Summary
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Object-oriented programming has evolved to where objects can be stored on a central object server so that various applications can share and use the services of those objects. This architecture is very beneficial because it allows for centralized object management. However, distributed object technologies such as DCOM, CORBA, and RMI do not communicate with one another, meaning that object sharing is available only if you are using the same platform.
The web standards have evolved to allow objects to be shared, no matter which operating system or platform they were written in. These standards include XML as a standard way of representing data; SOAP, a defined set of XML elements and attributes that specifies which methods to run on a remote server; and WSDL, a defined set of XML elements and attributes that allows a client to discover what methods are available on the remote sever and how to call them.
With Visual Studio .NET, Crystal Reports allows a Crystal report to be published as a web service by simply adding the report to a web service project and choosing to publish the report from a menu. Any client who uses a Crystal Report Viewer can set the report source to be the Crystal web service and view the report.
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EAN: 2147483647
Pages: 217