Welcome!

Microsoft Cloud Authors: David Bermingham, Dana Gardner, Yung Chou, Jayaram Krishnaswamy, Pat Romanski

Related Topics: Microsoft Cloud

Microsoft Cloud: Article

Implementing Tab Navigation with ASP.NET 2.0

Using MasterPages, a SiteMapDataSource, and the Menu control

One of the most basic ways to navigate within an application is by use of a tab control. Tabs are easy to use and users are very familiar with them. There have been many implementations of tab controls for Web applications, but they had often required advanced client-side script that was only supported in a few browsers, or they required extensive and confusing server-side include files. ASP.NET 2.0 provides a few things that make this easier to do with no dependency on functional code. In this article I'll show you how you can use the new features of ASP.NET 2.0 to easily create a tab control for your Web application.

To get started, create a new Web site (use your favorite language) on your computer and call it TabDemo. ASP.NET 2.0 introduces a new set of data providers and controls based on the notion of a site map. The site map is the central data store for site navigation data. Let's start by defining a simple site map that we can use for our site. Add a new sitemap to the site (use the default name of Web.sitemap). Listing 1 shows a simple sitemap that will demonstrate the tabs nicely.

Now that we have our sitemap, we can continue with the actual user interface. To get the most benefit from the tab control, we'll use a master page to keep everything together. Add a new master page to your Web site and call it MasterPage.master (see Figure 1).

In order to make our tabs seem as though they're physically connected to our content, we'll need to create a master HTML table to contain the tabs. Delete the code between the <form> and </form> tags in the MasterPage.master file and replace it with the HTML in Listing 2.

That will give us the main table that will hold all of our content (including our tab control). Now we need to define the table that actually holds our tabs and the tab "panels." Let's take a look at Listing 3. It shows the HTML that we should put into the TD with the ID of ContentContainer.

Notice the use of the TD with the CSS class TabMenuSpacer. This cell forces the empty area behind the tabs to take up all of the excess space to the right of the menu. We need to add the SiteMapDataSource to our page so that the menu will be bound to our site map. This is easy to do. Simply add the following code just below the main table:


<asp:SiteMapDataSource ID="TabMenuSitemap" runat="server" ShowStartingNode="false" />

This adds a new SiteMapData-Source to the page. Since we used the default name of Web.sitemap for our site map, ASP.NET will automatically use it as the main site map for the site, so we don't have to do anything else. If you add another site map to the site, you'll need to define a new site map provider to the web.config file that points to your new site map, and then set the SiteMapProvider property of the SiteMapDataSource to your new site map provider. It's also important to point out that we set the ShowStartingNode property to false. We did this because we have a flat site map and we don't want to show the top-most parent node for our menu (since the site map is defined in XML, we had to have a root node, even though we'll never use it).

Let's go ahead and take a look at what we have so far. Delete the Default.aspx page that Visual Studio added to your site and replace it with a new Default.aspx page. This time, when you add the page, check the box labeled "Select master page." Then select MasterPage.master as the master page. Build and run the Web application. At this point, you'll see a very simple page that doesn't look like a whole lot (see Figure 2).

The reason our page looks so odd is because we haven't yet defined the Cascading Style Sheet for the page. We need to add the CSS that will actually render what we have as a Tab menu. Add a new style sheet to your project and name it Stylesheet.css. Then, add the following to the <head> of MasterPage.master:


<link href="StyleSheet.css" rel="stylesheet" type="text/css" />

This will link in the new style sheet. Let's take a look at the individual styles that make up our tab control. We'll start with the CSS class named TabMenuContainer. This style is applied to the entire tab menu. We just need to make sure that we have a top border so that our menu has a lid on it.


.TabMenuContainer
{
border-top: solid 1px black;
}

The next style that we're concerned with is the TabMenuItem. This is the style that is applied to all of our tabs in their unselected state.


.TabMenuItem
{
background-color: #FFFFBC;
text-align:center;
font-size: xx-small;
border: solid 1px black;
border-left: none;
padding: 3px 3px 3px 3px;
}

Notice that we've defined a border with a single pixel black line. We then set the left border to be nothing. This is actually an intentional move that prevents the tabs from looking bad against the border of the main container.

The secret to this whole method is in the next style. This is the style that is applied to the selected menu item:


..TabMenuItemSelected
{
background-color: White;
text-align:center;
font-size: xx-small;
border-right: solid 1px black;
border-bottom: none;
border-top: none;
border-left: none;
padding: 5px 3px 5px 3px;
}

We set the bottom border to "none" and the background color to white. This will allow the tab to look as if it is attached to the content cell. We also set the top border to "none" to give the selected tab just a little more height than the other tabs.

Since we want our tab panels (the cell that contains the Content-PlaceHolder control) to be the same height from page to page, we should set them to be a specific height. Once again, we use CSS to define a style to do this. In the HTML for the master page we added a table cell to the right of the content container and set its CSS class to SiteContentSpacer. Let's set the style for that to be a specific height.


.SiteContentSpacer
{
height: 200px;
visibility: hidden;
}

Not only did we set the height of the content to 200 pixels (a very small number just for demonstration purposes), but we also made the cell invisible. Listing 4 shows the entire style sheet that contains all of the styles used to make our tab control demo.

Once we've added the remaining styles to the style sheet, we can take a look at the final product. Figure 3 shows a screenshot of the resulting page with our tab control and all of the styles defined.

