Programmatically generate and assign ComboBox DataSource

Question

I have a ComboBox named cmbWeekDays, a WeekDay class:

public class WeekDay
{ 
    public int Index;
    public string DayName;
}

and this FormLoad event:

List<WeekDay> days = new List<WeekDay>();
days.Add(new WeekDay { DayName = "Sat", Index = 1 });
days.Add(new WeekDay { DayName = "Sun", Index = 2 });
days.Add(new WeekDay { DayName = "Mon", Index = 3 });
days.Add(new WeekDay { DayName = "Tue", Index = 4 });
days.Add(new WeekDay { DayName = "Wed", Index = 5 });
days.Add(new WeekDay { DayName = "Thu", Index = 6 });
days.Add(new WeekDay { DayName = "Fri", Index = 7 });

cmbxWeekDays.DataSource = days;
cmbxWeekDays.DisplayMember = "DayName";
cmbxWeekDays.ValueMember = "Index";
cmbxWeekDays.Refresh();

I don't know why I get this weird result:

Can any one explain me what's happening? and also how to overcome this issue?

Answer 1

Data binding works with properties only. So, you have to declare properties in your data source class instead of fields:

public class WeekDay
{
    public int Index { get; set; }
    public string DayName { get; set; }
}