[ChartFX 6.2 Resource Center NullReference Exception navigating between Annotation examples]

Also please note that.. This only happens on Windows 7 and Windows Vista

[ChartFX 6.2 Resource Center NullReference Exception navigating between Annotation examples]

I am using version 6.2.3188.26800

Thanks,

Prayag

[NullReference Exception on Windows 7 and Windows Vista]

Frank,

Attached is the sample app that reproduces the issue on Windows 7... Please navigate between Exmaple 1 and Exmaple 2 code few times and you should see the exception...

Thanks.

Prayag

[ChartFX 6.2 Resource Center NullReference Exception navigating between Annotation examples]

Something interesting happened when I was browsing ChratFX 6.2 resource center on my computer. I got the exact same exception(Null reference exception) when I navigated to example Annotation Group Sample under Annotations in Interactive Samples.

I have been trying to figure out why I get this exception in my application for long time now. Hope this gives you enough information to take it to your developers.

I have attached the screen shot of the exception.

Please review it and let us know what the fix is

[NullReference Exception on Windows 7 and Windows Vista]

Dear SoftwareFX,

We are using ChartFX for .NET version 6.2 with all the latest updates in our application. We have been struggling with the following error for a year now and we cannot seem to trace the problem. Based on exception we know that it's an internal error to ChartFX. It is expecting us to supply something concrete and we are not doing that. Please note that though this exception only happens on Windows 7 and Windows Vista. On Windows XP we never see this issue. No code change happens between different versions.

Here is the stack trace of an error and an exception. Any help on this issue is greatly appreciated.

************** Exception Text **************

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.

at SoftwareFX.ChartFX.Annotation.AnnotationList.0O(IGraphicsEx AQ, Rectangle AR, Boolean AS, Boolean AT, Int32 AU, Int32 AV)

at SoftwareFX.ChartFX.Annotation.AnnotationX.24(IGraphicsEx F3, Rectangle F4, Boolean F5, Int32 F6, Int32 F7)

--- End of inner exception stack trace ---

at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

at SoftwareFX.ChartFX.ExtensionManager.MI(19 2CA, Enum 2CB, Object[] 2CC)

at SoftwareFX.ChartFX.ChartCore.EP(1R 1T1, Boolean 1T2, Boolean 1T3)

at SoftwareFX.ChartFX.ChartCore.EO(1R 1SY, Rectangle& 1SZ, Int32& 1T0)

at SoftwareFX.ChartFX.ChartCore.EN(PaintBar 1SV, IGraphicsEx 1SW, Rectangle& 1SX)

at SoftwareFX.ChartFX.0X.OnPaint(PaintEventArgs e)

at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)

at System.Windows.Forms.Control.WmPaint(Message& m)

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Thanks,

[Exception when drawing chart]

 Hi Juan,

Thanks for the quick reply.  Here is the code...

• Sub Routine That draws the chart

  Public Sub DrawCharts(ByVal uDate As String)
  If mLocked Then Return
  Try

  GetAdditionInfo()
  poly = Nothing
  CurrentDate = uDate
  UserPointSerie = CInt(IIf(UserPoints.Count > 0, 1, 0))
  'Chart.ClearData(

ClearDataFlag.AllData)

  Chart.Extensions.Clear()
  ClearChartStuff()
  'ClearChart()
  Try
  Dim obj As Object = CType(Graph.Axis(1), snAxis).curves(0)
  Catch tEx As Exception

  MsgBox(tEx.ToString())
  Exit Sub
  End Try

  '  Chart.Style = ChartStyle.All

  Chart.DataEditor = IIf(mWorkNormalize, False, Graph.DataEditor)

  Chart.ShowTips = True
  Chart.Highlight.Enabled = bHighlight
  Chart.ToolBar = False
  Chart.Gallery = Gallery.Lines

  SetAttributes()
  PassData()


  Set3DView()

  '   SetAttributes()

  DrawBorder()
  DrawBackground()
  DrawBorder()
  DrawTitles()
  DrawLegend()

  DrawGridLines()
  DrawAnnotations()
  DrawLines()
  DrawStripes()
  DrawTrendPoints()
  DrawDynamicAnnotations()

  Catch ex As Exception

  Console.WriteLine("Epa: " & ex.Message)
  End Try
  UpdateToolbar()
  End Sub

• Sub Routine to clear chart. 
  Public Sub ClearChartStuff()
    Chart.ClearData(ClearDataFlag.Data)
  
