XmlIgnore仅在序列化中

Question

        private string _password;

        public string Password
        {
            get 
            {
                return _password; 
            }
            set
            {
                if (_password != value)
                {
                    _password = PasswordEncryptor.Encode(value);
                    OnPropChanged("Password");                
                }
            }
        }

PasswordEncryptor is a class where I call the Encode method to encode. And after the Password is encoded, it is serialized by XmlSerializer to a file in disk. However, every time when the program starts, the file is deserialized, and in set , PasswordEncryptor.Encode() encodes the Password again. Is there a way I can [XmlIgnore] it ONLY in deserialization?

Answer 1

XmlAttributeOverrides can help in this scenario.

From MSDN

Allows you to override property, field, and class attributes when you use the XmlSerializer to serialize or deserialize an object

Using this we can make a particular property to be ignored during deserialization.

It will be something like this...

XmlElementAttribute attr = new XmlElementAttribute();
attr.ElementName = "<elementName>";

XmlAttributes attrs = new XmlAttributes();
attrs.XmlIgnore = true;
attrs.XmlElements.Add(attr);

XmlAttributeOverrides attrOverrides = new XmlAttributeOverrides();
attrOverrides.Add(typeof(<className>), "<elementName>", attrs);

// use this when deserializing
XmlSerializer s = new XmlSerializer(typeof(<className>), attrOverrides);

// use this when serializing
XmlSerializer s = new XmlSerializer(typeof(<className>));