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Chapter 10: Regular Expressions
<body>
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<form id="form1" runat="server">
ASP.NET Start Tag
<div>
ASP.NET Start Tag
<asp:Login ID="Login1" runat="server">
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</asp:Login>
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</div>
ASP.NET End Tag
</form>
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</body>
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</html>
Discussion
There are 15 classes within the System.Web.RegularExpressions namespace that give
you the ability to parse existing aspx pages and HTML pages as well as other types of
web pages. You can even parse XML to some extent. Each of these classes inherits
from the
System.Text.RegularExpressions.Regex class. What makes these classes
unique is that each contains one regular expression that allows them to parse differ-
ent aspects of a web page. For example, the
CommentRegex class contains the follow-
ing regular expressions:
\G<%--(([^-]*)-)*?-%>
which look for a comment within a web page in the following format:
<%-- this is a comment -->
Table 10-1 lists each class and its associated regular expression along with its
description.
Table 10-1. Descriptions of the System.Web.RegularExpressions classes
Class name Regular expression Description
AspCodeRegex
\G<%(?!@)(?<code>.*?)%> Parses a code block of the form
<% code %>.
AspExprRegex
\G<%\s*?=(?<code>.*?)?%> Parses an expression block of the form
<%= expression ...