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using System;
using System.Data;
namespace NavigationCS
{
class Program
{
static void Main()
{
DataSet customerOrders = new DataSet();
// <Snippet1>
DataRelation customerOrdersRelation =
customerOrders.Relations.Add("CustOrders",
customerOrders.Tables["Customers"].Columns["CustomerID"],
customerOrders.Tables["Orders"].Columns["CustomerID"]);
DataRelation orderDetailRelation =
customerOrders.Relations.Add("OrderDetail",
customerOrders.Tables["Orders"].Columns["OrderID"],
customerOrders.Tables["OrderDetails"].Columns["OrderID"], false);
DataRelation orderProductRelation =
customerOrders.Relations.Add("OrderProducts",
customerOrders.Tables["Products"].Columns["ProductID"],
customerOrders.Tables["OrderDetails"].Columns["ProductID"]);
foreach (DataRow custRow in customerOrders.Tables["Customers"].Rows)
{
Console.WriteLine("Customer ID: " + custRow["CustomerID"]);
foreach (DataRow orderRow in custRow.GetChildRows(customerOrdersRelation))
{
Console.WriteLine(" Order ID: " + orderRow["OrderID"]);
Console.WriteLine("\tOrder Date: " + orderRow["OrderDate"]);
foreach (DataRow detailRow in orderRow.GetChildRows(orderDetailRelation))
{
Console.WriteLine("\t Product: " +
detailRow.GetParentRow(orderProductRelation)["ProductName"]);
Console.WriteLine("\t Quantity: " + detailRow["Quantity"]);
}
}
}
// </Snippet1>
}
}
}