framework-35 « WordPress.com Tag Feed

Lamda Expressions und Expression Trees mit VB.Net

webjagger — Mon, 14 Sep 2009 11:57:49 +0000

Also ich hab’s ja nicht so sehr damit, aber die folgenden Links haben mir zumindest nicht zuletzt anhand der Beispiele weitergeholfen, etwas in die Materie einzutauchen:

Also das könnte in VB.Net dann z.B. wie folgt aussehen:
query = query.Where(Function(c)c.ContactFirstname.Contains("Blacklisted"))

Und das ist mein Beispiel, damit ich’s auch mal hingekriegt habe:
Public Class xxx


    Private m_xId As Short

    Public ReadOnly Property xId() As Short

        Get

            Return m_xId

        End Get

    End Property
    Private m_xGroupNr As Integer

    Public ReadOnly Property xGroupNr() As Integer

        Get

            Return m_xGroupNr

        End Get

    End Property
    Private m_xBetrag As Decimal

    Public ReadOnly Property xBetrag() As Decimal

        Get

            Return m_xBetrag

        End Get

    End Property
    Public Sub New( _

     ByVal _xId As Short _

     , ByVal _xGroupNr As Integer _

     , ByVal _xBetrag As Double _

    )

        MyBase.new()

        m_xId = _xId

        m_xGroupNr = _xGroupNr

        m_xBetrag = _xBetrag

    End Sub
End Class
...

            Dim xxxList As New List(Of xxx)

            xxxList.Add(New xxx(1, 10, 100))

            xxxList.Add(New xxx(2, 10, 200))

            xxxList.Add(New xxx(3, 20, 400))

            xxxList.Add(New xxx(4, 20, 500))
            Dim xQuery = From x In xxxList _

                         Select x
            Dim xQueryG = From x In xxxList _

                          Group x By x.xGroupNr _

                          Into Group _

                          Select _

                          xGroupNr _

                          , BetragSum = Group.Sum(Function(x) x.xBetrag)
            Dim xQueryG2 = From x In xxxList _

                          Group x By x.xGroupNr _

                          Into Group _

                          Select _

                          New xxx( _

                            _xId:=0 _

                            , _xGroupNr:=xGroupNr _

                            , _xBetrag:=Group.Sum(Function(x) x.xBetrag) _

                            )

101 LINQ Samples + LINQPad

webjagger — Tue, 01 Sep 2009 06:16:50 +0000

Eine ganz anschauliche Sammlung an LINQ-Beispielen gibt’s unter 101 LINQ Samples
Und wer noch etwas Toolunterstützung braucht, kann dann noch LINQPad verwenden.

Eigene Assembly in "Add Reference" Dialog von Visual Studio 2010

webjagger — Mon, 13 Jul 2009 12:30:44 +0000

Ich habe versucht eine eigene Assembly, die sich nachweislich – hab’s mit gacutil überprüft – im Global Assembly Cache (GAC) befand in den “Add Reference” Dialog von Visual Studio 2010 zu kriegen. Ich hab einiges ausprobiert und bin zu dem Schluss gekommen: Vergiss den GAC, für Visual Studio zählt nur das, was in der Registry steht.
Entscheidend sind folgende beide Einträge:

[HKEY_CURRENT_USER\SOFTWARE\Microsoft\.NETFramework\AssemblyFolders\MyAssemblies]@="C:\MyAssemblies"

bzw.

[HKEY_CURRENT_MACHINE\SOFTWARE\Microsoft\.NETFramework\AssemblyFolders\MyAssemblies]@="C:\MyAssemblies"

Wobei ersterer nur für den angemeldeten Benutzer gilt, der zweite für alle Benutzer.
Das hat dann funktioniert – übrigens auch in den Vorgängerversionen.

C# oder Visual Basic? Die richtige Programmiersprache für .NET-Entwickler

webjagger — Tue, 30 Jun 2009 05:18:44 +0000

Der Artikel auf heise developer sollte vor allem die “Halbgötter unter den Programmierern” wieder auf den Boden der Tatsachen zurückholen.
Aber im Ernst – es ist doch beruhigend zu wissen, dass die Sprachwahl im .Net Framework keine Vor-/Nachteile mit sich bringt und dass das auch so bleiben soll.

