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Editorial Team
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Asked: 2026-05-31T09:08:41+00:00

Is it possible to SET an attribute value with XPath, like this? XPathNavigator xNav

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Is it possible to SET an attribute value with XPath, like this?

    XPathNavigator xNav = doc.CreateNavigator();
    xNav.MoveToAttribute("requestID", String.Empty);

    xNav.SetAttributeValue??  // need correct method to set a (new) value for current node-attribute..
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  1. Editorial Team

    Most probably (in the code that you haven’t shown), the XPathNavigator is constructed off an XPathDocument. An XPathDocument is read-only by definition (this is why it is much more efficient).

    From the MSDN documentation:

    “XPathNavigator objects created by XPathDocument objects are
    read-only while XPathNavigator objects created by XmlDocument objects
    can be edited.     “

    If you want to update nodes using DOM, you must use another object — say an XmlDocument.

    Of course, people realized long (7 -8 years) ago that DOM isn’t the best possible way of processing XML.

    I definitely recommend to do XML processing using XSLT — a language especially designed for tree transformations.

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