protected void defaultSort()
{
if (ItemsSource == null)
{
return;
}
this.SelectedIndex = 0;
GridView gridView = this.View as GridView;
if (gridView != null)
{
SortableGridViewColumn sortableGridViewColumn = null;
foreach (GridViewColumn gridViewColumn in gridView.Columns)
{
sortableGridViewColumn = gridViewColumn as SortableGridViewColumn;
if (sortableGridViewColumn != null)
{
if (sortableGridViewColumn.IsDefaultSortColumn)
{
break;
}
sortableGridViewColumn = null;
}
}
if (sortableGridViewColumn != null)
{
lastSortedOnColumn = sortableGridViewColumn;
Sort(sortableGridViewColumn.SortPropertyName, ListSortDirection.Ascending);
if (!String.IsNullOrEmpty(this.ColumnHeaderSortedAscendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedAscendingTemplate) as DataTemplate;
}
this.SelectedIndex = 0;
}
}
}
private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
{
GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader;
if (headerClicked != null && headerClicked.Role != GridViewColumnHeaderRole.Padding)
{
SortableGridViewColumn sortableGridViewColumn = (headerClicked.Column) as SortableGridViewColumn;
if (sortableGridViewColumn != null && !String.IsNullOrEmpty(sortableGridViewColumn.SortPropertyName))
{
ListSortDirection direction;
bool newSortColumn = false;
if (lastSortedOnColumn == null
|| String.IsNullOrEmpty(lastSortedOnColumn.SortPropertyName)
|| !String.Equals(sortableGridViewColumn.SortPropertyName, lastSortedOnColumn.SortPropertyName, StringComparison.InvariantCultureIgnoreCase))
{
newSortColumn = true;
direction = ListSortDirection.Ascending;
}
else
{
if (lastDirection == ListSortDirection.Ascending)
{
direction = ListSortDirection.Descending;
}
else
{
direction = ListSortDirection.Ascending;
}
}
string sortPropertyName = sortableGridViewColumn.SortPropertyName;
Sort(sortPropertyName, direction);
if (direction == ListSortDirection.Ascending)
{
if (!String.IsNullOrEmpty(this.ColumnHeaderSortedAscendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedAscendingTemplate) as DataTemplate;
}
else
{
sortableGridViewColumn.HeaderTemplate = null;
}
}
else
{
if (!String.IsNullOrEmpty(this.ColumnHeaderSortedDescendingTemplate))
{
sortableGridViewColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderSortedDescendingTemplate) as DataTemplate;
}
else
{
sortableGridViewColumn.HeaderTemplate = null;
}
}
if (newSortColumn && lastSortedOnColumn != null)
{
if (!String.IsNullOrEmpty(this.ColumnHeaderNotSortedTemplate))
{
lastSortedOnColumn.HeaderTemplate = this.TryFindResource(ColumnHeaderNotSortedTemplate) as DataTemplate;
}
else
{
lastSortedOnColumn.HeaderTemplate = null;
}
}
lastSortedOnColumn = sortableGridViewColumn;
}
}
}
