Add CData Section to existing xml string in C#

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.NET3.5

Hi Guys,
Requirement is to add CData section to existing XML string of below format

XML

<ContactSet>
<Contacts>
	<Contact>
		<ContactID>33493</ContactID>
		<CustomerID>6663</CustomerID><Fax />
		<EmailID>xyz@gmail.com</EmailID>
		<DateNoMailRequested>1970-01-01T05:30:00</DateNoMailRequested>
		<Password>nJzVu@{YxE3</Password>
		<Phone>918043510100</Phone>
		<Summary>Hi!, Awaiting for your reply. Thanks & Regards</Summary>
	</Contact>
</Contacts>
</ContactSet>

Required output is to be like this

XML

<ContactSet>
<Contacts>
	<Contact>
		<ContactID><![CDATA[33493]]></ContactID>
		<CustomerID><![CDATA[6663]]></CustomerID><Fax />
		<EmailID><![CDATA[xyz@gmail.com]]></EmailID>
		<DateNoMailRequested><![CDATA[1970-01-01T05:30:00]]></DateNoMailRequested>
		<Password><![CDATA[nJzVu@{YxE3]]></Password>
		<Phone><![CDATA[918043510100]]></Phone>
		<Summary><![CDATA[Hi!, Awaiting for your reply. Thanks & Regards]]></Summary>
	</Contact>
</Contacts>
</ContactSet>

Basically without CData section when i try to load xml string into XDocument, .net is giving hex decimal parsing error.
Hope that adding CData section will solve the problem.

Awaiting for reply

Thanks in advance

Posted 18-Jan-11 20:17pm

Madhu J N

Updated 7-Jun-16 6:35am

Tarun.K.S

v3

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JF2015 19-Jan-11 2:26am

Edited to add code formatting.

2 solutions

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Valery Possoz · Answer 1 · 2011-01-18T21:25:00

Solution 1

Hi,

use the WriteCData method of the XMLWriter class.

C#

using (XmlWriter writer = XmlWriter.Create("employees.xml"))
{
    writer.WriteStartElement("ContactID");
    writer.WriteCData(data);
    writer.WriteEndElement();
}

hope it helps.

Valery.

Posted 18-Jan-11 21:25pm

Valery Possoz

Comments

Madhu J N 19-Jan-11 3:35am

Hey thanks for your reply,
Above logic will helps while creating XML, in my case am not creating XML. Basically i'll get xml from outer system, to this xml string i need to add CData section before processing in my application.

rafaelrend · Answer 2 · 2016-06-07T06:35:00

C#

public string InsertCDATASections(DataSet ds, string[] cdataSections)
   {
       //Convert to XML with expanded general entities and CDATA sections
       //as appropriate
       XmlValidatingReader reader = null;
       XmlTextWriter writer = null;
       StringWriter sw = null;
       Array.Sort(cdataSections);
       try
       {
           reader = new XmlValidatingReader(ds.GetXml(), XmlNodeType.Document, null);
           sw = new StringWriter();
           writer = new XmlTextWriter(sw);
           writer.Formatting = Formatting.Indented;
           reader.ValidationType = ValidationType.None;
           reader.EntityHandling = EntityHandling.ExpandCharEntities;
           string currentElement = String.Empty;
           while (reader.Read())
           {
               switch (reader.NodeType)
               {
                   case XmlNodeType.Element:
                       currentElement = reader.Name;
                       writer.WriteStartElement(currentElement);
                       while (reader.MoveToNextAttribute())
                       {
                           writer.WriteAttributeString(reader.Name, reader.Value);
                       }
                       break;
                   case XmlNodeType.Text:
                       if (Array.BinarySearch(cdataSections, currentElement) < 0 && cdataSections.Length > 0 )
                       {
                           writer.WriteString(reader.Value);
                       }
                       else
                       {
                           writer.WriteCData(reader.Value);
                       }
                       break;
                   case XmlNodeType.EndElement:
                       writer.WriteEndElement();
                       break;
                   default:
                       break;
               }
           }
       }
       catch (Exception exp)
       {
           return exp.Message;
       }
       finally
       {
           reader.Close();
           writer.Close();
       }
       return sw.ToString();
   }

Example:

DataSet ds = new DataSet();
string[] sections = new string[]{};

string xml = InsertCDataSections(ds, sections);