Question

I’m looking for a regex expression that will add an attribute to an element which already has a attribute with a particular value.

for e.g:

<meta name="stack" />

I want to add an attribute to the meta element which has an attribute name=”stack” such that it will look like

<meta name="stack" value="overflow" />

Also some C# code for match and replace will help.

I cannot use XmlDocument or HtmlAgilityPack due to malformed xml in input.

Thanks.

Answer 1

(<\s*meta\s+name\s*=\s*"stack")(\s*/>)

replace with

$1 value="overflow" $2