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Merge pull request dotnet#108 from matthewreily/linq-samples-for-restriction
Linq samples for restriction
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‎samples/linq/csharp/restriction/Data.cs

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using System.Collections.Generic;
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namespace Restriction
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{
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//The Data class is used as a fake repository
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public class Data
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{
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public static List<Product> Products { get; } = new List<Product>()
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{
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new Product { ProductID = 1, ProductName = "Chai", Category = "Beverages", UnitPrice = 18.0000M, UnitsInStock = 39 },
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new Product { ProductID = 2, ProductName = "Chang", Category = "Beverages", UnitPrice = 19.0000M, UnitsInStock = 17 },
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new Product { ProductID = 3, ProductName = "Aniseed Syrup", Category = "Condiments", UnitPrice = 10.0000M, UnitsInStock = 13 },
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new Product { ProductID = 4, ProductName = "Chef Anton's Cajun Seasoning", Category = "Condiments", UnitPrice = 22.0000M, UnitsInStock = 53 },
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new Product { ProductID = 5, ProductName = "Chef Anton's Gumbo Mix", Category = "Condiments", UnitPrice = 21.3500M, UnitsInStock = 0 },
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new Product { ProductID = 6, ProductName = "Grandma's Boysenberry Spread", Category = "Condiments", UnitPrice = 25.0000M, UnitsInStock = 120 },
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new Product { ProductID = 7, ProductName = "Uncle Bob's Organic Dried Pears", Category = "Produce", UnitPrice = 30.0000M, UnitsInStock = 15 },
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new Product { ProductID = 8, ProductName = "Northwoods Cranberry Sauce", Category = "Condiments", UnitPrice = 40.0000M, UnitsInStock = 6 },
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new Product { ProductID = 9, ProductName = "Mishi Kobe Niku", Category = "Meat/Poultry", UnitPrice = 97.0000M, UnitsInStock = 29 },
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new Product { ProductID = 10, ProductName = "Ikura", Category = "Seafood", UnitPrice = 31.0000M, UnitsInStock = 31 },
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new Product { ProductID = 11, ProductName = "Queso Cabrales", Category = "Dairy Products", UnitPrice = 21.0000M, UnitsInStock = 22 },
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new Product { ProductID = 12, ProductName = "Queso Manchego La Pastora", Category = "Dairy Products", UnitPrice = 38.0000M, UnitsInStock = 86 },
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new Product { ProductID = 13, ProductName = "Konbu", Category = "Seafood", UnitPrice = 6.0000M, UnitsInStock = 24 },
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new Product { ProductID = 14, ProductName = "Tofu", Category = "Produce", UnitPrice = 23.2500M, UnitsInStock = 35 },
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new Product { ProductID = 15, ProductName = "Genen Shouyu", Category = "Condiments", UnitPrice = 15.5000M, UnitsInStock = 39 },
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new Product { ProductID = 16, ProductName = "Pavlova", Category = "Confections", UnitPrice = 17.4500M, UnitsInStock = 29 },
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new Product { ProductID = 17, ProductName = "Alice Mutton", Category = "Meat/Poultry", UnitPrice = 39.0000M, UnitsInStock = 0 },
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new Product { ProductID = 18, ProductName = "Carnarvon Tigers", Category = "Seafood", UnitPrice = 62.5000M, UnitsInStock = 42 },
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new Product { ProductID = 19, ProductName = "Teatime Chocolate Biscuits", Category = "Confections", UnitPrice = 9.2000M, UnitsInStock = 25 },
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new Product { ProductID = 20, ProductName = "Sir Rodney's Marmalade", Category = "Confections", UnitPrice = 81.0000M, UnitsInStock = 40 },
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new Product { ProductID = 21, ProductName = "Sir Rodney's Scones", Category = "Confections", UnitPrice = 10.0000M, UnitsInStock = 3 },
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new Product { ProductID = 22, ProductName = "Gustaf's Knäckebröd", Category = "Grains/Cereals", UnitPrice = 21.0000M, UnitsInStock = 104 },
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new Product { ProductID = 23, ProductName = "Tunnbröd", Category = "Grains/Cereals", UnitPrice = 9.0000M, UnitsInStock = 61 },
