Overview of Excel Object Model ISYS 562

Excel’s Database Tools Lookup and Database functions: –VLookUp, D functions Data –Sort –Filter –Subtotals –Pivot table/Pivot chart OLAP: On Line Analytical Process DrillDown, RollUp –Import external data Import data New web query New database query ADO

Data/Import External Data New Database Query Select and click OK.

OLAP Cube Data/Import External Data/New database query: –Define query –In the last step, choose Create OLAP Cube

OLAP Wizard Source of data to be summarized Analysis dimensions

Web Query Data/Import External Data/New web query Click table on the web page Use the Save Query button to save web query Web query can be refreshed. Copy/Paste can not.

Import Data Data/Import External Data/Import Data

Excel Object Model

Excel Application –Workbooks/Workbook Worksheets –Worksheet »Range »Cells –Shapes »Drawing objects Charts »Chart User form

Workbooks Object Properties: –Count –Item Methods: –Add: Create a new, empty workbook –Open: This method opens an Excel file and creates a new workbook for the opened file. Workbooks.Open "c:\f.xls" –OpenDataBase: This method creates a new workbook and opens the database for import. Workbooks.OpenDatabase "C:\salesDB.mdb"

Workbook Object Properties: –ActiveChart, ActiveSheet –Charts, Sheets –ReadOnly, Password Methods: –Activate –RefreshAll –Save, SaveAs –Close

Worksheets Object Properties: –Count –Item Methods: –Add: –Delete: Worksheets("Sheet3").Delete –Copy –Move: Worksheets("Sheet1").Move after:=Worksheets("Sheet3") –Select

Worksheet Object Properties: –Cells –Columns: Worksheets("Sheet1").Columns(1).Font.Bold = True –ListObjects –Range –Rows: Worksheets("Sheet1").Rows(3).Delete –Shapes

Cells Cells(Index): –Index is cell’s sequence number. A1 – cells(1), B1 - Cells(2), C1 – cells(3). Cells(RowIndex, ColIndex) A1 – Cells(1,1), B3 – Cells(3, 2) Cells with no index: –All cells in a worksheet.

Cells Examples This example sets the font size for cell C5 on Sheet1 to 14 points: Worksheets("Sheet1").Cells(5, 3).Font.Size = 14 This example clears the formula in cell one on Sheet1: Worksheets("Sheet1").Cells(1).ClearContents Worksheets(1).Cells(1, 1).Value = 24 This example sets the font and font size for every cell on Sheet1 to 8-point Arial: With Worksheets("Sheet1").Cells.Font.Name = "Arial".Size = 8 End With The following example sets the formula for cell A2. ActiveSheet.Cells(2, 1).Formula = "=Sum(B1:B5)"

Cells with Loop This example loops through cells A1:J4 on Sheet1. If a cell contains a value less than 0.001, the example replaces that value with 0 (zero). For rwIndex = 1 to 4 For colIndex = 1 to 10 With Worksheets("Sheet1").Cells(rwIndex, colIndex) If.Value <.001 Then.Value = 0 End With Next colIndex Next rwIndex

Use ADO to Import A Table Private Sub CommandButton1_Click() Dim cn As ADODB.Connection Set cn = New ADODB.Connection cn.Open ("provider=microsoft.jet.oledb.4.0;data source=c:\salesDB.mdb;") Dim rs As ADODB.Recordset Set rs = New ADODB.Recordset rs.Open "select * from customer", cn, adOpenKeyset Dim i, j As Integer For i = 1 To rs.Fields.Count Sheet1.Cells(i) = rs.Fields(i - 1).Name Next i i = 2 Do While Not rs.EOF For j = 1 To rs.Fields.Count Sheet1.Cells(i, j) = rs.Fields(j - 1) Next j i = i + 1 rs.MoveNext Loop End Sub

Range Object Represents a cell, a row, a column, a selection of cells containing one or more contiguous blocks of cells, or a 3-D range.

Range Object Properties and Methods Properties: –CurrentRegion: The current region is a range bounded by any combination of blank rows and blank columns. –Formula –Value Methods: –Activate –AutoFormat –Clear –Delete –Select

Referring to a Range Use Range(arg), where arg names the range, to return a Range object that represents a single cell or a range of cells. The following example places the value of cell A1 in cell A5. –Worksheets("Sheet1").Range("A5").Value = 10 –Worksheets(“sheet1”).Range(“myRange”)=10 –Worksheets(“sheet1”).Range(“myRange”).Select The following example fills the range A1:H8 with random numbers by setting the formula for each cell in the range. When it’s used without an object qualifier (an object to the left of the period), the Range property returns a range on the active sheet. Use the Activate method to activate a worksheet before you use the Range property without an explicit object qualifier. –Worksheets("Sheet1").Activate –Range("A1:H8").Formula = "=Rand()"