Aktion "I'm a VB" gestartet

webjagger — Mon, 29 Jun 2009 08:19:19 +0000

Ein neues Blog, in dem VB-Entwickler ihre Geschichte/Erfahrung veröffentlichen können.
http://blogs.msdn.com/vbteam/archive/2009/06/26/i-m-a-vb.aspx

LINQ to SQL Debug Visualizer

webjagger — Tue, 02 Jun 2009 12:54:06 +0000

Leider gibt’s im Visual Studio 2008 keine bereits eingebaute Möglichkeit, das durch LINQ to SQL generiert TSQL anzuschauen.
Wem der Umweg über den SQL Server Profiler zu aufwendig ist, der findet im LINQ to SQL Debug Visualizer vielleicht die Lösung.
Mehr Info gibt in Scott Guthrie’s Blog und dort gibt’s auch den Download.
Irgendwo im ZIP-File gibt’s dann auch die DLL, die man dann ins Verzeichnis c:\Programme\Microsoft Visual Studio 9.0\Common7\Packages\Debugger\Visualizers\ kopiert. Visual Studio neu starten und fertig ist die Laube.

LINQ: LEFT OUTER JOIN

webjagger — Fri, 29 May 2009 07:39:06 +0000

Muss das wirklich so grausam aussehen? So sahen jedenfalls die Beispiele aus, die ich gefunden habe:

Dim oDatenPlan = From oMon In listMonate _
Group Join oUppUp In dcUpp.tUppUmsatzPlans On oMon Equals oUppUp.Monat _
Into gVorlage = Group _
From oUppUp In gVorlage.DefaultIfEmpty() _
Where If(oUppUp Is Nothing, -1, oUppUp.FkFilialId) = oFiliale.FilialId _
And If(oUppUp Is Nothing, -1, oUppUp.FkAbtId) = abtId _
Select oMon

Microsoft Chart Controls - Problem beim Deployment

webjagger — Fri, 17 Apr 2009 09:10:23 +0000

Wollte das erste WebProjekt mit Microsoft Chart Controls for Microsoft .NET Framework 3.5 veröffentlichen und lief prompt auf ein Problemchen.
Die Komponente braucht ein Verzeichnis für temporäre Dateien. In der web.config steht daher standardmäßig folgender Eintrag:
<add key="ChartImageHandler" value="storage=file;timeout=20;dir=c:\TempImageFiles\;" />

Leider fehlte das Verzeichnis auf dem Produktivserver. Darum hab ich’s per URL auf ein Verzeichnis innerhalb des Projektverzeichnisses abgeändert, das ich beim Deployment mit anlege. Sieht dann so aus:
<add key="ChartImageHandler" value="storage=file;timeout=20;url=~\Reports\;"/>

Microsoft Chart Controls for Microsoft .NET Framework 3.5

webjagger — Tue, 14 Apr 2009 07:09:57 +0000

Im Artikel Charting With ASP.NET And LINQ im MSDN Magazine (Ausgabe März 2009) stolperte ich zufällig über eine – da lacht das Schwabenherz wieder einmal und ich hoffe, ich habe in der ersten Euphorie nichts übersehen – kostenlose Chart-Komponente von MS, die ich bis dato noch gar nicht kannte und die aber sehr vielversprechend anmutet. Bisher verwendete ich meist ChartFX, das allerdings kostenpflichtig ist.
Auch in der englischen April Ausgabe ist die Komponente in der Toolbox erwähnt
Links:

Control Win+Web: Download Microsoft Chart Controls for Microsoft .NET Framework 3.5
Visual Studio Integration: Download Microsoft Chart Controls Add-on for Microsoft Visual Studio 2008
Jeweils eine downloadbare super Sample Anwendung für Web und Win.
Chart Controls for .Net Framework Forum

Also ich hab mal einen kurzen Blick auf die Web-Geschichte geworfen, aber das Teil sieht mal nicht schlecht aus und integriert sich auch prima in den Designer.

Links Interessantes

Ronie Dias — Fri, 03 Apr 2009 04:00:12 +0000

Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1: BETA

Para quem quiser desenvolver aplicações para Windows Seven, é necessário instalar o Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1: BETA, que provê documentação, exemplos, arquivos de referência, bibliotecas e ferramentas (incluindo compiladores c#) ou seja, tudo que você precisa para desenvolver aplicações que rodem no Windows Seven BETA utilizando o Framework 3.5 SP1.

