WPF BindingListCollectionView为ListCollectionView DataTable作为ItemsSource [英] WPF BindingListCollectionView to ListCollectionView for DataTable as ItemsSource

问题描述

我想在ListView上进行自定义排序，它具有DataTable作为ItemsSource：

  myListView.ItemsSource =（数据为DataTable）; 
  

这是我的排序功能的第一行：

  DataView view =（myListView.ItemsSource as DataTable）.DefaultView; 
 
 ListCollectionView coll =（ListCollectionView）CollectionViewSource.GetDefaultView（view）; 
  

第二行抛出一个执行，如：

无法将System.Windows.Data.BindingListCollectionView转换为System.Windows.Data.ListCollectionView

有人有解决方案吗？ Thx 4答案

解决方案

它返回不是ListCollectionView的ICollectionView。您最有可能希望在视图的顶部获取ViewCollectionView具有的功能。而且由于ICollectionView实现了CollectionChanged，所以你不想使用BindingListCollectionView。

  DataView view =（myListView.ItemsSource as DataTable）。默认视图; 
 
 ListCollectionView coll = new ListCollectionView（CollectionViewSource.GetDefaultView（view））; 
  

虽然可以选择：

  DataView view =（myListView.ItemsSource as DataTable）.DefaultView; 
 
 BindingListCollectionView coll = new BindingListCollectionView（view）; 
  

如果您只想要一个视图。

如果您直接绑定到WPF控件，最好直接绑定到它而不进行BindingListCollectionView / ListCollectionView，因为DefaultView已经允许对DataTable进行排序。

  Binding binding = new Binding（）{Source =（myListView.ItemsSource as DataTable）}; 
 
 this.myListView.SetBinding（myListView.ItemsSourceProperty，binding）; 
 
 DataView view =（myListView.ItemsSource as DataTable）.DefaultView; 
 
 view.Sort =Age; 
  

希望有用，

TamusJRoyce

I want to do custom sorting on a ListView which has a DataTable as ItemsSource:

myListView.ItemsSource = (data as DataTable);

And this are the first lines of my sorting function:

DataView view = (myListView.ItemsSource as DataTable).DefaultView;

ListCollectionView coll = (ListCollectionView)CollectionViewSource.GetDefaultView(view);

The second line throws an execption like:

Unable to cast "System.Windows.Data.BindingListCollectionView" to "System.Windows.Data.ListCollectionView"

Has anyone a solution? Thx 4 answers

解决方案

It returns an ICollectionView that is not a ListCollectionView. You most likely want a view on top of a view to get the features that ListCollectionView has. And since ICollectionView implements CollectionChanged, you wouldn't want to use BindingListCollectionView.

DataView view = (myListView.ItemsSource as DataTable).DefaultView;

ListCollectionView coll = new ListCollectionView(CollectionViewSource.GetDefaultView(view));

Although an alternative would be:

DataView view = (myListView.ItemsSource as DataTable).DefaultView;

BindingListCollectionView coll = new BindingListCollectionView(view);

If you only wanted only one view.

If you are binding directly to a WPF control, it is best to bind directly to it without making a BindingListCollectionView/ListCollectionView, as DefaultView already allows sorting of the DataTable.

Binding binding = new Binding() { Source = (myListView.ItemsSource as DataTable) };

this.myListView.SetBinding(myListView.ItemsSourceProperty, binding);

DataView view = (myListView.ItemsSource as DataTable).DefaultView;

view.Sort = "Age";

Hopefully Helpful,

TamusJRoyce

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