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Use MvcContrib Grid to Display a Grid of Data in ASP.NET MVC
The past six articles in this series have looked at how to display a grid of data in an ASP.NET MVC application and how to implement features like sorting, paging,
and filtering. In each of these past six tutorials we were responsible for generating the rendered markup for the grid. Our Views included the
<table> tags, the <th> elements for the header row, and a foreach loop that emitted a series of
<td> elements for each row to display in the grid. While this approach certainly works, it does lead to a bit of repetition and inflates the size
of our Views.
The ASP.NET MVC framework includes an HtmlHelper class that adds support
for rendering HTML elements in a View. An instance of this class is available through the Html object, and is often used in a View to create action links
(Html.ActionLink), textboxes (Html.TextBoxFor), and other HTML content. Such content could certainly be created by writing the markup by hand
in the View; however, the HtmlHelper makes things easier by offering methods that emit common markup patterns. You can even
create your own custom HTML Helpers by adding
extension methods to the HtmlHelper class.
MvcContrib is a popular, open source project that adds various functionality to the ASP.NET MVC framework. This includes
a very versatile Grid HTML Helper that provides a strongly-typed way to construct a grid in your
Views. Using MvcContrib's Grid HTML Helper you can ditch the <table>, <tr>, and <td> markup, and instead use
syntax like Html.Grid(...). This article looks at using the MvcContrib Grid to display a grid of data in an ASP.NET MVC application. A future installment
will show how to configure the MvcContrib Grid to support both sorting and paging.
Displaying a Paged Grid of Data in ASP.NET MVC
This article demonstrates how to display a paged grid of data in an ASP.NET MVC application and builds upon the work done in two earlier articles: Displaying a Grid of Data in ASP.NET MVC and Sorting a Grid of Data in ASP.NET MVC. Displaying a Grid of Data in ASP.NET MVC started with creating a new ASP.NET MVC application in Visual Studio, then added the Northwind database to the project and showed how to use Microsoft's Linq-to-SQL tool to access data from the database. The article then looked at creating a Controller and View for displaying a list of product information (the Model).
Sorting a Grid of Data in ASP.NET MVC enhanced the application by adding a view-specific Model (ProductGridModel) that provided the View with
the sorted collection of products to display along with sort-related information, such as the name of the database column the products were sorted by and whether the
products were sorted in ascending or descending order. The Sorting a Grid of Data in ASP.NET MVC article also walked through creating a partial view to
render the grid's header row so that each column header was a link that, when clicked, sorted the grid by that column.
In this article we enhance the view-specific Model (ProductGridModel) to include paging-related information to include the current page being viewed,
how many records to show per page, and how many total records are being paged through. Next, we create an action in the Controller that efficiently retrieves the
appropriate subset of records to display and then complete the exercise by building a View that displays the subset of records and includes a paging interface that
allows the user to step to the next or previous page, or to jump to a particular page number, we create and use a partial view that displays a numeric paging interface
Like with its predecessors, this article offers step-by-step instructions and includes a complete, working demo available for download at the end of the article. Read on to learn more!
Filtering a Grid of Data in ASP.NET MVC
This article is the fourth installment in an ongoing series on displaying a grid of data in an ASP.NET MVC application. The previous two articles in this series - Sorting a Grid of Data in ASP.NET MVC and Displaying a Paged Grid of Data in ASP.NET MVC - showed how to sort and page data in a grid. This article explores how to present a filtering interface to the user and then only show those records that conform to the filtering criteria.
In particular, the demo we examine in this installment presents an interface with three filtering criteria: the category, minimum price, and whether to omit discontinued products. Using this interface the user can apply one or more of these criteria, allowing a variety of filtered displays. For example, the user could opt to view: all products in the Condiments category; those products in the Confections category that cost $50.00 or more; all products that cost $25.00 or more and are not discontinued; or any other such combination.
Like with its predecessors, this article offers step-by-step instructions and includes a complete, working demo available for download at the end of the article. Read on to learn more!
Sorting a Grid of Data in ASP.NET MVC
Last week's article, Displaying a Grid of Data in ASP.NET MVC, showed, step-by-step, how to display a grid of data in an ASP.NET MVC application. Last week's article started with creating a new ASP.NET MVC application in Visual Studio, then added the Northwind database to the project and showed how to use Microsoft's Linq-to-SQL tool to access data from the database. The article then looked at creating a Controller and View for displaying a list of product information (the Model).