Lembrando que o SDK é apenas para as versões 2008 do Visual Studio.

Link: Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1: BETA

ASP.NET MVC

O ASP.NET MVC provê um Framework que possibilita a fácil implementação do padrão Model View Controller (MVC) para aplicações Web.

Download em: ASP.NET MVC

Mais informações:

Microsoft SQL Server 2008 Feature Pack

O Feature Pack é uma coleção de pacotes de instalação autônoma que agregam valor ao SQL Server 2008. Ele inclui as últimas versões de:

Componentes redistribuíveis para SQL Server 2008.
Provedores complementares para SQL Server 2008.
Componentes de compatibilidade com versões anteriores para SQL Server 2008.

Download disponível em: Microsoft SQL Server 2008 Feature Pack

جایی که دات نت نوشتیم!

امیر حمیدی — Mon, 06 Oct 2008 13:59:10 +0000

تو این پست قصد دارم نسخه جدید محیط برنامه نویسی ویژوال استدیو 2008 مایکروسافت رو براتون معرفی کنم. به هر حال برای ما ها که با تکنولوژی مایکروسافت آمیخته شدیم بیشتر دونستن از محصولات و ابزارهای اون خالی از لطف نیست. قبل از هر چیزی بگم که این نسخه 2008 واقعا یک نسخه ایده آۀ و رویایی به شمار می ره، البته این رو تجربه من موقع اجرای یک پروژه ASP.NET ثابت کرد. به طور کل VS2008 رو نه با نسخه های قبلی خود VS و نه با هیچ IDE دیگه نمیشه مقایسه کرد. در واقع من این Platform رو به جرات سالار می نامم!

مایکروسافت در این نسخه جدید ترین تکنولوژی خود یعنی dot net Framework 3.5 رو به کار برده. از مهمترین ویژگی های این نسخه می شه به قابلیت تولید نرم افزارهای تحت ویستا نیز اشاره کرد. گفته می شه 250 ویژگی جدید و منحصر بفرد در این نسخه وجود داره.

اگر براتون اتفاق بیفته که یک وب سایت رو با این ابزار برنامه نویسی کنید عملا آسودگی خاطر و سرعت عمل رو مشاهده خواهید کرد. یکی از ویژگی های جالب توجه LINQ می باشد، LINQ در واقع زبان پرس و جوی پیوسته (Language Intergrated Query) هست. این یعنی به قدری دست و بال برنامه نویس باز می شه که فقط کافیه بگه از دیتا بیس چی می خواد، دیگه لازم نیست بشینه وسطرها کد رو بنویسه. مایکروسافت گفته که می خواد این تکنولوژی رو کم کم نهادینه کنه.

یکی از ویژگی های بسیار بارز این نسخه تفزوده شدن امکان برنامه نویسی ساده AJAX هستش. به این ترتیب که شما تمام ابزار مورد نیاز برای استفاده از تکولوژی AJAX رو در toolbox در اختیار دارید و دیگه لازم نیست سطرها برنامه نویسی برای این انجام بدید.

همچنین به طرز جالبی خطایابی و ارائه پیشنهاد برای اصلاح خطا توسعه و تکمیل یافته. کلا از نظر ویژوال و ظاهری هم تفاوت های با نسخه قبل احساس می شه بعلاوه اینکه امنیت و سرعت هم دو فاکتور اساسی مطرح و توسعه یافته تو این نسخه هستند.

قیمت پایه برای کسانی که تازه از این نسخه خرید می کنند 799 دلار آمریکا و برای کسانی که از نسخه قبل ارتقا می دهند 549 دلاراست. البته چند نسخه جانبی از جمله ، نسخه Express و Team هم وجود دارند که ویژگیها و قیمت های مختلفی دارند.

