Visual Basic and .Net News and Resources
This article looks at a line of business application built using .NET 2.0, Windows Communication Foundation, and Visual Studio 2005 that automatically chooses the most suitable connection based on the state of the user’s network connection, providing reliability via message queuing on top of it.
Since network connectivity cannot always be guaranteed, what happens when the network goes down or a network connection is simply unavailable? How can you provide your users with the best connected experience regardless of the state of the network?
I’ll start off with an overview and step-by-step configuration of a WCF service that exposes multiple bindings and wrap up with a pattern for adding logic to a Windows Forms test harness client that detects available network options and chooses the appropriate WCF binding at run time. Where the network is down or otherwise unavailable, I will provide the user with a reliable, “always on” computing experience using Queued Calls via Microsoft Message Queuing (MSMQ). As you will learn, MSMQ integrates seamlessly with WCF services. When network state is online, I will explore appropriate uses for TCP and HTTP depending on the geographical location of the user.
In addition to queued calls, WCF provides a number of powerful reliability features that are supported out of the box including WS-Reliable Messaging for managing message delivery even across multiple hops, and WS-Atomic Transactions for implementing distributed transactions. In this article, I will focus specifically on Queued Services, which are implemented seamlessly in WCF using Microsoft Message Queue (MSMQ). I will discuss these additional reliability features in future articles.
Read the rest of the article at DevX.
The software maker puts the “D” in declarative programming as a key part of its larger Oslo model-driven development strategy.
Microsoft, which in October officially announced its intent to support model-driven development in a broad strategy known as “ Oslo,” is beginning work on a new declarative programming language, a supporting editing tool and other components of the initiative, according to sources close to the company.
Microsoft announced Oslo as part of an amorphous vision for simplifying application development, design, management and deployment. Company officials said Oslo will represent a core set of technology investments that will encompass both a services infrastructure—spanning server, client and the Internet “cloud”—and an executable modeling platform that will include a general-purpose modeling language, tools and repository.
However, the sources said that at the heart of the Oslo initiative lies a new declarative programming language currently known simply as “D.” If, as the code name implies, Oslo were a city, D would be the key to Oslo.
According to the sources, D is a new language under development at Microsoft aimed at building applications and components for the Oslo repository. However, D is but one piece of a much larger puzzle that will include graphical modeling tools and other components. D is expected to be a textual modeling language suitable for use by business professionals and domain experts.
Read the rest at eWeek.
As MP3 Players only accept audio, you need to convert the audio from your videos to MP3 and other popular audio formats. Here I’ll use MelodyCan Ultra Video software to convert audio from video to MP3, M4A, WMA, AAC, WAV, OGG which supports all the iPod and other MP3/ MP4 players.
MelodyCan has a capability to watch an arbitrary media library folder and convert media content as soon as it was downloaded from a music provider or simply copied to that folder. This is implemented by means of ‘Automatic Conversion Folder’ engine and can be configured with corresponding fields in MelodyCan settings dialog.