How To Use the Chart Web Component with Visual Basic

This article was previously published under Q235885
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This article provides an overview of how you can use the Office Chart Web Component on a Visual Basic form to visualize related data. More specifically, the code in this article illustrates by example how to do the following:
  • Use array data for a chart.
  • Use an ADO recordset for chart data.
  • Use spreadsheet data for a chart.
  • Create multiple charts in a single chartspace.
  • Create a combination chart.-and-

  • Format different chart components such as axes, datalabels, series, plotareas and more.

Steps to Create Sample

  1. Start a new Standard EXE project in Visual Basic. Form1 is created by default.
  2. Click Components on the Project menu. Select Microsoft Office Web Components 9.0 and click OK.
  3. Add the following controls to the form with the properties indicated:

    CommandButtonCommand1Use Arrays
    CommandButtonCommand2Use ADO Recordset
    CommandButtonCommand3Use Spreadsheet

    NOTE: Size the ChartSpace control on your form so that it takes up as much of the form as possible while still allowing for the other controls on the form.
  4. Add the following code to the module of Form1:
    Private Sub Command1_Click()    'Create arrays for the x-values and the y-values    Dim xValues As Variant, yValues1 As Variant, yValues2 As Variant    xValues = Array("Beverages", "Condiments", "Confections", _                    "Dairy Products", "Grains & Cereals", _                    "Meat & Poultry", "Produce", "Seafood")    yValues1 = Array(104737, 50952, 78128, 117797, 52902, 80160, 47491, _                     62435)    yValues2 = Array(20000, 15000, 36000, 56000, 40000, 18000, 20000, _                     33000)        'Create a new chart    Dim oChart As WCChart    ChartSpace1.Clear    ChartSpace1.Refresh    Set oChart = ChartSpace1.Charts.Add        'Add a title to the chart    oChart.HasTitle = True    oChart.Title.Caption = "Sales Per Category"        'Add a series to the chart with the x-values and y-values    'from the arrays and set the series type to a column chart    Dim oSeries As WCSeries    Set oSeries = oChart.SeriesCollection.Add    With oSeries        .Caption = "1995"        .SetData chDimCategories, chDataLiteral, xValues        .SetData chDimValues, chDataLiteral, yValues1        .Type = chChartTypeColumnClustered    End With        'Add another series to the chart with the x-values and y-values    'from the arrays and set the series type to a line chart    Set oSeries = oChart.SeriesCollection.Add    With oSeries        .Caption = "1996"        .SetData chDimCategories, chDataLiteral, xValues        .SetData chDimValues, chDataLiteral, yValues2        .Type = chChartTypeLineMarkers    End With        'Add a value axis to the right of the chart for the second series    oChart.Axes.Add oChart.Axes(chAxisPositionLeft).Scaling, _        chAxisPositionRight, chValueAxis    'Format the Value Axes    oChart.Axes(chAxisPositionLeft).NumberFormat = "$#,##0"    oChart.Axes(chAxisPositionRight).NumberFormat = "0"    oChart.Axes(chAxisPositionLeft).MajorUnit = 20000    oChart.Axes(chAxisPositionRight).MajorUnit = 20000        'Show the legend at the bottom of the chart    oChart.HasLegend = True    oChart.Legend.Position = chLegendPositionBottomEnd SubPrivate Sub Command2_Click()    'Set up the DataSourceControl for the Chartspace    Dim rsd As RecordsetDef    DataSourceControl1.ConnectionString = _        "DRIVER={Microsoft Access Driver (*.mdb)}; " & _        "DBQ=C:\Program Files\Microsoft Visual Studio\VB98\nwind.mdb"    Set rsd = DataSourceControl1.RecordsetDefs.AddNew( _             "Select * from [Category Sales for 1995]", 3)    With ChartSpace1        .Clear        .Refresh        .DataSource = DataSourceControl1        .DataMember = rsd.Name    End With         'This Chartspace will contain 2 charts. Make the layout so that the    'charts are positioned horizontally    ChartSpace1.ChartLayout = chChartLayoutHorizontal        'Create a new bar chart from the query    Dim oBarChart As WCChart    Set oBarChart = ChartSpace1.Charts.Add    With oBarChart        .Type = chChartTypeBarClustered        .SetData chDimCategories, 0, 0  'Categories are first field        .SetData chDimValues, 0, 1      'Values are second field            'Format the value axis for the bar chart so that it        'shows values in thousands (i.e., 45000 displays as 45) and        'in increments of 25000. Remove the gridlines        