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  • jQuery Templates with ASP.NET MVC

    - by hajan
    In my three previous blogs, I’ve shown how to use Templates in your ASPX website. Introduction to jQuery TemplatesjQuery Templates - tmpl(), template() and tmplItem()jQuery Templates - {Supported Tags}Now, I will show one real-world example which you may use it in your daily work of developing applications with ASP.NET MVC and jQuery. In the following example I will use Pubs database so that I will retrieve values from the authors table. To access the data, I’m using Entity Framework. Let’s pass throughout each step of the scenario: 1. Create new ASP.NET MVC Web application 2. Add new View inside Home folder but do not select a master page, and add Controller for your View 3. BODY code in the HTML <body>     <div>         <h1>Pubs Authors</h1>         <div id="authorsList"></div>     </div> </body> As you can see  in the body we have only one H1 tag and a div with id authorsList where we will append the data from database.   4. Now, I’ve created Pubs model which is connected to the Pub database and I’ve selected only the authors table in my EDMX model. You can use your own database. 5. Next, lets create one method of JsonResult type which will get the data from database and serialize it into JSON string. public JsonResult GetAuthors() {     pubsEntities pubs = new pubsEntities();     var authors = pubs.authors.ToList();     return Json(authors, JsonRequestBehavior.AllowGet); } So, I’m creating object instance of pubsEntities and get all authors in authors list. Then returning the authors list by serializing it to JSON using Json method. The JsonRequestBehaviour.AllowGet parameter is used to make the GET requests from the client become allowed. By default in ASP.NET MVC 2 the GET is not allowed because of security issue with JSON hijacking.   6. Next, lets create jQuery AJAX function which will call the GetAuthors method. We will use $.getJSON jQuery method. <script language="javascript" type="text/javascript">     $(function () {         $.getJSON("GetAuthors", "", function (data) {             $("#authorsTemplate").tmpl(data).appendTo("#authorsList");         });     }); </script>   Once the web page is downloaded, the method will be called. The first parameter of $.getJSON() is url string in our case the method name. The second parameter (which in the example is empty string) is the key value pairs that will be send to the server, and the third function is the callback function or the result which is going to be returned from the server. Inside the callback function we have code that renders data with template which has id #authorsTemplate and appends it to element which has #authorsList ID.   7. The jQuery Template <script id="authorsTemplate" type="text/html">     <div id="author">         ${au_lname} ${au_fname}         <div id="address">${address}, ${city}</div>         <div id="contractType">                     {{if contract}}             <font color="green">Has contract with the publishing house</font>         {{else}}             <font color="red">Without contract</font>         {{/if}}         <br />         <em> ${printMessage(state)} </em>         <br />                     </div>     </div> </script> As you can see, I have tags containing fields (au_lname, au_fname… etc.) that corresponds to the table in the EDMX model which is the same as in the database. One more thing to note here is that I have printMessage(state) function which is called inside ${ expression/function/field } tag. The printMessage function <script language="javascript" type="text/javascript">     function printMessage(s) {         if (s=="CA") return "The author is from California";         else return "The author is not from California";     } </script> So, if state is “CA” print “The author is from California” else “The author is not from California”   HERE IS THE COMPLETE ASPX CODE <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">     <title>Database Example :: jQuery Templates</title>     <style type="text/css">         body           {             font-family:Verdana,Arial,Courier New, Sans-Serif;             color:Black;             padding:2px, 2px, 2px, 2px;             background-color:#FF9640;         }         #author         {             display:block;             float:left;             text-decoration:none;             border:1px solid black;             background-color:White;             padding:20px 20px 20px 20px;             margin-top:2px;             margin-right:2px;             font-family:Verdana;             font-size:12px;             width:200px;             height:70px;}         #address           {             font-style:italic;             color:Blue;             font-size:12px;             font-family:Verdana;         }         .author_hover {background-color:Yellow;}     </style>     <script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.4.min.js" type="text/javascript"></script>     <script src="http://ajax.aspnetcdn.com/ajax/jquery.templates/beta1/jquery.tmpl.js" type="text/javascript"></script>     <script language="javascript" type="text/javascript">         function printMessage(s) {             if (s=="CA") return "The author is from California";             else return "The author is not from California";         }     </script>     <script id="authorsTemplate" type="text/html">         <div id="author">             ${au_lname} ${au_fname}             <div id="address">${address}, ${city}</div>             <div id="contractType">                         {{if contract}}                 <font color="green">Has contract with the publishing house</font>             {{else}}                 <font color="red">Without contract</font>             {{/if}}             <br />             <em> ${printMessage(state)} </em>             <br />                         </div>         </div>     </script>     <script language="javascript" type="text/javascript">         $(function () {             $.getJSON("GetAuthors", "", function (data) {                 $("#authorsTemplate").tmpl(data).appendTo("#authorsList");             });         });     </script> </head>     <body>     <div id="title">Pubs Authors</div>     <div id="authorsList"></div> </body> </html> So, in the complete example you also have the CSS style I’m using to stylize the output of my page. Here is print screen of the end result displayed on the web page: You can download the complete source code including examples shown in my previous blog posts about jQuery templates and PPT presentation from my last session I had in the local .NET UG meeting in the following DOWNLOAD LINK. Do let me know your feedback. Regards, Hajan

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  • Change the default Icon on your jQuery UI Accordion

    - by hajan
    I've got this question in one of my previous blogs posted here (the same blog is posted on codeasp.net too), dealing with jQuery UI Accordion and I thought it's nice to recap this in a blog post so that I will have it documented for further reference. In the previous blog, I'm creating tabs content navigation using jQuery UI Accordion. So, it's quite simple code and all I do there is calling accordion() function. <script language="javascript" type="text/javascript">     $(function() {         $("#products").accordion();     }); </script> The default image icons for each item is the arrow. The accordion uses the right arrow and down arrow images. So, what we should do in order to change them? JQuery UI Accordion contains option with name icons that has header and headerSelected properties. We can override them with either the existing classes from jQuery UI themes or with our own. 1. Using existing jQuery UI Theme classes - Open the follownig link: http://jqueryui.com/themeroller/#icons You will see the icons available in the jQuery UI theme. Mouse over on each icon and you will see the class name for each icon. As you can see, each icon has class name constructed in the following way: ui-icon-<name> All icons in one image - In our example, I will use ui-icon-circle-plus  and ui-icon-circle-minus (plus and minus icons). - Lets set the icons <script language="javascript" type="text/javascript">     $(function() {         //initialize accordion                 $("#products").accordion();         //set accordion header options         $("#products").accordion("option", "icons",         { 'header': 'ui-icon-circle-plus', 'headerSelected': 'ui-icon-circle-minus' });     }); </script> From the code above, you can see that I first intialize the accordion plugin, and after I override the default icons with the ui-icon-circle-plyus for header and ui-icon-circle-minus for headerSelected. Here is the end result: So, now you see we have the plus/minus circle icons for the default header state and the selected header state.   2. Add my own icons - If you want to add your own icons, you can do that by creating your own custom css classes. - Lets create classes for both, the header default state and header selected state <style type="text/css">     .defaultIcon     {         background-image: url(images/icons/defaultIcon.png) !important;         width: 25px;         height: 25px;     }     .selectedIcon     {         background-image: url(images/icons/selectedIcon.png) !important;         width: 25px;         height: 25px;     } </style> As you can see, I use my own images placed in images/icons/ folder - default icon - selected icon One very important thing to note here is the !important key added on each background-image property. It's like that in order to give highest importancy to our image so that the default jQuery UI theme icon images will have less importancy and won't be used. And the jQuery code is: <script language="javascript" type="text/javascript">     $(function() {         //initialize accordion                 $("#products").accordion();         //set accordion header options         $("#products").accordion("option", "icons",         { 'header': 'defaultIcon', 'headerSelected': 'selectedIcon' });     }); </script> Note: For both #1 and #2 cases, we use the class names without adding . (dot) at the beginning of the name (as we do with selectors). That's because the the header and headerSelected properties accept classes only as a value, so the rest is done by the plugin itself. The complete code with my own custom images is: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head id="Head1" runat="server">     <title>jQuery Accordion</title>     <link type="text/css" href="http://ajax.microsoft.com/ajax/jquery.ui/1.8.5/themes/blitzer/jquery-ui.css"         rel="Stylesheet" />     <style type="text/css">         .defaultIcon         {             background-image: url(images/icons/defaultIcon.png) !important;             width: 25px;             height: 25px;         }         .selectedIcon         {             background-image: url(images/icons/selectedIcon.png) !important;             width: 25px;             height: 25px;         }     </style>     <script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.4.4.js"></script>     <script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.6/jquery-ui.js"></script>     <script language="javascript" type="text/javascript">         $(function() {             //initialize accordion                         $("#products").accordion();             //set accordion header options             $("#products").accordion("option", "icons",             { 'header': 'defaultIcon', 'headerSelected': 'selectedIcon' });         });             </script> </head> <body>     <form id="form1" runat="server">     <div id="products" style="width: 500px;">         <h3>             <a href="#">                 Product 1</a></h3>         <div>             <p>                 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus in tortor metus,                 a aliquam dui. Mauris euismod lorem eget nulla semper semper. Vestibulum pretium                 rhoncus cursus. Vestibulum rhoncus, magna sit amet fermentum fringilla, nunc nisl                 pellentesque libero, nec commodo libero ipsum a tellus. Maecenas sed varius est.                 Sed vel risus at nisi imperdiet sollicitudin eget ac orci. Duis ac tristique sem.             </p>         </div>         <h3>             <a href="#">                 Product 2</a></h3>         <div>             <p>                 Aliquam pretium scelerisque nisl in malesuada. Proin dictum elementum rutrum. Etiam                 eleifend massa id dui porta tincidunt. Integer sodales nisi nec ligula lacinia tincidunt                 vel in purus. Mauris ultrices velit quis massa dignissim rhoncus. Proin posuere                 convallis euismod. Vestibulum convallis sagittis arcu id faucibus.             </p>         </div>         <h3>             <a href="#">                 Product 3</a></h3>         <div>             <p>                 Quisque quis magna id nibh laoreet condimentum a sed nisl. In hac habitasse platea                 dictumst. Proin sem eros, dignissim sed consequat sit amet, interdum id ante. Ut                 id nisi in ante fermentum accumsan vitae ut est. Morbi tellus enim, convallis ac                 rutrum a, condimentum ut turpis. Proin sit amet pretium felis.             </p>             <ul>                 <li>List item one</li>                 <li>List item two</li>                 <li>List item three</li>             </ul>         </div>     </div>     </form> </body> </html> The end result is: Hope this was helpful. Regards,Hajan

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  • Emit Knowledge - social network for knowledge sharing

    - by hajan
    Emit Knowledge, as the words refer - it's a social network for emitting / sharing knowledge from users by users. Those who can benefit the most out of this network is perhaps all of YOU who have something to share with others and contribute to the knowledge world. I've been closely communicating with the core team of this very, very interesting, brand new social network (with specific purpose!) about the concept, idea and the vision they have for their product and I can say with a lot of confidence that this network has real potential to become something from which we will all benefit. I won't speak much about that and would prefer to give you link and try it yourself - http://www.emitknowledge.com Mainly, through the past few months I've been testing this network and it is getting improved all the time. The user experience is great, you can easily find out what you need and it follows some known patterns that are common for all social networks. They have some real good ideas and plans that are already under development for the next updates of their product. You can do micro blogging or you can do regular normal blogging… it’s up to you, and the way it works, it is seamless. Here is a short Question and Answers (QA) interview I made with the lead of the team, Marijan Nikolovski: 1. Can you please explain us briefly, what is Emit Knowledge? Emit Knowledge is a brand new knowledge based social network, delivering quality content from users to users. We believe that people’s knowledge, experience and professional thoughts compose quality content, worth sharing among millions around the world. Therefore, we created the platform that matches people’s need to share and gain knowledge in the most suitable and comfortable way. Easy to work with, Emit Knowledge lets you to smoothly craft and emit knowledge around the globe. 