how to insert empty null in xml while encrypting or decrypting the data

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Dear Friends Here i want to know how to insert null values in xml,Datatype is ineger.If it is string not a problem.But while comes to interger the xml schema not returning null values

Example:

table
empid>423 coursename>Diploma In Political Software Management <subjectname>Political Science,SharePoint,Super Subject,Power Subject
duration>2 status>Not Completed

But now i want xml should be

HTML

<table>
    empid />
    coursename>Diploma In Political Software Management
    subjectname>Political Science,SharePoint,Super Subject,Power Subject
    uration>2
    tatus>Not Completed
 </table>

That emp id should display empty

please rectify it......

Posted 23-Apr-12 18:08pm

Anil Honey 206

Updated 24-Apr-12 12:51pm

El_Codero

v3

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El_Codero 24-Apr-12 18:54pm

if your xml should be like in your example, you're doing something wrong.
What you've tried so far to create your XML, please provide code.Regards

Sergey Alexandrovich Kryukov 25-Apr-12 0:43am

In other words, this is not a XML at all.
However, the question is interesting enough; I've answered it -- please see.
--SA

Sergey Alexandrovich Kryukov 25-Apr-12 0:45am

Probably this wrong XML code is just because of bad HTML. OP needs to escape <> with HTML entities: <>…
--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-04-24T18:42:00

You can invent any custom ways of representing null, but there is a standard way. It is described with this schema:
http://www.w3.org/2001/XMLSchema-instance[^].

Please take a look. Basically, it describes just 4 attributes: "type", noNamespaceSchemaLocation, "schemaLocation" and "noNamespaceSchemaLocation".

You should use i:nil="true" to express null (where i is some namespace prefix referencing the namespace shown above, it can be any unique valid identifier).

For some example of the usage, you can see how Data Contract works, more exactly System.Runtime.Serialization.DataContractSerializer. It can serialize any object graph defined by a contract, with any members including null; and the null is expressed as I've shown above. You can try using it to see how it works. Please see:
http://msdn.microsoft.com/en-us/library/ms733127.aspx[^],
http://msdn.microsoft.com/en-us/library/system.runtime.serialization.datacontractserializer.aspx[^].

—SA