将功能区组合框绑定到可观察集合

发布于 2024-12-14 05:50:20 字数 1757 浏览 4 评论 0原文

我有一个功能区组合框：

<r:RibbonComboBox DataContext="this"
                  SelectionBoxWidth="62"
                  VerticalAlignment="Center" 
                  IsEditable="True"  
                  Label="Saved Queries" 
                  Name="Saved_Queries"  
                  ToolTip="Select an item to run or edit" >
<r:RibbonGallery 
                  MaxColumnCount="1" 
                  Name="RibbonQu" 
                  ScrollViewer.VerticalScrollBarVisibility="Auto"
                  SelectionChanged="RibbonGallery_SelectionChanged" >
     <r:RibbonGalleryCategory ItemsSource="{Binding SavedXml}" >
            <r:RibbonGalleryItem Content="Green" Foreground="Green" />
            <r:RibbonGalleryItem Content="Blue" Foreground="Blue" />
            <r:RibbonGalleryItem Content="Orange" Foreground="Orange" />
     </r:RibbonGalleryCategory>
 </r:RibbonGallery>

我需要将 comobobox 的项目绑定到可观察的集合，如下所示：

private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        XmlDocument doc = new XmlDocument();
        doc.Load("QueryList.xml");

        XmlNodeList List = doc.SelectNodes("//Query");

        foreach (XmlElement element in List)
        {

            if (element == null) return;
            if (element != null)
            {
                //Saved_Queries.Items.Add(element.InnerText);

                _savedxml.Add(element.InnerText.ToString());  
            }
        }
    }
    public ObservableCollection<string> SavedXml
    {
        get { return _savedxml; }
    set{}
    }

但是当我运行它时，我在 comobox 中看不到任何内容。我认为问题出在数据上下文上，它已在代码中设置为其他内容，因此在组合框中我使用：数据上下文=“这个” 但我仍然无法取得任何成就。我该怎么办？谢谢！

原文

I have a ribbon combob box as:

<r:RibbonComboBox DataContext="this"
                  SelectionBoxWidth="62"
                  VerticalAlignment="Center" 
                  IsEditable="True"  
                  Label="Saved Queries" 
                  Name="Saved_Queries"  
                  ToolTip="Select an item to run or edit" >
<r:RibbonGallery 
                  MaxColumnCount="1" 
                  Name="RibbonQu" 
                  ScrollViewer.VerticalScrollBarVisibility="Auto"
                  SelectionChanged="RibbonGallery_SelectionChanged" >
     <r:RibbonGalleryCategory ItemsSource="{Binding SavedXml}" >
            <r:RibbonGalleryItem Content="Green" Foreground="Green" />
            <r:RibbonGalleryItem Content="Blue" Foreground="Blue" />
            <r:RibbonGalleryItem Content="Orange" Foreground="Orange" />
     </r:RibbonGalleryCategory>
 </r:RibbonGallery>

I need to bind the items of the comobobox to an observable collection as follows:

private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        XmlDocument doc = new XmlDocument();
        doc.Load("QueryList.xml");

        XmlNodeList List = doc.SelectNodes("//Query");

        foreach (XmlElement element in List)
        {

            if (element == null) return;
            if (element != null)
            {
                //Saved_Queries.Items.Add(element.InnerText);

                _savedxml.Add(element.InnerText.ToString());  
            }
        }
    }
    public ObservableCollection<string> SavedXml
    {
        get { return _savedxml; }
    set{}
    }

But i do not see anything in the comobox when i run it.I think the problem is with the data context, which has been set to others in the code, hence in the combobox i use :
DataContext="this"
but im still not able to achieve anything. how can i go about this? thanks!

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眼眸里的那抹悲凉 2024-12-21 05:50:20

正如您所怀疑的，您错误地分配了 DataContext。

如果您需要组合仅在 SavedXml 中包含项目，而实际上不需要设置其 DataContext，请尝试删除 DataContext="this" 并添加 ItemsSource="{Binding SavedXml,relativeSource= {RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}"。

如果您需要设置 DataContext，请将分配更改为：DataContext="{BindingrelativeSource={RelativeSourceMode=FindAncestor, AncestorType={x:Type Window}}}"，然后是 ItemsSource="{Binding SavedXml}"。

在这两种情况下，由于 SavedXml 不是依赖项属性，并且它没有使用 INotifyProperty 更改的接口，因此您必须在 InitializeComponent() 之前填充项目。正在运行。事件更好：使 SavedXml 成为 DependencyProperty。