下面的例子告诉我“[One xmlns =”]不是预期的.”例外
public abstract class BaseClass{ }
[XmlRoot("One")]
public class ChildOne : BaseClass {}
[XmlRoot("Two")]
public class ChildTwo : BaseClass { }
class Program
{
private static void Main(string[] args)
{
var ser = new XmlSerializer(typeof (BaseClass), new Type[] {typeof (ChildOne), typeof (ChildTwo)});
var obj1 = ser.Deserialize(new StringReader(@"<?xml version=""1.0""?><One></One>"));
var obj2 = ser.Deserialize(new StringReader(@"<?xml version=""1.0""?><Two></Two>"));
}
}
我需要反序列化XML(不是由我生成的).根标签可能有不同的名称,我必须映射到不同的类.
PS.我知道有很多这样的问题.我研究过它们但我的问题仍未解决.
解决方法:
我的问题没有大肆宣传.社区可能会认为这只是一个白痴问的另一个愚蠢的问题.他们可能是对的.我必须自己回答,但要注意:答案也可能是愚蠢的.
我最终探测了XML的根元素,然后将其映射到一种已知类型并使用该类型进行反序列化.像这样:
public abstract class BaseClass{ }
[XmlRoot("One")]
public class ChildOne : BaseClass {}
[XmlRoot("Two")]
public class ChildTwo : BaseClass { }
class Program
{
private static void Main(string[] args)
{
var known = new Type[] {typeof (ChildOne), typeof (ChildTwo)};
var obj1 = Deserialize<BaseClass>(@"<?xml version=""1.0""?><One></One>", known);
var obj2 = Deserialize<BaseClass>(@"<?xml version=""1.0""?><Two></Two>", known);
}
private static T Deserialize<T>(string xml, Type[] knownTypes)
{
Type rootType = typeof (T);
if (knownTypes.Any())
{
using (var reader = XmlReader.Create(new StringReader(xml)))
{
reader.MoveToContent();
rootType = (from kt in knownTypes
let xmlRoot = kt.GetCustomAttributes<XmlRootAttribute>().FirstOrDefault()
where kt.Name == reader.Name || (xmlRoot != null && xmlRoot.ElementName == reader.Name)
select kt).FirstOrDefault() ?? typeof(T);
}
}
return (T) new XmlSerializer(rootType, knownTypes).Deserialize(new StringReader(xml));
}
}