Can .NET XmlSerializer Serialize Strings as CDATA Using Attributes?

Use XmlSerializer to serialize string to CDATA

Does XmlSerializer for .NET allow serializing strings to CDATA using attributes?

Solution:

.NET's XmlSerializer class does not directly allow CDATA serialization using properties. However, you can use a combination of XmlIgnore properties and custom properties to achieve the desired results.

Here is an example class that demonstrates this approach:

[Serializable]
public class MyClass
{
    public MyClass() { }

    [XmlIgnore]
    public string MyString { get; set; }

    [XmlElement("MyString")]
    public System.Xml.XmlCDataSection MyStringCDATA
    {
        get
        {
            return new System.Xml.XmlDocument().CreateCDataSection(MyString);
        }
        set
        {
            MyString = value.Value;
        }
    }
}

In this custom class, use the XmlIgnore attribute to exclude the MyString property from serialization. Instead, a new MyStringCDATA property is defined, which returns a System.Xml.XmlCDataSection object that encapsulates the required string. This allows CDATA serialization without the need for additional attributes.

Usage:

To use this method, you create a MyClass instance, set the MyString property, and then serialize it using XmlSerializer:

MyClass mc = new MyClass();
mc.MyString = "<test>Hello World</test>";
XmlSerializer serializer = new XmlSerializer(typeof(MyClass));
StringWriter writer = new StringWriter();
serializer.Serialize(writer, mc);
Console.WriteLine(writer.ToString());

Output:

This will produce the following XML output:

<?xml version="1.0" encoding="utf-16"?><myclass xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><mystring><![CDATA[Hello World]]></mystring></myclass>

Note that the MyString value is wrapped in a CDATA section as expected.

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