Use ToLookup to search object property : ToLookup « LINQ « C# / CSharp Tutorial

Home
C# / CSharp Tutorial
1.Language Basics
2.Data Type
3.Operator
4.Statement
5.String
6.struct
7.Class
8.Operator Overload
9.delegate
10.Attribute
11.Data Structure
12.Assembly
13.Date Time
14.Development
15.File Directory Stream
16.Preprocessing Directives
17.Regular Expression
18.Generic
19.Reflection
20.Thread
21.I18N Internationalization
22.LINQ
23.GUI Windows Forms
24.Windows Presentation Foundation
25.Windows Communication Foundation
26.Workflow
27.2D
28.Design Patterns
29.Windows
30.XML
31.XML LINQ
32.ADO.Net
33.Network
34.Directory Services
35.Security
36.unsafe
C# / C Sharp
C# / C Sharp by API
C# / CSharp Open Source
C# / CSharp Tutorial » LINQ » ToLookup 
22.24.4.Use ToLookup to search object property
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class Employee {
    public int birthYear;
    public string firstName;
    public string lastName;

    public static Employee[] GetEmployees() {
        Employee[] actors = new Employee[] {
       new Employee birthYear = 1964, firstName = "K", lastName = "R" },
       new Employee birthYear = 1968, firstName = "O", lastName = "W" },
       new Employee birthYear = 1960, firstName = "J", lastName = "S" },
       new Employee birthYear = 1964, firstName = "S", lastName = "B" },
    };

        return (actors);
    }
}
public class MainClass {
    public static void Main() {
        ILookup<int, Employee> lookup = Employee.GetEmployees().ToLookup(k => k.birthYear);
        IEnumerable<Employee> actors = lookup[1964];
        foreach (var actor in actors)
            Console.WriteLine("{0} {1}", actor.firstName, actor.lastName);
    }
}
22.24.ToLookup
22.24.1.ToLookup Demo
22.24.2.ToLookup with int and string
22.24.3.Call ILookUp returned from ToLookup to get the IEnumerable
22.24.4.Use ToLookup to search object property
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.