Definições framework .NET

tomazeli — Fri, 03 Oct 2008 19:04:13 +0000

Olá pessoal hoje trarei algumas definições do framework .NET que muitas vezes iniciantes tem muita dificuldades em entender. Vamos lá:

Classe (class): Conjunto de caracteristicas e ações.
Método (method): Comportamentos ou ações.
Eventos (events): Ações que deverão ser controladas pelos métodos.
Objeto (object): Uma classe quando estanciada e fornecida atributos.
Propiedades (properties): Servirão para manipular as caracteristicas (atributos)

Por tanto se imaginarmos que temos uma classe chamada Pessoa com caracteristicas(atributos) que serão nome, email, idade e etc e os métodos (ações) dessa classe seriam andar, falar e etc.

Um abraço e até a próxima…

Lineker Tomazeli

Framework .NET novidades e como funciona...

tomazeli — Mon, 29 Sep 2008 22:05:25 +0000

Olá pessoal, depois de uma temporada sem post estamos de volta com uma serie de dicas sobre a tecnologia .NET da Microsoft.
Peço desculpas por ter estado ausente mas acreditem, foram por forças maiores.

Mas vamos lá, hoje explicarei um pouquinho de como funciona a linguagem interpretada e sua vantagens.

Para começar vamos entender alguns conceitos:
- A familia .NET esta toda baseada na CLS ( Common Language Specification ) que são as regras que se deve seguir para que o interpretador possa interpretar o seu codigo para liguagem de maquina ( binary code ou native code ) e assim a máquina possa fazer o que voçê solicitou.

Vamos analizar o diagrama:

Por tanto você escreve seu codigo e compila ele com o seu respectivo compilador e voçê terá como resultado o MSIL code ( Microsoft Intermediare Language ou Assembly ) que nada mais é seu .exe se for winforms ou .dll se for webforms e assim quando for a hora ele sera interpretado e passado para binary code ( codigo que utiliza somente 1 e 0. ex: 00110101)

Mas dai vem a pergunta mas qual a diferença da linguagem compilada?
Bom uma das grandes desvantagens das liguagens compiladas é que se você faz seu programa e compila no seu computador que é um pentium 3 e então você troca seu pentium 3 por um duo core achando que o processamento será mais rápido, você se engana, pois ele terá o mesmo desempenho que o pentium 3, pois o codigo foi compilado para aquele hardware. Já a linguagem interpretada, como ela é compilada na hora da execução, ela é compilada para o hardware do momento podendo utilizar todo o recurso disponível.

Outras novidades e dicas do framework são:

Garbage Collection : É um mecanismo que já vem por default no framework que fica checando para ver senão existem variáveis que não estão sendo utilizadas na memória e as retira para economizar recursos.
Namespaces: Nada mais é do que um agrupador lógico de classes.
Multithread: Você pode iniciar multiplos processos ao mesmo tempo. Veremos isso num proximo post.

Bom gente espero que tenha esclarecido um pouco este assunto.

Lineker Tomazeli

Categorias do Technorati .NET, Dev

Dot Net EBOOK FREE Download

mongther4 — Fri, 19 Sep 2008 15:14:44 +0000

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Building Websites with VB.NET and DotNetNuke 4

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Professional ADO.NET 2: Programming with SQL Server 2005 Oracle and MySQL

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Advanced ASP.NET AJAX Server Controls For .NET Framework 3.5

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Practical Software Factories in .NET

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Building Solutions with the Microsoft .NET Compact Framework

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Applied Microsoft .NET Framework Programming in Microsoft Visual Basic .NET

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Microsoft .NET XML Web Services

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Developing Applications with Visual Studio.NET

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Event-Based Programming: Taking Events to the Limit

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Languages like C#, VB .NET, and Delphi include built-in support for events, and these events become very powerful when they connect the objects and components of a system.

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.NET Domain-Driven Design with C#

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ASP.Net 3.5 Sample Application of LINQ, WFC, JSON and AJAX

pythonyan — Tue, 09 Sep 2008 07:23:33 +0000

DA CodeProject un articolo su alcune nuove funzionalità del framework 3.5 di casa Microsoft.

