C# Anonymous Methods & The Action Object

Matthew is really great :-)

C# Anonymous Methods & The Action Object

Introduction to Functional Programming in C#.

Very Nice article from Matthew Cochran.

Introduction to Functional Programming in C#.

List<T>.foreach

Here is a sample code on how to use 'foreach' on 'generic list'
Notice the call to the anonymous function

 class Employee 
 {
  private string _nom;
  private double  _salary;
  
  public Employee()
  {   
  }
  
  public Employee(string nom, double salary ) 
  {
   _nom = nom;
   _salary = salary;

  }
  
  public string Nom 
  {
   get {return _nom; }
   set { _nom = value;}
   
  }
  
  public double Salary 
  {
   get { return _salary;}
   set { _salary = value; }
  }
 }
 
 
 
 class Program
 {
 
  public static void incSalary(Employee p)
  {
   p.Salary += 100;
   Console.WriteLine(p.Nom + Convert.ToString(p.Salary));
  }
   
  public static void Main(string[] args)
  {
   List lstEmployee = new List();
   
   lstEmployee.Add(new Employee("Paul",3300));
   lstEmployee.Add(new Employee("Raphael",2500));
  
   lstEmployee.ForEach(incSalary);
   
   lstEmployee.ForEach(delegate(Employee p){Console.WriteLine(p.Nom);});
   
   Console.Write("Press any key to continue . . . ");
   Console.ReadKey(true);
  }
 }
}

LINQ - Accés aux données

Great article from Julien Corioland

Visual Studio 2008 : Les nouveautés de l’accès aux données avec LINQ !

LINQ - C#

This article explains compares
Lazy Loading et Agressive Loading
(in French)

Lazy Loading et Agressive Loading

LINQ - Select using Class

Beth Massi shows a way to project select data in class instances
Here the c# equivalent

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace FileSystem
{
    public partial class Form1 : Form
    {
        class MyFile
        {
            private System.DateTime _creationTime;
            private string _name;

            public System.DateTime CreationTime
            {
                get {return _creationTime;}
                set { _creationTime = value; }
            }

            public string Name
            {
                get { return _name; }
                set { _name = value; }
            }
        }

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DirectoryInfo root = new DirectoryInfo(".");

            var myFiles = from FileInfo f in root.GetFiles()
                          select new MyFile { Name = f.Name, 
                                              CreationTime = f.CreationTime 
                                            };

            dataGridView1.DataSource = myFiles.ToList();
            
        }
    }
}

FileSystem in C#

Here is a way to retrieve file info in C#
using LINQ syntax.
Feel free to comment.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace FileSystem
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DirectoryInfo root = new DirectoryInfo(".");
            var files = from FileInfo f in root.GetFiles()
                        select new { FileName = f.Name, LengthFile = f.Length };


            dataGridView1.DataSource = files.ToList();
            
        }
    }
}

LINQ - Operators

Here is the main list of LINQ operators
Thanks >Kader Yildirim

Restriction operators
  Where

Projection operators
  Select
  SelectMany

Partitioning operators
  Take
  Skip
  TakeWhile
  SkipWhile

Ordering operators
  OrderBy
  OrderByDescending
  ThenBy
  ThenByDescending
  Reverse

Grouping operators
  GroupBy
  Joining operators
  Join
  GroupJoin

Set operators
  Distinct
  Union
  Intersect
  Except

Conversion operators
  Cast
  ToArray
  ToList
  ToDictionary
  OfType
  ToLookup
  ToSequence

Element operators
  DefaultEmpty
  First
  FirstOrDefault
  Last
  LastOrDefault
  ElementAt
  ElementAtOrDefault
  Single
  SingleOrDefault

Generation operators
  Empty
  Range
  Repeat
  Quantifiers
  Any
  All
  Contains

Aggregate operators
  Aggregate
  Count
  LongCount
  Sum
  Min
  Max
  Average
  Fold

Miscellaneous operators
  Concat
  EqualAll
  Custom Sequence operators
  Combine
  Query Execution
  Deferred
  Immediate
  QueryReuse

LINQ - Articles in french

Some french articles using LINQ

LINQ à 360 degré

Functional programming - C#

Here is a series of articles concerning functional in C#

A C# library to write functional code