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POWPF Accessing Items inside Listbox which has a UserControl as ItemTemplate
 

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  1. POWPF Accessing Items inside Listbox which has a UserControl as ItemTemplate
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    <ul> <li>I have Window that has a ListBox</li> <li>ListBox(MyListBox) has a DataTable for its DataContext</li> <li>ListBox's ItemSource is : {Binding}</li> <li>Listbox has a UserControl(MyUserControl) as DataTemplate</li> <li>UserControl has RadioButtons and TextBoxes (At first They're filled with values from DataTable and then user can change them)</li> <li>Window has one Submit Button</li> </ul> <p>What I want to do is, when user clicks the submit button </p> <ul> <li>For each ListBox Item, get the values form UserControl's TextBoxes and RadioButtons.</li> </ul> <p>I was using that method for this job :</p> <pre><code>foreach(var element in MyListBox.Items) { var border = MyListBox.ItemContainerGenerator.ContainerFromItem(element)as FrameworkElement; MyUserControl currentControl = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(myBorder,0) as Border,0)as ContentPresenter,0)as MyUserControl; //And use currentControl } </code></pre> <p>I realised nothing when using 3-5 items in Listbox. But when I used much more items, I saw that "var border" gets "null" after some elements looped in foreach function.</p> <p>I found the reason here : <a href="https://stackoverflow.com/questions/1675926/listview-itemcontainergenerator-containerfromitemitem-return-null-after-20-item">ListView.ItemContainerGenerator.ContainerFromItem(item) return null after 20 items</a></p> <p>So what can I do now? I want to access all items and get their values sitting on user controls.</p> <p>Thanks</p>
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