print graphic [modified]

[codeadair]

I write a program to print an undee chart.The main code as follows: Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click AddHandler PrintDocument1.PrintPage, AddressOf drawpictoprinter PrintDocument1.Print() End Sub Private Sub drawpictoprinter(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Dim pg As Graphics pg = e.Graphics pg.TranslateTransform(xtran, ytran) 'xtran,ytran >0 pg.ScaleTransform(xscaletran, yscaletran) Dim j As Integer Try For j = 0 To rwrecord - 1 'rwrecord is the unbound of 'array redraw or ydraw pg.DrawLine(redrawpen, xredraw(j), -yredraw(j), xredraw(j + 1), -yredraw(j + 1)) Next Catch ex As Exception Throw ex Finally pg = Nothing GC.Collect() End Try End Sub when i press button5 the first time.what do you think the output chart of printer?And the second time?The third time?.... When i do it the first time.Output chart is an undee chart that i want to be.But the second time when i do it.Two undee chart appear.and One is upper,the other is under it.The horizontal distance is xtran,The vertical distance is ytran. I do think the focus is pg.TranslateTransform(xtran, ytran) and pg.ScaleTransform(xscaletran, yscaletran) I run the program step by step.what i found are: 1>when i press button5 the first time.drawpictoprinter method execute one time 2>When i do it the second time.drawpictoprinter method execute two times 3> And so on WHY? Any care will be appreciated much Best regards ICQ:258-235-734 MSN:msnadair@hotmail.com -- modified at 9:19 Friday 2nd June, 2006

[Robert Rohde]

codeadair wrote:

AddHandler PrintDocument1.PrintPage, AddressOf drawpictoprinter

This is causing it. You are adding the event handler everytime you press your button. Either unbind (RemoveHandler) it after you have finished or make sure you bind it only once.