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POListbox isn't showing my first item
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  1. POListbox isn't showing my first item
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    copied!<p>I'm having a small problem with WPF and binding my listbox/listview to a custom list.</p> <p>This list has the IEnumerator &amp; IEnumerable interfaces implemented. If I bind my control to those, I never get to see the first object of that list.</p> <p>When I a gridview, it does show my first object. So for some reason the listbox/listview are doing different things to enumerate my custom list.</p> <p>My binding is for both setup the exact same way, using a public property on my ViewModel.</p> <p>The Binding ( My PersonObject has a public property ProjectList, which gets the custom list i'm talking about ).</p> <pre><code> public Person Person { get { return this._person; } set { if (this._person != value) { this._person = value; RaisePropertyChanged("Person"); } } } </code></pre> <p>The XAML:</p> <pre><code>&lt;ListBox ItemsSource="{Binding Path=Person.ProjectList,UpdateSourceTrigger=PropertyChanged}" AlternationCount="2" ItemContainerStyle="{StaticResource CustomListBoxItemStyle}"&gt; &lt;ListBox.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel&gt; &lt;TextBlock&gt; &lt;TextBlock.Text&gt; &lt;MultiBinding StringFormat="{}{0} - {1}"&gt; &lt;Binding Path="Name" /&gt; &lt;Binding Path="Number" /&gt; &lt;/MultiBinding&gt; &lt;/TextBlock.Text&gt; &lt;/TextBlock&gt; &lt;TextBlock&gt; &lt;TextBlock.Text&gt; &lt;MultiBinding StringFormat="{}{0} - {1}"&gt; &lt;Binding Path="StartDate" /&gt; &lt;Binding Path="EndDate" /&gt; &lt;/MultiBinding&gt; &lt;/TextBlock.Text&gt; &lt;/TextBlock&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ListBox.ItemTemplate&gt; &lt;/ListBox&gt; </code></pre> <p>The Customlist class:</p> <pre><code>public class ProjectList : DeletableSupport, IEnumerator, IEnumerable { private IList&lt;Project&gt; _pList; private int _position; public ProjectList() { this._pList = new ActivatableList&lt;Project&gt;(); this._position = -1; } public void Add(Project p) { Activate(ActivationPurpose.Write); this._pList.Add(p); } public void Remove(Project p) { Activate(ActivationPurpose.Write); this._pList.Remove(p); } public int Count() { Activate(ActivationPurpose.Read); return this._pList.Count(); } public bool Contains(Project p) { Activate(ActivationPurpose.Read); return this._pList.Contains(p); } public Project this[int i] { get { Activate(ActivationPurpose.Read); return this._pList[i]; } set { Activate(ActivationPurpose.Write); this._pList[i] = value; } } public static ProjectList operator +(ProjectList pList, Project p) { pList.Add(p); return pList; } public static ProjectList operator -(ProjectList pList, Project p) { pList.Remove(p); return pList; } #region IEnumerable Members public IEnumerator GetEnumerator() { Activate(ActivationPurpose.Read); return (IEnumerator)this; } #endregion #region IEnumerator Members public object Current { get { try { Activate(ActivationPurpose.Read); return this._pList[_position]; } catch (IndexOutOfRangeException) { throw new InvalidOperationException(); } } } public bool MoveNext() { Activate(ActivationPurpose.Read); this._position++; if (_position &lt; this._pList.Count) { return true; } else { return false; } } public void Reset() { Activate(ActivationPurpose.Write); _position = -1; } #endregion } </code></pre> <p>The Activate is from db4o, the ActivatableList implements IList</p>
 

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