FlexGrid as DataGrid

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Introduction

I create a new AciveX control (FDGrid) to let FlexGrid control as DataGrid control. With this ActiveX, you can:

• Connect with database
• Fill FlexGrid with table
• Edit and add records
• MoveFirst, MoveLast, MoveNext and MovePrevious
• Auto save (Update) after Edit cell
• Edit grid without connecting to database file

Background

When using my ActiveX control (FDGrid), if you use it as DataGrid you must load the grid with data from the database file. See the code in the form (Form1). You can edit the grid without loading data. See the code in the form (Form2). Some properties and methods of my ActiveX are in the following table:

Method/Property	Definition	Example
DatabaseName	Set database name	FDGrid1.DatabaseName = FileName
DataSource	Set Recordset to grid	FDGrid1.DataSource = rs
AddNewRow	Add new record to grid	FDGrid1.AddNewRow
DeleteRow	Delete record	FDGrid1.DeleteRow
Update	Save record after add	FDGrid1.Update
CancelUpdate	Cancel update	FDGrid1.CancelUpdate
MoveFirst	Move to first record	FDGrid1.MoveFirst
MoveLast	Move to last record	FDGrid1.MoveLast
MoveNext	Move to next record	FDGrid1.MoveNext
MovePrevious	Move to previous record	FDGrid1.MovePrevious

Other Properties and Methods as (MSFlexGrid) control.

To use my ActiveX (FDGrid), you must add only one file from files: "Microsoft DAO 3.51 (or 3.6) Object Library" to the reference and add (FDGrid) control to the Toolbox.

Using the Code

Form1 (connect to the database file and use ActiveX as MSDataGrid)

LoadData() procedure:

Dim MyDataFile As String
Dim MyDb As Database
Dim MySql As String

   MyDataFile = App.Path + "\DataFile\" + "Sale.mdb"
   Set MyDb = OpenDatabase(MyDataFile, False, False, ";pwd=" & "")
   MySql = "SELECT * FROM Products Order by ProductID"
   FDGrid1.DatabaseName = MyDataFile
   FDGrid1.RecordSource = MySql
   FDGrid1.RecordsetType = vbRSTypeDynaset
   FDGrid1.Refresh

Form_Load() procedure:

'Call LoadData procedure
LoadData

cmdAdd_Click() procedure:

' add new record to data base file
FDGrid1.AddNewRow

cmdCancel_Click() procedure:

' don't save record
FDGrid1.AddNewRow

cmdDelete_Click() procedure:

' delete record from data base file
FDGrid1.DeleteRow

cmdUpdate_Click() procedure:

' save record to data base file
FDGrid1.Update

Refer to Form1 to see code for MoveFirst, MoveLast, MoveNext and MovePrevious.

Form2 (use ActiveX to edit grid)

LoadData() procedure:

FDGrid1.Cols = 8 'grid has 8 columns
FDGrid1.Rows = 15 'grid has 15 rows

'set alignment of fixed row to center
For c = 1 To FDGrid1.Cols - 1
   FDGrid1.TextMatrix(0, c) = "Col " & CStr(c)
   FDGrid1.ColAlignmentHeader(c) = flexAlignCenterCenter
Next c

' fill some rows
For r = 1 To 5
   For c = 1 To FDGrid1.Cols - 1
      FDGrid1.TextMatrix(r, c) = "Cell(" & CStr(r) & "," & CStr(c) & ")"
   Next c
Next r

' You can edit any cell, just click any cell then try to edit it.

Remarks

When extracting the FDGrid.zip file, you can find the FDGrid.ocx file in the ActiveXcontrol folder.

Find the database file Sale.mdb in the DataFile folder.

Find the prjBoundFlex project (to test the ActiveX control) in the FDGrid folder.

This project has three forms (frmMain, Form1 and Form2).

• Form1 is to connect grid with database file.
• Form2 is to edit grid.

Last Words

I hope this article is useful and helps you when your application needs to connect with the database or needs to edit grid. Please tell me if you have any ideas or if you find any problems. Thanks to Code Project and thanks to all.

History

• 12^th May, 2008: Initial post

Mostafa Kaisoun
M_Kaisoun@hotmail.com