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NullReferenceException when adding Annotations to chart


jbloomer
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I can add annotations to a scatter chart. I then want to reuse the chart and so do:

this.chart1.ClearData(SoftwareFX.ChartFX.ClearDataFlag.AllData);
this.chart1.Extensions.Clear();

but when I add another annotation I get the following exception:(Running on Vista and .Net 1.1)

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.MH(19 2BV, Enum 2BW, Object[] 2BX)
at SoftwareFX.ChartFX.ChartCore.EO(1R 1SM, Boolean 1SN, Boolean 1SO)
at SoftwareFX.ChartFX.ChartCore.EN(1R 1SJ, Rectangle& 1SK, Int32& 1SL)
at SoftwareFX.ChartFX.ChartCore.EM(PaintBar 1SG, IGraphicsEx 1SH, Rectangle& 1SI)
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)

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  • 8 months later...

Hi jbloomer

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

 

When you try to add the annotation to the chart, does the chart contains any data?  You are removing the data from the chart (this.chart1.ClearData(SoftwareFX.ChartFX.ClearDataFlag.AllData)) and maybe you are attaching the annotation to some specific point.  Please verify this.

 

If you continue with issues, please contact Software FX Support at support[at]softwarefx.com.  Please attach a simple project showing the issue.

 

-- Pipon

 

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