//更新SortDescription类型
static void UpdateSortDescription(ICollectionView view, SortData sortData)
{
var listCollec = view as ListCollectionView;
var srcType = view.SourceCollection.GetType();
if (listCollec == null || (!srcType.IsGenericType && !srcType.IsArray))
{
view.SortDescriptions.Clear();
view.SortDescriptions.Add(new SortDescription(sortData.PropertyName, sortData.Direction));
}
else
{
Type targetType;
if (srcType.IsArray)
{
targetType = srcType.GetElementType();
}
else
{
targetType = srcType.GetGenericArguments()[0];
}
listCollec.CustomSort = new ListItemComparer(sortData, targetType);
}
sortData.Direction = GetReverseDirection(sortData.Direction);
}
static void SetSortData(DependencyObject d, SortData value)
{
if (d == null)
{
return;
}
d.SetValue(SortDataProperty, value);
}
static void OnSortPropertyChanged(DependencyObject dobj, DependencyPropertyChangedEventArgs e)
{
var column = dobj as GridViewColumn;
var propName = (string)e.NewValue;
var sortData = GetSortData(column);
if (sortData == null)
{
SetSortData(column, sortData = new SortData(propName));
}
if (column.CellTemplate == null
&&
column.CellTemplateSelector == null)
{
var binding = new Binding(sortData.PropertyName);
column.DisplayMemberBinding = binding;
}
}
public ListItemComparer(SortData sortdata, Type targetType)
{
del = CompileInstanceProperty(targetType, sortdata.PropertyName);
Direction = sortdata.Direction;
}