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POHow can I bind to an element within a list, within a observable collection?
 

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  1. POHow can I bind to an element within a list, within a observable collection?
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    <p>I have the following problem:</p> <p>I have an ObservableCollection as my model, which looks like this:</p> <pre><code>public class HistoryViewModel : ViewModelBase { private ObservableCollection&lt;List&lt;KeyValuePair&lt;DateTime, float&gt;&gt;&gt; _valuePairs; public ObservableCollection&lt;List&lt;KeyValuePair&lt;DateTime, float&gt;&gt;&gt; ValuePairs { get { return this._valuePairs; } set { this._valuePairs= (ObservableCollection&lt;List&lt;KeyValuePair&lt;DateTime, float&gt;&gt;&gt;)value; OnPropertyChanged("ValuePairs"); } } } </code></pre> <p>As you can see this collection consists of lists, i need to bind to the KeyValuePair in the list. But i don't know how. The problem is I cannot know how many items will be in the collection nor in the list.</p> <p>my attempt right now looks like this:</p> <pre><code>&lt;ItemsControl ItemsSource="{Binding Path=ValuePairs}"&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;StackPanel&gt;&lt;/StackPanel&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;charting:Chart Width="400" Height="250"&gt; &lt;charting:Chart.Series&gt; &lt;charting:LineSeries Title="Monthly Count" IndependentValueBinding="{Binding //, Path=Key}" DependentValueBinding="{Binding //, Path=Value}"&gt; &lt;/charting:LineSeries&gt; &lt;/charting:Chart.Series&gt; &lt;/charting:Chart&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; </code></pre> <p>It displays how much elements are in the collection, but the chart does not show any values. Any ideas?</p> <p>Thanks!</p>
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    1. PTQuestion
    1. USKevin DiTraglia
    1. USpeer
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    1. CORemember that Binding / only works, if you use the SynchronizedWithCurrentItem property. I don't know this Chart control, but if it is an ItemsControl there should be support for that.
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      1. POHow can I bind to an element within a list, within a observable collection?
      1. USdowhilefor
    2. COWell .. I don't know if it has or not, it a chart from the WPFToolkit library.
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      1. POHow can I bind to an element within a list, within a observable collection?
      1. USpeer
 

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