1. Технологии доступа к данным на платформе Microsoft.NET
5/4/2019 2:57 PM
Технологии доступа к данным на платформе Microsoft.NET
На основе доклада Романа Здебского на семинаре «Дни разработчика»
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. Доступ к данным Содержание Существующие проблемы LINQ
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Содержание
Существующие проблемы
LINQ
ADO.NET Entity Framework
Доступ к данным
©2006 Microsoft Corporation. All rights reserved.
This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.

3. Краткая ретроспектива
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Краткая ретроспектива
ODBC (1.0 –1992) – низкоуровневый API
OLE DB – COM API
ADO – объектная модель - Recordset
ADO.NET – объектная модель .NET Dataset
MDAC (Windows DAC) -1996
Microsoft Jet Database Engine
DB-Library
Data Access Objects (DAO)
Remote Data Objects (RDO)
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

4. 5/4/2019 2:57 PM
Доступ к данным
DataSet DS=new DataSet();
XQueryNavigatorCollection oXQ = new XQueryNavigatorCollection();
string strXML = "";
string fileName1="c:\\Test\\T1.xml";
string alias1 = "MyDataTest.xml";
oXQ.AddNavigator( fileName1, alias1 );
string strQuery = "<NewDataSet> { " +
" let $bb := document(\"MyDataTest.xml\")/*/* " +
" let $cc := document(\"MyDatattt.xml\")/*/* " +
" for $c in $cc " +
" for $b in $bb " +
" where $c/kod = $b/kod " +
" return <Table> { $b/nazv,$b/dat,$c/naim } </Table> " +
" }</NewDataSet> “ ;
XQueryExpression xExpression = new XQueryExpression(strQuery);
strXML = xExpression.Execute(oXQ).ToXml();
StringReader strReader = new StringReader(strXML);
XmlTextReader reader = new XmlTextReader(strReader);
DS.ReadXml(reader);
DataGrid1.DataSource = DS.Tables[0];
DataGrid1.DataBind();
SqlConnection nwindConn = new SqlConnection("Data Source=localhost;Integrated Security=SSPI;Initial Catalog=northwind");
SqlCommand catCMD = nwindConn.CreateCommand();
catCMD.CommandText = "SELECT CategoryID, CategoryName FROM Categories WHERE CategoryName LIKE ‘B%’ ORDER BY 1“;
nwindConn.Open();
SqlDataReader myReader = catCMD.ExecuteReader();
while (myReader.Read()) {
Console.WriteLine("\t{0}\t{1}", myReader.GetInt32(0), myReader.GetString(1)); }
myReader.Close();
nwindConn.Close();
Dim xmldoc As New System.Xml.XPath.XPathDocument("c:\books.xml")
Dim nav As System.Xml.XPath.XPathNavigator = xmldoc.CreateNavigator()
Dim expr As System.Xml.XPath.XPathExpression = nav.Compile( "//Publisher[. = 'MSPress']/parent::node()/Title" )
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

5. Типовые уровни при работе с данными
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Типовые уровни при работе с данными
Концептуальный
Бизнес сущности и логика
Объекты и объектные коллекции
Логический
Реляционное представление
Таблицы, отношения
junction tables
Физический
физическое хранение и манипулирование
страницы, экстенты, индексы ограничения (constraints) …
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

6. Сложности в работе с данными
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Сложности в работе с данными
Проблема:
Data != Objects
Нетипизированные острова
разные для каждого источника
специфические знания для каждого источника
отсутствие проверок на этапе компиляции
сложность в поддержке …
… и даже нет IntelliSence 
Dataset – реляционное представление в объектном виде
Скрытые знания о структуре хранения и объектно–реляционном маппинге (ORM) в виде строк
Data Access Layer - спасение?
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

7. Решение – основные идеи
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Решение – основные идеи
LINQ
Типизированные запросы
Типизированные результаты
Объектное представление схемы хранения
Общее решение для целого ряда продуктов
Использование преимуществ ADO.NET
Создание концептуальной объектной модели
Явное декларативное представление схемы объектно–реляционного маппинга (ORM) между концептуальной моделью и моделью хранения
Entity Framework
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

8. Language Integrated Query
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Language Integrated Query
Единообразные типизированные запросы к любому источнику данных
Методы расширения интерфейса IEnumerable (Select, OrderBy, GroupBy, Join, Where)
Возвращаемый результат как объектная коллекция (IEnumerable<T>)
Intellisence, проверка на этапе компиляции
Специальный синтаксис выражений запросов
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

9. Local variable type inference
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C# 3.0
Query expressions
var contacts =
from c in customers
where c.State == "WA"
select new { c.Name, c.Phone };
Local variable type inference
Lambda expressions
var contacts =
customers
.Where(c => c.State == "WA")
.Select(c => new { c.Name, c.Phone });
Extension methods
Object initializers
Anonymous types
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

