XML element not displaying for null values

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Hi,

I am using an xml file to import into the database using the below code.

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(path + "Data.xml");
XmlNodeList nodeList = xmlDoc.DocumentElement.SelectNodes("/DocumentElement/Profile");
//read XML data and ID is one of the column
object[] ID = XDocument.Load(path + "Data.xml").Descendants("ID").Select(element => Element.Value).ToArray();

Now the ID element has null values and when I read them the rows with null values are omitted. How can I set empty string values for those null nodes?

Posted 16-Nov-15 18:00pm

vignesht50

Updated 16-Nov-15 18:14pm

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Sergey Alexandrovich Kryukov 17-Nov-15 0:16am

How those null values are expressed in XML?
—SA

vignesht50 17-Nov-15 0:17am

the attribute is missed out for few rows which has empty node values. So the attribute ID by itself is not present.

Sergey Alexandrovich Kryukov 17-Nov-15 0:20am

This is not null... :-)
—SA

vignesht50 17-Nov-15 0:22am

Could I call it empty string values?

Sergey Alexandrovich Kryukov 17-Nov-15 0:28am

Normally, empty string will result in a non-null string with empty content...
It all depends on the model/schema (conventions). For example, XSI schema defines special namespace to define nil and other reference-related entities. See, for example,
http://docstore.mik.ua/orelly/xml/schema/ch11_03.htm...
You are doing ad-hoc parsing (which is bad for maintainability), so you can define attribute carrying the information that the node takes its mandatory place and signifies null reference.
—SA

vignesht50 17-Nov-15 0:30am

I am converting an excel file to xml and how can I set null there?

Sergey Alexandrovich Kryukov 17-Nov-15 0:34am

It depends on how you want to define it...
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-11-16T18:36:00

Solution 1

Look at the answers to this question where the authors of the answer post briefly reviewed the problem: http://stackoverflow.com/questions/774192/what-is-the-correct-way-to-represent-null-xml-elements[^].

See also my comments and another link I provided…

—SA

Posted 16-Nov-15 18:36pm

Sergey Alexandrovich Kryukov