WPF与vici冷库CSList的数据绑定会导致转换错误

Question

当我尝试使用CSList作为WPF DataGrid的ItemsSource时，会得到一个错误。

无法将“System.Object[]”类型的对象强制转换为“Product[]”类型

我不完全确定是否可以使用它作为绑定源，但是根据几乎不存在的用于vici冷库的文档，它们的集合应该适合绑定。下面是它似乎失败的那条线：

dataGrid1.ItemsSource = Product.List();

有人能告诉我这是否可能，如果可能的话，我做错了什么？

谢谢!

编辑这里是堆栈跟踪(稍微修改一下)

  at Vici.CoolStorage.CSList`1.System.Collections.ICollection.CopyTo(Array array, Int32 index) in {...}\Vici.CoolStorage\Library\CSListGeneric.cs:line 1070
   at System.Collections.ArrayList.InsertRange(Int32 index, ICollection c)
   at System.Collections.ArrayList.AddRange(ICollection c)
   at System.Collections.ArrayList..ctor(ICollection c)
   at System.Windows.Data.BindingListCollectionView.RebuildListsCore()
   at System.Windows.Data.BindingListCollectionView.RebuildLists()
   at System.Windows.Data.BindingListCollectionView.<SubscribeToChanges>b__1f()
   at MS.Internal.Data.SynchronizationInfo.AccessCollection(IEnumerable collection, Action accessMethod, Boolean writeAccess)
   at System.Windows.Data.BindingOperations.AccessCollection(IEnumerable collection, Action accessMethod, Boolean writeAccess)
   at System.Windows.Data.BindingListCollectionView.SubscribeToChanges()
   at System.Windows.Data.BindingListCollectionView..ctor(IBindingList list)
   at MS.Internal.Data.ViewManager.GetViewRecord(Object collection, CollectionViewSource cvs, Type collectionViewType, Boolean createView, Func`2 GetSourceItem)
   at MS.Internal.Data.DataBindEngine.GetViewRecord(Object collection, CollectionViewSource key, Type collectionViewType, Boolean createView, Func`2 GetSourceItem)
   at System.Windows.Data.CollectionViewSource.GetDefaultCollectionView(Object source, Boolean createView, Func`2 GetSourceItem)
   at System.Windows.Data.CollectionViewSource.GetDefaultCollectionView(Object source, DependencyObject d, Func`2 GetSourceItem)
   at System.Windows.Controls.ItemCollection.SetItemsSource(IEnumerable value, Func`2 GetSourceItem)
   at System.Windows.Controls.ItemsControl.OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at System.Windows.Controls.ItemsControl.set_ItemsSource(IEnumerable value)
   at {...}.ViewProduct..ctor() in {...}\ViewProduct.xaml.cs:line 37
   at {...}.MainWindow..ctor() in {...}\MainWindow.xaml.cs:line 26

Answer 1

虽然这不是问题的解决办法，但它是一个解决办法。根据一篇文章，这里：

应该接受ICollection.CopyTo数组但不接受的Object[]方法，因为它们希望调用强类型的CopyTo方法。

论坛中的OP通过绑定到他的类型化集合的显式创建数组副本来解决这个问题。

而不是

TestCollection c = new TestCollection();
c.Add(new Test());
comboBox1.DataSource = c;
comboBox1.DisplayMember = "Text";

他用

TestCollection c = new TestCollection();
c.Add(new Test());
Test[] arr = new Test[c.Count];
c.CopyTo(arr);
comboBox1.DataSource = arr;
comboBox1.DisplayMember = "Text";

我很想找到一个不需要乱七八糟的变通办法的解决方案，但与此同时，这至少让我克服了这个问题(不过，这有点破坏了ORM的一些功能.)