Question

I need to build two objects: an OrderList and an Order.

Using those two objects, I have to populate a DataGridView with a history of the orders. However, I am instructed not to use binding sources for the connection or other drag and drop controls. Unfortunately, from Google it seems like those are the most popular options for this type of problem.

Can anyone point me in the right direction? I don’t have much experience with C#.

Thanks.

Answer 1

You could to create an Order class:

public class Order
{
    public int OrderID { get; set; }
    public DateTime OrderDate { get; set; }
}

Read your database records and load your orders collection

List<Order> orders = new List<Order>();
using(SqlConnection cn = new SqlConnection("..."))
using (SqlCommand cm = cn.CreateCommand())
{
    cn.Open();
    cm.CommandText = "SELECT OrderId, OrderDate FROM Orders";
    SqlDataReader dr = cm.ExecuteReader();
    while (dr.Read())
    {
        orders.Add(new Order()
        {
            OrderId = dr.GetInt32(dr.GetOrdinal("OrderId")),
            OrderDate = dr.GetDateTime(dr.GetOrdinal("OrderDate"))
        });
    }
}

About GridView part, you should take a look into ASP.NET data binding overview