Using while loop for sqldatareader

Using while loop for sqldatareader

I trying to get both policeid and fullname from my table named
PoliceAccount when the handle column equal to the value of the
dropdownlist and then put the value into a label and display it. By using
the code provided below I keep getting the result of the last row data of
policeid and fullname. However, my table contain of 2 police account which
having the column handle equal to the value of the dropdownlist. Do help
me out. THANKS!
conn.Open();
sql = "Select policeid, fullname From PoliceAccount Where handle = '"+
ddlReportDateTime.SelectedValue +"'";
using (var cmd2 = new SqlCommand(sql, conn))
{
SqlDataReader dr;
dr = cmd2.ExecuteReader();
while (dr.Read())
{
String policeid = dr.GetString(0);
String fullname = dr.GetString(1);
String result = policeid + " " + fullname;
lblAssignTo.Text = result;
}
}
conn.Close();