2. How 'old' is Emit Knowledge? In hamster’s years we are almost five years old start-up :). Just kidding. We’ve released our public beta about three months ago. Our official release date is 27 of June 2012. 3. How did you come up with this idea? Everything started from a simple idea to solve a complex problem. We’ve seen that the social web has become polluted with data and is on the right track to lose its base principles – socialization and common cause. That was our start point. We’ve gathered the team, drew some sketches and started to mind map the idea. After several idea refactoring’s Emit Knowledge was born. 4. Is there any competition out there in the market? Currently we don't have any competitors that share the same cause. What makes our platform different is the ideology that our product promotes and the functionalities that our platform offers for easy socialization based on interests and knowledge sharing. 5. What are the main technologies used to build Emit Knowledge? Emit Knowledge was built on a heterogeneous pallet of technologies. Currently, we have four of separation: UI – Built on ASP.NET MVC3 and Knockout.js; Messaging infrastructure – Build on top of RabbitMQ; Background services – Our in-house solution for job distribution, orchestration and processing; Data storage – Build on top of MongoDB; What are the main reasons you've chosen ASP.NET MVC? Since all of our team members are .NET engineers, the decision was very natural. ASP.NET MVC is the only Microsoft web stack that sticks to the HTTP behavioral standards. It is easy to work with, have a tiny learning curve and everyone who is familiar with the HTTP will understand its architecture and convention without any difficulties. 6. What are the main reasons for choosing ASP.NET MVC? Since all of our team members are .NET engineers, the decision was very natural. ASP.NET MVC is the only Microsoft web stack that sticks to the HTTP behavioral standards. It is easy to work with, have a tiny learning curve and everyone who is familiar with the HTTP will understand its architecture and convention without any difficulties. 7. Did you use some of the latest Microsoft technologies? If yes, which ones? Yes, we like to rock the cutting edge tech house. Currently we are using Microsoft’s latest technologies like ASP.NET MVC, Web API (work in progress) and the best for the last; we are utilizing Windows Azure IaaS to the bone. 8. Can you please tell us shortly, what would be the benefit of regular bloggers in other blogging platforms to join Emit Knowledge? Well, unless you are some of the smoking ace gurus whose blogs are followed by a large number of users, our platform offers knowledge based segregated community equipped with tools that will enable both current and future users to expand their relations and to self-promote in the community based on their activity and knowledge sharing. 10. I see you are working very intensively and there is already integration with some third-party services to make the process of sharing and emitting knowledge easier, which services did you integrate until now and what do you plan do to next? We have “reemit” functionality for internal sharing and we also support external services like: Twitter; LinkedIn; Facebook; For the regular bloggers we have an extra cream, Windows Live Writer support for easy blog posts emitting. 11. What should we expect next? Currently, we are working on a new fancy community feature. This means that we are going to support user groups to be formed. So for all existing communities and user groups out there, wait us a little bit, we are coming for rescue :). One of the top next features they are developing is the Community Feature. It means, if you have your own User Group, Community Group or any other Group on which you and your users are mostly blogging or sharing (emitting) knowledge in various ways, Emit Knowledge as a platform will help you have everything you need to promote your group, make new followers and host all the necessary stuff that you have had need of. I would invite you to try the network and start sharing knowledge in a way that will help you gather new followers and spread your knowledge faster, easier and in a more efficient way! Let’s Emit Knowledge!

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