Adobe ColdFusion 9 Web Application Construction Kit: by Ben Forta

By Ben Forta

Written via the simplest recognized and so much depended on identify within the ColdFusion neighborhood, Ben Forta, The ColdFusion net program development equipment is the best-selling ColdFusion sequence of all time - the books that the majority ColdFusion builders used to benefit the product. This moment quantity of the sequence starts via introducing very important code association and administration recommendations, after which progresses to subject matters that come with integrating with every kind of different applied sciences (including PDF, Adobe Flex and knowledge companies, Ajax, complex SQL and databases, ORM), debugging, and optimizing functionality. From layout and making plans, to software deployment and troubleshooting, this tutorial reference is all you must effectively paintings, create, and development with ColdFusion nine. whole assurance of ColdFusion nine is incorporated in "Volume 1, Getting began" (0-321-66034-X) and "Volume three, complicated program improvement" (0-321-67920-2).

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Extra resources for Adobe ColdFusion 9 Web Application Construction Kit: Application Development, Volume 2

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You can also write your own CFX tags. You can write the code to make the tag do its work in either Java or C++. For more information about writing CFX tags, see the ColdFusion 9 documentation. note If you wish, you can also extend ColdFusion 9 by writing JSP tag libraries, COM/ActiveX controls, Java classes or JavaBeans, and more. The list above simply summarizes the extensibility methods specific to ColdFusion. In this chapter, I will concentrate on the first option, user-defined functions. I recommend that you also read Chapters 23 and 24 so that you know the extensibility options available to you.

That said, a (or several tags) would work equally well. The code might just be a bit harder to follow. Within the block, the basic idea is to generate a normal HTML tag, with a normal href attribute. In addition to the href attribute, the tag is also given onclick, onmouseover, and onmouseout attributes. These attributes contain JavaScript code that will execute when the user clicks the link, hovers over the link, and hovers away from the link, respectively.

3 Tag Syntax reTUrn VAlUe PUrPose (any expression) The tag doesn’t have any attributes per se. Instead, you place whatever string, number, date, variable, or other expression you want directly within the tag. For instance, if you wanted your function to always return the letter A, you would use If you wanted your function to return the current time, you would use You can use complex expressions as well, like this: Using Local Variables To get its work done, a UDF often needs to use or other tags that create variables.

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