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POHow to remove all views in region in CompositeWPF/Silverlight
 

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  1. POHow to remove all views in region in CompositeWPF/Silverlight
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    <p>I want remove all views from my region in Composite. I'm using Silverlight 4.0.</p> <p>And unfortunately, this code crashes with OutOfRangeException inside Composite.</p> <pre><code> List&lt;object&gt; views = new List&lt;object&gt;(_regionManager.Regions["NavigationRegion"].Views); foreach (object view in views) { _regionManager.Regions["NavigationRegion"].Remove(view); } </code></pre> <p>This is my callstack:</p> <blockquote> <p>[External Code]<br> Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 102 + 0x24 bytes C#<br> Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.RemoveAndNotify(System.Collections.IList items = Count = 1) Line 45 + 0x2b bytes C#<br> Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.UnderlyingCollection_CollectionChanged(object sender = Count = 0, System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 153 + 0xb bytes C# [External Code]<br> Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.Region.Remove(object view = {Kite.MyApp.SlUI.NavigationRegion.NavigationRegionView}) Line 230 + 0x1b bytes C#<br> MyApp.SlUI!Kite.MyApp.SlUI.Components.ViewController.linksRegion_LanguageChanged(object sender = {Kite.MyApp.SlUI.Controls.LinksUserControl}, Kite.MyApp.SlUI.Common.EventArgs e = {Kite.MyApp.SlUI.Common.EventArgs}) Line 77 + 0x2d bytes C#<br> MyApp.SlUI!Kite.MyApp.SlUI.Controls.LinksUserControl.OnLanguageChanged(string newLanguage = "en-GB") Line 37 + 0x32 bytes C#<br> MyApp.SlUI!Kite.MyApp.SlUI.Controls.LinksUserControl.ComboBox_SelectionChanged(object sender = {System.Windows.Controls.ComboBox}, System.Windows.Controls.SelectionChangedEventArgs e = {System.Windows.Controls.SelectionChangedEventArgs}) Line 31 + 0xb bytes C# [External Code]</p> </blockquote> <p>What did I wrong?</p> <p>P.S. In my region I have 3 views. So, composite crashes on removing the third.</p> <p>Hoping for you help :). Thank you.</p> <p>UPD: I downloaded debug symbols and found that problem is only in Accordion control as region. This is full call stack:</p> <pre><code>mscorlib.dll!System.ThrowHelper.ThrowArgumentOutOfRangeException(System.ExceptionArgument argument, System.ExceptionResource resource) + 0x41 bytes mscorlib.dll!System.ThrowHelper.ThrowArgumentOutOfRangeException() + 0x10 bytes mscorlib.dll!System.Collections.Generic.List&lt;object&gt;.this[int].get(int index = 0) + 0x13 bytes System.Windows.dll!System.Windows.Controls.ItemCollection.GetItemImpl(int index) + 0x15 bytes System.Windows.dll!System.Windows.Controls.ItemCollection.GetItemImplSkipMethodPack(int index) + 0xb bytes System.Windows.dll!System.Windows.PresentationFrameworkCollection&lt;System.__Canon&gt;.this[int].get(int index) + 0xb bytes System.Windows.Controls.Layout.Toolkit!System.Windows.Controls.Accordion.UnselectItem(int index = 0, object item = null) + 0x1aa bytes System.Windows.Controls.Layout.Toolkit!System.Windows.Controls.Accordion.ChangeSelectedIndex(int oldIndex = 0, int newIndex = -1) + 0x14c bytes System.Windows.Controls.Layout.Toolkit!System.Windows.Controls.Accordion.OnSelectedIndexPropertyChanged(System.Windows.DependencyObject d = {System.Windows.Controls.Accordion}, System.Windows.DependencyPropertyChangedEventArgs e = {System.Windows.DependencyPropertyChangedEventArgs}) + 0x1d9 bytes System.Windows.dll!System.Windows.DependencyObject.RaisePropertyChangeNotifications(System.Windows.DependencyProperty dp = {System.Windows.CustomDependencyProperty}, object oldValue, object newValue) + 0x51 bytes System.Windows.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.DependencyProperty property, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, System.Windows.DependencyObject.ValueOperation operation) + 0xf5 bytes System.Windows.dll!System.Windows.DependencyObject.SetValueInternal(System.Windows.DependencyProperty dp, object value, bool allowReadOnlySet) + 0x2ad bytes System.Windows.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty dp, object value) + 0xb bytes System.Windows.Controls.Layout.Toolkit!System.Windows.Controls.Accordion.SelectedIndex.set(int value = -1) + 0x4d bytes System.Windows.Controls.Layout.Toolkit!System.Windows.Controls.Accordion.OnItemsChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) + 0x737 bytes System.Windows.dll!System.Windows.Controls.ItemsControl.OnItemCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x52 bytes System.Windows.dll!System.Windows.Controls.ItemCollection.NotifyCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x37 bytes System.Windows.dll!System.Windows.Controls.ItemCollection.NotifyItemsCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x1f bytes System.Windows.dll!System.Windows.Controls.ItemCollection.EnumerableCollectionView.System.Windows.Controls.ICollectionChangedListener.OnCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x4f bytes System.Windows.dll!System.Windows.Controls.WeakCollectionChangedListener.SourceCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x3d bytes Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 102 + 0x24 bytes C# Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.RemoveAndNotify(System.Collections.IList items = Count = 1) Line 45 + 0x2b bytes C# Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.ViewsCollection.UnderlyingCollection_CollectionChanged(object sender = Count = 0, System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 153 + 0xb bytes C# System.Windows.dll!System.Collections.ObjectModel.ObservableCollection&lt;Microsoft.Practices.Composite.Presentation.Regions.ItemMetadata&gt;.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e) + 0x37 bytes System.Windows.dll!System.Collections.ObjectModel.ObservableCollection&lt;System.__Canon&gt;.RemoveItem(int index) + 0xa1 bytes mscorlib.dll!System.Collections.ObjectModel.Collection&lt;Microsoft.Practices.Composite.Presentation.Regions.ItemMetadata&gt;.Remove(Microsoft.Practices.Composite.Presentation.Regions.ItemMetadata item) + 0x75 bytes Microsoft.Practices.Composite.Presentation!Microsoft.Practices.Composite.Presentation.Regions.Region.Remove(object view = {Kite.MyApp.SlUI.NavigationRegion.NavigationRegionView}) Line 230 + 0x1b bytes C# </code></pre>
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