1）由控件获取内容：
ListViewItem item =
Utilities.GetVisualParent<ListViewItem>(chx);
if (item
== null) return;
ListView2.SelectedItems.Clear();
item.IsSelected = true;
Outpatient outpatient =
item.Content as Outpatient;
2）
Patientappointment appointment = ListView1.SelectedItem as
Patientappointment;