Error in Pie Chart

[daviddam]

I recently upgraded to a newer build (0.8.3069.27327), and I now am getting an error when displaying a pie chart.  I tracked down the problem to when I am creating the series.  Due to the nature of the program, the chart type is not necessarily known so the code is blindly setting the series BindingPath and BindingPathX properties.  In previous builds, this did not cause a problem with the pie chart.  Obviously, I will add code to handle this situation, but I thought I would share what I have found in case anyone else runs into this problem.  I recognize that the BindingPathX is not needed for single-value charts (pie, pyramid, and doughnut), but I don't think the control should blow up if the property is set.

System.NullReferenceException: Object reference not set to an instance of an object.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

at ChartFX.WPF.Axis.ak()

at ChartFX.WPF.Chart.a(Boolean A_0)

at ChartFX.WPF.Chart.ax()

at ChartFX.WPF.Chart.MeasureOverride(Size constraint)

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

at System.Windows.ContextLayoutManager.UpdateLayout()

at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)

at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()

at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()

at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)

at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

 

Some times there is an additional error message that comes up after the first one.  If the second one appears, the app goes down. 

System.NullReferenceException: Object reference not set to an instance of an object.

at ChartFX.WPF.Axis.ak()

at ChartFX.WPF.Chart.a(Boolean A_0)

at ChartFX.WPF.Chart.ax()

at ChartFX.WPF.Chart.MeasureOverride(Size constraint)

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)

at System.Windows.UIElement.Measure(Size availableSize)

at System.Windows.ContextLayoutManager.UpdateLayout()

at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)

at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()

at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()

at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)

at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

at System.Windows.Threading.DispatcherOperation.InvokeImpl()

at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)

at System.Threading.ExecutionContext.runTryCode(Object userData)

at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Windows.Threading.DispatcherOperation.Invoke()

at System.Windows.Threading.Dispatcher.ProcessQueue()

at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)

at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)

at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)

at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)

at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)

at System.Windows.Threading.Dispatcher.Run()

at System.Windows.Application.RunInternal(Window window)

at System.Windows.Application.Run(Window window)

at System.Windows.Application.Run()

at Desktops.App.Main()

at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)

at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)

at System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)

at System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()

at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)

at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)

at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()

at System.Threading.ThreadHelper.ThreadStart_Context(Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ThreadHelper.ThreadStart()

 

 

[daviddam]

I just realized I was using the older version of the DLL.   However, the error still occurs in build 0.8.3111.29088.

[JuanC]

We were unable to reproduce this issue, are you setting BindingPathX with an existing CLR property in your pie chart?

We would appreciate if you can post or send us a small sample (XAML + code) that duplicates this issue.

Regards,

 JuanC