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new Product { ProductID = 24, ProductName = "Guaraná Fantástica", Category = "Beverages", UnitPrice = 4.5000M, UnitsInStock = 20 },
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new Product { ProductID = 25, ProductName = "NuNuCa Nuß-Nougat-Creme", Category = "Confections", UnitPrice = 14.0000M, UnitsInStock = 76 },
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new Product { ProductID = 26, ProductName = "Gumbär Gummibärchen", Category = "Confections", UnitPrice = 31.2300M, UnitsInStock = 15 },
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new Product { ProductID = 27, ProductName = "Schoggi Schokolade", Category = "Confections", UnitPrice = 43.9000M, UnitsInStock = 49 },
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new Product { ProductID = 28, ProductName = "Rössle Sauerkraut", Category = "Produce", UnitPrice = 45.6000M, UnitsInStock = 26 },
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new Product { ProductID = 29, ProductName = "Thüringer Rostbratwurst", Category = "Meat/Poultry", UnitPrice = 123.7900M, UnitsInStock = 0 },
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new Product { ProductID = 30, ProductName = "Nord-Ost Matjeshering", Category = "Seafood", UnitPrice = 25.8900M, UnitsInStock = 10 },
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new Product { ProductID = 31, ProductName = "Gorgonzola Telino", Category = "Dairy Products", UnitPrice = 12.5000M, UnitsInStock = 0 },
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new Product { ProductID = 32, ProductName = "Mascarpone Fabioli", Category = "Dairy Products", UnitPrice = 32.0000M, UnitsInStock = 9 },
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new Product { ProductID = 33, ProductName = "Geitost", Category = "Dairy Products", UnitPrice = 2.5000M, UnitsInStock = 112 },
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new Product { ProductID = 34, ProductName = "Sasquatch Ale", Category = "Beverages", UnitPrice = 14.0000M, UnitsInStock = 111 },
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new Product { ProductID = 35, ProductName = "Steeleye Stout", Category = "Beverages", UnitPrice = 18.0000M, UnitsInStock = 20 },
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new Product { ProductID = 36, ProductName = "Inlagd Sill", Category = "Seafood", UnitPrice = 19.0000M, UnitsInStock = 112 },
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new Product { ProductID = 37, ProductName = "Gravad lax", Category = "Seafood", UnitPrice = 26.0000M, UnitsInStock = 11 },
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new Product { ProductID = 38, ProductName = "Côte de Blaye", Category = "Beverages", UnitPrice = 263.5000M, UnitsInStock = 17 },
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new Product { ProductID = 39, ProductName = "Chartreuse verte", Category = "Beverages", UnitPrice = 18.0000M, UnitsInStock = 69 },
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new Product { ProductID = 40, ProductName = "Boston Crab Meat", Category = "Seafood", UnitPrice = 18.4000M, UnitsInStock = 123 },
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new Product { ProductID = 41, ProductName = "Jack's New England Clam Chowder", Category = "Seafood", UnitPrice = 9.6500M, UnitsInStock = 85 },
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new Product { ProductID = 42, ProductName = "Singaporean Hokkien Fried Mee", Category = "Grains/Cereals", UnitPrice = 14.0000M, UnitsInStock = 26 },
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new Product { ProductID = 43, ProductName = "Ipoh Coffee", Category = "Beverages", UnitPrice = 46.0000M, UnitsInStock = 17 },
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new Product { ProductID = 44, ProductName = "Gula Malacca", Category = "Condiments", UnitPrice = 19.4500M, UnitsInStock = 27 },
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new Product { ProductID = 45, ProductName = "Rogede sild", Category = "Seafood", UnitPrice = 9.5000M, UnitsInStock = 5 },
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new Product { ProductID = 46, ProductName = "Spegesild", Category = "Seafood", UnitPrice = 12.0000M, UnitsInStock = 95 },
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new Product { ProductID = 47, ProductName = "Zaanse koeken", Category = "Confections", UnitPrice = 9.5000M, UnitsInStock = 36 },
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new Product { ProductID = 48, ProductName = "Chocolade", Category = "Confections", UnitPrice = 12.7500M, UnitsInStock = 15 },
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new Product { ProductID = 49, ProductName = "Maxilaku", Category = "Confections", UnitPrice = 20.0000M, UnitsInStock = 10 },
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new Product { ProductID = 50, ProductName = "Valkoinen suklaa", Category = "Confections", UnitPrice = 16.2500M, UnitsInStock = 65 },
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new Product { ProductID = 51, ProductName = "Manjimup Dried Apples", Category = "Produce", UnitPrice = 53.0000M, UnitsInStock = 20 },
