Question

I want to change this below using Regular Expression

<script type="text/javascript" language="javascript" src="/Common/Scripts/UserControls/Form.js"></script>

<script type="text/javascript" language="javascript" src="<%=VirtualPathUtility.ToAbsolute("~/Common/Scripts/UserControls/Form.js")%>></script>

Answer 1

You can try the following:

Find:

\<script type\=\"text\/javascript\" language\=\"javascript\" src="{[^"]+}"\>\<\/script\>

Replace:

<script type="text/javascript" language="javascript" src="<%=VirtualPathUtility.ToAbsolute("~\1")%>></script>

The key things to note:

• You can match an expression for use in the replace section with braces {}. I use [^"]+ to capture all characters between the quotes – the [] matches a set of characters, where ^ means “not” – so [^"] matches anything except a quote. Then + means match one or more (non-quote characters).
• Some characters have special meaning, so you can escape them with \. You can safely escape most chracters that don’t have meaning if you put an extra \ unnecessarily in front of them, so I am overzealous just to be safe.
• Use \1, \2, \3, etc. to use captured groups in the replace expression. So I’m using \1 to refer to the src attribute value matched in the find.