Applied XML Programming for Microsoft .NET.pdf - Csbdu.in

Supported languages are C#, Visual Basic, and JScript. The language attribute is notmandatory and, if not specified, defaults to JScript. The implements-prefix attribute ismandatory, however. It declares a namespace and associates the user-defined codewith it. The namespace must be defined somewhere in the style sheet. In addition, tomake use of the instruction, the style sheet must include the followingnamespace:xmlns:msxsl=urn:schemas-microsoft-com:xsltLet's see how to define a simple script. To start off, we'll declare the extra namespacesin the the style sheet's root node, as shown here:This declaration is necessary to be able to call the instruction. Thenamespace simply groups under a single roof some user-defined scripts. The prefixdino is now necessary to qualify any calls to any functions defined in a block. Script blocks can be defined as children of the node, at the samelevel as templates.The following script concatenates first and last names, separated by a comma:public string PrepareName(string last, string first){return last + ", "+ first;}In the body of the style sheet—typically in a template—you call the function, as follows:If you enclose parameters in quotation marks, they will be treated as literals. To ensurethat the function receives only node values, use the same expressions you would usewith the select attribute of an instruction. The preceding script runs fromthe context of a node in the following schema:......276