Descarga de componentes .NET

Alex — Wed, 06 Aug 2008 21:41:48 +0000

Microsoft Visual Studio 2008 Service Pack 1 Beta

Con este SP obtenemos las siguientes mejoras y características:

· .NET Framework Client Release (“Arrowhead”)

· ASP.NET Dynamic Data

· ASP.NET Routing

· ADO.NET Data Services

· ADO.NET Entity Framework

http://www.microsoft.com/downloads/details.aspx?familyid=CF99C752-1391-4BC3-BABC-86BC0B9E8E5A&displaylang=en

Visual Studio 2008 Training Kit

Con este kit de entrenamiento podremos aprender y mejorar nuestras habilidades en las siguientes etnologías del .NET framework :

LINQ
C# 3.0
Visual Basic 9
WCF
WF
WPF
ASP.NET AJAX
VSTO
Cardspace
Silverlight
Mobile
Application Lifecycle Management

Training Kit de Visual Studio 2008 y .NET Framework 3.5.

.NET 3.5 Enhancements Training Kit

El siguiente contiene el Kit de entrenamiento correspondiente a las nuevas adiciones que trae el SP1 de .NET 3.5 y cubre los siguientes aspectos:

1)      ADO.NET Data Services
2)      ADO.NET Entity Framework
3)      ASP.NET AJAX History
4)      ASP.NET Dynamic Data
5)      ASP.NET MVC
6)      ASP.NET Silverlight controls

http://go.microsoft.com/?linkid=7602397.

Microsoft ASP.NET 2.0 AJAX Extensions 1.0

Provee el framework que nos permite desarrollar aplicaciones con AJAX

Microsoft ASP .Net 2.0 AJAX Extensions 1.0

ASP.NET 3.5 Extensions Preview

Provee las nuevas funcionalidades agregadas recientemente a ASP.NET 3.5 y a ADO.NET.

El mismo incluye agrega las siguientes características:

ASP.NET MVC
ASP.NET Dynamic Data
Controles Silverlight para ASP.NET
ADO.NET Data Services
Entity Framework runtime
Nuevas características para ASP.NET AJAX

http://www.microsoft.com/downloads/details.aspx?FamilyId=A9C6BC06-B894-4B11-8300-35BD2F8FC908&displaylang=en

Microsoft Silverlight Tools Beta 2 para Visual Studio 2008

Este paquete es un complemento que pone a su disposición herramientas para Microsoft Silverlight 2 Beta 2. Se puede instalar sobre Visual Studio 2008 RTM o Visual Studio2008 Service Pack Beta y proporciona un sistema de proyectos de Silverlight para desarrollar aplicaciones de Silverlight usando C# o Visual Basic.

Con el paquete se instalaran los siguientes componentes:

· Silverlight 2 Beta 2

· SDK de Silverlight 2 Beta 2

· KB950630 para Visual Studio 2008 RTM o KB950632 para Visual Studio 2008 SP Beta

· Silverlight Tools Beta 2 para Visual Studio 2008

Con la instalación obtenemos lo siguiente:

· Plantillas de proyecto de Visual Basic y C#

· IntelliSense y generadores de código para XAML

· Depuración de aplicaciones de Silverlight

· Compatibilidad con referencias web

· Plantillas de WCF

· Compatibilidad con Team Build y con sintaxis de línea de comandos

· Integración con Expression Blend

· Instalación simplificada

Visual Studio 2008 and .NET Framework 3.5 Service Pack 1 Beta

kostland — Sun, 22 Jun 2008 05:39:57 +0000

There is no doubt that VS 2008 and .NET 3.5 totally rocks! ScottGu’s division keeps pushing t

Kit de capacitación de mejoras de NET 3.5

Gerardo — Thu, 29 May 2008 21:12:43 +0000

Buenas!!! El Kit de capacitación de mejoras de .NET 3.5 comprende las tecnologías de la versión .NET

Algumas coisas legais do Visual Basic .Net 9.0 - 2008

aletarifa — Sat, 17 May 2008 15:50:21 +0000

Vem ai mais uma versão do Visual Basic! Junto com a nova versão do Framework, a versão 3.5 temos algumas implementações interessantes em uma das linguagens mais utilizadas do mundo.

Um pouco de história

O Visual Basic foi totalmente refeito com o lançamento da plataforma .Net, e desde então continuou evoluindo junto com o Framework. Atrelado a versão 1.1 do Framework tínhamos o VB 7, e com a versão 2.0 ou VB 8 ou Visual Basic 2005.

