我如何获得NotifyCollectionChangedEventHandler以在WPF绑定中的SortedList的值上工作 [英] How can I get NotifyCollectionChangedEventHandler to work on the Values of a SortedList in WPF binding

问题描述

我有以下两个组合框.当SortedList更改时，一个更新内容，而另一个则不更改.

I''ve got the following two combo boxes. One updates the content when the SortedList changes and the other doesn''t.

<ComboBox Name="cbxNotUpdating"

  ItemsSource="{Binding Path=DataContext.Versions.Values, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}"

  SelectedValue="{Binding Path=Version, Mode=TwoWay}">
</ComboBox>

<ComboBox Name="cbxUpdating"

  ItemsSource="{Binding Path=DataContext.Versions, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}"

    SelectedValue="{Binding Path=Version, Mode=TwoWay}">
</ComboBox>

明显的区别是cbxNotUpdating绑定到值，而cbxUpdating绑定到SortedList本身.
我的列表实现如下所示:

The obvious difference is that cbxNotUpdating binds to the Values and cbxUpdating binds to the SortedList itself.
My List implementation looks like this:

public class VersionList : SortedList<string, Version>, INotifyCollectionChanged
{
...
  public event NotifyCollectionChangedEventHandler CollectionChanged;
  protected virtual void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
  {
      if (CollectionChanged != null)
      {
          CollectionChanged(this, e);
      }
  }
}

如何进行cbxNotUpdating更新?
我有一个要作为SelectedValue拥有的版本"属性，同时我有一个仅适用于集合的Value部分的模板.

我正在使用vs2010.

How can I make the cbxNotUpdating update?
I''ve got a property that is a ''Version'' that I want to have as the SelectedValue at the same time I have a template that works on just the Value part of the collection.

I''m using vs2010.

推荐答案

感谢SteveAdey指出了致命缺陷.
最后，我绑定到SortedList更改了SelectedValuePath，并使用了与Value绑定的DataTemplate来达到我的期望目标.
我的解决方案如下所示:

Thanks to SteveAdey for pointing out the fatal flaw.
In the end I bound to the SortedList changed the SelectedValuePath and used a DataTemplate binding to the Value to get to my desired goal.
My solution looks like this:

<ComboBox Name="cbxFolder" Grid.Column="1" Grid.Row="0"

                ItemsSource="{Binding Path=DataContext.Versions, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}"

                SelectedValue="{Binding Path=Version, Mode=TwoWay}"

                SelectedValuePath="Value"

                ComboBox.ItemTemplate="{StaticResource VersionCbxTemplate}">
</ComboBox>

在资源中有了这个DataTemplate

With this DataTemplate in the resources

<DataTemplate x:Key="saturnVersioncbx">
  <StackPanel Margin="5" DataContext="{Binding Value}" >...
  </StackPanel>
</DataTemplate>

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