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Asked: 2026-05-11T09:51:40+00:00

I’m planning to do a relatively large XPath query using msxml. Is there a

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I’m planning to do a relatively large XPath query using msxml. Is there a maximum length for a query that msxml enforces?

Background: From some external input my code will create a number of xpath-queries and I am interested in the result of all those or-ed together:

   myObject.SelectNodes(subQuery1 +'|'+ subQuery2 +'|' + subQuery3 + '|' + ...)

I even don’t know how many subqueries there will be at compile time, so I can’ predict how long the query string will get.

I’d rather avoid calling SelectNodes multiple times for each subquery for I fear performance to be worse (COM Marshaling Overhead into MSXML, handling of several result trees as opposed to a single tree, etc.)

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1 Answer

  1. I’ve not come across any such limit and I doubt you could reach any limit before the shear cost of running the query would make it unfeasable anyway.

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