绑定到ItemsSource属性上ItemsControl中的动态资源 [英] binding to dynamic resource in ItemsControl on the ItemsSource Property

问题描述

嘿，我希望有人能为我回答几个问题.我应该如何确保绑定到itemsource的数据动态更新?我无法将绑定源从staticresource更改为动态资源，因为Object Binding的Source属性不是依赖项对象的依赖项属性.

Hey I was hoping someone could answer a couple questions for me. How am I supposed to ensure that the bound data to itemsource updates dynamically? I can't change bindingsource from staticresource to dynamic resource because the Source Property of the Object Binding is not a dependency property of a dependency object.

绑定到静态资源到底意味着什么?我认为绑定到动态资源将意味着当资源更改时依赖项属性也会更新.

What does binding to a staticresource mean exactly? I would think that binding to a dynamicresource would mean that the dependencyproperty updates when the resource changes.

绑定到静态资源是否仅附加资源的初始值?

Does binding to a static resource merely attach the resource's initial value?

我的目标只是基于signal_data更新signal_viewer.

My goal is just to have signal_viewer update based on the signal_data.

<UserControl.Resources>
    <wpfExp:SignalData x:Key="signal_data" />
</UserControl.Resources>

<DockPanel x:Name ="maindockpanel"  Height ="Auto" Width ="Auto" LastChildFill="True">
  <ToolBarTray DockPanel.Dock="Top">
    <ToolBar HorizontalAlignment="Stretch" VerticalAlignment="Top">
      <Button Name="load_button" Height="20" Width="Auto" Click="Load_Button_Click">Load</Button>
      <Button Name="zoom_in_button" Click="zoom_in_button_Click">Zoom In</Button>
      <Button Name="zoom_out_button" Click="zoom_out_button_Click">Zoom Out</Button>
    </ToolBar>
  </ToolBarTray>

  <ItemsControl x:Name ="Signalviewer_Control" ItemsSource="{Binding Source = {StaticResource signal_data}, Path = list_of_signals}">
    <ItemsControl.ItemTemplate>
      <DataTemplate>
        <wpfExp:SignalViewer Signal="{Binding}" MainText="{Binding Path = SignalName}"/>
      </DataTemplate>
    </ItemsControl.ItemTemplate>
  </ItemsControl>

推荐答案

由于您提到的所有这些问题，我都反对将ViewModel或数据作为Resource放在XAML中.

I'm all against putting the ViewModel or data as a Resource in XAML due to all these issues you mentioned.

相反，可以在后面的代码中分配DataContext:

Instead, either assign the DataContext in code behind:

public SomeWindow() //Window Constructor
{
    DataContext = new SomeViewModel();
}

或使用 ViewModelLocator

或使用无论如何，如果要快速解决此问题，请将list_of_signals从List<T>更改为ObservableCollection<T>

Anyways, if you want to resolve this quickly, change your list_of_signals from List<T> to an ObservableCollection<T>

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