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new Product { ProductID = 52, ProductName = "Filo Mix", Category = "Grains/Cereals", UnitPrice = 7.0000M, UnitsInStock = 38 },
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new Product { ProductID = 53, ProductName = "Perth Pasties", Category = "Meat/Poultry", UnitPrice = 32.8000M, UnitsInStock = 0 },
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new Product { ProductID = 54, ProductName = "Tourtière", Category = "Meat/Poultry", UnitPrice = 7.4500M, UnitsInStock = 21 },
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new Product { ProductID = 55, ProductName = "Pâté chinois", Category = "Meat/Poultry", UnitPrice = 24.0000M, UnitsInStock = 115 },
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new Product { ProductID = 56, ProductName = "Gnocchi di nonna Alice", Category = "Grains/Cereals", UnitPrice = 38.0000M, UnitsInStock = 21 },
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new Product { ProductID = 57, ProductName = "Ravioli Angelo", Category = "Grains/Cereals", UnitPrice = 19.5000M, UnitsInStock = 36 },
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new Product { ProductID = 58, ProductName = "Escargots de Bourgogne", Category = "Seafood", UnitPrice = 13.2500M, UnitsInStock = 62 },
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new Product { ProductID = 59, ProductName = "Raclette Courdavault", Category = "Dairy Products", UnitPrice = 55.0000M, UnitsInStock = 79 },
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new Product { ProductID = 60, ProductName = "Camembert Pierrot", Category = "Dairy Products", UnitPrice = 34.0000M, UnitsInStock = 19 },
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new Product { ProductID = 61, ProductName = "Sirop d'érable", Category = "Condiments", UnitPrice = 28.5000M, UnitsInStock = 113 },
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new Product { ProductID = 62, ProductName = "Tarte au sucre", Category = "Confections", UnitPrice = 49.3000M, UnitsInStock = 17 },
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new Product { ProductID = 63, ProductName = "Vegie-spread", Category = "Condiments", UnitPrice = 43.9000M, UnitsInStock = 24 },
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new Product { ProductID = 64, ProductName = "Wimmers gute Semmelknödel", Category = "Grains/Cereals", UnitPrice = 33.2500M, UnitsInStock = 22 },
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new Product { ProductID = 65, ProductName = "Louisiana Fiery Hot Pepper Sauce", Category = "Condiments", UnitPrice = 21.0500M, UnitsInStock = 76 },
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new Product { ProductID = 66, ProductName = "Louisiana Hot Spiced Okra", Category = "Condiments", UnitPrice = 17.0000M, UnitsInStock = 4 },
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new Product { ProductID = 67, ProductName = "Laughing Lumberjack Lager", Category = "Beverages", UnitPrice = 14.0000M, UnitsInStock = 52 },
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new Product { ProductID = 68, ProductName = "Scottish Longbreads", Category = "Confections", UnitPrice = 12.5000M, UnitsInStock = 6 },
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new Product { ProductID = 69, ProductName = "Gudbrandsdalsost", Category = "Dairy Products", UnitPrice = 36.0000M, UnitsInStock = 26 },
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new Product { ProductID = 70, ProductName = "Outback Lager", Category = "Beverages", UnitPrice = 15.0000M, UnitsInStock = 15 },
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new Product { ProductID = 71, ProductName = "Flotemysost", Category = "Dairy Products", UnitPrice = 21.5000M, UnitsInStock = 26 },
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new Product { ProductID = 72, ProductName = "Mozzarella di Giovanni", Category = "Dairy Products", UnitPrice = 34.8000M, UnitsInStock = 14 },
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new Product { ProductID = 73, ProductName = "Röd Kaviar", Category = "Seafood", UnitPrice = 15.0000M, UnitsInStock = 101 },
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new Product { ProductID = 74, ProductName = "Longlife Tofu", Category = "Produce", UnitPrice = 10.0000M, UnitsInStock = 4 },
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new Product { ProductID = 75, ProductName = "Rhönbräu Klosterbier", Category = "Beverages", UnitPrice = 7.7500M, UnitsInStock = 125 },
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new Product { ProductID = 76, ProductName = "Lakkalikööri", Category = "Beverages", UnitPrice = 18.0000M, UnitsInStock = 57 },
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new Product { ProductID = 77, ProductName = "Original Frankfurter grüne Soße", Category = "Condiments", UnitPrice = 13.0000M, UnitsInStock = 32 }
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};
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}
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}

