how to add two row in calendar?

I recommend you to download the trial version of the calendar. It comes with many examples and one of them is how to add resrouces. it's quite simple.

string[] resources = new string[] {"A", "B", "C"};

for (int i = 0; i < 3; i++)
{

Column c = new Column(resources[i], resources[i]);
DayPilotCalendar1.Columns.Add(c);

for (int j = 0; j < 2; j++)
{
DateTime day = first.AddDays(j);

Column subC = new Column(day.ToShortDateString(), resources[i]);
subC.Date = day;
c.Children.Add(subC);
}
}

thanks,

now its working fine but events are not binding in calendar.

my code is:

private void defineColumns()
{

DayPilotCalendar1.Columns.Clear();
DateTime day = DayPilotCalendar1.StartDate;
Column c = new Column(day.ToShortDateString(), day.ToString("s"));

DayPilotCalendar1.Update(CallBackUpdateType.Full);

c.Date = day;
DayPilotCalendar1.Columns.Add(c);

foreach (DataRow dr in dt.Rows)
{
Column c1 = new Column((string)dr["name"], dr["name"].ToString());
c1.Date = day;
c.Children.Add(c1);

}

}

when i click on navigater events are not bind in calendar.

If the Navigator clicks don't update the Calendar, you need to check if you are handling Command event properly and doing the actual update for e.Command == "navigate".

Example:

protected void DayPilotCalendar1_Command(object sender, CommandEventArgs e)
{
  switch (e.Command)
  {
    case "navigate":
      DateTime start = (DateTime) e.Data["start"];
      DayPilotCalendar1.StartDate = start;
      DayPilotCalendar1.DataBind();
      DayPilotCalendar1.Update();
      break;
    // other custom commands handled here
  }
}

You also need to check whether the Value of the bottom-most Column (the deepest child) matches the Resource value of the Event (value of column defined using DataResourceField).