CheckCombox in Datagrid, when i scrollview the datagrid the selected checkcombox is disappear.......,

[imtect]

this is the error when scrollview the datagrid

Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=HorizontalContentAlignment; DataItem=null; target element is 'CheckComboBoxItem' (Name='PART_SelectAll'); target property is 'HorizontalContentAlignment' (type 'HorizontalAlignment')

[Yopler]

hi 🖐, When is this exception occur ? Can you give more details ?

Seem like a failing Binding than a error ! Is all your Bindings working ?