‎samples/linq/csharp/restriction/Product.cs

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namespace Restriction
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{
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public class Product
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{
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public int ProductID { get; set; }
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public string ProductName { get; set; }
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public string Category { get; set; }
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public decimal UnitPrice { get; set; }
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public int UnitsInStock { get; set; }
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}
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}

‎samples/linq/csharp/restriction/Program.cs

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{
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public class Program
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{
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//Entry point of application
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public void Main(string[] args)
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{
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var sample = new WhereClause1();
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sample.QuerySyntaxExample();
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sample.MethodSyntaxExample();
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//Invoke the linq restriction examples within the project
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WhereClause1.QuerySyntaxExample();
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WhereClause1.MethodSyntaxExample();
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WhereClause2.QuerySyntaxExample();
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WhereClause2.MethodSyntaxExample();
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WhereClause3.QuerySyntaxExample();
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WhereClause3.MethodSyntaxExample();
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WhereClause4.Example();
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}
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}
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}

‎samples/linq/csharp/restriction/Where-Sample-1.cs

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// 3
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// 2
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// 0
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public void QuerySyntaxExample()
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public static void QuerySyntaxExample()
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{
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int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
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// 3
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// 2
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// 0
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public void MethodSyntaxExample()
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public static void MethodSyntaxExample()
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{
4444
int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
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‎samples/linq/csharp/restriction/Where-Sample-2.cs

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using System.Linq;
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using System;
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using System.Collections.Generic;
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namespace Restriction
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{
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public class WhereClause2
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{
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//This sample uses the where clause to find all products that are out of stock using query syntax.
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//Outputs the following to Console
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//
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// Sold out products:
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// Chef Anton's Gumbo Mix is sold out!
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// Alice Mutton is sold out!
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// Thüringer Rostbratwurst s sold out!
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// Gorgonzola Telino is sold out!
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// Perth Pasties is sold out!
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public static void QuerySyntaxExample()
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{
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List<Product> products = Data.Products;
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var soldOutProducts =
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from prod in products
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where prod.UnitsInStock == 0
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select prod;
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Console.WriteLine("Sold out products:");
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foreach (var product in soldOutProducts)
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{
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Console.WriteLine("{0} is sold out!", product.ProductName);
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}
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}
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//This sample uses the where clause to find all products that are out of stock using query syntax.
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//Outputs the following to Console
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//
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// Sold out products:
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// Chef Anton's Gumbo Mix is sold out!
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// Alice Mutton is sold out!
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// Thüringer Rostbratwurst s sold out!
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// Gorgonzola Telino is sold out!
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// Perth Pasties is sold out!
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public static void MethodSyntaxExample()
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{
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List<Product> products = Data.Products;
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var soldOutProducts = products.Where(prod => prod.UnitsInStock == 0);
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Console.WriteLine("Sold out products:");
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foreach (var product in soldOutProducts)
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{
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Console.WriteLine("{0} is sold out!", product.ProductName);
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}
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}
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}
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}

