持续从DataGrid排序到ItemsSource集合 [英] Persist sorting from DataGrid to ItemsSource collection

问题描述

我有一个 DataGrid ，我正在尝试做最直接的排序方法：点击每一列的标题。

I have a DataGrid and I'm trying to do the Sort thing the most straightforward way: by clicking on the header of each column.

这对于视图（在MVVM上下文 ）中非常有用，但是我想对底层的ViewModel集合进行排序（ ObservableCollection ）也。关于如何实现源集合的任何建议？

This is working great on the View (in the MVVM context), but I want to sort the underlying ViewModel collection (ObservableCollection) too. Any suggestions on how to implement the source collection?

推荐答案

将网格绑定到一个 ListCollectionView ，初始化为 ObservableCollection 。网格将使用您预先创建的 ICollectionView ，而不是根据您的创建自己的 ICollectionView ObservableCollection< T> （这是默认行为），并对您的实例应用任何排序功能/谓词。

Bind the grid to a ListCollectionView, initialised with the ObservableCollection. The grid will use your pre-created ICollectionView instead of creating it's own ICollectionView based on your ObservableCollection<T> (which is the default behaviour), and apply any sorting functionality/predicates to your instance.

作为一个额外的好处，当您从ViewModel调用MyListCollectionView.Refresh（）时，排序/过滤 ListCollectionView 将反映在您的网格中。

As an added benefit, sorting/filtering that ListCollectionView will be reflected in your grid whenever you call MyListCollectionView.Refresh() from your ViewModel.

完成此操作后，迭代ListCollectionView的Items集合将准确反映网格的当前过滤器/排序状态。

Once you've done this, iterating through the Items collection of your ListCollectionView will accurately reflect the current filter/sort state of your grid.

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