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Himal Patel
230
Object reference null error occur when we double click on WinToolbar
posted

Hi

We have windows form application and we have create a base class for every form and in that base class we create WinToolbar. whenever i click on my Application Form icon on left side this gives me below error.



Error Details:
System.NullReferenceException: Object reference not set to an instance of an object.
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.Infragistics.Win.UltraWinToolbars.IToolbarsManager.ResolveFormBorderAppearance(AppearanceData& appearance, AppearancePropFlags& requestedProps)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsDockAreaResizeUIElement.InitAppearance(AppearanceData& appearance, AppearancePropFlags& requestedProps)
   at Infragistics.Win.UIElement.InitializeDrawAppearance(AppearanceData& defaultAppearance, AppearanceData& appearance)
   at Infragistics.Win.UIElement.DrawElement(UIElementDrawParams& defaultDrawParams)
   at Infragistics.Win.UIElement.DrawChildElements(UIElementDrawParams& drawParams)
   at Infragistics.Win.UIElement.DrawElement(UIElementDrawParams& defaultDrawParams)
   at Infragistics.Win.UIElement.DrawHelper(Graphics graphics, Rectangle invalidRectangle, Boolean doubleBuffer, AlphaBlendMode alphaBlendMode, Boolean clipText, Boolean forceDrawAsFocused, Boolean preventAlphaBlendGraphics)
   at Infragistics.Win.ControlUIElementBase.Draw(Graphics graphics, Rectangle invalidRectangle, Boolean doubleBuffer, AlphaBlendMode alphaBlendMode, Size elementSize, Boolean preventAlphaBlendGraphics)
   at Infragistics.Win.ControlUIElementBase.Draw(Graphics graphics, Rectangle invalidRectangle, Boolean doubleBuffer, AlphaBlendMode alphaBlendMode)
   at Infragistics.Win.UltraControlBase.OnPaint(PaintEventArgs pe)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsDockArea.OnPaint(PaintEventArgs pe)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   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)
  • 2575
    Offline posted

    Hello,

    I cannot reproduce the issue with the information you have provided. Please provide a small, isolated sample which reproduces the issue, which will allow me to see how the UltraToolBarsManager is implemented and investigate why this issue is occurring.