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C# / C Sharp » LINQ » Skip 




Nested Skip
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass {
    public static void Main() {
        List<Customer> customers = GetCustomerList();

        var waOrders =
            from c in customers
            from o in c.Orders
            where c.Region == "R1"
            select new c.CustomerId, o.Id, o.OrderDate };

        var allButFirst2Orders = waOrders.Skip(2);

        Console.WriteLine("All but first 2 orders in R1:");
        foreach (var order in allButFirst2Orders) {
            Console.WriteLine(order);
        }

    }
    static List<Customer> GetCustomerList() {
        List<Product> empTree = new List<Product>();
        empTree.Add(new Product ProductName = "A", Category = "O", UnitPrice = 12, UnitsInStock = 5, Total = 36, OrderDate = new DateTime(200511), Id = });
        empTree.Add(new Product ProductName = "B", Category = "O", UnitPrice = 2, UnitsInStock = 4, Total = 35, OrderDate = new DateTime(200511), Id = });
        empTree.Add(new Product ProductName = "C", Category = "O", UnitPrice = 112, UnitsInStock = 3, Total = 34, OrderDate = new DateTime(200511), Id = });
        empTree.Add(new Product ProductName = "D", Category = "O", UnitPrice = 112, UnitsInStock = 0, Total = 33, OrderDate = new DateTime(200511), Id = });
        empTree.Add(new Product ProductName = "E", Category = "O", UnitPrice = 1112, UnitsInStock = 2, Total = 32, OrderDate = new DateTime(200511), Id = });
        empTree.Add(new Product ProductName = "F", Category = "O", UnitPrice = 11112, UnitsInStock = 0, Total = 31, OrderDate = new DateTime(200511), Id = });

        List<Customer> l = new List<Customer>();
        l.Add(new Customer CompanyName = "A", Region = "R1", UnitsInStock = 1, Orders = empTree, CustomerId = });
        l.Add(new Customer CompanyName = "B", Region = "R2", UnitsInStock = 2, Orders = empTree, CustomerId = });
        l.Add(new Customer CompanyName = "C", Region = "R3", UnitsInStock = 3, Orders = empTree, CustomerId = });
        l.Add(new Customer CompanyName = "D", Region = "R4", UnitsInStock = 4, Orders = empTree, CustomerId = });
        l.Add(new Customer CompanyName = "E", Region = "R5", UnitsInStock = 5, Orders = empTree, CustomerId = });
        return l;
    }
}
class Customer : IComparable<Customer> {
    public string CompanyName get; set; }
    public string Region get; set; }
    public List<Product> Orders get; set; }
    public int UnitsInStock get; set; }
    public int CustomerId get; set; }

    public override string ToString() {
        return String.Format("Id: {0}, Name: {1}, Region: {3}"this.CustomerId, this.CompanyName, this.Region);
    }
    int IComparable<Customer>.CompareTo(Customer other) {
        if (other == null)
            return 1;

        if (this.CustomerId > other.CustomerId)
            return 1;

        if (this.CustomerId < other.CustomerId)
            return -1;

        return 0;
    }
}
class Product : IComparable<Product> {
    public string ProductName get; set; }
    public string Category get; set; }
    public int UnitPrice get; set; }
    public int UnitsInStock get; set; }
    public int Total get; set; }
    public DateTime OrderDate get; set; }
    public int Id get; set; }

    public override string ToString() {
        return String.Format("Id: {0}, Name: {1} , Category: {3}"this.Id, this.ProductName, this.Category);
    }
    int IComparable<Product>.CompareTo(Product other) {
        if (other == null)
            return 1;
        if (this.Id > other.Id)
            return 1;

        if (this.Id < other.Id)
            return -1;

        return 0;
    }
}

 














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