    'Chart.ClearData(ClearDataFlag.Extensions)
    Chart.ClearData(ClearDataFlag.IniValues)
    Chart.ClearData(ClearDataFlag.Stripes)
    Chart.ClearData(ClearDataFlag.XValues)
    Chart.ClearData(ClearDataFlag.Values)
  
    'Chart.ClearData(ClearDataFlag.ConstantLines)
    Chart.ClearData(ClearDataFlag.Labels)
    'Chart.ClearData(ClearDataFlag.ColorsAndPatterns)
    'Chart.ClearData(ClearDataFlag.Commands)
  
    Chart.ClearData(ClearDataFlag.Other)
    Chart.ClearData(ClearDataFlag.Strings)
    Chart.ClearData(ClearDataFlag.Titles)
    End Sub
  
  
  
• Following Sub Routine draws the Annotations...

 Public Sub DrawAnnotations()
  Try

  If Not (Graph.AnnotationsShow Or Graph.StickyNoteShow) Then
  Exit Sub
  End If
  Dim i As Integer
  '#If _cfx70 Then

  'Dim annotations As Annotations = New Annotations
  '#Else
  Dim annotations As AnnotationX = New AnnotationX
  '#End If
  Dim balloon As AnnotationBalloon

  Dim note As snStickyNote
  Dim anno As snAnnotation
  Dim text As String
  Dim x1, x2 As Double


  'poly = New AnnotationPolygon

  '' this hold the polygon to draw Lines and Rects when zooming


  'jnaPts = New ArrayList
  'poly.Border.Color = Color.Black
  'poly.Border.Style = Drawing2D.DashStyle.Dash
  'poly.Border.Width = 0


  'annotations.List.Add(poly)



  If Graph.StickyNoteShow Then
  For i = 0 To Graph.StickyNotes.Count - 1
  Try
  note = Graph.StickyNotes(i)
  If note.Text <> "" Then

  text = note.Text
  text = ReplaceText(text)
  balloon = New AnnotationBalloon
  balloon.Text = text
  balloon.Shadow = 3

  note.balloon = balloon
  If note.ValueOption.StartsWith("P") Then
  balloon.Left = CInt(note.x)
  balloon.Top = CInt(note.y)

  Else
  Dim x As Double
  If bIsDate Then
  x = jnaUtil.DateFns.StringToDate(note.x).ToOADate

  Else
  x = jnaUtil.StringFns.Number(note.x, 0.0)
  End If
  balloon.Attach(x, jnaUtil.StringFns.Number(note.y, 0.0))

  End If

  balloon.TextColor = plotStuff.GetColor(note.TextColor)
  balloon.TailCorner = CInt(plotStuff.TailPosition(note.TailPosition))

#If Not _cfx70 Then
  balloon.ArrowFactor = CInt(plotStuff.TailSize(note.TailSize))
#End If
  balloon.Border.Color = System.Drawing.Color.Black
  balloon.Color = plotStuff.GetColor(note.BGColor)


  balloon.SizeToFit()
  annotations.List.Add(balloon)
  End If
  Catch e As Exception
  MsgBox("jna 111 " & e.Message)

  End Try
  Next i
  End If


  Dim label As AnnotationText

  If Graph.AnnotationsShow Then
  Dim bWidth As Boolean



  For i = 0 To Graph.Annotations.Count - 1
  anno = CType(Graph.Annotations(i), snAnnotation)
  Try
  If anno.Text.StartsWith("OVS:") And anno.X1.StartsWith("OVS:") And anno.Y1.StartsWith("OVS:") Then

  Dim n, j As Integer
  Dim dt As DataTable
  Dim dc As New DataCenter.DataCenter.clsDC
  Dim vText, vXValue, vYValue As String

  Dim xx, yy, ttext As Object

  vText = anno.Text.Substring(4)
  vXValue = anno.X1.Substring(4)
  vYValue = anno.Y1.Substring(4)

  dt = dc.SelectData("", vText, vXValue, vYValue)
  n = dt.Rows.Count
  If n > 0 Then
  For j = 0 To n - 1

  Try
  label = New AnnotationText
  anno.label = label
  xx = dc.GetValue(dt, vXValue, j, Now)

  yy = dc.GetValue(dt, vYValue, j, 0.0)
  ttext = dc.GetValue(dt, vText, j, "")

  label.Text = ttext

  label.TextColor = plotStuff.GetColor(anno.Color)
  label.Color = System.Drawing.Color.Transparent
  label.Border.Color = System.Drawing.Color.Transparent

  label.Orientation = plotStuff.AnnoOrientation(anno.Orientation)
  label.Align = StringAlignment.Near
  label.WordWrap = anno.WordWrap