‎samples/linq/csharp/restriction/Where-Sample-3.cs

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using System.Linq;
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using System;
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using System.Collections.Generic;
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namespace Restriction
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{
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public class WhereClause3
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{
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//This sample uses the where clause using query syntax to find all products that are in stock and cost
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//more than 50.00 per unit.
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//Outputs the following to Console
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//
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// In-stock products that cost more than 50.00:
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// Mishi Kobe Niku is in stock and costs more than 50.00.
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// Carnarvon Tigers is in stock and costs more than 50.00.
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// Sir Rodney's Marmalade is in stock and costs more than 50.00.
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// Côte de Blaye is in stock and costs more than 50.00.
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// Manjimup Dried Apples is in stock and costs more than 50.00.
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// Raclette Courdavault is in stock and costs more than 50.00.
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public static void QuerySyntaxExample()
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{
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List<Product> products = Data.Products;
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var expensiveInStockProducts =
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from prod in products
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where prod.UnitsInStock > 0 && prod.UnitPrice > 50.00M
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select prod;
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Console.WriteLine("In-stock products that cost more than 50.00:");
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foreach (var product in expensiveInStockProducts)
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{
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Console.WriteLine("{0} is in stock and costs more than 50.00.", product.ProductName);
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}
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}
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//This sample uses the where clause using method syntax to find all products that are in stock and cost
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//more than 50.00 per unit.
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//Outputs the following to Console
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//
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// In-stock products that cost more than 50.00:
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// Mishi Kobe Niku is in stock and costs more than 50.00.
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// Carnarvon Tigers is in stock and costs more than 50.00.
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// Sir Rodney's Marmalade is in stock and costs more than 50.00.
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// Côte de Blaye is in stock and costs more than 50.00.
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// Manjimup Dried Apples is in stock and costs more than 50.00.
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// Raclette Courdavault is in stock and costs more than 50.00.
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public static void MethodSyntaxExample()
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{
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List<Product> products = Data.Products;
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var expensiveInStockProducts = products.Where(prod=>prod.UnitsInStock > 0 && prod.UnitPrice > 50.00M);
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Console.WriteLine("In-stock products that cost more than 50.00:");
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foreach (var product in expensiveInStockProducts)
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{
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Console.WriteLine("{0} is in stock and costs more than 50.00.", product.ProductName);
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}
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}
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}
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}

‎samples/linq/csharp/restriction/Where-Sample-4.cs

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using System.Linq;
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using System;
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namespace Restriction
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{
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//This sample demonstrates an indexed where clause that returns digits whose name is
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//shorter than their value.
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//Outputs the following to Console
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//
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// Short digits:
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// The word five is shorter than its value.
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// The word six is shorter than its value.
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// The word seven is shorter than its value.
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// The word eight is shorter than its value.
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// The word nine is shorter than its value.
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public class WhereClause4
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{
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public static void Example()
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{
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string[] digits = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };
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var shortDigits = digits.Where((digit, index) => digit.Length < index);
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Console.WriteLine("Short digits:");
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foreach (var d in shortDigits)
25+
{
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Console.WriteLine("The word {0} is shorter than its value.", d);
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}
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}
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}
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}

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