1. 程式人生 > >列表ListBox、ListView、GridView 排序

列表ListBox、ListView、GridView 排序

ltview sort default descend table course key lis script

列表排序

1.使用控件默認排序方式(推薦)

    ListControl.Items.SortDescriptions.Clear();
    ListControl.Items.SortDescriptions.Add(new SortDescription("IsGroup", ListSortDirection.Descending));
    ListControl.Items.SortDescriptions.Add(new SortDescription(_sortingField?? "UpdateTime", _sortingDirection));
    ListControl.Items.Refresh();

2.使用CollectionView排序

var collectionView = CollectionViewSource.GetDefaultView(ListControl.ItemsSource);
if (collectionView != null)
{
    collectionView.SortDescriptions.Clear();
    collectionView.SortDescriptions.Add(new SortDescription("IsGroup", ListSortDirection.Descending));
    collectionView.SortDescriptions.Add(
new SortDescription(_sortingField, sortingDirection)); collectionView.Refresh(); }

2.自定義SortableObservableCollection

 public class SortableObservableCollection<T> : ObservableCollection<T>
    {
        public SortableObservableCollection()
        {
        }

        public SortableObservableCollection(List<T> list)
            : 
base(list) { } public SortableObservableCollection(IEnumerable<T> collection) : base(collection) { } public void Sort<TKey>(Func<T, TKey> keySelector, System.ComponentModel.ListSortDirection direction) { switch (direction) { case System.ComponentModel.ListSortDirection.Ascending: { ApplySort(Items.OrderBy(keySelector)); break; } case System.ComponentModel.ListSortDirection.Descending: { ApplySort(Items.OrderByDescending(keySelector)); break; } } } public void Sort<TKey>(Func<T, TKey> keySelector, IComparer<TKey> comparer) { ApplySort(Items.OrderBy(keySelector, comparer)); } private void ApplySort(IEnumerable<T> sortedItems) { var sortedItemsList = sortedItems.ToList(); foreach (var item in sortedItemsList) { Move(IndexOf(item), sortedItemsList.IndexOf(item)); } } }

添加列表屬性,並綁定到控件

        public SortableObservableCollection<CoursewareListItem> Items
        {
            get { return _items; }
            set
            {
                _items = value;
                RaisePropertyChanged("Items");
            }
        }

在排序觸發時,添加

viewModel.Items.Sort(item => item.UpdateTime, sortingDirection);

列表ListBox、ListView、GridView 排序