10. Local variable type inference
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VB 9
Query expressions
Dim contacts =
From c In customers _
Where c.State = "WA“ _
Select c.Name, c.Phone
Local variable type inference
Lambda expressions
Dim contacts = _
customers _
.Where(Function (c) c.State = "WA")_
.Select(Function(c) New With { c.Name, c.Phone })
Extension methods
Object initializers
Anonymous types
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

11. .NET Language Integrated Query
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Проект LINQ
C# 3.0
VB 9.0
Другие
.NET Language Integrated Query
LINQ to Objects
Объекты
LINQ to DataSets
LINQ to SQL
LINQ to Entities
LINQ to XML
<book>
<title/>
<author/>
<year/>
<price/>
</book>
XML
Реляционные источники
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

12. Демонстрация LINQ Краткий обзор 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. 5/4/2019 2:57 PM
LINQ текущий статус
Вышел (RTM) в ноябре 2007 года вместе с Visual Studio 2008 и .NET Framework 3.5
Поддерживает модель провайдеров, существуют реализации:
LINQ to NHibernate
LINQ to Amazon
SharePoint, ….
Развивается в направлении параллелизма –
PLINQ
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

14. Решение – основные идеи
5/4/2019 2:57 PM
Решение – основные идеи
LINQ
Типизированные запросы
Типизированные результаты
Объектное представление схемы хранения
Общее решение для целого ряда продуктов
Использование преимуществ ADO.NET
Создание концептуальной объектной модели
Явное декларативное представление схемы объектно–реляционного маппинга (ORM) между концептуальной моделью и моделью хранения
Entity Framework
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

15. 5/4/2019 2:57 PM
Entity Framework
Инфраструктура формирования концептуального объектного представления данных с помощью сущностей (Entities)
Реализация классических задач ORM
Абстрагирование от схемы хранения
Гибкий маппинг
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

16. Архитектура Entity Framework
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Архитектура Entity Framework
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

17. Гибкий маппинг Таблица на иерархию 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

18. Гибкий маппинг Таблица на тип 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

19. Гибкий маппинг Таблица на класс 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

20. Гибкий маппинг Разделение сущности 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

21. Гибкий маппинг Хранимые процедуры 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

22. Гибкий маппинг Хранимые процедуры 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

23. Гибкий маппинг Создание представлений (QueryView) 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

24. Гибкий маппинг Создание представлений (Defining Query)
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Гибкий маппинг
Создание представлений (Defining Query)
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

25. ADO.NET Entity Framework
5/4/2019 2:57 PM
ADO.NET Entity Framework
Демонстрация
Основные возможности
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

26. Entity Framework – текущий статус
5/4/2019 2:57 PM
Entity Framework – текущий статус
Доступен в составе .NET Framework SP1 Beta
Уже создан провайдер для Oracle
Провайдеры третьих производителей для различных баз данных
В течение 3 месяцев после выхода (RTM)
IBM DB2, MySQL, PostgreSQL, Informix, Ingres, Sybase, SQLite, SQL Anywhere, Progress …
В течение года
Firebird
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

27. 5/4/2019 2:57 PM
Роль Entity Framework
Единый движок концептуального представления и ORM для ряда ключевых продуктов Microsoft
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

28. Сравнивая LINQ и Entity Framework
5/4/2019 2:57 PM
Сравнивая LINQ и Entity Framework
LINQ
Единообразные запросы
Entity Framework
Гибкий маппинг
Основное назначение
Единообразные типизированные запросы к любому источнику
Типизированные результаты
LINQ to SQL -Типизированное представление логической схемы данных 1:1 ORM
LINQ to SQL – возможности переименований объектов данных и поддержка TPH
Создание концептуального объектного уровня, абстрагированного от логики хранения
Типизированное представление концептуальной схемы с гибким маппингом – полноценный ORM
Возможности маппинга
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

29. LINQ + Entity Framework
5/4/2019 2:57 PM
LINQ + Entity Framework
C# 3.0
VB 9.0
Другие
Реляционные источники
.NET Language Integrated Query
LINQ to Objects
LINQ to DataSets
LINQ to SQL
LINQ to Entities
LINQ to XML
Entity Framework
Объекты
Концептуальная
схема (CSDL)
<book>
<title/>
<author/>
<year/>
<price/>
</book>
XML
Маппинг (MSL)
Схема
хранения (CSDL)
ADO.NET
Microsoft SQL Server, Oracle, DB2, MySQL…
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

30. 5/4/2019 2:57 PM
Ссылки по теме
LINQ
ADO.NET Entity Framework
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

31. Спасибо за внимание! 5/4/2019 2:57 PM
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.