/// <summary>
/// Handles the initialized event. If SortProperty is defined then the sort will be applied.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnInitialized(EventArgs e)
{
// Handle the event when a header is clicked.
this.AddHandler(GridViewColumnHeader.ClickEvent, new RoutedEventHandler(this.OnHeaderClicked));
if (this.SortProperty != null && !string.IsNullOrEmpty(this.SortProperty))
{
GridView gridView = this.View as GridView;
if (gridView != null)
{
foreach (SortGridViewColumn column in gridView.Columns)
{
if (column.SortProperty == this.SortProperty)
{
this.sortColumn = column;
}
}
if (this.sortColumn != null)
{
this.SortList();
this.UpdateHeaderTemplate();
this.UpdateGroupTemplate();
}
}
}
base.OnInitialized(e);
}
/// <summary>
/// A header was clicked. Sort and group by the associated column.
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event arguments.</param>
private void OnHeaderClicked(object sender, RoutedEventArgs e)
{
// Make sure the column is really being sorted.
GridViewColumnHeader header = e.OriginalSource as GridViewColumnHeader;
if (header == null || header.Role == GridViewColumnHeaderRole.Padding)
{
return;
}
SortGridViewColumn column = header.Column as SortGridViewColumn;
if (column == null)
{
return;
}
// See if a new column was clicked, or the same column was clicked.
if (this.sortColumn != column)
{
// A new column was clicked.
this.previousSortColumn = this.sortColumn;
this.sortColumn = column;
this.SortDirection = ListSortDirection.Ascending;
this.SortProperty = column.SortProperty;
}
else
{
// The same column was clicked, change the sort order.
this.previousSortColumn = null;
this.SortDirection = (this.SortDirection == ListSortDirection.Ascending) ? ListSortDirection.Descending : ListSortDirection.Ascending;
}
this.UpdateHeaderTemplate();
this.UpdateGroupTemplate();
this.SortList();
}
