包装的ObservableCollection T当绑定到WPF DataGrid时，不允许对此视图抛出`EditItem' [英] Wrapped ObservableCollection<T> throwing `'EditItem' is not allowed for this view` when bound to a WPF DataGrid

问题描述

我创建了一个包装器来扩展ObservableCollection<T>

I created a wrapper to extend an ObservableCollection<T>

[Serializable]
public abstract class ModelCollection<TModel> : ModelCollectionBase,
    IList<TModel>, INotifyCollectionChanged, INotifyPropertyChanged
    where TModel : ModelBase<TModel>
{
    private ObservableCollection<TModel> wrappedCollection = new ObservableCollection<TModel>();

    // wrapper implementation goes here
}

在我尝试将列表中的项目绑定到DataGrid之前，我一直认为它工作正常.

I thought it was working fine until I attempted to bind items from a list to a DataGrid.

<DataGrid ItemsSource="{Binding /Orders}" AutoGenerateColumns="False">
    <DataGrid.Columns>
    <DataGridTextColumn Header="Order Id" Binding="{Binding OrderId}" />
        <DataGridTextColumn Header="Date Time" Width="125" Binding="{Binding DateTime}" />
        <DataGridTextColumn Header="Notes" Width="125" Binding="{Binding Notes}" />
        <DataGridTextColumn Header="Cost" Width="75" Binding="{Binding Cost}" />
    </DataGrid.Columns>
</DataGrid>

项目显示在网格中，但是双击一个单元格会抛出'EditItem' is not allowed for this view.

The items appear in the grid, but double clicking a cell throws 'EditItem' is not allowed for this view.

当我用常规的ObservableCollection<T>替换我的ModelCollection<TModel>时，不会引发异常.

The exception isn't thrown when I replace my ModelCollection<TModel> with a regular ObservableCollection<T>.

我的意图是允许对单元格进行编辑.我是否在包装器上缺少接口?

My intent is to allow editing on the cells. Am I missing an interface on my wrapper?

推荐答案

我能够通过显式实现IList

[Serializable]
public abstract class ModelCollection<TModel> : ModelCollectionBase,
    IList<TModel>, IList, INotifyCollectionChanged, INotifyPropertyChanged
    where TModel : ModelBase<TModel>
{
    private ObservableCollection<TModel> wrappedCollection = new ObservableCollection<TModel>();

    // wrapper implementation goes here
}

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