With .Axes(chAxisPositionBottom)            .NumberFormat = "0,"            .MajorUnit = 25000            .HasMajorGridlines = False        End With                'Change the color of the series and the plot area        .SeriesCollection(0).Interior.Color = RGB(150, 0, 150)        .PlotArea.Interior.Color = RGB(240, 240, 10)    End With        'Create a new exploded pie chart from the query    Dim oPieChart As WCChart    Set oPieChart = ChartSpace1.Charts.Add    With oPieChart        .Type = chChartTypePie        .SetData chDimCategories, 0, 0  'Categories are first field        .SetData chDimValues, 0, 1      'Values are second field        .SeriesCollection(0).Explosion = 20                'Add a legend to the bottom of the pie chart        .HasLegend = True        .Legend.Position = chLegendPositionBottom                'Add a title to the chart        .HasTitle = True        .Title.Caption = "Sales by Category for 1995"        .Title.Font.Bold = True        .Title.Font.Size = 11                'Make the chart width 50% the size of the bar chart's width        .WidthRatio = 50                'Show data labels on the slices as percentages        With .SeriesCollection(0).DataLabelsCollection.Add            .HasValue = False            .HasPercentage = True            .Font.Size = 8            .Interior.Color = RGB(255, 255, 255)        End With            End With    End SubPrivate Sub Command3_Click()   'Dynamically add a spreadsheet control to the form   Dim oSheet As Spreadsheet   Me.Controls.Add "OWC.Spreadsheet", "Sheet"   Set oSheet = Me!Sheet      'Fill the Sheet with data   With oSheet        .Range("A1:A10").Formula = "=Row()"        .Range("B1:B10").Formula = "=A1^2"        .Range("A12").Formula = "=Max(A1:A10)"        .Range("B12").Formula = "=Max(B1:B10)"   End With      'Create an xy-scatter chart using the data in the spreadsheet   Dim oChart As WCChart   With ChartSpace1        .Clear        .Refresh        .DataSource = oSheet.object        Set oChart = .Charts.Add        oChart.Type = chChartTypeScatterSmoothLineMarkers        oChart.SetData chDimXValues, 0, "a1:a10"        oChart.SetData chDimYValues, 0, "b1:b10"   End With      With oChart        'Display the Axes Titles and        'set the major units for the axes        With .Axes(chAxisPositionBottom)            .HasTitle = True            .Title.Caption = "X"            .Title.Font.Size = 8            .MajorUnit = 1        End With        With .Axes(chAxisPositionLeft)            .HasTitle = True            .Title.Caption = "X Squared"            .Title.Font.Size = 8            .MajorUnit = 10        End With                'Set the maximum and minimum axis values        .Scalings(chDimXValues).Maximum = oSheet.Range("A12").Value        .Scalings(chDimXValues).Minimum = 1        .Scalings(chDimYValues).Maximum = oSheet.Range("B12").Value                'Change the marker and line styles for the series        With .SeriesCollection(0)            .Marker.Style = chMarkerStyleDot            .Marker.Size = 6            .Line.Weight = 1            .Line.Color = RGB(255, 0, 0)        End With   End With      'Remove the spreadsheet   Me.Controls.Remove "Sheet"   End Sub					
    NOTE: You might need to modify the connection string in the Command2_Click event so that it correctly refers to the path of NWIND.MDB, which is installed to the Visual Basic directory by default:
       DataSourceControl1.ConnectionString = _        "DRIVER={Microsoft Access Driver (*.mdb)}; " & _        "DBQ=C:\Program Files\Microsoft Visual Studio\VB98\nwind.mdb"					
  5. Click Properties on the Project menu. Select the Make tab, deselect Remove Information about Unused ActiveX Controls and click OK.
  6. Press the F5 key to run the program.
  7. Click the Use Arrays button. A combination chart with two value axes is created. The chart uses data from arrays.
  8. Click the Use ADO Recordset button. Two charts are created in the Chartspace; a bar chart and an exploded pie chart with data labels. The Chartspace uses a DataSourceControl for its data and the DataSourceControl references an Access database through an ADO connection.
  9. Click the Use Spreadsheet button. A scatter chart is created that uses a Spreadsheet control with formulas in the cells as its data. The Spreadsheet control is dynamically added and removed at run time.
owc chart space charting graph graphing

Article ID: 235885 - Last Review: 07/13/2004 14:56:20 - Revision: 1.1

Microsoft Office Chart Component 9.0, run time

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