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LINQ
Tagged Content List
Wiki Page:
Adding a new record to an IQueryable variable
Maheshkumar S Tiwari
Recently working on one of my application using Linq, I need to fill the datagridview with selected rows and columns which i can get from querying a list of objects using Linq. Now for every result i need to add an additional static record to the grid view. for this i need to have this record as a...
on
6 Sep 2013
Wiki Page:
Converting DataTable to a List of Entity Object
Maheshkumar S Tiwari
Recently some one asked me how should I need to convert a DataTable to an List of Entity Object. Let me Explain in detail below… Let say we have following Entity Class called Testimonial with two properties i.e.., Comment and Commentedby here Comment is the property where we have the actual comment...
on
6 Sep 2013
Wiki Page:
Baumstrukturen mit LINQ abfragen (de-DE)
Carsten Siemens
Dieser Artikel ist die deutsche Übersetzung meines zuerst auf Englisch erschienen Artikels How to Query Trees Using LINQ . (Gerichtete) Bäume gehören zu den häufigsten Datenstrukturen in der Informatik. Wie sie mit LINQ genutzt werden, ist aber weniger offensichtlich. Dieser Artikel definiert...
on
23 Aug 2013
Wiki Page:
How to Query Trees Using LINQ
Carsten Siemens
A (directed) tree is one of the most common data types. But how do you use trees in LINQ? This article introduces a generic LINQ-Extension which solves the problem, gives an example and discusses alternatives. Table of Contents Motivation Solution Usage Example Contradictions and alternatives...
on
20 Aug 2013
Wiki Page:
Cómo: Crear dinámicamente una base de datos (LINQ to SQL) (es-ES)
Ed Price - MSFT
Basado en este articulo El código siguiente proporciona un ejemplo de cómo se crearía una nueva base de datos denominada MyDVDs.mdf. public class MyDVDs : DataContext { public Table<DVD> DVDs; public MyDVDs( string connection) : base (connection) { } } [Table...
on
9 Jul 2013
Wiki Page:
Operaciones CRUD (Create, read, update and delete) con Linq (es-ES)
Ed Price - MSFT
Basado en este articulo En LINQ to SQL, las operaciones Insert, Update y Delete se realizan agregando, cambiando y quitando objetos en el modelo de objetos. De forma predeterminada, LINQ to SQL convierte estas acciones a SQL y envía los cambios a la base de datos. LINQ to SQL proporciona...
on
9 Jul 2013
Wiki Page:
Entity Framework FAQ: Querying
Carsten Siemens
Table of Contents General LINQ Questions How do I retrieve a single entity? How does "Include" work with multiple levels of branches? How do I query trees using LINQ? Entity Framework Related LINQ Questions Can I execute queries locally rather than at the database? Is data filtered on the database...
on
30 May 2013
Wiki Page:
Migrate a WCF Data Service to Windows Azure
Derrick VanArnam [MSFT]
Introduction At the end of this guide, you will create a Windows Azure WCF Data Service using Windows Azure Access Control Service claims-based authentication that connects to an Azure SQL Database. In addition, you will learn how to use a Windows Azure claims-based token to connect to a Windows...
on
18 Feb 2013
Wiki Page:
Paginação com Linq utilizando Skip e Take (pt-BR)
Rafael Zaccanini
Vamos imaginar que você possua apenas dois parâmetros de entrada, o indice da página atual e a quantidade de itens que você deseja exibir por página. Podemos fazer algo bem simples e limpo: int paginaAtual = 1; int itensPagina = 15; DataContext db = new DataContext...
on
15 Jul 2012
Wiki Page:
Linq to SQL - Adicionando validações (pt-BR)
Rafael Zaccanini
A Validação de Dados com Linq é na verdade uma verificação de que os valores inseridos nos objetos de dados estão em conformidade com a estrutura e esquema do objeto, além de prevenir e viabilizar a realização de validações...
on
15 Jul 2012
Wiki Page:
Linq to SQL - Utilizando Compiled Query (pt-BR)
Rafael Zaccanini
É muito comum em diversos sistemas a execução da mesma consulta diversas vezes por diversos usuários, porém, além de bastante improdutivo a repetição destas queries existe o fato da " perca " de desempenho em run-time. Isto devido ao fato...
on
15 Jul 2012
Wiki Page:
Linq to SQL - Escrevendo diretamente com SQL (pt-BR)
Rafael Zaccanini
Visando que o Linq to SQL faz parte do pacote de tecnologias ADO.NET e seus serviços são prestados pelo modelo do provedor ADO.NET, isto torna possível juntar Linq to SQL com ADO.NET. Um exemplo claro, é possível criar uma nova instância de um DataContext utilizando...
on
15 Jul 2012
Wiki Page:
Linq to SQL - Trabalhando com Stored Procedures complexas (pt-BR)
Rafael Zaccanini
Para este artigo vamos trabalhar com uma procedure bem mais complexa que a do artigo anterior, onde a mesma utilizará parâmetros de entrada, parâmetros de saída, tipos de retorno dinâmico e código de retorno. Criando a Stored Procedure Vamos criar a procedure...
on
15 Jul 2012
Wiki Page:
Linq to SQL - Trabalhando com Stored Procedures simples (pt-BR)
Rafael Zaccanini
Primeiramente vale ressaltar que, o funcionamento de procedures com o Linq to SQL é um tanto diferente e mais complexo do que com tabelas ou views, pois uma procedure pode possuir parametros de entrada, parametros de saída, retornos com tipos de dados diferentes de forma dinâmica...
on
15 Jul 2012
Wiki Page:
LINQ
Ed Price - MSFT
Note: This page is currently a stub article. Add information as you can.
on
26 Sep 2011
Wiki Page:
The Repository Pattern on LINQ
Suresh Mekkattil
What is the Repository Pattern? The repository pattern provides a way to provide isolation between the data access layer of your application with the business layer. In using the repository pattern, you can have a separation of concerns in your data access code. You can find more information here...
on
5 Aug 2011
Wiki Page:
LINQ To SharePoint – Passo-a-passo de como utilizá-lo em sua web part (pt-br)
Fabian André Gehrke
Table of Contents Introdução Geração do arquivo de código-fonte - SPMetal Utilização da Classe Gerada Considerações Finais Referências Introdução Os desenvolvedores sempre tiveram uma dificuldade na hora...
on
31 Jul 2011
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