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EXTENDING DREAMWEAVER CS4

Server behaviors

Values

The value is a regular expression that finds a parameter between two parenthetical subexpressions, in the form /(pre-

pattern)parameter-pattern(post-pattern)/. You need to define at least one update pattern for each unique

@@paramName@@ in the insertion text. The following example shows how your insertion text might look:

<![CDATA[<%= @@rs@@.Field.Items("@@col@@") %>]]>

</insertText>

A particular instance of the insertion text on a page might look like the following example:

<%= RS1.Field.Items("author_id") %>

There are two parameters, rs and col. To update this text after you insert it on the page, you need two update pattern

definitions:

/(\b)\w+(\.Field\.Items)/

</updatePattern>

/(\bItems\(")\w+("\))/

</updatePattern>

The literal parentheses, as well as other special regular expression characters, are escaped by preceding them with a

backslash (\). The middle expression, defined as

\w+, is updated with the latest value that passed in for parameters rs

and

col, respectively. The values RS1 and author_id can be precisely updated with new values.

Multiple occurrences of the same pattern can be updated simultaneously by using the regular expression global flag g

after the closing slash (such as /pattern/g).

If the participant text is long and complex, you might need multiple patterns to update a single parameter, as shown

in the following example:

<% ...

Recordset1.CursorType = 0;

Recordset1.CursorLocation = 2;

Recordset1.LockType = 3;

To update the recordset name in all three positions, you need three update patterns for a single parameter, as shown

in the following example:

/(\b)\w+(\.CursorType)/

</updatePattern>

/(\b)\w+(\.CursorLocation)/

</updatePattern>

/(\b)\w+(\.LockType)/

</updatePattern>

Now you can pass in a new value for the recordset, and it is precisely updated in three locations.

<updatePattern> attributes

The following items are valid attributes of the updatePattern tag.

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Adobe Extending Dreamweaver CS4 Manuale Utente Pagina 281