private void AssociatedObject_Sorting(object sender, GridViewSortingEventArgs e)
{
e.Cancel = true;
var sortByPropertyName = (( GridViewDataColumn )e.Column).DataMemberBinding.Path.Path;
switch (e.OldSortingState)
{
case SortingState.None:
e.NewSortingState = SortingState.Ascending;
SortDirection = ListSortDirection.Ascending;
SortBy = sortByPropertyName;
break;
case SortingState.Ascending:
e.NewSortingState = SortingState.Descending;
SortDirection = ListSortDirection.Descending;
SortBy = sortByPropertyName;
break;
case SortingState.Descending:
SortDirection = ListSortDirection.Ascending;
SortBy = sortByPropertyName;
break;
default:
break;
}
// Sort executed server-side.
SortCommand.Execute(null);
}
private void OnSorting(object sender, DataGridSortingEventArgs eventArgs)
{
eventArgs.Handled = true;
if (SortCommand != null)
{
var column = eventArgs.Column;
var sortDirection = GetNextSortDirection(column.SortDirection);
column.SortDirection = sortDirection;
SortCommand.Execute(new SortData(column.Header.ToString(), sortDirection));
}
}
private void HeaderCell_OnHeaderTapped(object sender, DataGridColumn dataGridColumn)
{
if (_currentSortingColumn != dataGridColumn && dataGridColumn.SortingEnabled)
{
_currentSortingColumn?.ResetOrderType();
_currentSortingColumn = dataGridColumn;
}
if (_autoSort && _currentSortingColumn != null && _currentSortingColumn.SortingEnabled)
{
var orderQuery = ItemsSource.AsQueryable().SortBy(_currentSortingColumn.PropertyName, _currentSortingColumn.SortOrderType);
SortCommand?.Execute(orderQuery);
}
HeaderTappedCommand?.Execute(dataGridColumn);
}
private void MouseDownOnHeaderCell(object sender, MouseEventArgs args)
{
var cellClicked = (( FrameworkElement )args.OriginalSource).ParentOfType <GridViewHeaderCell> ();
if (cellClicked == null)
{
return;
}
var column = ( GridViewDataColumn )cellClicked.Column;
var sortByPropertyName = (column).DataMemberBinding.Path.Path;
var oldSortDirection = SortDirection;
if (sortByPropertyName != SortBy)
{
oldSortDirection = ListSortDirection.Descending;
}
switch (oldSortDirection)
{
case ListSortDirection.Ascending:
column.SortingState = SortingState.Descending;
SortDirection = ListSortDirection.Descending;
SortBy = sortByPropertyName;
break;
case ListSortDirection.Descending:
column.SortingState = SortingState.Ascending;
SortDirection = ListSortDirection.Ascending;
SortBy = sortByPropertyName;
break;
default:
break;
}
// Sort executed server-side.
SortCommand.Execute(null);
}