This article builds on the demo application created in Displaying a Grid of Data in ASP.NET MVC, enhancing the grid to include bi-directional sorting. If you come from an ASP.NET WebForms background, you know that the GridView control makes implementing sorting as easy as ticking a checkbox. Unfortunately, implementing sorting in ASP.NET MVC involves a bit more work than simply checking a checkbox, but the quantity of work isn't significantly greater and with ASP.NET MVC we have more control over the grid and sorting interface's layout and markup, as well as the mechanism through which sorting is implemented. With the GridView control, sorting is handled through form postbacks with the sorting parameters - what column to sort by and whether to sort in ascending or descending order - being submitted as hidden form fields. In this article we'll use querystring parameters to indicate the sorting parameters, which means a particular sort order can be indexed by search engines, bookmarked, emailed to a colleague, and so on - things that are not possible with the GridView's built-in sorting capabilities.
Like with its predecessor, this article offers step-by-step instructions and includes a complete, working demo available for download at the end of the article. Read on to learn more!
Implementing the Store Locator Application Using ASP.NET MVC (Part 2)
Last week's article, Implementing the Store Locator Application Using ASP.NET MVC (Part 1), started
a two-part article series that walked through converting my ASP.NET store locator application from
WebForms to ASP.NET MVC. Last week's article stepped through the first tasks in porting the store locator application to ASP.NET MVC, including: creating the new
project; copying over stylesheets, the database, scripts, and other shared content from the WebForms application; building the HomeController; and coding
the Index and StoreLocator actions and views.
Recall that the StoreLocator action and view prompts the user to enter an address for which to find nearby stores. On form submission, the action interfaces
with the Google Maps API's geocoding service to determine if the entered address corresponds to known latitude and
longitude coordinates. If so, the user is redirected to the StoreLocatorResults action (which we create in this article) that displays the nearby stores in
both a grid and as markers on a map. Unlike the StoreLocator action created in Part 1, the StoreLocatorResults action uses a more intricate
model and a strongly-typed view.
Updating My Online Boggle Solver Using jQuery Templates and WCF
With WebForms, each ASP.NET page's rendered output includes a <form> element that performs a postback to the same page whenever a Button
control within the form is clicked, or whenever the user modifies a control whose AutoPostBack property is set to True. This model simplifies web page
development, but carries with it some costs - namely, the large amount of data exchanged between the client and the server during a postback. On postback the browser sends
the values of all of its form fields (including hidden ones, like view state, which may be quite large) to the server; the server then sends back the entire contents of
the web page. While there are some scenarios where this amount of information needs to be exchanged, in many cases the user has performed some action that requires
far less information to be exchanged. With a little bit of forethought and code we can have the browser and server exchange much less data, which leads to more
responsive web pages and an improved user experience.
Over the past several weeks I've been writing an article series on accessing server-side data from client script. Rather than rely solely on forms and postbacks, many websites use JavaScript code to asynchronously communicate with the server in response to the page loading or some other user action. The server, upon receiving the JavaScript-initiated request, returns just the data needed by the browser, which the browser then seamlessly integrates into the web page. There are a variety of technologies and techniques that can be employed to provide both the needed server- and client-side functionality. Last week's article, Using WCF Services with jQuery and the ASP.NET Ajax Library, explored using the Windows Communication Foundation, or WCF, to serve data from the web server and showed how to consume such a service using both the ASP.NET Ajax Library and jQuery.
In a previous 4Guys article, Creating an Online Boggle Solver, I built an application to find all solutions in a game of Boggle. (Boggle is a word game trademarked by Parker Brothers and Hasbro that involves several players trying to find as many words as they can in a 4x4 grid of letters.) This article takes the lessons learned in Using WCF Services with jQuery and the ASP.NET Ajax Library and uses them to update the user interface for my online Boggle solver, replacing the existing WebForms-based user interface with a more modern and responsive interface. I also used jQuery Templates, a JavaScript-based templating library that is useful for displaying the results from a server-side service.


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