Question

实际上我没有遇到排序普通ListView.ItemsSource的问题，我的问题实际上来自于我将IGrouping List作为ItemSource或SelectedItems，我使用以下代码段：

    private void Sort(string sortBy, ListSortDirection direction)
    {
        lastDirection = direction;
        ICollectionView dataView = CollectionViewSource.GetDefaultView(this.ItemsSource);

        dataView.SortDescriptions.Clear();
        SortDescription sd = new SortDescription(sortBy, direction);
        dataView.SortDescriptions.Add(sd);
        dataView.Refresh();
    }

当sortBy =某个ListView列时，direction =升序，降序（取决于最后的排序）

那么如何设置如下的ItemSource：当T = myClass

时IList

提前致谢！

更新：

修改了以上代码段：

private void Sort(string sortBy, ListSortDirection direction)
{
    lastDirection = direction;
    ICollectionView dataView;
    if (this.Name.Equals("dlstPlantillas"))
    {
        List<Plantilla> newItemSource = new List<Plantilla>();
        var source = this.ItemsSource;

        foreach (var group in source)
        {
            System.Linq.IGrouping<string, Plantilla> groupCast = group as System.Linq.IGrouping<string, Plantilla>;
            if (null == groupCast) return;
            foreach (Plantilla item in groupCast)
            {
                newItemSource.Add(item);
            }
        }
         dataView = CollectionViewSource.GetDefaultView(newItemSource);
    }
    else
    {
        dataView = CollectionViewSource.GetDefaultView(this.ItemsSource);
    }          

    dataView.SortDescriptions.Clear();
    SortDescription sd = new SortDescription(sortBy, direction);
    dataView.SortDescriptions.Add(sd);
    dataView.Refresh();
}

实际上我得到了这个堆栈：

System.ObjectDisposedException was unhandled by user code 
   Message = "Unable to access the deleted object. \ R \ nNombre object: 'It has a DataContext accessed after Dispose..'" 
   Source = "System.Data.Linq" 
   ObjectName = "It has been a DataContext accessed after Dispose." 
   Stacktrace: 
        in System.Data.Linq.DataQuery `1.System.Collections.IEnumerable.GetEnumerator () 
        in SRIMedico.com.SortableListView.Sort (String Sort, ListSortDirection direction) in D: \ cs_InformeMedico \ app \ SortableListView.cs: line 219 
        in SRIMedico.com.SortableListView.GridViewColumnHeaderClickedHandler (Object sender, RoutedEventArgs e) in D: \ cs_InformeMedico \ app \ SortableListView.cs: line 163 
        in System.Windows.RoutedEventHandlerInfo.InvokeHandler (Object target, RoutedEventArgs routedEventArgs) 
        in System.Windows.EventRoute.InvokeHandlersImpl (Object source, RoutedEventArgs args, Boolean reRaised) 
        in System.Windows.UIElement.RaiseEventImpl (DependencyObject sender, RoutedEventArgs args) 
        in System.Windows.UIElement.RaiseEvent (RoutedEventArgs e) 
        in System.Windows.Controls.Primitives.ButtonBase.OnClick () 
        in System.Windows.Controls.GridViewColumnHeader.ClickImplement () 
        in System.Windows.Controls.GridViewColumnHeader.OnClick () 
        in System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp (MouseButtonEventArgs e) 
        in System.Windows.Controls.GridViewColumnHeader.OnMouseLeftButtonUp (MouseButtonEventArgs e) 
        in System.Windows.UIElement.OnMouseLeftButtonUpThunk (Object sender, MouseButtonEventArgs e) 
        in System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler (Delegate genericHandler, Object genericTarget) 
        in System.Windows.RoutedEventArgs.InvokeHandler (Delegate handler, Object target) 
        in System.Windows.RoutedEventHandlerInfo.InvokeHandler (Object target, RoutedEventArgs routedEventArgs) 
        in System.Windows.EventRoute.InvokeHandlersImpl (Object source, RoutedEventArgs args, Boolean reRaised) 
        in System.Windows.UIElement.ReRaiseEventAs (DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) 
        in System.Windows.UIElement.CrackMouseButtonEventAndReRaiseEvent (DependencyObject sender, MouseButtonEventArgs e) 
        in System.Windows.UIElement.OnMouseUpThunk (Object sender, MouseButtonEventArgs e) 
        in System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler (Delegate genericHandler, Object genericTarget) 
        in System.Windows.RoutedEventArgs.InvokeHandler (Delegate handler, Object target) 
        in System.Windows.RoutedEventHandlerInfo.InvokeHandler (Object target, RoutedEventArgs routedEventArgs) 
        in System.Windows.EventRoute.InvokeHandlersImpl (Object source, RoutedEventArgs args, Boolean reRaised) 
        in System.Windows.UIElement.RaiseEventImpl (DependencyObject sender, RoutedEventArgs args) 
        in System.Windows.UIElement.RaiseEvent (RoutedEventArgs args, Boolean trusted) 
        in System.Windows.Input.InputManager.ProcessStagingArea () 
        in System.Windows.Input.InputManager.ProcessInput (InputEventArgs input) 
        in System.Windows.Input.InputProviderSite.ReportInput (InputReport inputReport) 
        in System.Windows.Interop.HwndMouseInputProvider.ReportInput (IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 and Int32 wheel) 
        in System.Windows.Interop.HwndMouseInputProvider.FilterMessage (IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean & handled) 
        in System.Windows.Interop.HwndSource.InputFilterMessage (IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean & handled) 
        in MS.Win32.HwndWrapper.WndProc (IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean & handled) 
        in MS.Win32.HwndSubclass.DispatcherCallbackOperation (Object o) 
        in System.Windows.Threading.ExceptionWrapper.InternalRealCall (Delegate callback, Object args, Boolean isSingleParameter) 
        in System.Windows.Threading.ExceptionWrapper.TryCatchWhen (Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
        in System.Windows.Threading.Dispatcher.WrappedInvoke (Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) 
        in System.Windows.Threading.Dispatcher.InvokeImpl (DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) 
        in System.Windows.Threading.Dispatcher.Invoke (DispatcherPriority priority, Delegate method, Object arg) 
        in MS.Win32.HwndSubclass.SubclassWndProc (IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) 
        in MS.Win32.UnsafeNativeMethods.DispatchMessage (MSG & msg) 
        in System.Windows.Threading.Dispatcher.PushFrameImpl (DispatcherFrame frame) 
        in System.Windows.Threading.Dispatcher.PushFrame (DispatcherFrame frame) 
        in System.Windows.Window.ShowHelper (Object booleanBox) 
        in System.Windows.Window.Show () 
        in System.Windows.Window.ShowDialog () 
   InnerException:

太难了？：S

Answer 1

查看堆栈跟踪表明您正在使用LINQ-to-SQL查询作为列表框的数据源。您似乎然后处理了进行查询的DataContext。当您在DataView上执行Refresh（）时，它会尝试重新运行查询，但由于DataContext已被释放而失败。

我知道你需要做的是在将查询结果绑定到ItemsControl之前将其捕获到列表中。您可以使用ToList（）扩展方法来执行此操作。

使用System.Linq.IGrouping <string，class t =“”> </string，class>对WPF ListView进行排序

1 个答案: