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c# - 找不到引用 RibbonComboBox 的绑定(bind)源

转载 作者:太空宇宙 更新时间:2023-11-03 12:41:32 26 4
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我正在尝试学习 WPF,似乎遇到了一个我真的不完全理解的错误。

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.Ribbon.RibbonWindow', AncestorLevel='1''. BindingExpression:Path=WindowState; DataItem=null; target element is 'Ribbon' (Name=''); target property is 'NoTarget' (type 'Object')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.Ribbon.RibbonWindow', AncestorLevel='1''. BindingExpression:Path=IsActive; DataItem=null; target element is 'Ribbon' (Name=''); target property is 'NoTarget' (type 'Object')

这是我的 XAML 的一部分。我不知道错误是否刚刚开始,但我一直在调整适用于这两个 RibbonComboBoxe 的代码es 在 Home 标题下。 (<Ribbon> 元素在 <Grid> 元素中。)

谁能帮我解决这个问题?代码的行为不太正确,我无法判断此错误是否相关。

<Ribbon>
<Ribbon.ApplicationMenu>
<RibbonApplicationMenu>
<RibbonApplicationMenuItem Header="_Preview" ImageSource="Images/preview.png"></RibbonApplicationMenuItem>
<RibbonSeparator></RibbonSeparator>
<RibbonApplicationMenuItem Name="Save" KeyTip="S" Header="_Save" ImageSource="Images/save.png" ToolTipTitle="Save" ToolTipDescription="Save the current article and keep editing" Click="Save_Click"></RibbonApplicationMenuItem>
<RibbonSeparator></RibbonSeparator>
<RibbonApplicationMenuItem Name="SaveAndExit" KeyTip="X" Header="Save and E_xit" ToolTipTitle="Save and Exit" ToolTipDescription="Save the current article and close window" Click="SaveAndExit_Click"></RibbonApplicationMenuItem>
<RibbonApplicationMenuItem Name="AbortAndExit" Header="_Abort Edit" ToolTipTitle="Abort Edit" ToolTipDescription="Close window without saving changes to this article" Click="AbortAndExit_Click"></RibbonApplicationMenuItem>
</RibbonApplicationMenu>
</Ribbon.ApplicationMenu>
<RibbonTab Header="Home">
<RibbonGroup Header="Category">
<RibbonComboBox Label="Category:" SelectionBoxWidth="250">
<RibbonGallery SelectedItem="{Binding Path=Categories.SelectedItem}">
<RibbonGalleryCategory IsSharedColumnSizeScope="True" DisplayMemberPath="Text" ItemsSource="{Binding Path=Categories.Items}">
</RibbonGalleryCategory>
</RibbonGallery>
</RibbonComboBox>
<RibbonComboBox Label="Subcategory:" SelectionBoxWidth="250">
<RibbonGallery SelectedItem="{Binding Path=Subcategories.SelectedItem}">
<RibbonGalleryCategory IsSharedColumnSizeScope="True" ColumnsStretchToFill="True" MaxColumnCount="1" DisplayMemberPath="Text" ItemsSource="{Binding Path=Subcategories.Items}">
</RibbonGalleryCategory>
</RibbonGallery>
</RibbonComboBox>
<RibbonButton Label="Edit Categories" Command="local:EditCommands.Categories" SmallImageSource="Images\categories_sm.png" ToolTipTitle="Edit Categories" ToolTipDescription="Add, edit or delete categories and subcategories" ToolTipImageSource="Images\categories_sm.png"></RibbonButton>
</RibbonGroup>
<RibbonGroup Header="Author">
<RibbonTwoLineText Text="jwood@softcircuits.com"></RibbonTwoLineText>
<RibbonButton Label="Set Author" Command="local:EditCommands.Header1" SmallImageSource="Images\h1_sm.png" ToolTipTitle="Header 1" ToolTipDescription="Format selected text as a level 1 header" ToolTipImageSource="Images\h1.png"></RibbonButton>
</RibbonGroup>
<RibbonGroup Header="Settings">
<RibbonCheckBox Name="chkApproved" Label="Approved"></RibbonCheckBox>
<RibbonCheckBox Name="chkDeprecated" Label="Deprecated"></RibbonCheckBox>
<RibbonButton Name="btnMetadata" Label="Metadata" SmallImageSource="Images\metadata_sm.png" ToolTipTitle="Metadata" ToolTipDescription="Edit article metadata" ToolTipImageSource="Images\metadata.png" Click="btnMetadata_Click"></RibbonButton>
</RibbonGroup>
<RibbonGroup Header="History">
<RibbonButton Label="Edit Updates" Command="local:EditCommands.EditHistory" SmallImageSource="Images\history_sm.png" LargeImageSource="Images\history.png" ToolTipTitle="Edit Updates" ToolTipDescription="Edit update history for this article"></RibbonButton>
</RibbonGroup>
</RibbonTab>

更新:

根据 IlVic 的回答,我更改了我的 WindowRibbonWindow .但随后出现以下错误。

System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=HorizontalContentAlignment; DataItem=null; target element is 'RibbonGalleryItem' (Name=''); target property is 'HorizontalContentAlignment' (type 'HorizontalAlignment')

最佳答案

您的问题是由您的 Ribbon 控件引起的。如果你看一下它的默认样式(你可以使用 ILSpy ),你会发现这个 MultiDataTrigger :

<rd:MultiDataTrigger>
<rd:MultiDataTrigger.Conditions>
<rd:Condition Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ribbon:RibbonWindow}, Path=IsActive}" Value="False" />
<rd:Condition Binding="{Binding Path=(SystemParameters.IsGlassEnabled)}" Value="False" />
<rd:Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsHostedInRibbonWindow}" Value="True" />
</rd:MultiDataTrigger.Conditions>
<rd:Setter TargetName="PART_TitleHost" Value="{windows:DynamicResource {x:Static SystemColors.InactiveCaptionTextBrushKey}}" Property="TextElement.Foreground" />
</rd:MultiDataTrigger>

如您所见,它的第一个条件是寻找类型为 RibbonWindow 的祖先。 .您会很容易找到另一个 MultiDataTrigger,它也是一个条件,用于查找 RibbonWindow 控件的 WindowState 属性。

我猜你的 XAML 是放在普通窗口中的。因此,您需要将 Window 对象替换为 RibbonWindow 对象,例如:

<rib:RibbonWindow
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:rib="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
x:Class="[yourWindowClassName]">
<!-- Put your Ribbon Control somewhere here -->
</rib:RibbonWindow>

希望对你有帮助。

关于c# - 找不到引用 RibbonComboBox 的绑定(bind)源,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38842134/

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