtr(1);
		
		hr = pStream->Write((void*)byte, sizeof(byte),NULL); // Access Denied
 
		hr = m_table.SetData();	//DB_E_ERRORSOCCURRED
		m_table.Close();
[+][-]05.30.2008 at 06:41AM PDT, ID: 21677607

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[+][-]05.31.2008 at 02:09AM PDT, ID: 21683195

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[+][-]06.02.2008 at 06:06AM PDT, ID: 21691566

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[+][-]06.02.2008 at 02:41PM PDT, ID: 21695912

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[+][-]06.03.2008 at 01:11PM PDT, ID: 21704056

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[+][-]06.04.2008 at 12:21PM PDT, ID: 21713191

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About this solution

Zones: Windows Programming, C++ Programming Language
Tags: Microsoft, Visual Studio, 2008
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Solution Provided By: yucafries
Participating Experts: 1
Solution Grade: A
 
 
 
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