Hello,
I am using observable collection of StaffMember and which as has 3 members - StaffCategory(string), StaffTypes(string), Staff(List)ObservableCollection<StaffMember> StaffMembers StaffCategory and StaffTypes are column 1 and 2 which are constant and created in XAML view as a fields of XamDataGrid. Depending on number of Staff, multiple columns gets populated column3 onwards . All this operation happening on button click. After this, I would like to update FieldLayout depending on number of Staff in collection. If I use xamDataGrid_FieldLayoutInitialized then fieldlayout shows all columns. This done from constructor. private void Xdg_OnFieldLayoutInitialized(object sender, Infragistics.Windows.DataPresenter.Events.FieldLayoutInitializedEventArgs e) { var staffMember = this.ViewModel.StaffMembers.First(); for (Int32 i = 0; i < staffMember.Staff.Count; i++) { var field = new UnboundField { Name = staffMember.Staff[i].Name, BindingMode = BindingMode.TwoWay, BindingPath = new PropertyPath(String.Format("Staff[{0}].Value", i)) }; field.Settings.EditAsType = typeof(String); e.FieldLayout.Fields.Add(field); } } However, when I doing using button click.. it is not showing columns private void BtnGenerate_OnClick(object sender, RoutedEventArgs e) { var staffMember = this.ViewModel.StaffMembers.First(); for (Int32 i = 0; i < StaffMember.Staff.Count; i++) { var field = new UnboundField { Name = StaffMember.Staff[i].Name, BindingMode = BindingMode.TwoWay, BindingPath = new PropertyPath(String.Format("Staff[{0}].Value", i)) }; field.Settings.EditAsType = typeof(String); xdg.FieldLayouts[0].Fields.Add(field); } } Please help me on this if I am missing anything here.