ASP.NET Web Service returning XML result and nodevalue is always null
I have an ASP.NET web service which returns an XMLDocument. The web service is called from a Firefox extension using XMLHttpRequest.
var serviceRequest = new XMLHttpRequest();
serviecRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
I consume the result using responseXML. So far so good. But when I iterate through the XML I retrieve nodeValue - nodeValue is always null. When I check the nodeType the nodeType is type 1 (Node.ELEMENT_NODE == 1).
Node.NodeValue states all nodes of type Element will return null.
In my webservice I have created a string with the XML i.e. xml="<Root><Book>开发者_如何学编程;<Author>Hank</Author></Book></Root>"
I then create the XmlDocument
XmlDocument doc = new XmlDocument();
doc.LoadXML(string);
I know I can specify the nodetype using using CreateNode. But when I am just building the xml by appending string values is there a way to change the nodeType to Text so Node.nodeValue will be "content of the text node".
I just had to stop and review the documentation.
nodeValue is s standard DOM property and it returns a nodeValue. Node types such as attributes or text have a value. Elements do not have a value - they only have child nodes.
So rather than node.nodeValue I just needed to call node.firstChild.nodeValue.
That is because a simple XML element that only contains text seems like it should have a value of its text but it is actually an element that has a single child node. The child node is a text node and its the text node that has the value.
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