Visual Basic Internet Applications

Visual Basic Internet technology takes the process one step further by allowing you to link standard Visual Basic code to a user interface of HTML pages. This provides an extremely powerful mechanism for associating programming functionality with your Web pages, while allowing you to create dynamic, interactive content. With Visual Basic Internet technology, you can perform complex business operations while avoiding some of the intricacies of gateway programming or scripting. You can also enjoy all the benefits of working in Visual Basic, such as using class modules, controls, and designers, and debugging your code.

There are two main types of Visual Basic Internet applications: IIS applications and DHTML applications:

IIS applications, named for Microsoft Internet Information Server, reside on a Web server and are used to process incoming requests from a browser. IIS applications process the requests, run associated Visual Basic code, and return responses to the user. All processing for an IIS application happens on the server.

DHTML applications, named for, let you write Visual Basic code that handles events on any element of an HTML page. Most processing in a DHTML application can happen on the browser computer, although the application can make calls to the server if necessary.

DHTML applications require the end user to have Microsoft Internet Explorer version 4.0 or later, while IIS applications are browser- and operating system – independent to the end user. Because of this, IIS applications are the appropriate choice when you want to develop an application that reaches a broad audience. DHTML applications may be the more appropriate choice for intranet applications or applications that need to support remote or offline usage.

There are also other types of applications you can create in Visual Basic that make use of the Internet. For example, you can create ActiveX components that can be used on the Internet. These include ActiveX controls that can be used on Web pages, ActiveX documents that can run in a browser, and ActiveX code components that can be deployed on a Web server for behind-the-scenes processing. In addition, you can use the WebBrowser control to use HTML pages within a forms-based application.

Date: 2016-05-25; view: 415; Нарушение авторских прав