Home > Articles > Programming > Windows Programming

  • Print
  • + Share This
This chapter is from the book

ASP .NET Projects

Now we get to the point where Visual Studio .NET really shines in comparison to previous versions. Previously, to develop a web application with Visual Studio tools, you had to jump between Visual Interdev, FrontPage, and VB, depending on the type of web application you were building. You used Visual Interdev to build client-side web applications, FrontPage for static pages, and VB to develop web classes and server-side components. Each tool had its strengths and weaknesses. All that is history with Visual Studio.NET. There are no longer separate tools required to develop web applications. The process for developing a server-side web application is now as close as it gets to the process for developing a standard Windows application. Let's create a simple application to demonstrate what we mean.

Before we begin, let's make sure we have all of the requirements in place to create a web application. If you did a full install of Visual Studio.NET Professional or higher you should be all right, but let's make sure.

  • You need to have Internet Information Server (IIS) 5.0 installed. This is installed with Windows 2000 or XP Pro. If you are running Windows NT 4.0, you should check the version. Visual Studio should have updated it if it detected that it was out of date.

  • The IIS service must be started on Port 80.

  • Make sure some other product did not install another web server, such as Apache. On Windows XP, you will not receive an error when two services try to use the same port (80). The first service to start gets the port. On WinNT 4 and 2000, you will receive a message in the event log if another application tries to start on a port already in use. If another product is using Port 80, you will have to stop that service to use IIS. Also, make sure you change the service's startup method to manual.

  • IIS needs to be updated with Microsoft ASP.NET files (ASPX) extensions. Again the Visual Studio install should have installed these. To check, open the Management Console (right-click on My Computer and select Manage), expand the Internet Information Services node, expand Web Sites, right-click on Default Web Site, and select Properties. Select the Home Directory tab and then click the Configuration… button on the lower half of the form. You should see something like that shown in Figure 3.9.

    Figure 3.9Figure 3.9. ISAPI mappings for ASP.NET applications.

Notice all the references to .NET. If you do not see any of these you may have to reconfigure your machine. The Visual Studio Installer should do this for you.

Once you are sure all of the prerequisites are met, you can create your project. Close any projects that are open. Select New Project and when the dialog opens select ASP.NET Web Application. Change the name of the project to ADOBook03-03. and click OK. The first thing different you will notice is that Visual Studio contacts the web site. This is because Visual Studio keeps the project on the IIS server. If this is your local machine the default path is C:\InetPub\WWWRoot\ADOBook03-03. If the web site is on a server, then the files are located there. The Project Explorer should look like Figure 3.10, with the References node expanded.

Figure 3.10Figure 3.10. A new ASP.NET project.

Things to notice:

  • References— Notice the reference to System.Web. This library contains all of the classes for building a web application.

  • ADOBook03-03.vsdisco— This is the Web Services discovery document. This document is used for Universal Description, Discovery and Integration (UDDI) directory services. These services help users find Web Services and provide a standard for their discovery. It is like a search engine for Web Services.

  • Web.config— This document contains application configuration information, in a similar manner to an ini file.

If you open the vsdisco or web.config files, you will see that they are Extensible Markup Language (XML) files. That is after all what Web Services are all about. The saying for .NET is "If you can't tell, assume it's XML!"

Now comes the real neat part. Let's add a button to our new Web Form. Roll out the toolbox. Now, instead of the Windows controls, we see Web Form controls. Drag and drop a button onto the form. By default, the form uses absolute positioning for elements, meaning elements are fixed and cannot move around by themselves when the user resizes the browser window. You can use flow positioning as well. With this mode the elements will repaginate when the user resizes the window. Since we are designing forms, we will stay with absolute positioning. If the user's browser window is too small to contain the full form, scroll bars will appear to let the user expose the rest of the form.

Now let's also add a label to inform our user of the application's purpose. Drop a label control on the form. Change the text property of the label to read Say Hello World Application. Change the button's text property to read Say Hello. Position the controls as shown in Figure 3.11.

Figure 3.11Figure 3.11. The top of the Web Form.


When designing Web Forms, keep the targeted users in mind. If you have the ability to require a minimum screen resolution (800x600 for example) then you should design your form with this in mind. If you will have no control over your user's machine. then you should design your form to a minimum standard of 640*480 so anyone will have a positive experience. Studies have shown that the user's experience counts most for the success of any application, no matter how elegant the underlying code is.

Create a Web Form. Change the pageLayout property of this form to FlowLayout. Now you can type directly on the page. In fact, you have all of the design features of FrontPage right in the IDE! Drop down the style list and select Heading 1. Type Hello World directly on the page. Also, drop another button onto the page. Change its text to Back. Just for fun, click on the HTML tab at the bottom of the design window. You will see that it is pretty normal HTML. ASP.NET applications by default generate standard HTML so the forms will run on any browser.

In WebForm1, double-click the button. A code window will open and a click event procedure will appear. In the body of the click event, enter this code:


Now do the same thing with WebForm2 except enter WebForm1 in the line of code. Now comes the good part. Click the Run button. As expected the program compiles, but instead of running as a Windows application a browser window opens and the WebForm1 appears. Pull down the View menu and select Source. Look at the HTML. It is very basic HTML. Click the Say Hello button. WebForm2 appears. Click the Go Back button and WebForm1 reappears. To end the application, close the browser window. All of the processing occurs on the server so the page will render properly in any browser. Just to try this out, I accessed the page from a Linux box I have running the KDE X-Windows environment. It uses a browser called Konquerer. (It's supposed to be a sly dig on Explorer, I think.) It's not Netscape, Internet Explorer (IE), or any well-known browser. The application worked just fine.

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020