序列化可空＆LT;＆日期时间GT;到XML [英] Serializing a Nullable<DateTime> in to XML

问题描述

我试图序列化类的几个数据成员是可空的对象，下面是一个例子

I am trying to serialize a class several of the data-members are Nullable objects, here is a example

[XmlAttribute("AccountExpirationDate")]
public Nullable<DateTime> AccountExpirationDate 
{ 
  get { return userPrincipal.AccountExpirationDate; } 
  set { userPrincipal.AccountExpirationDate = value; } 
}

但在运行时出现错误

However at runtime I get the error

无法序列类型System.Nullable`1 [System.DateTime的]的成员AccountExpirationDate。 XmlAttribute / XMLTEXT不能使用EN code复杂的类型。

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

不过，我检查，可为空值是 SerializableAttribute 。我究竟做错了什么？

However I checked and Nullable is a SerializableAttribute. What am I doing wrong?

推荐答案

您可以只序列它作为一个的XmlElement ，而不是作为一个 XmlAttribute ，作为再presentation是一个属性过于复杂。这就是例外是告诉你。

You can only serialize it as an XmlElement, not as an XmlAttribute, as the representation is too complex for an attribute. That's what the exception is telling you.

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