A evolução do Framework é significativa, já que em 2002 tivemos o lançamento da versão 1.0 e apenas 5 anos depois já estamos na versão 3.5.

Veja a tabela desta evolução:

	2002	2003	2005	2006	2008
Visual Studio	VS 2002	VS 2003	VS 2005	VS 2005 + Add In	VS 2008 ^beta
Linguagens	VB 7.0 C# 1.0	VB 7.1 C# 1.1	VB 8.0 C# 2.0	VB 8.0 C# 2.0	VB 9.0 C# 3.0
Framework	1.0	1.1	2.0	3.0	3.5
CLR	1.0	1.1	2.0	2.0	2.0

Podemos acompanhar também a evolução da linguagem depois da Plataforma .Net:

Acompanhando as discussões em blogs do time de VB (http://blogs.msdn.com/vbteam) podemos reparar nos seguintes objetivos:

· Simplificar ainda mais o código;

· Não ignorar as versões anteriores;

· Tornar a linguagem funcional e extensível;

· Não revolucionar nada.

Inicializadores de Objetos

A inicialização de objetos esta presente há muito tempo na linguagem, e parece ser algo inofensivo, algo totalmente sem segredo… se analisarmos um código muito simples, realmente isso é verdade!

Dim cli As New Cliente

Como disse, sem segredo algum… mas vamos dar uma olhada em um código onde configuramos a propriedade de alguns clientes e adicionando em uma lista de clientes:

Dim lista As New List(Of Cliente)

Dim cli1 As New Cliente

cli1.Nome = “Cliente 1″

cli1.Idade = 28

lista.Add(cli1)

Dim cli2 As New Cliente

cli2.Nome = “Cliente 2″

cli2.Idade = 28

lista.Add(cli2)

Dim cli3 As New Cliente

cli3.Nome = “Cliente 3″

cli3.Idade = 28

lista.Add(cli3)

Dim cli4 As New Cliente

cli4.Nome = “Cliente 4″

cli4.Idade = 28

lista.Add(cli4)

Dim cli5 As New Cliente

cli5.Nome = “Cliente 5″

cli5.Idade = 28

lista.Add(cli5)

A idéia dos inicializadores de objetos, é através do With (não é o velho With J ) fazer a inicialização de objetos.

Dim cli As New Cliente With {.Nome = “Cliente 1″, .Idade = 10}

Neste caso então, o With na seqüência da instância do objeto já disponibiliza as propriedades e já é possível passar os valores.

Se compilarmos o código e decompilar o código, veja o que ocorre (utilizando o reflector – http://www.aisto.com/roeder/dotnet)

Dim  VB$t_ref$S0 As New Cliente    
    VB$t_ref$S0.Nome   = “Cliente 1″
    VB$t_ref$S0.Idade  = 10

Veja que o compilador criou uma variável com um nome estranho e atribuiu os valores da mesma forma que fizemos anteriormente. Ou seja, o código gerado após compilar é idêntico ao que criamos.

O código completo ficaria assim:

Dim lista As New List(Of Cliente)

lista.Add(New Cliente With {.Nome = “Cliente 1″, .Idade = 10})

lista.Add(New Cliente With {.Nome = “Cliente 2″, .Idade = 20})

lista.Add(New Cliente With {.Nome = “Cliente 3″, .Idade = 30})

lista.Add(New Cliente With {.Nome = “Cliente 4″, .Idade = 12})

lista.Add(New Cliente With {.Nome = “Cliente 5″, .Idade = 14})

Inferência de tipos

As linguagens .Net são fortemente tipadas… isso já é fato desde a versão 1.0 do framework. Porém agora, também temos a inferência do compilador na decisão de qual tipo iremos utilizar… não entenda isso como… deixamos de ser fortemente tipados!

Normalmente trabalhamos assim:

Dim nome As String = “Valor String”

Dim idade As Integer = 10

Mas agora podemos deixar que o compilador decida por nós J

O código:

Dim nome = “Valor String”

Dim idade = 10

Vamos decompilar e:

Public Shared Sub Main()   
  Dim nome As String = “Valor String”
  Dim idade As Integer = 10

A mesma coisa J

Métodos de extensão

Podemos também a partir de agora, criar um método de extensão a alguma classe já existente… por exemplo: podemos adicionar um método na classe String, sem herdar a classe ou sobrescrever algo já existente.

