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Posted 20 Feb 2001

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Using the CDatabase class to read an Access databases

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4.71/5 (41 votes)
29 Mar 2001
This is a very simple code snippet that demonstrates how to read a Microsoft Access database file using the CDatabase class

Sample Image - ReadDB.gif

Introduction

This is a very simple code snippet that demonstrates how to read a Microsoft Access database using the CDatabase class.

The main features it demonstrates are:

  • Retrieving data from Microsoft Access database
  • Connecting without the need for an ODBC data source to be set up.
  • Populate a List view Control with the data
//
// Part of the source code
void CReadDBDlg::OnRead() 
{
	// TODO: Add your control notification handler code here
	CDatabase database;
	CString SqlString;
	CString sCatID, sCategory;
	CString sDriver = "MICROSOFT ACCESS DRIVER (*.mdb)";
	CString sDsn;
	CString sFile = "d:\\works\\ReadDB\\Test.mdb";
	// You must change above path if it's different
	int iRec = 0; 	
	
	// Build ODBC connection string
	sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s",sDriver,sFile);
	TRY
	{
		// Open the database
		database.Open(NULL,false,false,sDsn);
		
		// Allocate the recordset
		CRecordset recset( &database );

		// Build the SQL statement
		SqlString =  "SELECT CatID, Category "
				"FROM Categories";

		// Execute the query
		recset.Open(CRecordset::forwardOnly,SqlString,CRecordset::readOnly);
		// Reset List control if there is any data
		ResetListControl();
		// populate Grids
		ListView_SetExtendedListViewStyle(m_ListControl,LVS_EX_GRIDLINES);
 
		// Column width and heading
		m_ListControl.InsertColumn(0,"Category Id",LVCFMT_LEFT,-1,0);
		m_ListControl.InsertColumn(1,"Category",LVCFMT_LEFT,-1,1);
		m_ListControl.SetColumnWidth(0, 120);
		m_ListControl.SetColumnWidth(1, 200);

		// Loop through each record
		while( !recset.IsEOF() )
		{
			// Copy each column into a variable
			recset.GetFieldValue("CatID",sCatID);
			recset.GetFieldValue("Category",sCategory);

			// Insert values into the list control
			iRec = m_ListControl.InsertItem(0,sCatID,0);
			m_ListControl.SetItemText(0,1,sCategory);

			// goto next record
			recset.MoveNext();
		}
		// Close the database
		database.Close();
	}
	CATCH(CDBException, e)
	{
		// If a database exception occured, show error msg
		AfxMessageBox("Database error: "+e->m_strError);
	}
	END_CATCH;
}
	
// Reset List control
void CReadDBDlg::ResetListControl()
{
	m_ListControl.DeleteAllItems();
	int iNbrOfColumns;
	CHeaderCtrl* pHeader = (CHeaderCtrl*)m_ListControl.GetDlgItem(0);
	if (pHeader)
	{
		iNbrOfColumns = pHeader->GetItemCount();
	}
	for (int i = iNbrOfColumns; i >= 0; i--)
	{
		m_ListControl.DeleteColumn(i);
	}
}

License

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Comments and Discussions

 
Questionx64? Pin
gok20-Dec-16 5:38
professionalgok20-Dec-16 5:38 
QuestionCharacter truncation if switching to Unicode in Memo fields Pin
dlavrantonis15-Oct-13 5:11
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Questionconnect to mdf sql database Pin
Mahdi Nejadsahebi20-Dec-12 1:26
MemberMahdi Nejadsahebi20-Dec-12 1:26 
QuestionUsing the CDatabase class to read an Access databases-->write Pin
Member 942749014-Sep-12 22:13
MemberMember 942749014-Sep-12 22:13 
GeneralMy vote of 5 Pin
Mahdi Nejadsahebi27-Apr-12 20:15
MemberMahdi Nejadsahebi27-Apr-12 20:15 
GeneralError messages in running Using the CDatabase class to read an Access databases Pin
shiphy21-Mar-10 21:03
Membershiphy21-Mar-10 21:03 
GeneralRe: Too much in Try/Catch [modified] Pin
shiphy19-Mar-10 12:15
Membershiphy19-Mar-10 12:15 
GeneralToo much in Try/Catch Pin
William Winner19-Mar-10 10:49
MemberWilliam Winner19-Mar-10 10:49 
GeneralHaving problems showing data in my Access Database in the List Control Pin
shiphy19-Mar-10 10:18
Membershiphy19-Mar-10 10:18 
GeneralDatabase Error [modified] Pin
S p k 52129-Jun-08 20:24
MemberS p k 52129-Jun-08 20:24 
GeneralRe: Database Error Pin
zhaque3-Feb-10 15:00
Memberzhaque3-Feb-10 15:00 
GeneralDataBase Error Pin
S p k 52129-Jun-08 20:22
MemberS p k 52129-Jun-08 20:22 
GeneralThank you very much Pin
Jellow TK27-Feb-08 9:49
MemberJellow TK27-Feb-08 9:49 
QuestionHow to use Other databases Like "SQL"" Pin
rag84dec21-May-07 21:27
Memberrag84dec21-May-07 21:27 
QuestionRe: Multiple table help, please? Pin
mla15427-Feb-07 7:08
Membermla15427-Feb-07 7:08 
QuestionAccess file creation Pin
Arun M S17-Jan-07 19:28
MemberArun M S17-Jan-07 19:28 
QuestionIn modal dglboxes? Pin
swapna_signsin11-May-06 1:22
Memberswapna_signsin11-May-06 1:22 
Generalc/c++ with sql/access database Pin
Anonymous5-Oct-05 23:35
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Generalunresolved external symbol Pin
WinAPILearner31-Oct-04 12:44
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GeneralRe: unresolved external symbol Pin
Anonymous18-Feb-05 11:46
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GeneralRe: unresolved external symbol Pin
zhaque31-Oct-05 8:25
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GeneralBound error Pin
vivadot18-Oct-04 12:24
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AnswerRe: Bound error Pin
liuxiaop12-Feb-07 3:43
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Generaldatabase + listcontrol Pin
sakesh16-Sep-04 21:50
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QuestionUnicode? Pin
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