LINQ به زبان ساده - نسخه قابل چاپ

کد:
Using type inference to assign the resulting value(s)



 

    



var =

    



Destination



Information source providing a set of item(s)

    



from in

    



Source



Expression specifying the selection criteria

    



where , distinct

    



.......



Control the ordering of the results

    



order by , [Ascending | Descending]

    



Order



Aggregate the source items

    



count([]), sum(), min(), max(), avg()

    



Aggregate



Shaping the output

    



select

    



Projection



 



شاید با حل یک مثال بهتر متوجه بشین



using System;



using System.Collections.Generic;



using System.Linq;



 



namespace LINQIntro



{



   class Customer



   {



      public string CustomerName { get; set; }



      public string ContactName { get; set; }



      public string City { get; set; }



      public override string ToString()



      {



         return this.CustomerName + ", " +



            this.ContactName + ", " + this.City;



      }



   }



 



   class Program



   {



      static void Main(string[] args)



      {



         Program.ShowCustomers();



      }



 



      public static void ShowCustomers()



      {



         // Build a list of customers using an object initializer



         List<Customer> customers = new List<Customer> {



            new Customer { CustomerName = "Alfreds Futterkiste",



               ContactName = "Maria Anders", City = "Berlin"},



            new Customer { CustomerName =



               "Ana Trujillo Emparedados y helados",



               ContactName = "Ana Trujillo",



               City = "México D.F."},



            new Customer { CustomerName =



               "Antonio Moreno Taquería",



               ContactName = "Antonio Moreno",



               City = "México D.F."},



            new Customer { CustomerName = "Around the Horn",



               ContactName = "Thomas Hardy",



               City = "London"},



            new Customer { CustomerName = "Berglunds snabbköp",



               ContactName = "Christina Berglund",



               City = "Luleå"}};



 



          // Query the list of customers and select whatever



          // comes back



         var customer =



            from c in customers



            where c.City != "Berlin"



            orderby c.ContactName



            select c;



 



         // Display the selected records to the console



         foreach (var row in customer)



         {



            Console.WriteLine(row);



         }



         Console.ReadLine();



      }



   }



}