Exemplo:

<System.Runtime.CompilerServices.Extension()> _

Public Sub Exibir(ByVal s As String)

Console.WriteLine(s)

End Sub

Veja que adicionamos um atributo no médoto (obrigatório) e um parâmetro do tipo string.

Agora, se tivermos uma string:

Dim a As String = “Alexandre”

Podemos chamar o método criado anteriormente:

a.Exibir()

Então, é assumido que o parâmetro do método de extensão é o valor atribuído a variável.

Linq

Para quem trabalha com coleções, uma das tarefas mais chatas está associado a navegação trabalhosa entre os itens da lista… ou então, um excesso de carrega, descarrega pra cima e para baixo que acontece durante a execução. O Linq (Language Integrated Query) trás a possibilidade de navegarmos dentro de coleções de objetos. Para saber mais sobre LINQ veja aqui…

Um exemplo simples, se tivermos uma lista de Clientes (Dim lista As New List(Of Cliente)) alimentada, podemos buscar os dados neste objeto de forma semelhante a uma consulta.

Podemos adicionar alguns itens:

Dim lista As New List(Of Cliente)

lista.Add(New Cliente With {.Nome = “Cliente 1″, .Idade = 10})

lista.Add(New Cliente With {.Nome = “Cliente 2″, .Idade = 20})

lista.Add(New Cliente With {.Nome = “Cliente 3″, .Idade = 30})

lista.Add(New Cliente With {.Nome = “Cliente 4″, .Idade = 12})

lista.Add(New Cliente With {.Nome = “Cliente 5″, .Idade = 14})

A partir daí, podemos fazer uma query com filtros, comparações e o que mais for necessário:

Dim clientes = From c In lista _

Where c.Idade > 12

Teremos então uma coleção de clientes com a idade maior que 12 anos, então basta navegar na coleção de clientes:

For Each c As Cliente In clientes

Console.WriteLine(c)

Conclusão

São facilidades e recursos que aumentam principalmente a produtividade de desenvolvimento. O que foi apresentado aqui também é possível utilizarmos com o C#, com a sintaxe específica dele.

As linguagens evoluem, e temos que acompanhar isso para utilizarmos ao máximo o poder do que utilizamos.

Programlama

illegalcrew — Sat, 19 Apr 2008 15:31:05 +0000

C ve C++

. Net
Visual C#
Visual C++
Visual Basic
Visual J#
JScript
Perl
Cobol

Visual Basic 6.0 ve Öncesi

Error with .NET Framework 3.5 installation

linuxdevil — Tue, 26 Feb 2008 03:53:15 +0000

I found this cool program called Skylight. It looks pretty wicked awesome. It said I had to install the .NET Framework 3.5 though. So I installed it, and I got errors. Finally, I looked at the “Microsoft Error Report” and it showed a System.TypeLoadException. Can anyone help? I really want to try out this program!

Microsoft .NET Framework 3.5

Maaruthi — Sun, 25 Nov 2007 12:14:06 +0000

.NET Framework 3.5 builds incrementally on the new features added in .NET Framework 3.0. For example, feature sets in Windows Workflow Foundation (WF), Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF) and Windows CardSpace. In addition, .NET Framework 3.5 contains a number of new features in several technology areas which have been added as new assemblies to avoid breaking changes. They include the following:

Deep integration of Language Integrated Query (LINQ) and data awareness. This new feature will let you write code written in LINQ-enabled languages to filter, enumerate, and create projections of several types of SQL data, collections, XML, and DataSets by using the same syntax.
ASP.NET AJAX lets you create more efficient, more interactive, and highly-personalized Web experiences that work across all the most popular browsers.
New Web protocol support for building WCF services including AJAX, JSON, REST, POX, RSS, ATOM, and several new WS-* standards.
Full tooling support in Visual Studio 2008 for WF, WCF, and WPF, including the new workflow-enabled services technology.
New classes in .NET Framework 3.5 base class library (BCL) that address many common customer requests.

IMPORTANT: If you have installed earlier pre-release versions of .NET Framework 3.5, then you must uninstall them prior to running this installation by using Add or Remove Programs.

