您正在设置图标属性设置为图片控制>风格。现在，只创建一个风格的副本，因此，创建图像只有一个副本。现在，任何控制可以在同一时间只能有一个父。所以，当它被分配给持续菜单项，它是从以前的菜单项控件中删除。为了解决这个问题，可以使用模板。

而不是标题$ C $的设置C>属性设置 HeaderTemplate中：

 < setter属性= HeaderTemplate中> 
< Setter.Value> 
<&DataTemplate的GT; 
<网格和GT; 
< Grid.ColumnDefinitions> 
< ColumnDefinition WIDTH =自动/> 
< ColumnDefinition WIDTH =*/> 
< /Grid.ColumnDefinitions> 
<图像Grid.Column =0
来源={绑定路径= IconPath}/&GT; 
&LT; TextBlock的Grid.Column =1
文本={结合显示名称}/&GT; 
&LT; /网格和GT; 
&LT; / DataTemplate中&GT; 
&LT; /Setter.Value> 
&LT; /二传手&GT; 
 

我不知道是什么属性由您正在使用的控件工具包暴露出来。但是，我敢肯定，他们必须有一个模板属性。

这样做后，就不需要设置图标的样式属性。

Im getting menuItem icon appearing only on last menuItem. If i snoop the app only last menuItem has image in icon, while if i debug all MenuItems appear to have image in icon. Also if i add submenuItem the icon on menuItem dissapears once i open submenus and the last submenu gets the icon... Any idea? PS: also tooltips on menu item dont work. Im using caliburn micro and fluent ribbon controls.

        <ControlTemplate x:Key="dropDownButton">
        <ef:DropDownButton Header="{Binding DisplayName}" 
                           ItemsSource="{Binding Items}" 
                           LargeIcon="{Binding LargeIconPath}" 
                           cm:Message.Attach="ClickAction()" 
                           ef:KeyTip.Keys="{Binding KeyTip}">
            <ef:DropDownButton.ItemContainerStyle>
                <Style TargetType="MenuItem">
                    <Setter Property="Header" 
                            Value="{Binding DisplayName}"/>
                    <Setter Property="Icon">
                        <Setter.Value>
                            <Image Source="{Binding Path=IconPath}"/>
                        </Setter.Value>
                    </Setter>
                    <Setter Property="ItemsSource" 
                            Value="{Binding Items}"/>
                    <Setter Property="cm:Message.Attach" 
                            Value="ClickAction()"/>
                    <Setter Property="ef:KeyTip.Keys" 
                            Value="{Binding KeyTip}"/>
                    <Setter Property="ToolTip">
                        <Setter.Value>
                            <ef:ScreenTip Title="{Binding DisplayName}"
                                          HelpTopic="ScreenTip help ..."
                                          Image="{Binding LargeIconPath}"
                                          Text="Text for ScreenTip"/>
                        </Setter.Value>
                    </Setter>
                </Style>
            </ef:DropDownButton.ItemContainerStyle>
            <ef:DropDownButton.ToolTip>
                <ef:ScreenTip Title="{Binding DisplayName}"
                              HelpTopic="ScreenTip help ..."
                              Image="{Binding LargeIconPath}"
                              Text="Text for ScreenTip"/>
            </ef:DropDownButton.ToolTip>
        </ef:DropDownButton>

You are setting Icon property to an Image control in Style. Now, only one copy of Style is created and thus, only one copy of Image is created. Now, any control can have only one parent at a time. So, when it is assigned to last MenuItem, it is removed from previous MenuItem controls. To fix this, use Templates.

Instead of setting Header property, set HeaderTemplate:

            <Setter Property="HeaderTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <Image Grid.Column="0"
                                   Source="{Binding Path=IconPath}" />
                            <TextBlock Grid.Column="1"
                                       Text="{Binding DisplayName}" />
                        </Grid>
                    </DataTemplate>
                </Setter.Value>
            </Setter>

I'm not sure of what properties are exposed by the control toolkit you are using. But, I'm sure they must have a template property.

After doing this, you don't need to set Icon property in style.