protected DataItemCollection(DataItemComparer comparer)
{
if (comparer == null)
{
throw new ArgumentNullException(nameof(comparer));
}
_comparer = comparer;
}
public int Compare(RepositoryFolderReader x, RepositoryFolderReader y)
{
int result = PrimaryComparer.Compare(x.CurrentItem.DateTime, y.CurrentItem.DateTime);
if (0 == result && null != DataItemComparer)
{
result = DataItemComparer.Compare(x.CurrentItem, y.CurrentItem);
}
return(result);
}
public void LocalDataSourceProvider_SortDescriptions_NoGrouping_Ascending()
{
var data = Enumerable.Range(0, 10000).Select((i) => new DataItem {
ID = i, Name = "Name" + i % 500, Surname = "Surname" + (5000 - i) % 1000
}).ToList();
LocalDataSourceProvider provider = new LocalDataSourceProvider();
using (provider.DeferRefresh())
{
provider.GroupFactory = new DataGroupFactory();
provider.SortDescriptions.Add(new PropertySortDescription()
{
PropertyName = "Name", SortOrder = SortOrder.Descending
});
provider.SortDescriptions.Add(new PropertySortDescription()
{
PropertyName = "ID", SortOrder = SortOrder.Descending
});
provider.ItemsSource = data;
}
provider.BlockUntilRefreshCompletes();
DataItemComparer comparer = new DataItemComparer(new DataItemNameComparer()
{
Descending = true
}, new DataItemIDComparer()
{
Descending = true
});
data.Sort(comparer);
for (int i = 0; i < data.Count; i++)
{
Assert.AreSame(data[i], provider.Results.Root.RowGroup.Items[i]);
}
}
