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                                  • SYMPTOMS
                                    You ran an XAF WinForms application with FormStyle = Ribbon and UIType = TabbedMdi, typed a text to search into the menu box corresponding to the built-in FullTextSearchAction or a custom ParametrizedAction. After you press Enter or click the Search button an error occurs with one of the following call stacks:

                                    Type:       NullReferenceException
                                    Message:    Object reference not set to an instance of an object.
                                    Data:       0 entries
                                    Stack trace:

                                       at DevExpress.XtraBars.Ribbon.ViewInfo.RibbonItemViewInfoCalculator.CalcEditItemViewInfo(Graphics graphics, RibbonItemViewInfo item)
                                       at DevExpress.XtraBars.Ribbon.ViewInfo.RibbonItemViewInfo.CheckViewInfo(Graphics graphics)
                                       at DevExpress.XtraBars.Ribbon.Drawing.RibbonItemPainter.DrawObject(ObjectInfoArgs e)
                                       at DevExpress.Utils.Drawing.ObjectPainter.DrawObject(GraphicsCache cache, ObjectPainter painter, ObjectInfoArgs e)
                                    ...

                                    Type:       ArgumentException
                                    Message:    Parameter is not valid.
                                    Data:       0 entries
                                    Stack trace:

                                       at System.Drawing.Graphics.get_PageUnit()
                                       at DevExpress.Utils.AppearanceObject.CalcDefaultTextSize(Graphics g)
                                       at DevExpress.XtraBars.Ribbon.ViewInfo.RibbonPageHeaderViewInfo.CalcBestHeight()
                                       at DevExpress.XtraBars.Ribbon.ViewInfo.RibbonViewInfo.CalcTabHeaderHeight()
                                       at DevExpress.XtraBars.Ribbon.ViewInfo.RibbonViewInfo.CalcConstants()
                                    ...

                                    As a result, a big red cross (X) is also drawn instead of the ribbon surface:




                                    SOLUTIONS

                                    Go to your Download Manager (or try a free trial) to migrate to v16.2.4 or later directly, which is the most preferred option here.  This issue has already been fixed by the XtraBars team: RibbonControl - NullReferenceException is thrown in the RibbonItemViewInfoCalculator.CalcEditItemViewInfo method 

                                    Please accept sincerely apologies from our XAF and XtraBars teams for all the inconvenience here.

                                0 Solutions

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