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POhow to access a ListBox inside a Pivot in windows phone 7?
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  1. POhow to access a ListBox inside a Pivot in windows phone 7?
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    copied!<p>i have a a Pivot that has a ListBox defined as its Pivot.ItemTemplate as the following.</p> <pre><code>&lt;controls:Pivot x:Name="pivot"&gt; &lt;controls:Pivot.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;ListBox x:Name="listBox"&gt; ... &lt;/ListBox&gt; &lt;/DataTemplate&gt; &lt;/controls:Pivot.ItemTemplate&gt; &lt;/controls:Pivot&gt; </code></pre> <p>how do i programmatically access the corresponding ListBox control corresponding to the Pivot.SelectedItem or Pivot.SelectedIndex?</p> <p>i tried something similar to this link <a href="http://www.windowsphonegeek.com/tips/how-to-access-a-control-placed-inside-listbox-itemtemplate-in-wp7" rel="nofollow">http://www.windowsphonegeek.com/tips/how-to-access-a-control-placed-inside-listbox-itemtemplate-in-wp7</a>. </p> <pre><code>var count = VisualTreeHelper.GetChildrenCount(pivotItem); for(int i=0; i &lt; count; i++) { var child = VisualTreeHelper.GetChild(pivotItem, i); if(child is ListBox) { //do something } else { Debug.WriteLine(child.GetType()); } } </code></pre> <p>for some reason, i get System.Windows.Controls.Grid on the Debug.WriteLine.</p> <p>the reason why i need to get a handle or access the ListBox inside the Pivot (that is currently on display/selected), is because i need to reset its view (scroll it back to the top). the ListBox is data bound to ObservableCollection, and when i update the collection, the scroll position needs to be placed back to the top; otherwise, everything works (data binding/visual display), except now the view is stuck in the middle or where the user currently is. if there's an easier way to do this without getting a handle on the ListBox, i'm open to that solution as well.</p> <p>just in case anyone is interested, i tinkered and came up with something that works specifically for my case. the code is below. basically, i had to get the PivotItem first.</p> <pre><code>PivotItem pivotItem = pivot.ItemContainerGenerator.ContainerFromItem(myObject) as PivotItem; </code></pre> <p>i then created a local variable to store the ListBox (if it's found) and recursed the tree view model.</p> <pre><code>ListBox listBox = null; Recurse(pivotItem, ref listBox); </code></pre> <p>and my Recurse function looks like the following.</p> <pre><code>private void Recurse(DependencyObject obj, ref ListBox listBox) { if(obj is ListBox) { listBox = obj as ListBox; return; } var count = VisualTreeHelper.GetChildrenCount(obj); for(int i=0; i &lt; count; i++) { var child = VisualTreeHelper.GetChild(obj, i); Recurse(child, ref listBox); } } </code></pre>
 

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