The tab control is a very useful user interface element that is common to many applications. With the introduction of master pages, SiteMapDataSource, and the menu control in ASP.NET 2.0, creating tabs in Web applications is easy. Best of all, once you have the master page set up for tabs, all you have to do to use them is to set the master page on your new Web forms and edit the page as you normally would. Also, since the solution relies on CSS, these tabs work in the latest Web browsers without any client-side coding.

Comments (10) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Aravind 05/06/08 09:09:19 AM EDT

Great work, Thank you so much.

Tony 04/02/08 04:22:56 PM EDT

Thank you very much, I have been looking for a nice simple way to do this. Awesome article.

Pranoti 03/07/08 03:18:06 PM EST

Thank your very much, your tutorial helped me a lot

Saurabh 01/28/08 10:49:37 PM EST

It's really awesome. It really works. Thanks a lot. Really nice article.

Aseem 12/20/07 06:07:54 AM EST

Thanks for the easy to follow instructions in the article. How do we add a second layer to our tab navigation? IE when you click on one tab, the subtabs for that tab appear. Any help would be great also I need it urgently. Please help it out.
Also i m getting a error "object required" when taking my mouse on any of the tabs, bt is working fine.
Thanks

Dave 11/26/07 02:05:38 PM EST

Thanks for the easy to follow instructions in the article. How do we add a second layer to our tab navigation? IE when you click on one tab, the subtabs for that tab appear. Any help would be great.

AK 11/16/07 04:51:45 PM EST

Great! Worked really good for me first time, may have to make a dummies version for the less experienced...

Rob 08/08/07 06:19:13 PM EDT

Thanks for sharing that. Instructions were great and it all worked first time. I'm used to the tab control in Access and its good to have it in asp.net

ChuckO 06/14/07 03:39:41 PM EDT

The information in this article is not all correct. I followed his instructions and get the following error.

Content controls have to be top-level controls in a content page or a nested master page that references a master page.

John Bowyer 12/30/05 03:35:37 AM EST

I have implemented the tab control as documented to the best of my ability and it appears to have missing ingredients from the article.

When I select a tab, it does not highlight. In short it does not look like a tab at all. I also have dynamic mouse flyouts.

The article specifies as a class: TabMenu that is not inclided in Listing 1.

@ThingsExpo Stories
Join us at Cloud Expo | @ThingsExpo 2016 – June 7-9 at the Javits Center in New York City and November 1-3 at the Santa Clara Convention Center in Santa Clara, CA – and deliver your unique message in a way that is striking and unforgettable by taking advantage of SYS-CON's unmatched high-impact, result-driven event / media packages.
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
Silver Spring Networks, Inc. (NYSE: SSNI) extended its Internet of Things technology platform with performance enhancements to Gen5 – its fifth generation critical infrastructure networking platform. Already delivering nearly 23 million devices on five continents as one of the leading networking providers in the market, Silver Spring announced it is doubling the maximum speed of its Gen5 network to up to 2.4 Mbps, increasing computational performance by 10x, supporting simultaneous mesh communic...
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
One of the bewildering things about DevOps is integrating the massive toolchain including the dozens of new tools that seem to crop up every year. Part of DevOps is Continuous Delivery and having a complex toolchain can add additional integration and setup to your developer environment. In his session at @DevOpsSummit at 18th Cloud Expo, Miko Matsumura, Chief Marketing Officer of Gradle Inc., will discuss which tools to use in a developer stack, how to provision the toolchain to minimize onboa...
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
There will be new vendors providing applications, middleware, and connected devices to support the thriving IoT ecosystem. This essentially means that electronic device manufacturers will also be in the software business. Many will be new to building embedded software or robust software. This creates an increased importance on software quality, particularly within the Industrial Internet of Things where business-critical applications are becoming dependent on products controlled by software. Qua...
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Avere delivers a more modern architectural approach to storage that doesn’t require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbuilding of data centers ...
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
Fortunately, meaningful and tangible business cases for IoT are plentiful in a broad array of industries and vertical markets. These range from simple warranty cost reduction for capital intensive assets, to minimizing downtime for vital business tools, to creating feedback loops improving product design, to improving and enhancing enterprise customer experiences. All of these business cases, which will be briefly explored in this session, hinge on cost effectively extracting relevant data from ...
SYS-CON Events announced today that iDevices®, the preeminent brand in the connected home industry, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. iDevices, the preeminent brand in the connected home industry, has a growing line of HomeKit-enabled products available at the largest retailers worldwide. Through the “Designed with iDevices” co-development program and its custom-built IoT Cloud Infrastruc...
The Quantified Economy represents the total global addressable market (TAM) for IoT that, according to a recent IDC report, will grow to an unprecedented $1.3 trillion by 2019. With this the third wave of the Internet-global proliferation of connected devices, appliances and sensors is poised to take off in 2016. In his session at @ThingsExpo, David McLauchlan, CEO and co-founder of Buddy Platform, will discuss how the ability to access and analyze the massive volume of streaming data from mil...
WebSocket is effectively a persistent and fat pipe that is compatible with a standard web infrastructure; a "TCP for the Web." If you think of WebSocket in this light, there are other more hugely interesting applications of WebSocket than just simply sending data to a browser. In his session at 18th Cloud Expo, Frank Greco, Director of Technology for Kaazing Corporation, will compare other modern web connectivity methods such as HTTP/2, HTTP Streaming, Server-Sent Events and new W3C event APIs ...
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts...