Abu's blog : .NET

Tutorial Windows Communication Foundation (WCF) - ServiceContract & OperationContract - Attributes

abu — Mon, 20 Jul 2009 13:07:00 GMT

ServiceContractAttribute

Name and Namespace - The name and namespace are the optional attibutes. Default name is same as the contract type and namespace is http://tempuri.org. It is always recommondable to use Namespace to specify proper namespace which remove the conflict of the datatype/contract.
CallbackContract - Return contract in a two-way (duplex) conversation.
HasProtectionLevel and ProtectionLevel - Specifies whether all messages supporting the contract have a explicit ProtectionLevel value.
Default ProtectionLevel is ProtectionLevel.None.
ConfigurationName - The name of the service element in the configuration file to use.
SessionMode - This is to specify whether the contract requires a binding that supports sessions.

OperationContractAttribute

Name: The name of an operation is part of a service contract. Default is the method name.
Action: The send message dispatches to the method for the operation based on action.
ReplyAction: To specify the reply message
IsOneWay: Specifies whether the operation is one directional that an does not return a reply message. This is commonly used for notification service.
ProtectionLevel
IsInitiating: Specifies if the operation is the intial operation in a session.
IsTerminating: Specifies if the session will be terminated after the operation
AsyncPattern: To asynchronously using a Begin/End method pair

"M" is "Oslo" Modeling Language Language > Tools - Query Analyzer or SQL Server Management Sudio for SQL and “Intellipad” for "M"

abu — Sat, 17 Jan 2009 13:12:00 GMT

The evolution of programming languages have been categorized as 1GL, 2GL, 3GL, 4GL....E.g. Machine Language -> Assembly Language -> C / Fortran -> SQL / Focus 4GL. The evolution of these languages are towards Low level language to High Level language.

In 1995, I stated learning computer languages. First I learned C, just after going through Fundamentals of Computer. In my first Academic project using C, I spent lots of time only for writing thousands lines of code. During this period I have gone through System Analysis and Design - where I learned about how to translate / transform the business application into computer systems [application]. Then I learned C++ and OOP, it was too nice experience, where I could compare the whole thing to real life cases. But it was amazing when I came to know SQL - real 4GL... Writing SQL Statement is about "WHAT" not "HOW" [With few exceptions - Query Hints etc.]. Using SQL generally few lines code computes the values from a set of collections as the resultset/output. Then I started my career with one of the biggest giant - Petroleum Company in India using Sybase and Power Builder. Here I got opportunity to work with all my favourite technologies.

About the future or coming technologies, termed as NEXT GEN Application, I expressed very early in one of my post published on September 15, 2005 Real Challenge to the architect for architecting and designing for FUTURE application development’s method.

That time I was thinking that DSL, ORM, Modeling language were dream and will be goals for the language developer.

Now Microsoft comes up to this with a fantastic way!!!

In last version - .NET Framework 3.5, we got LINQ, LINQ to SQL, LINQ to XML, LING to Object.... Here we focused more on the Entities, Visual Studio writes the code for data manipulation using SQL/XPath all underlying technologies... we stopped thinking about implementation to map the data source to object classes for .NET to some extents. Here we got LINQ to SQL, LINQ to XML and so on so...

This is not the "Full Stop" ("."). Along with more advancement, Microsoft came up with "M". It is "Oslo" Modeling Language which is a declarative language for working with data in more readable way for Structuring the the data as well as for querying too. It's not about how data is stored or accessed, even not by implementation of specific technology.

M builds on three basic concepts: values, types, and extents.

A value is the data which follows the rule
A type describes a set of values.
An extent provides dynamic storage for values.

M has been designed to map the relational model too. Using “Intellipad” tool of “Oslo”, model the data and the corresponding T-SQL statements generated by the compiler. Here “M”->SQL translates “M” "modules" to SQL "schemas."

Url Rewriting using WCF

abu — Mon, 22 Dec 2008 21:26:00 GMT

One of my interesting thing is "URL Rewriting". The first time I have implemented it through implementing HTTPHandler using .NET 1.1. Same concept I have applied to a Document Management Service [DMS] project to PUT the document and GET the document by an .ASMX WebService. There I added verb * using wild charater in IIS 6.0 as well as added <httpHandler> node in web.config. Then we got in different way in .NET 2.0. Finally this time we got using URITemplate, WebGet, WebInvoke in WCF 3.5 SP1.

The UriTemplate class provides methods for working with sets of URIs that share a common structure for URL Rewriting.
As this follows based on the URL pattern comprises left portion of URI which is fixed and rest is dynamic where certain parameter is getting manipulated or changed to request a page. System.UriTemplate provides runtime support for URI template syntax.
UriTemplate is to manipulate parameters using ByName and ByPosition.
[WebGet] - supports HTTP GET method
WebOperationContext provides easy access to Web specifics (e.g., headers, status codes)
[WebInvoke] supports other HTTP methods; POST is default method

http://blogs.msdn.com/endpoint/archive/2008/08/22/rest-in-wcf-part-ix-controlling-the-uri.aspx

http://weblogs.asp.net/jgalloway/archive/2007/05/02/mix07-wcf-adding-system-uritemplate-webget-and-webinvoke.aspx

Corresponding to previous version's URL concept the available resources are in

http://msdn.microsoft.com/en-us/library/ms972974.aspx

http://weblogs.asp.net/scottgu/archive/2007/02/26/tip-trick-url-rewriting-with-asp-net.aspx

http://www.simple-talk.com/dotnet/asp.net/a-complete-url-rewriting-solution-for-asp.net-2.0/

WAW!!! What a serie of blog posts for "Covariance and Contravariance" - C# Future...

abu — Tue, 16 Dec 2008 18:46:00 GMT

So nicely step by step blogged by Eric Lippert for "Covariance and Contravariance" as "Fabulous Adventures In Coding"

Covariance and Contravariance, Part Eleven: To infinity, but not beyond

Immutability in C# Part Three: A Covariant Immutable Stack

Covariance and Contravariance in C#, Part Ten: Dealing With Ambiguity

Covariance and Contravariance in C#, Part Nine: Breaking Changes

Covariance and Contravariance in C#, Part Eight: Syntax Options

Covariance and Contravariance in C# Part Seven: Why Do We Need A Syntax At All?

Covariance and Contravariance in C#, Part Six: Interface Variance

Covariance and Contravariance In C#, Part Five: Higher Order Functions Hurt My Brain

Covariance and Contravariance in C#, Part Four: Real Delegate Variance

Covariance and Contravariance in C#, Part Three: Method Group Conversion Variance

Covariance and Contravariance in C#, Part Two: Array Covariance

Covariance and Contravariance in C#, Part One

C# Dynamic - CSharp's new feature of the coming version 4.0

abu — Mon, 15 Dec 2008 17:50:00 GMT

Very good resources for the coming version...

Sam Ng

Dynamic in C# Part One
Dynamic in C# Part Two

Chris Burrows

Eric Lippert

PDC

TL16: The Future of C#
- Anders Hejlsberg
TL10: Deep Dive: Dynamic Languages in .NET
- Speaker: Jim Hugunin
TL11: An Introduction to Microsoft F#
- Speaker: Luca Bolognese
TL12: Future Directions for Microsoft Visual Basic
- Speaker: Paul Vick and Lucian Wischik
TL44 IronRuby: The Right Language for the Right Job
- Speaker: John Lam
TL46: Microsoft Visual C# IDE: Tips and Tricks
- Dustin Campbell
TL54: Natural Interop with Silverlight, Office and Python
- Alex Turner
TL57: A Panel on the Future of Programming Languages
- G. Bracha, D.Crockford, A. Hejlsberg, E. Meijer, W.Schulte, J. Siek

"What NEXT?" - Visual Studio 2010 and with C# 4.0 and VB.NET 10.0 (Oslo)

abu — Sat, 29 Nov 2008 18:19:00 GMT

"What's Next?" - Everybody is interested to know about new and upcoming things. While I purchase new thing, I could not wait to use. Previously I was curious to know abour Whidbey, Orcas, WinFx ( Indigo, Avalon)... Next???

Now it is the case for Oslo too.

Now after PDC 2008, may many of us come to know about Visual Studio 2010.

"10" - this one very significant number for football player or hockey player; only the most important player are getting No. 10 as their jersey number.

Yes, this time, it is "10" - Visual Studio 2010, VB.NET 10, Visual Studio 10 is the NEXT.

Here are some very useful links related to this.

http://blogs.msdn.com/kirillosenkov/archive/2008/11/20/links-about-visual-studio-2010-and-c-4-0.aspx

http://weblogs.asp.net/pgielens/archive/2008/10/27/the-future-of-c-4-0.aspx

http://code.msdn.microsoft.com/csharpfuture

http://code.msdn.microsoft.com/csharpfuture/Wiki/View.aspx?title=Home&version=4

http://blogs.msdn.com/bclteam/archive/2008/11/04/what-s-new-in-the-bcl-in-net-4-0-justin-van-patten.aspx

C# Language Evolution - Features of C# 4.0

abu — Sat, 29 Nov 2008 06:27:00 GMT

C# Language Enhancement

C# 3,0 LINQ

C# 3.0 and LINQ With Language Extention

C# Dynamic Language Enhancement

C# 4.0 can be found on the Downloads page. The CSharpDynamic samples include several projects showing how to use Dynamic with Office, IronPython and other technologies. There is also a covariance and contravariance example, and an example show how to use the new IDynamicObject interface to create native C# objects that can be called dynamically.

The document New Features in C# 4.0 is a high level description of the additions to the C# language, and the samples are designed to show off the new language features, particularly around the dynamic scenario.

WPF, WCF, WF - .NET 3.0 Guide and Self Learning Resources

abu — Sun, 23 Nov 2008 23:34:00 GMT

In my free time I like to see videos from Channel9, TechEd and PDC sessions.

Guide and Self Learning Resources are avilable @

NetFxGuide

http://www.netfxguide.com/guide/wcf.aspx

http://www.netfxguide.com/guide/WPF.aspx

http://www.netfxguide.com/guide/WF.aspx

channel9

http://channel9.msdn.com/tags/WCF/

http://channel9.msdn.com/tags/WF/

http://channel9.msdn.com/tags/WPF/

WS-* specifications and WCF

abu — Tue, 11 Nov 2008 18:20:00 GMT

To create robust distributed service with WCF it is very essential to understand WS-* specifications.

List of Web service specifications - http://en.wikipedia.org/wiki/List_of_Web_service_specifications

In .NET this supports as Web Services Enhancements (WSE). http://en.wikipedia.org/wiki/Web_Services_Enhancements

The Web Service Specifications is to provide interoperable protocols for Security, Reliable Messaging, and Transactions http://msdn.microsoft.com/en-us/library/ms951274.aspx

Windows Communication Foundation (WCF) implements a number of Web services protocols. http://msdn.microsoft.com/en-us/library/ms734776.aspx

The article for WCF implementation of the WS-ReliableMessaging http://msdn.microsoft.com/en-us/library/aa480191.aspx is very nice.

ASP.NET Architecture - HTTP Handlers, HTTP Pipelines

abu — Tue, 04 Nov 2008 14:31:00 GMT

To be an Advanced ASP.NET developer this articles help to clear in depth, very low level understanding of ASP.NET Architecture.

http://msdn.microsoft.com/en-us/magazine/cc188942.aspx

New .NET Logo

abu — Mon, 27 Oct 2008 17:58:00 GMT

This is new logo... http://blogs.msdn.com/chkoenig/archive/2008/10/24/new-net-logos-announced-today.aspx

OSLO - Includes .NET Framework 4.0

abu — Thu, 22 May 2008 18:26:00 GMT

http://www.microsoft.com/presspass/press/2007/oct07/10-30OsloPR.mspx

http://blogs.microsoft.co.il/blogs/adlaim/archive/2007/11/30/net-framework-4-0-quot-biztalk-soa-express-framework-quot.aspx

http://blogs.microsoft.co.il/blogs/adlaim/archive/2008/01/22/net-framework-4-0-quot-biztalk-soa-express-framework-quot-part2.aspx

Guideline and Check List for .NET Coding

abu — Thu, 03 Apr 2008 17:30:00 GMT

• Design Guidelines for Class Library Developers
Relationship to the Common Type System and the Common Language Specification Describes the role of the common type system and the Common Language Specification in class library development.

•          Naming Guidelines
Describes the guidelines for naming types in class libraries. •          Class Member Usage Guidelines
Describes the guidelines for using properties, events, methods, constructors, fields, and parameters in class libraries. •          Type Usage Guidelines
Describes the guidelines for using classes, value types, delegates, attributes, and nested types in class libraries. •          Guidelines for Exposing Functionality to COM
Describes the guidelines for exposing class library types to COM. •          Error Raising and Handling Guidelines
Describes the guidelines for raising and handling errors in class libraries. •          Array Usage Guidelines
Describes the guidelines for using arrays in class libraries and how to decide whether to use an array vs. a collection. •          Operator Overloading Usage Guidelines •          Describes the guidelines for implementing operator overloading in base class libraries. •          Guidelines for Implementing Equals and the Equality Operator (==) •          Describes the guidelines for implementing the Equals method and the equality operator (==) in class libraries. •          Guidelines for Casting Types •
Describes the guidelines for casting types in class libraries. •          Common Design Patterns •
Describes how to implement design patterns for Finalize and Dispose methods, the Equals method, callback functions, and time-outs. •          Security in Class Libraries •
Describes the precautions to take when writing highly trusted class library code, and how to help protect resources with permissions. •          Threading Design Guidelines •
Describes the guidelines for implementing threading in class libraries. •          Guidelines for Asynchronous Programming Describes the guidelines for implementing asynchronous programming in class libraries and provides an asynchronous design pattern.•          Guidelines for Web Application Security
It covers potential security vulnerabilities, general coding considerations.

