xpath Max DateTime

Question

I'm having a problem with xpath query. I have a schema with two DateTime fields and I need the Max Datetime from all the records in the schema.

this is my Xpath:

xPath_a = "max(/libary/DateTime1)";

any suggestion about how to make it work in Xpath?

Answer 1

Unfortunately, the version of XPath and Xslt supported in .Net still 1.0 so that's what BizTalk uses.

XPath 1.0 does not have a max() function.

Since the syntax you posted suggests an Orchestration, the most practical option is a helper class that takes message as a XmlDocument parameter.

This thread has an example of hot to use an XPathDocument and an XmlDocument: http://social.msdn.microsoft.com/Forums/en-US/e6addfe7-c94f-495b-9e79-35c48844b33f/select-max-value-from-xml-file?forum=xmlandnetfx

This thread provides examples of using XDocument and LINQ: Get max attribute value from XML using LINQ