RibbonControlLibrary中有问题

| 我在Microsoft的ѭ0中面临一个问题。我创建了一个简单的WPF应用程序,并使用
RibbonControlLibrary
在顶部创建了一个功能区栏。问题如下图所示。 问题是\“东西\”下的菜单仅扩展到左侧菜单中的所有项目,即Item1,Item2 ...如果我增加左侧菜单中的某个项目,我会得到 但菜单中某些菜单下缺少窗台项目。 下面是我正在使用的XAML
 <Ribbon:Ribbon ItemsSource=\"{Binding Path=CSIMRibbonTabs}\">
            <Ribbon:Ribbon.ApplicationMenu>
                <Ribbon:RibbonApplicationMenu CanUserResizeVertically=\"True\" ItemsSource=\"{Binding Path=MainItem}\">
                    <Ribbon:RibbonApplicationMenu.AuxiliaryPaneContent>
                        <Grid> 
                            <Grid.RowDefinitions>
                                <RowDefinition />
                                <RowDefinition Height=\"*\"/>
                            </Grid.RowDefinitions>
                            <Border  >
                                <StackPanel  Orientation=\"Vertical\">
                                    <Label Content=\"Something\"  />
                                </StackPanel>
                            </Border>
                            <ItemsControl  Grid.Row=\"1\" ItemsSource=\"{Binding Path=OtherItems}\"/>
                        </Grid>
                    </Ribbon:RibbonApplicationMenu.AuxiliaryPaneContent>
                </Ribbon:RibbonApplicationMenu>
            </Ribbon:Ribbon.ApplicationMenu>
        </Ribbon:Ribbon>
 public List<string> MainItem
            {
            get
                {
                    return new List<string>() { \"Item1\", \"Item2\", \"Item3\"};
                }
            }

        public List<string> OtherItems
        {
            get
            {
                return new List<string>() { \"val1\", \"val2\", \"val3\", \"val4\", \"val5\", \"val6\", \"val7\", \"val8\" };
            }
        }
如果列表中有项目,我该怎么做才能扩展\“ Something \”下的菜单?     
已邀请:
尝试将以下属性添加到Grid元素:  ScrollViewer.VerticalScrollBarVisibility = \“自动\”
                <Ribbon:RibbonApplicationMenu.AuxiliaryPaneContent> 
                    <Grid ScrollViewer.VerticalScrollBarVisibility=\"Auto\">  
                        <Grid.RowDefinitions> 
                            <RowDefinition /> 
                            <RowDefinition Height=\"*\"/> 
                        </Grid.RowDefinitions> 
                        <Border  > 
                            <StackPanel  Orientation=\"Vertical\"> 
                                <Label Content=\"Something\"  /> 
                            </StackPanel> 
                        </Border> 
                        <ItemsControl  Grid.Row=\"1\" ItemsSource=\"{Binding Path=OtherItems}\"/> 
                    </Grid> 
                </Ribbon:RibbonApplicationMenu.AuxiliaryPaneContent> 
    

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