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POHow to tell XmlSerializer to serialize properties with [DefautValue(...)] always?
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  1. POHow to tell XmlSerializer to serialize properties with [DefautValue(...)] always?
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    copied!<p>I am using <code>DefaultValue</code> attribute for the proper <code>PropertyGrid</code> behavior (it shows values different from default in bold). Now if I want to serialize shown object with the use of <code>XmlSerializer</code> there will be no entries in xml-file for properties with default values.</p> <p><strong>What is the easiest way to tell XmlSerializer to serialize these still?</strong> </p> <p>I need that to support "versions", so when I change default value later in the code - serialized property gets value it had serialized with, not "latest" one. I can think about following:</p> <ul> <li>Override behavior of <code>PropertyGrid</code> (use custom attribute, so it will be ignoreed by <code>XmlSerializer</code>);</li> <li>Do sort of a custom xml-serialization, where ignore <code>DefaultValue</code>'s;</li> <li>Do something with object before passing it to <code>XmlSeriazer</code> so it won't contain <code>DefaultValue</code>'s anymore.</li> </ul> <p>But there is a chance I miss some secret property what allows to do it without much pain =D.</p> <p>Here is an example of what I want:</p> <pre><code> private bool _allowNegative = false; /// &lt;summary&gt; /// Get or set if negative results are allowed /// &lt;/summary&gt; [Category(CategoryAnalyse)] [Admin] [TypeConverter(typeof(ConverterBoolOnOff))] //[DefaultValue(false)] *1 public bool AllowNegative { get { return _allowNegative; } set { _allowNegative = value; ConfigBase.OnConfigChanged(); } } //public void ResetAllowNegative() { _allowNegative = false; } *2 //public bool ShouldSerializeAllowNegative() { return _allowNegative; } *3 //public bool ShouldSerializeAllowNegative() { return true; } *4 </code></pre> <p>If I uncomment (*1), then I have desired effect in <code>PropertyGrid</code> - properties with default values are displayed in normal text, otherwise text is bold. However <code>XmlSerializer</code> will <strong>NOT</strong> put properties with default value into xml-file and this is <strong>BAD</strong> (and I am trying to fix it).</p> <p>If I uncomment (*2) and (*3), then it's totally same as uncommenting (*1).</p> <p>If I uncomment (*2) and (*4), then <code>XmlSerializer</code> will always put properties into xml-file, but this happens because they <strong>do not have default value anymore</strong> and <code>PropertyGrid</code> shows all values in bold text.</p>
 

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