Query by Person's FirstName : Object Query « 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 » Object Query 
22.6.3.Query by Person's FirstName
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using System.Reflection;

class Person {
    int _id;
    int _idRole;
    string _lastName;
    string _firstName;

    public int ID {
        get return _id; }
        set _id = value; }
    }

    public int IDRole {
        get return _idRole; }
        set _idRole = value; }
    }

    public string LastName {
        get return _lastName; }
        set _lastName = value; }
    }

    public string FirstName {
        get return _firstName; }
        set _firstName = value; }
    }
}
class Program {
    static void Main(string[] args) {
        List<Person> people = new List<Person> {
               new Person ID = 1, IDRole = 1, LastName = "A", FirstName = "B"},
               new Person ID = 2, IDRole = 2, LastName = "G", FirstName = "T"},
               new Person ID = 3, IDRole = 2, LastName = "G", FirstName = "M"},
               new Person ID = 4, IDRole = 3, LastName = "C", FirstName = "G"}
            };

        var query = from p in people
                    where p.FirstName == "B"
                    select p;

    }
}
22.6.Object Query
22.6.1.Query an array of object by its property value
22.6.2.Select object in a List
22.6.3.Query by Person's FirstName
22.6.4.Query a list of objects by its 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.