Community Blogs

You’ve probably noticed that Jörn Zaefferer’s jQuery validation plugin has been gaining momentum in the ASP.NET community lately. Between Microsoft’s implied endorsement via ASP.NET MVC 2.0 integration and the plugin’s recent inclusion on the Microsoft AJAX CDN, adoption is only increasing. Unfortunately for those who don’t or can’t use ASP.NET MVC yet, using the validation [...] ### Originally posted at Encosia . If you're reading this elsewhere, come on over and see the original. Using jQuery validation with ASP.NET WebForms Read More...

Cropping images in ASP.NET is easy task to do if you use right tools. In this posting I will introduce how to crop images using Jcrop and System.Drawing namespace classes. What we are building is simple and user-friendly image cropping interface that also demonstrates some simple features of Jcrop. Believe me, your users will love it! Jcrop is jQuery based library that brings crop margins selection to client side. Before starting you need two (free) JavaScript libraries: jQuery Jcrop After downloading them create new ASP.NET Web Application project and unpack those libraries to js directory. Also copy file js/Jcrop/css/Jcrop.gif to root folder of your project and add image you want to crop to same folder. Expected result As a first thing we...

I wrote a post about a month ago about using xVal with NHibernate Validator 1.2 which solved a problem I was having upgrading the xVal ‘in-the-box’ provider to work with a newer version of NHibernate Validator . There was a caveat that my solution only worked for ValidatorMode.UseAttribute and I wouldn’t catch XML or Loquacious (or other?) validation.  This seemed to work OK, but Fabio Maulo wrote a comment to that post saying NHV has metadata which should be the same no matter which validation mode was used. So I decided to investigate how I could get the metadata without resorting to the NHibernate.Validator.Mappings validationMode specific engines (I was using ReflectionClassMapping, but there are others like XmlClassMapping). I think...

I’ve already posted twice about that little class browser application. The first iteration was mostly declarative and can be found here: http://weblogs.asp.net/bleroy/archive/2009/09/14/building-a-class-browser-with-microsoft-ajax-4-0-preview-5.aspx The second one was entirely imperative and can be found here: http://weblogs.asp.net/bleroy/archive/2009/10/15/entirely-unobtrusive-and-imperative-templates-with-microsoft-ajax-4-preview-6.aspx This new version builds on top of the code for the imperative version and adds the jQuery dependency in an attempt to make the code leaner and simpler. I invite you to refer to the imperative code (included in the archive for this post ) and compare it with the jQuery version, which shows a couple of ways...

Sobre o jQuery Apesar de ser um dos mais comentados “lançamentos” dos últimos anos, muita gente ainda não sabe e não tem prática com jQuery. Mas o mais legal disso é que o jQuery não tem nada de novidade por baixo dos panos. Basicamente, jQuery é um projeto resultante da soma do CSS, com seus seletores, e das possibilidade do Java Script, tudo isto escrito em uma nova linguagem, um novo idioma. Para exemplificar, em um passado não muito distante, desenvolver a comunicação Ajax era algo complicado.  Exigia-se muitas linhas de código, enfrentava-se dificuldade com testes, com retornos, etc. Hoje, com jQuery, é possível utilizar seus recursos “prontos” mantendo a preocupação nas regras do negócio ao invés da estrutura técnica para realizá...

Hello, Already plenty of articles have been published explaining how to work with AjaxControlToolkit extender controls.In this article I will provide with a general tip on working with AjaxControlToolkit which is applicable to all the extender controls of the Toolkit. In general we can incorporate extender controls in our web page by declaring their markup code.But many times it is required to access these extender controls in our client side javascript code so that we can manipulate certain attributes or properties of the extender control declared in our web page. Its same as like declaring a asp:TextBox control in our web page and then setting its "Text" property in code behind.But unlike asp.net server controls , AjaxControlToolkit...

Hello, In this article I will not be discussing on how to write selectors and their usage in jQuery but will point you to two very useful tools which will help you in getting the right selector the very first time.But before that lets list down the various type of selectors that we can use in our jQuery code.Following is the list of various type of selector :- Class Selector ID Selector Universal Selector Attribute Selector Descendant Selector Pseudo Class Selector Pseudo Element Selector Now there are plenty of articles on web on the previously mentioned selectors and their usage in jQuery code.Now its important to get the right selector to select an element in your webpage but what is even more important is to get the right selector.Well its...

Today is the release of the sixth preview of Microsoft Ajax Library. Don’t get fooled by the somewhat silly and long name: this is a major release in many ways. The scripts have been majorly refactored since preview 5. Check out the other posts out there (links at the bottom of this post) to see just some of the many new features that are in there. Some of my favorite are all the small improvements that have been made to make imperative instantiation of components and templated contents easier than ever. Many of you have told us that you preferred to do things imperatively and this release makes it a lot better. When Preview 5 came out, I built a simple class browser using the declarative syntax. The class browser shows the hierarchy of namespaces...

Another simple trick today. Very often people ask about how to change the tab name on sites created with the Multipage Workspace Template. A simple enough request but not something you can do out of the box. Or can you? Okay, let’s take a step back. Let’s say you want a site with tabs. There’s a built-in template under the Meetings group called Mutiplage Meeting Workspace. It creates a site with tabs and allows you to add new tabs (Web Part Pages) and place whatever Web Parts you want on each tab. Just a note that this is actually a Meeting Workspace template and isn’t quite like a normal site template. You’ll find oddities like the inability to create subsites and weird hidden “1” folders. This is because meeting workspaces are designed to...

By now, you probably already know that Google hosts jQuery on its AJAX APIs CDN, free of charge. As I’ve discussed here in the past, I’m a big fan of using their CDN to achieve decreased latency, increased parallelism, and better caching. If you’ve explored the AJAX APIs documentation a bit, you may know that jQuery [...] ### Originally posted at Encosia . If you're reading this elsewhere, come on over and see the original. Do you know about this undocumented Google CDN feature? Read More...