Ref. http://msdn2.microsoft.com/en-us/library/ms998574.aspx •          Code Review: .NET Application Performance
Code reviews should be a regular part of your development process. Performance and scalability code reviews focus on identifying coding techniques and design choices that could lead to performance and scalability issues. The review goal is to identify potential performance and scalability issues before the code is deployed. The cost and effort of fixing performance and scalability flaws at development time is far less than fixing them later in the product deployment cycle.

Ref: http://msdn2.microsoft.com/en-us/library/ms998574.aspx •          Security Checklist: .NET Framework 2.0
Link: http://msdn2.microsoft.com/en-us/library/aa480474.aspx •          Security Checklist: ADO.NET 2.0
Link: http://msdn2.microsoft.com/en-us/library/aa480473.aspx •          Security Checklist: ASP.NET 2.0
Link: http://msdn2.microsoft.com/en-us/library/ms998249.aspx

Quick Start - Using System.DirectoryServices

abu — Tue, 04 Mar 2008 14:53:00 GMT

I am new to this area. Will start working on Directory Services .... I have identified these two resuorces to start...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sds/sds/using_system_directoryservices.asp

http://geekswithblogs.net/mhamilton/archive/2005/09/30/55621.aspx

http://geekswithblogs.net/mhamilton/archive/2005/10/04/55920.aspx

http://geekswithblogs.net/mhamilton/archive/2006/07/15/85303.aspx

Code Review - .NET Application

abu — Mon, 18 Feb 2008 18:22:00 GMT

Code Review: .NET Application Performance -
To locate and review performance and scalability issues in your managed code applications:

http://msdn2.microsoft.com/en-us/library/ms998574.aspx

This is a very useful article for reviewing code built using the .NET Framework for potential security

http://msdn2.microsoft.com/en-us/library/aa302437.aspx

Best Practices - Improving .NET Application Performance and Scalability.

abu — Fri, 04 Jan 2008 14:40:00 GMT

For few days I am thinking how to build Best Practices for a .NET application; I have lot of resources for this; so many presentations, sample application, articles; but finally I am myself totally agree that Patterns & Practices recommented by Microsoft is the best and baseline for going into deep. Here is the link...

http://msdn2.microsoft.com/en-us/library/ms998512.aspx

Scott Hanselman: What Great .NET Developers Ought To Know (More .NET Interview Questions)

abu — Wed, 10 Oct 2007 17:03:00 GMT

So nice !!!

This is great discussion... to get success in an Interview...

http://www.hanselman.com/blog/WhatGreatNETDevelopersOughtToKnowMoreNETInterviewQuestions.aspx

Source Code for .NET framework

abu — Thu, 04 Oct 2007 17:47:00 GMT

I am very much interested to go through Source Code for .NET framework

http://weblogs.asp.net/scottgu/archive/2007/10/03/releasing-the-source-code-for-the-net-framework-libraries.aspx

I think you too!!!

Download now!!! .NET Framework 3.0 has been released!

abu — Tue, 10 Apr 2007 09:36:00 GMT

The .NET Framework 3.0 has officially been released! You can download the .NET Framework 3.0 components here:

I was totally exited when .net 2.0 was released.
This was the excellent product where developer's different problems and issues are considered fantastically.
ASP.NET 2.0 makes developer life easy!!!

Less work output Lot...

Where based on the developer experience .NET 2.0 was considered too much and it's a real up-gradation on .net 1.x; where net 3.0 was developed to the angles more of Architecture's view... this is the product where not only developer experiences are considered, mainly make easy for Interoperable and Strong, Rich Architecture oriented Application.

I felt VB 5.0 = ( VB 4.0 ) + 1
VB 6.0 = ( VB 5.0 ) + 1

Then VB.NET 7.0 not ( VB 6.0 ) + 1.... but this .NET 1.0

.NET 1.0 = ( VB 6.0 ) + 1 + 1 + 1 + 1 ............

Yes .NET 1.1 is just up-gradation of .NET 1.0
Also .NET 2.0 = ( .NET 1.x ) + 1

Like the changes happened in .NET 1.0; .NET 3.0 is having a big different where I feel using all of .NET 3.0's concept we will real in another arena... Hope so.... I love .NET 3.0

XML .NET Web Service, SOAP

abu — Fri, 19 Jan 2007 07:09:00 GMT

I found these two links are very much useful for the foundation level atleast to paly with these...

http://www.topxml.com/soapformatter/default.asp

http://www.xmlme.com/XmlWebServices.aspx?tabindex=4&tabid=11