Building Web applications using InternetExpress

MIDAS clients can request that the application server provide data packets that are coded in XML instead of OleVariants. By combining XML-coded data packets, specialjavascript libraries of database functions, and C++Builder’s Web server application support, you can create thin client applications that can be accessed using a Web browser that supports javascript. These applications make up C++Builder’s InternetExpress support.

Before building an InternetExpress application,, you should understand C++Builder’s Web server application architecture and the MIDAS database architecture.Understanding MIDAS technology.

On the InternetExpress page of the component palette, you can find a set of components that extend this Web server application architecture to act as a MIDAS client. Using these components, the Web application generates HTML pages that contain a mixture of HTML, XML, and javascript. The HTML governs the layout and appearance of the pages seen by end users in their browsers. The XML encodes the data packets and delta packets that represent database information. The javascript allows the HTML controls to interpret and manipulate the data in these XML data packets.

If the InternetExpress application uses DCOM to connect to the application server, you must take additional steps to ensure that the application servergrants access and launch permissions to its clients.

Tip:You can use the components on the InternetExpress page to build Web server applications with “live” data even if you do not have an application server. Simply add the provider and its dataset to the Web module.

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