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• Dimitrij Wolf

  Posted on Oct 12, 2009 (permalink)

  Hi,
  
  i try to render WPF content with telerik chart-controls in VB6. This is possible if you are using the Microsoft Interop Forms Toolkit (http://msdn.microsoft.com/en-us/vbasic/bb419144.aspx). If i'm using the 2D controls everiting is fine. But if I switch to 3D I get a OutOfMemoryException or NullReferenceException.
  
  Here is my XAML:

  <UserControl x:Class="UserControl1"

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

  xmlns:charts="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Charting">

  <Grid>

  <charts:RadChart x:Name="MyChart"/>

  </Grid>

  </UserControl>

  
  This is the code-behind from the 2D version:
  

  Public Sub New()

  ' This call is required by the Windows Form Designer.

  InitializeComponent()

  ' Add any initialization after the InitializeComponent() call.

  MyChart.DefaultSeriesDefinition = New BarSeriesDefinition

  Dim itemSource As Double() = {5, 9, 17, 10, 11, 3, 12}

  MyChart.ItemsSource = itemSource

  End Sub

  
  And here is the code-behind from the 3D version:
  

  Public Sub New()

  ' This call is required by the Windows Form Designer.

  InitializeComponent()

  ' Add any initialization after the InitializeComponent() call.

  MyChart.DefaultSeriesDefinition = New Bar3DSeriesDefinition

  Dim itemSource As Double() = {5, 9, 17, 10, 11, 3, 12}

  MyChart.ItemsSource = itemSource

  AddHandler MyChart.DefaultView.ChartArea.Loaded, AddressOf Me.RadChart_Loaded

  End Sub

  Private Sub RadChart_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)

  Dim camera As New CameraExtension

  camera.SpinAxis = SpinAxis.XY

  camera.ZoomEnabled = True

  MyChart.DefaultView.ChartArea.Extensions.Add(camera)

  End Sub

  
  The same code works in a normal .NET-project and also in a WinForms-project on the ElementHost.
  
  Best regards,
  Dimi
  

  Reply

• Bartholomeo Rocca Master

  Posted on Oct 15, 2009 (permalink)

  Hello Dimi,
  
  This is one exotic setup you have here. It seems quite odd that your managed application is crashing with different kinds of exceptions on consecutive runs (NullReferenceException vs OutOfMemoryException). Also, as you have noted the same setup works seamlessly on the officially supported platforms (pure WPF setup and WinForms-hosted one) so I would suspect there is some problem with this particular toolkit when rendering 3D content. Have you verified the toolkit is capable of rendering generic WPF 3D content at all?
  
  
  Greetings,
  Bart.
  

  Reply


• Dimitrij Wolf

  Posted on Oct 15, 2009 (permalink)

  Hello Bart,
  
  the toolkit has no problems with other 3D staff. Everything I've tested works well. It only crashes with the 3D-charts.
  
  Best regards,
  Dimi

  Reply

• Dimitrij Wolf

  Posted on Feb 4, 2010 (permalink)

  Hello Everyone,
  
  I've solved the problem above. The .NET-Framework can't find the "Telerik.Windows.Controls.Charting.dll" in my setup. It works only if you put the assembly in the gac or if you're using the following methods at the beginning of your program (before using any chart):
  
  

  Private Sub LoadDependentAssemblies()

  Try

  Dim currentDomain As AppDomain = AppDomain.CurrentDomain

  AddHandler currentDomain.AssemblyResolve, AddressOf MyResolveEventHandler

  InstantiateTelerikAssemblies(currentDomain)

  RemoveHandler currentDomain.AssemblyResolve, AddressOf MyResolveEventHandler

  Catch ex As Exception

  'some error handling...

  End Try

  End Sub

  Private Sub InstantiateTelerikAssemblies(ByVal domain As AppDomain)

  Try

  ' create a dummy instance

  domain.CreateInstance("Telerik.Windows.Controls.Charting, Version=2009.3.1208.35, Culture=neutral, PublicKeyToken=5803cfa389c90ce7", "Telerik.Windows.Controls.RadChart")

  Catch e As Exception

  End Try

  End Sub

  Private Function MyResolveEventHandler(ByVal sender As Object, ByVal args As ResolveEventArgs) As [Assembly]

  Dim assemblyPath as String = "[the path of the assembly]"

  Return Assembly.LoadFrom(assemblyPath & "Telerik.Windows.Controls.Charting.dll"))

  End Function

  
  Best regards,
  Dimi
  

  Reply

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