private void InitColumnHeader(object args)
{
RoutedEventArgs routedEventArgs = args as RoutedEventArgs;
DataGridColumnHeader columnHeader = (routedEventArgs.OriginalSource as Grid).GetParent <DataGridColumnHeader>();
if (columnHeader == null || columnHeader.Column == null)
{
return;
}
foreach (var column in this.Columns)
{
if (columnHeader.Column == column)
{
bool isFilter = (bool)column.GetValue(ColumnConfiguration.CanClassFilterProperty);
DataGridColumnHeaderFilter headerFilter = new DataGridColumnHeaderFilter();
headerFilter.DataGridExtend = this;
headerFilter.FilterType = FilterType;
headerFilter.FilterFinsh += HeaderFilter_FilterFinsh;
headerFilter.IsVisiable = isFilter;
columnHeader.Tag = headerFilter;
DataGridColumnHeaders.Add(columnHeader);
}
}
}
private void HeaderFilter_FilterFinsh(object sender, RoutedEventArgs e)
{
Predicate <object> predicate = null;
foreach (var item in DataGridColumnHeaders)
{
DataGridColumnHeaderFilter dataGridColumnHeaderFilter = item.Tag as DataGridColumnHeaderFilter;
if (dataGridColumnHeaderFilter.Predicate == null)
{
continue;
}
if (predicate == null)
{
predicate = dataGridColumnHeaderFilter.Predicate;
}
else
{
predicate = predicate.Or(dataGridColumnHeaderFilter.Predicate);
}
}
ListCollectionView view = CollectionViewSource.GetDefaultView(this.ItemsSource) as ListCollectionView;
if (view != null && view.IsEditingItem)
{
view.CommitEdit();
}
if (view != null && view.IsAddingNew)
{
view.CommitNew();
}
if (CollectionView != null)
{
try
{
CollectionView.Filter = predicate;
}
catch
{
}
}
}
