1 (LINQ) Microsoft Visual Studio 2008 Microsoft

rzdebski@microsoft.com http://blogs.msdn.com/roman 2 LINQ? LINQ LINQ .NET

3:Data != Objects4 T/SQL

Oracle SQL*Plus

USE NorthwindSELECT ProductName,UnitPrice, UnitsInStockFROM productsWHERE productID p.ProductName== "Chai"); product.UnitsInStock = 11; product.ReorderLevel = 10; product.UnitsOnOrder = 2; db.SubmitChanges();Delete var supplier = db.Suppliers.FirstOrDefault(s=>s.CompanyName == ABC"); if ((supplier != null) && (supplier.Products.Count == 0)) { db.Suppliers.Remove(supplier); db.SubmitChanges(); } NorthwindDataContext db = new NorthwindDataContext(); Supplier supplier = new Supplier{CompanyName = ABC}; db.Suppliers.Add(supplier); db.SubmitChanges();

Add4546LINQ to Objects C# VB

SQL- .NET collection ( IEnumerable)

LINQ DataBinding47LINQ XML XML XmlDocument doc = new XmlDocument();XmlElement contacts = doc.CreateElement("contacts");foreach (Customer c in customers) if (c.Country == "USA") { XmlElement e = doc.CreateElement("contact"); XmlElement name = doc.CreateElement("name"); name.InnerText = c.CompanyName; e.AppendChild(name); XmlElement phone = doc.CreateElement("phone"); phone.InnerText = c.Phone; e.AppendChild(phone); contacts.AppendChild(e); }doc.AppendChild(contacts);

Great Lakes Food (503) 555-7123

ImperativemodelDocumentcentricNo integrated queriesMemory intensive48XDocument loaded = XDocument.Load(@"C:\contacts.xml");contacts var q = from c in loaded.Descendants("contact") where (int)c.Attribute("contactId") < 4 select (string)c.Element("firstName") + + (string)c.Element("lastName");LINQ to XML XML LINQXElement contacts = new XElement("contacts", from c in customers where c.Country == "USA" select new XElement("contact", new XElement("name", c.CompanyName), new XElement("phone", c.Phone) ));Declarative modelElementcentricIntegrated queriesSmaller and faster49LINQ To XMLLanguage integrated query XML XPath / XQuery C# VB DOMElement centric, document centric 50LINQ to XML objects

5152Parallel Language Integrated Query (PLINQ) ParallelFXLINQ to ObjectsLINQ to XML LINQ to SQL SQL Server:Reference System.Concurrency.dllWrap your data source in an IParallelEnumerable with a call to the System.Linq.ParallelEnumerable.AsParallel extension method.

53Parallel Language Integrated Query (PLINQ) :pipelined processingstop-and-go processinginverted enumeration

IEnumerable leftData = ..., rightData = ...; var q = from x in leftData.AsParallel() join y in rightData on x.a == y.b select f(x, y); 54LINQ Language Integrated Query .NET C# 3.0 VB 9.0

LINQ to ObjectsSQL-like .NET

LINQ to SQL LINQ to XML, XML DOM LINQ to EntitiesLINQ to Datasets55LINQ , XML SQL XQuery C# VB , IntelliSense, refactoring APIs56Third-Party LINQ Providers LINQ to WebQueries (MSDN Web sites)LINQ to Amazon (books search)LINQ to RDF Files. LINQ to MySQL LINQ to NHibernate LINQ to LDAP LINQ to Google Desktop LINQ to SharePoint LINQ to Streams (SLinq, Streaming LINQ) LINQ to Expressions (MetaLinq) 57 paging LINQ?58 LINQ microsoft.com The LINQ Project

Anders HejlsbergChief Designer of C#Architect of LINQ project

59 T/SQL? LINQ ,

60 (LINQ) Microsoft Visual Studio 2008 Microsoft

rzdebski@microsoft.comhttp://blogs.msdn.com/roman 14:00 15:0061

62

63XAttribute

XNode

XComment

XContainer

XDeclaration

XDocument

XDocumentType

XElement

XName

XProcessingInstruction

XText

XNamespace

XStreamingElement