private static void HandleCustomSorting(object sender, DataGridSortingEventArgs e)
{
DataGrid dataGrid = sender as DataGrid;
if (dataGrid == null || !GetAllowCustomSort(dataGrid))
{
return;
}
ListCollectionView listColView = dataGrid.ItemsSource as ListCollectionView;
if (listColView == null)
{
throw new InvalidCastException("ItemsSource property must be type of ListCollectionView.");
}
ICustomSorter sorter = GetCustomSorter(e.Column);
if (sorter == null)
{
return;
}
e.Handled = true;
ListSortDirection direction = (e.Column.SortDirection != ListSortDirection.Ascending)
? ListSortDirection.Ascending
: ListSortDirection.Descending;
e.Column.SortDirection = direction;
sorter.SortDirection = direction;
listColView.CustomSort = sorter;
}
public static void SetCustomSorter(DataGridColumn gridColumn, ICustomSorter value)
{
gridColumn.SetValue(CustomSorterProperty, value);
}
public static void SetCustomSorter(DataGridColumn gridColumn, ICustomSorter value)
{
gridColumn.SetValue(CustomSorterProperty, value);
}
public static void SetCustomSorter(DataGrid grid, ICustomSorter value)
{
grid.SetValue(CustomSorterProperty, value);
}
public ColumnHolder(DataGridColumn column, int sortOrder, ICustomSorter customSorter = null)
{
this.column = column;
this.sortOrder = sortOrder;
this.customSorter = customSorter;
}