Cannot serialize member 'XXX' of type System.Nullable`1[System.Decimal]. XmlAttribute/XmlText cannot be used to encode complex types [duplicate]

This question already has answers here: Serializing a Nullable<DateTime> in to XML (6 answers) Closed 8 years ago.

I'm getting the following error when using a web service: Cannot serialize member 'XXX' of type System.Nullable`1[System.Decimal]. XmlAttribute/XmlText cannot be used to encode complex types.

I understand the error 开发者_开发百科and found a solution on this blog: https://web.archive.org/web/20120201220703/http://www.jamesewelch.com/2009/02/03/how-to-serialize-subsonic-objects-with-nullable-properties/

I would like to use solution 2, as you will see from my comments on the blog I'm not having much luck. I'm using an ExcuteTypeList to bring the data back.

Any pointers or help would be great.

Thanks

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You need to remove [XmlAttribute] and apply [XmlElement] to the XXX field.

[XmlElement(IsNullable = true)] public decimal? XXX;

public bool ShouldSerializeXXX()
{
   return XXX.HasValue;
}