JavaScript for Line of Business Applications

In this post I am not going to explain, what is REST? I assume you are already aware of REST concepts hence on this post to create REST API on Node.js which will perform CRUD operations. I am going to use Visual Studio to create Node Application.

First we are going to create data and CRUD operation on that. Keep in mind that we are going to expose CRUD operation as REST API on a JavaScript Array. In real projects you may want to perform these operations on database.

Let us start with writing function to return products. If you notice function is taking two parameters req and res. We send data in HTTP response with res.send . In this case we are sending JSON object product as HTTP response...

This article is an introduction to Knockout.js and CRUD Operations in ASP.NET Web Forms using Knockout.JS.

The development paradigm has been changing rapidly for a last few years. The out of the box technologies have been introduced to develop applications with fast, scalable, extensible structure, easy to maintain and easy to use. Knockout.JS is also one of the examples of such emerging technologies. I take an opportunity to explain the concept and topic my way.

In this tutorial we will go through a process of building a sample shopping cart with real time capabilities. On top of that, we'll also throw in a real time admin order overview.

The technologies used will include:

* Knockout.js - for reactive client side data binding

* ASP.NET Web API - as an API to retrieve data and send orders to the server side

* SignalR - to notify interested parties in changes to the item stock quantities & order status

Since the topic of building a functional e-commerce solution is obviously extremely broad, we will take a few simplifications, which will allow us to focus our attention on the real time aspects of the cart and avoid distractions. We will treat security (user login/logout) and data persistence (we'll just store the data in memory) as out of scope.

This article shows Databinding and Templating using Knockout in the ASP.NET Web API. In this article we use the Knockout.js file. Knockout contains a JavaScript library and this library helps for creating a responsive display and editor user interface under laying of the data model.

Use the following procedure to create a sample.

Single-Page Applications (SPAs) are Web apps that load a single HTML page and dynamically update that page as the user interacts with the app.

SPAs use AJAX and HTML5 to create fluid and responsive Web apps, without constant page reloads. However, this means much of the work happens on the client side, in JavaScript. For the traditional ASP.NET developer, it can be difficult to make the leap. Luckily, there are many open source JavaScript frameworks that make it easier to create SPAs.

In this article, I’ll walk through creating a simple SPA app. Along the way, I’ll introduce some fundamental concepts for building SPAs, including the Model-View-Controller (MVC) and Model-View-ViewModel (MVVM) patterns, data binding and routing.

Tony Patton reviews a plugin that brings Node.js development to Visual Studio 2012 and 2013. See what his tests reveal.

Node.js is a powerful platform for building all kinds of applications. One caveat with using different platforms is that some tools cannot be used for certain technologies. This was true for Node.js and Visual Studio, but the Node.js Tools for Visual Studio plugin allows you to use a familiar tool to build Node.js applications. 

Writing software with JavaScript can be a lot like writing software in the dark. There is no static typing and no compiler, most errors are not found untill the code is executed. Hopefully that is in a test environment, and not when a user is working with your software. I think that a lot of emphasis should be on automated testing and analysing the code. At my current project, we have a rather nice setup in place to do this and guard our quality.

The thing that caused a bit more work is that we are working in a Microsoft environment. So we have Visual Studio (2013) and TFS (2013). The rest of our project consists of C# and we like to work in Visual Studio. Any tooling that we add is preferred to integrate with our current tools. We already have gated checkins and continous integration builds for the .NET code. The CI build runs everything that is in the gated checkin build plus more (and slower) tests.

This is a series of posts about AngularJS and our experiences with it while migrating the client of a complex enterprise application from Silverlight to HTML5/CSS/JavaScript using AngularJS as a framework. 

I got some feedback from readers that they didn’t like that I never introduces how to implement a RESTful API which can then be consumed by an Angular application. I though that I should change this and have decided to publish this post where I show how a simple REST API can be implemented.

* Built upon Knockout and the MVVM Model
* All class properties are ko.observables and collections classes are ko.observableArrays
* Only 17k minimized
* Supports MS SQL Server, Azure, SQL CE, Oracle, PostgreSQL, MySQL, SQLite
* Supports WCF JSON Service and RESTFUL API's
* Supports Full Hierarchical Data Models
* Hierarchical Model Supports Lazy Loading (See video below)
* All saves take place within transactions, including complex hierarchcial saves
* Two Providers, either pure XHR or JQuery Ajax (you choose which one you want to use)
* Tracks Row Level and Column Level Dirty State
* Tracks Original Values so Edits can be Cancelled via RejectChanges
* Generic - Can be used with any ORM or Database Backend

One of the most exciting developments in web technology of the past year is, in my opinion, the development of cross-browser javascript socket libraries and the addition of web sockets as part of the HTML5 standard. Although push communication has been available for a long time, it was hard to implement, used proprietary technologies and was hindered by performance and scalability problems. But libraries like socket.io and services like Pusher have changed this and have made implementing two-way communications on the web very simple. I feel that we are just at the beginning of a new generation of exciting web applications.

For our cloud auction project, we want to use web sockets to send price, availability and product updates from the server to all active clients. It’s important that these updates are synchronized as much as possible, so that every user sees the same price at the same time. We want to avoid users hammering our servers by refreshing the page in their browser, pressing F5 every second. We are starting from our ASP.NET MVC cloud auction website, a standard website based on the MVC Internet Website template. I described several parts of it in other posts in this series.

This article is a tutorial of how to set up the knockout.js environment in a MVC4 application and perform CRUD operations on it.

I have been browsing multiple sites for a complete end-to-end tutorial or article upon CRUD operations using Knockout.JS and MVC 4. Unfortunately all I found were incomplete or short explanations. In my last article we learned about imlementation of CRUD in ASP.Net web forms using MVC and EntityFramework. This article is the continuation of the series. My effort in this article will be a kind of tutorial to explain how to set up the knockout.js environment in a MVC4 application and perform CRUD operations on it.