Contents tagged with ASP.NET AJAX
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Defining ASP.NET Update Panel Template Contents Dynamically
The ASP.NET UpdatePanel was introduced with the ASP.NET 2.0 AJAX Extensions almost a century ago (kidding, but almost feels like it!
). It allows us to have AJAX-style effects (partial page loads) with very little effort. -
Speech Recognition in ASP.NET
Speech synthesis and recognition were both introduced in .NET 3.0. They both live in System.Speech.dll. In the past, I already talked about speech synthesis in the context of ASP.NET Web Form applications, this time, I’m going to talk about speech recognition.
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Taking Picture Snapshots with ASP.NET and HTML5
This is another post on HTML5 and ASP.NET integration. HTML5 brought along with it a number of great JavaScript APIs; one of them is getUserMedia, which is W3C standard and you can get a good description of it in MDN. In a nutshell, it allows access to the PC’s camera and microphone. Unfortunately, but not unexpectedly, it is not supported by any version of Internet Explorer, but Chrome and Firefox have it.
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ASP.NET Callback Panel
Continuing with my quest for reusable, no dependencies, Web Forms AJAX controls, this time I wanted a replacement for the venerable UpdatePanel control. Specifically, I wanted to address the following issues:
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Speech Synthesis with ASP.NET and HTML5
The .NET framework includes the SpeechSynthesizer class which can be used to access the Windows speech synthesis engine. The problem with web applications is, of course, this class runs on the server. Because I wanted a mechanism to have speech synthesis (text-to-speech) fired by JavaScript, without requiring any plugin, I decided to implement one myself.
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ASP.NET Upload Panel
I have been playing recently with HTML5, and one thing that I got to understand really well was the new upload mechanisms available. Specifically, I wanted to understand how SkyOneDrive, Google Drive, Dropbox, etc, all support dropping files from the local machine, and how to use it in an ASP.NET Web Forms (sorry!) project, and I got it!
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Client Callbacks In Action Part 1: Auto Completing Text Boxes
I have talked about client callbacks in the past, and even provided a general-purpose control for invoking code on the server-side. This time, I will provide two more examples:
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My All Time Favorite Posts
Since this blog started, back in 2008, I wrote a lot of posts. I’d say some are still up to date. I picked a few of them, those I’m more proud of, in no particular order.
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Wrapping ASP.NET Client Callbacks
Client Callbacks are probably the less known (and I dare say, less loved) of all the AJAX options in ASP.NET, which also include the UpdatePanel, Page Methods and Web Services. The reason for that, I believe, is it’s relative complexity:
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ASP.NET MVC Validation Complete
OK, so let’s talk about validation. Most people are probably familiar with the out of the box validation attributes that MVC knows about, from the System.ComponentModel.DataAnnotations namespace, such as EnumDataTypeAttribute, RequiredAttribute, StringLengthAttribute, RangeAttribute, RegularExpressionAttribute and CompareAttribute from the System.Web.Mvc namespace. All of these validators inherit from ValidationAttribute and perform server as well as client-side validation. In order to use them, you must include the JavaScript files MicrosoftMvcValidation.js, jquery.validate.js or jquery.validate.unobtrusive.js, depending on whether you want to use Microsoft’s own library or jQuery. No significant difference exists, but jQuery is more extensible.