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How to raise the Filters Collections Changed event
1 min read
The Property changed event of the filter item will be raised whenever there is a change at checkbox of that filter Item at FilterPopup. Please refer the below code snippet which illustrate the same.
C#
public MainWindow()
{
InitializeComponent();
this.pivotGrid1.Loaded += new RoutedEventHandler(pivotGrid1_Loaded);
}
void pivotGrid1_Loaded(object sender, RoutedEventArgs e)
{
this.pivotGrid1.GroupingBar.RowHeaderArea.Drop += new DragEventHandler(RowHeaderArea_Drop);
this.pivotGrid1.Filters.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Filters_CollectionChanged);
this.pivotGrid1.GroupingBar.FilterPopup.Closed += new EventHandler(FilterPopup_Closed);
}
void RowHeaderArea_Drop(object sender, DragEventArgs e)
{
this.pivotGrid1.CollapseAllGroup();
}
void Filters_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
foreach (var item in e.NewItems)
{
if ((item is FilterExpression) && (item as FilterExpression).Tag is FilterItemsCollection)
{
FilterItemsCollection filterList = (item as FilterExpression).Tag as FilterItemsCollection;
filterList.AllFilterItem.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(AllFilterItem_PropertyChanged);
for (int i = 0; i < filterList.Count; i++)
filterList[i].PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler(MainWindow_PropertyChanged);
}
}
this.pivotGrid1.CollapseAllGroup();
}
void MainWindow_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
//Execute when click on the check box of the items(including "All") exist at Filter Popup
}
void AllFilterItem_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
//Execute when click on the "All" item's checkbox exist at Filter Popup
}
void FilterPopup_Closed(object sender, EventArgs e)
{
this.pivotGrid1.CollapseAllGroup();
}
}
Please use the FilterPopup.Closed event to perform the functions like collapse, collapse all , expand or expand all after each filtering, since these functionalities will close the popup once it done hence we could not proceed with the further operations like check/uncheck the filter item.
void pivotGrid1_Loaded(object sender, RoutedEventArgs e)
{
this.pivotGrid1.GroupingBar.RowHeaderArea.Drop += new DragEventHandler(RowHeaderArea_Drop);
this.pivotGrid1.Filters.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Filters_CollectionChanged);
this.pivotGrid1.GroupingBar.FilterPopup.Closed += new EventHandler(FilterPopup_Closed);
}
void FilterPopup_Closed(object sender, EventArgs e)
{
this.pivotGrid1.CollapseAllGroup();
}