Download: Microsoft .NET Framework 3.5
Link: Homepage

Ma che c'è di nuovo nel Framework 3.5 e in VS2008?

pythonyan — Thu, 22 Nov 2007 10:54:45 +0000

Dal blog di Raffaele una indispensabile lista che ci indica le differenze tra la versione 2005 e 2008 di VS e relativi framework.

Microsoft entrega Visual Studio 2008 y .NET Framework 3.5 a los desarrolladores (Comunicado de Prensa Digital)

Jaime Adalberto — Wed, 21 Nov 2007 12:16:54 +0000

Comunicado de Prensa Digital

REDMOND, Wash. – 19 de noviembre de 2007 – ¡La espera llegó a su fin! Microsoft anunció el día de hoy que Visual Studio 2008 y .NET Framework 3.5 se han liberado para fabricación (RTM). Con más de 250 características nuevas, Visual Studio 2008 incluye mejoras importantes en cada edición, incluyendo Visual Studio Express y Visual Studio Team System. Los desarrolladores de todos los niveles —desde aficionados hasta equipos de desarrollo empresarial— ahora cuentan con una solución consistente, segura y confiable que les permite desarrollar aplicaciones para las últimas plataformas: Web, Windows Vista, Windows Server 2008, el sistema Office 2007 y otros.

Visual Studio 2008 y .NET Framework 3.5 fueron aclamados en los recientes eventos TechEd Developers and DevConnections, donde se encontraron con el gran entusiasmo de la comunidad de desarrolladores. ¿Qué fue lo que atrajo su atención? Continúe leyendo para conocer todas las características y capacidades nuevas de Visual Studio 2008 y .NET Framework 3.5 que los desarrolladores ya pueden comenzar a aprovechar, así como para obtener enlaces a recursos adicionales.

Links interesantes:

Hojas de datos:

Guía de Producto de Visual Studio 2008

10 Razones para Migrar a Visual Studio 2008

.NET Framework 3.5

Entrevista a “Soma”:

Entrevista a S. “Soma” Somasegar

Video – Canal 9: Conversación con Soma: Visual Studio 2008 y el futuro

Microsoft Blogs:

El .NET Framework 3.5 también brinda varias características nuevas, incluyendo poderosas capacidades para Web 2.0, Arquitectura Orientada a Servicios (SOA) y aplicaciones basadas en Software + Servicios:

Servicios con flujo de trabajo que ofrecen nuevas clases de modelo de programación que simplifican el desarrollo de los servicios habilitados con flujo de trabajo por medio de Windows Communication Foundation y Windows Workflow Foundation. Eso permite a los desarrolladores de .NET Framework crear lógica empresarial para un servicio a través de WF y exponer los mensajes de ese servicio mediante WCF.

Soporte adicional para protocolos de servicios Web en Windows Communication Foundation, incluyendo Web Services Atomic Transaction (WS-AtomicTransaction) 1.1, WS-ReliableMessaging 1.1, WS-SecureConversation, y Web Services Coordination (WS-Coordination) 1.1.

Melinda Ballou, analista de la industria en IDC y directora del Programa de Administración de Ciclo de Vida de las Aplicaciones y Servicios de Administración de TI, habla sobre la importancia de la administración del ciclo de vida de las aplicaciones (ALM) para los clientes: “Las empresas globales exigen un desarrollo de software que abarque los nuevos ambientes Web 2.0, así como servicios web, flujo de trabajo, consulta de información y otras áreas para el desarrollo y la implementación distribuidos. El desarrollo mejorado e integrado y las herramientas ALM que brindan soporte en todas esas áreas, con calidad, administración de cambios y diseño, además de procesos eficaces y estrategias organizativas, son cada vez más críticos para el éxito de la TI y los negocios”.

Visual Studio 2008 y .NET Framework 3.5 son componentes centrales de la plataforma de aplicaciones Microsoft, un conjunto de capacidades integradas, herramientas e infraestructura que permite a las empresas crear aplicaciones más dinámicas y conectadas para poder brindar mayor valor de negocios. Estos lanzamientos también representan un paso importante en el camino hacia el lanzamiento mundial de Windows Server 2008, Visual Studio 2008 y SQL Server 2008 el 27 de febrero de 2008.