Contents tagged with AJAX
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Posting AJAX Requests to ASP.NET Core MVC
In the past, I’ve had trouble doing something that is apparently simple: invoking a simple action method in a controller using AJAX. Although it is indeed simple, when using jQuery, it may require some attention, hence this post.
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ASP.NET Core Pitfalls – AJAX Requests and XSRF
When using Anti Cross Site Scripting Forgery (XSRF) protection in your application, which is on by default, you may be surprised when you try to AJAX submit to a controller and you get a HTTP 400 Bad Request: this may be happening because the framework is blocking your request due to XSRF.
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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. -
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 2 : Self-filling Drop Down List
On the first part of this two-post series I presented a text box that has the ability to suggest values, after a number of characters has been entered. It does this by leveraging the client callbacks functionality of ASP.NET. This time, I am going to show a drop down list that exposes a JavaScript function (fill) that receives a value, and will pass that value to a server-side event also through a client callback where we have the option to populate the drop down.
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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.