XML序列化

Question

我有一个超类和两个子类，我想序列化的子类的对象作为一个列表和反序列化

我试图用一个超类列表，它有物体从两个子类但最终只有一个例外。

有没有办法做到这一点？

Type1 t = new Type1() { text="123" ,opt1=true,opt2=true}; 
Type2 t1 = new Type2() { text="1234",isAnswer=false}; 
Question q1 = new Question() { text="12321"}; 
Question q2 = new Question() { text = "12321" }; 
List<Question> q = new List<Question>() { t1 }; 
FileStream fs = new FileStream("aa.xml", FileMode.OpenOrCreate, FileAccess.Write); 
XmlSerializer xs = new XmlSerializer(typeof(List<Question>)); 
//Exception is generated here InvalidOperationException 
//there was error genearating the XML document 
xs.Serialize(fs, q); 

fs.Close(); 

Answer 1

尝试通过被称为到串行器的类型，如，

serializer = new XmlSerializer(typeof(T), extraTypes);其中extraTypes是，你必须被序列类型的阵列。