Referring to a range as a collection of cells: –Cells.select, Cells(1).select –ActiveSheet.Cells(2, 1).Formula = "=Sum(B1:B5)" Referring to a range as collection of rows or columns: –Rows(2).select, Rows(“3:10”).select –Columns(3).select, Columns(“A:C”).select Referring to a range as current selection: –ActiveCell.CurrentRegion –Selection

Range Example Worksheets("faculty").Range("a1").Select ActiveCell.CurrentRegion.AutoFormat Format:=xlRangeAutoFormatClassic1 ActiveCell.CurrentRegion.Select MsgBox (Selection.Count)

Selection Property Returns the selected object in the active window, for an Application object, and a specified window, for a Windows object. The returned object type depends on the current selection (for example, if a cell is selected, this property returns a Range object). The Selection property returns Nothing if nothing is selected. Using this property with no object qualifier is equivalent to using Application.Selection. Example This example clears the selection on Sheet1 (assuming that the selection is a range of cells). Worksheets("Sheet1").Activate Selection.Clear

Workbook’s Charts Property Returns all chart sheets in the active workbook. –This example deletes every chart sheet in the active workbook. ActiveWorkbook.Charts.Delete –This example hides Chart1, Chart3, and Chart5. Charts(Array("Chart1", "Chart3", "Chart5")).Visible = False

Macro that Creates a Chart Sub CreateChart() Charts.Add ActiveChart.ChartType = xlColumnClustered ActiveChart.SetSourceData Source:=Sheets("faculty").Range("B1:C4"), PlotBy _ :=xlColumns ActiveChart.Location Where:=xlLocationAsNewSheet With ActiveChart.HasTitle = True.ChartTitle.Characters.Text = "Students".Axes(xlCategory, xlPrimary).HasTitle = True.Axes(xlCategory, xlPrimary).AxisTitle.Characters.Text = "Faculty".Axes(xlValue, xlPrimary).HasTitle = True.Axes(xlValue, xlPrimary).AxisTitle.Characters.Text = "Number of Students" End With End Sub

VBA Procedure that Creates a Chart Dim newChart As Chart Set newChart = Charts.Add With newChart.ChartType = xl3DColumn.SetSourceData Source:=Sheets("faculty").Range("B1:C4"), PlotBy _ :=xlColumns.Location Where:=xlLocationAsNewSheet.HasTitle = True.ChartTitle.Characters.Text = "Students".Axes(xlCategory, xlPrimary).HasTitle = True.Axes(xlCategory, xlPrimary).AxisTitle.Characters.Text = "Faculty".Axes(xlValue, xlPrimary).HasTitle = True End With

User Form

ListBox Properties: –RowSource: Source of listbox’s items. –ColumnCount: Number of columns in RowSource –BoundColumn: The column that contains the return value. Method: –ListBox1.AddItem ("customer")

SpinButton Max: Maximum value Min: Minimum value SmallChange: –Increment or decrement when click.

Pairing a Spinbutton with a Textbox Private Sub SpinButton1_Change() TextBox1.Text = SpinButton1.Value End Sub

OptionButton If OptionButton2 Then ListBox1.BoundColumn = 3 Else ListBox1.BoundColumn = 2 End If

ListBox RowSource

Code Example Private Sub UserForm_Activate() Worksheets("IntRate").Activate End Sub Private Sub SpinButton1_Change() TextBox1.Text = SpinButton1.Value End Sub Private Sub OptionButton1_Click() If OptionButton1 Then ListBox1.BoundColumn = 2 Else ListBox1.BoundColumn = 3 End If End Sub Private Sub OptionButton2_Click() If OptionButton2 Then ListBox1.BoundColumn = 3 Else ListBox1.BoundColumn = 2 End If End Sub

Private Sub ListBox1_Click() TextBox4.Text = ListBox1.Value End Sub Private Sub SpinButton1_Change() TextBox1.Text = SpinButton1.Value End Sub Private Sub CommandButton1_Click() Dim Term As Integer If OptionButton1 Then Term = 15 Else Term = 30 End If MsgBox (-Pmt(TextBox4.Value / 12, Term * 12, TextBox1.Value)) End Sub

MultiPage Control Properties: –Caption To add a new page: –Point to a page’s caption and right click, choose the New Page fom the context menu.

Events Workbook –VBE explorer: ThisWorkBook Open event –Private Sub Workbook_Open() UserForm1.Show –End Sub Worksheet –Activate event Private Sub Worksheet_Activate() UserForm1.Show End Sub