uses a compound orderby to sort a list of products, first by category, and then by unit price, from highest to lowest. : OrderBy « LINQ « C# / C Sharp






  1. C# / C Sharp
  2. LINQ
  3. OrderBy

uses a compound orderby to sort a list of products, first by category, and then by unit price, from highest to lowest.

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

public class MainClass {
    public static void Main() {

        List<Product> products = GetProductList();
        var sortedProducts =
            from p in products
            orderby p.Category, p.UnitPrice descending select p;

        foreach (var s in sortedProducts) {
            Console.Write(s);
        }
    }
    static List<Product> GetProductList() {
        List<Product> empTree = new List<Product>();
        empTree.Add(new Product { ProductName = "A", Category = "O", UnitPrice = 12, UnitsInStock = 5, Total = 36, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        empTree.Add(new Product { ProductName = "B", Category = "O", UnitPrice = 2, UnitsInStock = 4, Total = 35, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        empTree.Add(new Product { ProductName = "C", Category = "O", UnitPrice = 112, UnitsInStock = 3, Total = 34, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        empTree.Add(new Product { ProductName = "D", Category = "O", UnitPrice = 112, UnitsInStock = 0, Total = 33, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        empTree.Add(new Product { ProductName = "E", Category = "O", UnitPrice = 1112, UnitsInStock = 2, Total = 32, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        empTree.Add(new Product { ProductName = "F", Category = "O", UnitPrice = 11112, UnitsInStock = 0, Total = 31, OrderDate = new DateTime(2005, 1, 1), Id = 1 });
        return empTree;
    }
}
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;
    }
}








Related examples in the same category

1.OrderBy: prints an alphabetically sorted version of a string array
2.string array sorted by the length each element
3.products sorted alphabetically by the product name
4.OrderBy with customized Comparer
5.OrderBy with passing a lambda function
6.OrderBy Descending
7.products sorted by the number of units of each product that are in stock
8.sorted alphabetically in descending order, using a case insensitive comparision.
9.uses a compound orderby to sort a list of digits first by length of their name, and then alphabetically.
10.an array of string values sorted first by length, then sorted alphabetically, using a case-insentive comparison.
11.First OrderBy Prototype
12.Where with OrderBy