Regex for matching quotes and single quotes

I'm currently writing a parser for ColdFusion code. I'm using a regex (in c#) to extract the name datasource attribute of the cfquery tag.

For the time being the regex is the following <cfquery\s.*datasource\s*=\s*(?:'|")(.*)(?:'|")

it works well for strings like <cfquery datasource="myDS" or <cfquery datasource='myDS'

But it gets crazy when parsing strings like <cfquery datasource="#GetSourceName('myDS')#"

Obviously the part of the regex (?:'|") is the cause. Is there a way to only match single quote when the first match was a single quote? And only match the double quote when the first match was a double quote?

Thanks in advance!