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Create Dynamic Range in Excel

The code below takes the data from the S column and grabs all the data
and graphs it. The problem is this example grabs 500 cells worth of
data and some of these cells = nothing. How do I rescope a range to
prevent the data that is = nothing not to display....

Dim app As New Excel.Application
' app.Visible = True
Dim Doc As Excel.Workbook =
Dim Sheet As Excel.Worksheet = Doc.Sheets(1)
app.DisplayAlerts = False

Dim r As Excel.Range = app.Selection
Dim s As String
Dim int As Integer
For j As Integer = 1 To 500
s = r(j, 1).value
' txtImport.Text &= s & vbTab
If s = String.Empty Or s = Nothing Or s = " " Then
int = j
Exit For
End If

Dim Chart As Excel.Chart = Doc.Charts.Add(, Sheet)
Chart.Name = "TX Graph"

Chart.ChartType = Excel.XlChartType.xlLine.xlLine

' Copy the chart to a PictureBox on this form, using the

' Retrieve the picture.
Dim ChartImage As Image =
CType(Clipboard.GetDataObject().GetData(DataFormat s.Bitmap), Bitmap)

' Shrink the picture to fit the form.
Dim ScalingRatio As Single = PictureBox1.Width /
ChartImage = ChartImage.GetThumbnailImage(ChartImage.Width *
ScalingRatio, ChartImage.Height * ScalingRatio, Nothing, Nothing)

PictureBox1.Image = ChartImage

' Modify the chart so it appears alongside the Excel table,
' instead of in a separate window.
' Chart.Location(Excel.XlChartLocation.xlLocationAsO bject,

Nov 21 '05 #1
  • viewed: 2408

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