Printing a DesktopListBox

General
1

I have created a class based on printer setup.

I pass a DesktopListBox into the class so that I can loop through the records and print them using the graphics from ShowPrinterDialog.

The DesktopListBox can contain in the order of 10,000 rows.

Printing works fine when I print only one page of rows but with a large quantity of pages it does not obtain the row data correctly. In fact it does not obtain the data at all.

When looping through the DesktopListBox rows if I use myListBox.ScrollPosition = n (loop index) before obtaining the row data then the data is returned correctly even for 10,000 rows.

Can someone point me in the right direction please.

Thanks

Terry

2

What code do you perform in the list box mousewheel event and the cell paint events?

3

Nothing in the mousewheel event

PaintCellBackground

If Not Me.RowSelectedAt(row) Then
If Color.IsDarkMode Then
g.ClearRectangle(0.0, 0.0, g.Width, g.Height)
End If
If row Mod 2 = 1 Then
g.DrawingColor = ColorGroup.NamedColor(“secondaryContentBackgroundColor”)
g.FillRectangle(0.0, 0.0, g.Width, g.Height)
End If
Return True
End If

PaintCellText

me.CellTextAt(row,column) = me.CellTagAt(row,column)

4

Found it, thanks for the pointer.

me.CellTextAt(row,column) = me.CellTagAt(row,column)

This is the culprit.

5

I have modified my printing class to accommodate both CellTextAt and CellTagAt

Thanks again