Question

How loop sub classes properties from the main class?

public class GroupA
{
  public string FullName = "", BirthDay = "";
}
public class GroupB
{
  public string Email = "";
}
public class GroupC
{
  public string Phone;
}

public class MainGroup
{
  public GroupA GroupA;
  public GroupB GroupB;
  public GroupC GroupC;
}


    protected void Page_Load(object sender, EventArgs e)
    {

      GroupA  NewGroupA = new GroupA();
              NewGroupA.FullName="TEST MASTER";
              NewGroupA.BirthDay="02/20/1984";
      GroupB  NewGroupB = new GroupB();
              NewGroupB.Email="[e-mail]"; 
      GroupC  NewGroupC=new GroupC();
              NewGroupC.Phone="555 123 4567";

      //Assign new class instances to the main class
      MainGroup NewMainGroup= new MainGroup();
                NewMainGroup.GroupA=NewGroupA;
                NewMainGroup.GroupB=NewGroupB;                 
                NewMainGroup.GroupC=NewGroupC;

      //Loop through the main class

      foreach (var Group in typeof(MainGroup).GetFields())
      {
        Response.Write("<BR>MainGroupName=  " + Group.Name + " Value=  " + Group.GetValue(NewMainGroup).ToString());
        //PROBLEM IS HERE. Can't loop through the subclass We need to display the GroupA, GroupB, GroupC below.
        foreach (var SubGroup in Group)
        {
          Response.Write("<BR>");
        }


      }
}

Answer 1

What you should to is store a reference to the group-variable (not just the type). So, if you take your code and do something like this:

foreach (var GroupType in typeof(MainGroup).GetFields())
{
    object Group = GroupType.GetValue(NewMainGroup);
    Response.Write("<BR>MainGroupName=  " + GroupType.Name + " Value=  " + Group.ToString());
    foreach(var SubGroupType in Group.GetType().GetFields()) {
        object SubGroup = SubGroupType.GetValue(Group);
        Response.Write("<BR>SubGroupName= " + SubGroupType.Name + " Value= " + SubGroup.ToString());
    }
}

Haven’t tested it, but I think that should about work. At least get you started.

Oh, and by the way, I think I have a better method for you, try this one:

public Dictionary<string, object> GetObjectFields(object obj) {
    var dict = new Dictionary<string, object>();
    var t = obj.GetType();
    foreach(var f in t.GetFields()) {
        dict[f.Name] = f.GetValue(obj);
    }
    return dict;
}

Then you can simply do this:

var groupVars = GetObjectFields(NewMainGroup);
foreach(var gv in groupVars) {
    Response.Write(<BR>MainGroupName=  " + gv.Key + " Value=  " + gv.Value.ToString());
    var subGroupVars = GetObjectFields(gv.Value);
    foreach(var sgv in subGroupVars) {
        Response.Write(<BR>SubGroupName=  " + sgv.Key + " Value=  " + sgv.Value.ToString());
    }
}