  If bIsDate Then
  x1 = jnaUtil.DateFns.StringToDate(xx).ToOADate
  Else
  x1 = xx

  End If

  label.SizeToFit()

  label.Attach(x1, yy)

  annotations.List.Add(label)

  Catch
  End Try
  Next
  End If
  Else

  label = New AnnotationText

  anno.label = label
  label.Text = ReplaceText(anno.Text)
  label.TextColor = plotStuff.GetColor(anno.Color)
  label.Color = System.Drawing.Color.Transparent

  label.Border.Color = System.Drawing.Color.Transparent
  label.Orientation = CInt(plotStuff.AnnoOrientation(anno.Orientation))
  label.WordWrap = anno.WordWrap


  bWidth = True

  If anno.x2 = "" Then
  label.Width = 200
  label.Height = 100

  bWidth = False
  End If

  If anno.ValueOption.StartsWith("P") Then
  label.Left = jnaUtil.StringFns.Number(anno.X1, 0)

  label.Top = jnaUtil.StringFns.Number(anno.Y1, 0)
  If bWidth Then
  label.Width = jnaUtil.StringFns.Number(anno.x2, 0)

  label.Height = jnaUtil.StringFns.Number(anno.Y2, 0)
  End If
  Else
  If bIsDate Then
  x1 = jnaUtil.DateFns.StringToDate(anno.X1).ToOADate

  If bWidth Then x2 = jnaUtil.DateFns.StringToDate(anno.x2).ToOADate
  Else
  x1 = anno.X1
  x2 = anno.x2

  End If
  If bWidth Then
  label.Attach(x1, jnaUtil.StringFns.Number(anno.Y1, 0.0), x2, jnaUtil.StringFns.Number(anno.Y2, 0.0))

  Else
  label.Attach(x1, jnaUtil.StringFns.Number(anno.Y1, 0.0))
  End If
  End If
  label.SizeToFit()

  annotations.List.Add(label)
  End If
  Catch e As Exception
  MsgBox("show ")
  End Try

  Next
  End If

  mUserAnnotations = annotations.List.Count

  'The following might not be necessary after we upgrade to Chart FX 6.2 version 6.2.3188.*
  ' looking to fix vista

  If mUserAnnotations > 0 Then
  Chart.Extensions.Add(annotations)
  End If
  Catch ex As Exception
  MsgBox(ex.ToString())
  End Try
  End Sub

-

[Exception when drawing chart]

Were you able to find solution to this problem? It's very convenient that SoftwareFX has nothing to say on this.

[Chart FX 6.2 Compatibility with Vista and Windows 7]

 Randy,

 We traced this issue to Annotations. If we add annotations to Chart in Windows Vista the chart throws internal exception when rendering. I hope this helps.

 Let me know if you can find some solution to this problem.

 Thanks, Prayag

[Chart FX 6.2 Compatibility with Vista and Windows 7]

Randy,

We are rendering the chart as an image. Right now our software only runs on Windows XP. We are trying to upgrade it for Windows Vista and for Windows 7. And we have run into problem with those..

Thanks,

Prayag

[Red X in Chart FX 6.2 on Windows Vista]

Hi Randy,

Sorry for late message. But yes the behavior only happens in Vista and we want to find out how we can prevent it..

Thanks,

prayag

[Red X in Chart FX 6.2 on Windows Vista]

Hi Randy, So when does Chart FX 6.2 shows Red X through the chart. This happens a lot on Windows Vista machine. None of my chart shows up properly on it. Thanks, Prayag

[Chart FX 6.2 Compatibility with Vista and Windows 7]

Hi Randy,

So when does Chart FX 6.2 shows Red X through the chart. This happens a lot on Windows Vista machine. None of my chart shows up properly on it.

Thanks,

Prayag

[Chart FX 6.2 Compatibility with Vista and Windows 7]

This is a repost again. I have asked this question before but have not received any answer yet. Would you please let me know if Chart FX 6.2 is compatible with Vista and Windows 7.

Thanks,

Prayag Gandhi

[Inverted Logbase10 Y Axis]

When I set my AxisY Inverted property to true and set the LogBase to 10 Chart looses Labels and tick marks for Y axis. Is it a known bug? Is there a workaround for this problem?

Any help is appreciated. I tried this on Chart in the design mode and programmatically and same results both times.

Thanks,Prayag Gandhi