18 July 2016
18 July 2016

Accepting Dates in Web Pages

Surely, not much could be simpler than using the HTML INPUT element? Actually, it was always a trouble for dates, what with having to check dates for validity and coping with all the languages and conventions. Now with HTML5, the 'date' type, and so many date-pickers that are either built-in or part of frameworks, it can become a complex decision about how you best deal with date input. Dino explains the issues of inputting dates into web applications.… Read more
20 June 2016
20 June 2016

Crossing the Site Domain with JavaScript

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Browsers try to prevent a range of malicious attacks by preventing content being accessed by a web page from a different domain to the one that the page was fetched from. If you have a legitimate need to do this, it is a bad idea to disable this method of defence: Instead, there are more legitimate and safer ways of performing cross-domain JavaScript calls such as JSONP or Cross-Origin Resource Sharing, as Dino explains.… Read more
16 June 2016
16 June 2016

A Real-World React.js Setup for ASP.NET Core and MVC5

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React is a front-end user interface library developed by Facebook, originally to help them improve their own site. Since then it has grown into somewhat of a phenomenon, with many active users. In this article, Jon Smith provides multiple examples of how to use React with recently released ASP.NET Core MVC, and the existing ASP.NET MVC5 framework.… Read more
24 May 2016
24 May 2016

The Plain Simple Password Page Not So Simple Anymore

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The requirements for the management of passwords have become far more complex over the past few years in response to the increasing sophistication of security breaches. Nowadays, you need to provide a range of features such as hashing, routine change of passwords, preventiion of repeat passwords, email confirmation, auto-generation of random passwords and password quality checks. Dino Esposito explains.… Read more
13 April 2016
13 April 2016

ASP.NET Core: A More Realistic Starter Kit

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ASP.NET Core is a fascinating platform with many good ideas, but in its present form (RC1)there is a culture shock for experienced ASP.NET developers to experience the effort involved in porting a realistic application. There is an obvious advantage in being able to host an application on any web server, but is this enough to compensate for losing the convenience of an integrated pipeline?… Read more
16 March 2016
16 March 2016

Posting Form Content via JavaScript

Web-based applications run smoother if instead of using the traditional form method, they use JavaScript to post data to the server and to update the user interface after posting data: It also makes it easier to keep POST and GET actions separated. SignalR makes it even slicker; it can even update multiple pages at the same time. Is it time to use JavaScript to post data rather than posting via the browser the traditional way?… Read more
23 February 2016
23 February 2016

Introduction to Bower, Grunt, and Gulp in Visual Studio

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Developers are now spending much more time writing and debugging JavaScript, CSS, HTML templates etc. Microsoft have responded by adding better tools for front-end development into their development environment, Visual Studio. In this article Jon Smith uses a sample application to demonstrate how he converted an existing ASP.NET MVC5 application to use these new tools… Read more
16 February 2016
16 February 2016

Keeping POST and GET Separated

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The occasional problems that you can get with POST and GET are typical of the difficulties of separating any command and query operations. This separation is tricky to achieve, at least in ASP.NET MVC. Dino suggests some ways of avoiding errors and minimising the confusing warning messages.… Read more
07 January 2016
07 January 2016

How to Take an Asp.Net MVC Web Site Down for Maintenance

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Keeping a customer facing web site up and performing well is a challenge, especially when you are still adding new features. While providing an "always on" experience for users is preferred there are times when it is easier to take the site "down for maintenance" and fix those things that are just too difficult and costly to do with the site up. Jon Smith describes his solution to a controlled "down for maintenance" approach for ASP.NET MVC sites.… Read more
23 December 2015
23 December 2015

Script Loading between HTTP/1.1 and HTTP/2

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Web pages increasingly suffer from JavaScript-library bloat. Because it is difficult to avoid the awkward wait while these libraries load, there are some techniques for making the loading of these script files less evident to the page-load time. The introduction of HTTP/2 opens up further opportunities to defer script load or do it asynchronously in parallel. Dino explains.… Read more
15 October 2015
15 October 2015

So You Need to Expose JSON Endpoints

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Even the most experienced programmers can be caught unawares by software they've used for years without trouble. Dino Esposito explains why and how the JSON method in an ASP.NET MVC controller class suddenly started to cause an exception on a production server, and how he fixed the problem.… Read more
14 September 2015
14 September 2015

Monitor Server Tasks with ASP.NET SignalR and Bootstrap

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Despite the fact that browsers were designed specifically to get information from the server only by requesting or 'pulling' it, developers have always yearned to be able to push data to browsers from the server. Typically, it would be to display, within a web page within the browser, the progress of a long-running task. Now ASP.NET SignalR and Bootstrap make it possible, with care. Dino explains how.… Read more
13 August 2015
13 August 2015

Selective Updates with ASP.NET SignalR

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SignalR is great for all those tasks that one would otherwise need to rely on AJAX. However, it is much more versatile than this: it allows, for example, a server process to update users' browser windows selectively rather than broadcast to all, and can treat groups of users in different ways. Dino explains how this magic works.… Read more
14 July 2015
14 July 2015

Tracking Online Users with SignalR

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SignalR is all about pushing notifications and data between web server and browser, but you can tap into a by-product of the work it has to do to keep track of the users who are currently online. This will provide a list of the users currently connected to a web community. SignalR has endpoints to push server events of any kind to the client, and thereby provides solutions for a number of common programming tasks.… Read more
10 June 2015
10 June 2015

Tracking Online Users

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Sometimes, the requirements for a web application include a list of users that are currently logged-in. It would seem, at first glance, to be pretty trivial, but because few of us explicitly log out of web applications, the reality can get complicated. Even the best solution is a trade-off. Dino explains the issues and alternatives.… Read more
18 May 2015
18 May 2015

ASP.NET SignalR: Old-fashioned Polling, Just Done Better

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A website often needs to update a page as the underlying data changes. You can, of course, just poll the server every few seconds on the browser via JavaScript, but to receive live updates from a site it is better to push data to the browser, using server-based SignalR. This uses web sockets to do this rather than browser-based polling where web sockets are supported on the browser. Dino explains how.… Read more