C#

Member 3708190 wrote:

in('CatagoryA, CatagoryB)

Member 3708190 wrote:

in('CatagoryA', 'CatagoryB')

• Maintain a list of data objects, containing the data you want:
  

  class Person : BaseNotifier {
   private string name;
   public string Name { get { return name; } set { name = value; Notify('Name'); } }
   private string state;
   public string State { get { return state; } set { state = value; Notify('State'); } }
  }

  
  (BaseNotifier is a simple implementation of INotifyPropertyChanged, see end of post), and in your main class:
  
  

  List<Person> people = new List<Person>();

  
  
• Create a custom control that can be bound to a person:
  

  class PersonPanel : Panel, INotifyPropertyChanged {
   TextBox nameTextBox;
   ComboBox stateCombo;
   // for the sake of example, probably would be held elsewhere or loaded from database
   public static readonly string[] States = { "NSW", "SA", "WA", "NT", "ACT", "TAS" };
  
   public PersonPanel(){
    Width = 200;
    Height = 30;
    Controls.Add(nameTextBox = new TextBox());
    nameTextBox.Left = nameTextBox.Top = 5;
    // ... etc
  
    nameTextBox.TextChanged += (s, e) => Notify("Name");
    stateCombo.SelectedIndexChanged += (s, e) => Notify("State");
   }
   
   public string Name {
    get { return nameTextBox.Text; }
    set { nameTextBox.Text = value; }
   }
    
   public string State {
    get { return (string)stateCombo.SelectedItem; }
    set { stateCombo.SelectedItem = value; }
   }
  
   public event PropertyChangedEventHandler PropertyChanged;
  
   private void Notify(string property){
    PropertyChangedEventHandler h = PropertyChanged;
    if(null != h) h(this, new PropertyChangedEventArgs(property));
   }
  }

  
  The notification is so two way data binding can work.
  
  
• When you add a new person, create and bind one of these to a new Person object
  

  void AddNewPerson(){
   Person person = new Person();
   if(people.Count > 0) person.State = people[people.Count - 1].State;
   people.Add(person);
  
   PersonPanel panel = new PersonPanel();
   panel.DataBindings.Add("Name", person, "Name");
   panel.DataBindings.Add("State", person, "State");
   Panel.Controls.Add(panel);
  }

  
  

public abstract class BaseNotifier : INotifyPropertyChanged {
 public event PropertyChangedEventHandler PropertyChanged;

 protected void Notify(string property){
  PropertyChangedEventHandler h = PropertyChanged;
  if(null != h) h(this, new PropertyChangedEventArgs(property));
 }
}