[英]XML deserialization of derived classes
How can I create deserialization method that can take an object of class or any of derived classes? 如何创建可以接受类对象或任何派生类的反序列化方法?
public class Config
{
public string appname;
}
public class CustomConfig1 : Config
{
public string CustomConfig1Param1;
public string CustomConfig1Param2;
}
public class CustomConfig2 : Config
{
public string CustomConfig2Param1;
public string CustomConfig2Param2;
}
I want to get something like serialization method that defines type of input object: 我想得到类似序列化方法的东西,该方法定义了输入对象的类型:
public string serialize(object obj)
{
XmlSerializer serializer = new XmlSerializer(obj.GetType());
StringWriter serialized = new StringWriter();
serializer.Serialize(serialized, obj);
return serialized.ToString();
}
But when I read an XML from DB I can't define the type of object, so I can't pass it to XmlSerializer . 但是,当我从数据库读取XML时,我无法定义对象的类型,因此无法将其传递给XmlSerializer 。 It may be the Config object or any of derived classes
它可以是Config对象或任何派生类
Please help. 请帮忙。 How can I define the type of input object?
如何定义输入对象的类型?
[XmlInclude(typeof(CustomConfig1))]
[XmlInclude(typeof(CustomConfig2))]
public class Config
{
public string appname;
}
Then just serialize/deserialize specifying typeof(Config)
; 然后只需序列化/反序列化指定
typeof(Config)
; the library will give you back an instance of the appropriate type based on the data. 该库将根据数据为您提供适当类型的实例。
Edit: full example, including the preference to not hard-code the sub-types: 编辑:完整示例,包括不对子类型进行硬编码的首选项:
using System;
using System.IO;
using System.Xml.Serialization;
public class Config
{
public string appname;
}
public class CustomConfig1 : Config
{
public string CustomConfig1Param1;
public string CustomConfig1Param2;
}
public class CustomConfig2 : Config
{
public string CustomConfig2Param1;
public string CustomConfig2Param2;
}
static class Program
{
static void Main()
{
var original = new CustomConfig1
{
appname = "foo",
CustomConfig1Param1 = "x",
CustomConfig1Param2 = "y"
};
var xml = Serialize(original);
var clone = DeserializeConfig(xml);
Console.WriteLine(clone.appname);
var typed = (CustomConfig1)clone;
Console.WriteLine(typed.CustomConfig1Param1);
Console.WriteLine(typed.CustomConfig1Param2);
}
public static string Serialize(Config obj)
{
using (var serialized = new StringWriter())
{
GetConfigSerializer().Serialize(serialized, obj);
return serialized.ToString();
}
}
public static Config DeserializeConfig(string xml)
{
using(var reader = new StringReader(xml))
{
return (Config)GetConfigSerializer().Deserialize(reader);
}
}
static Type[] GetKnownTypes()
{
// TODO: resolve types properly
return new[] { typeof(CustomConfig1), typeof(CustomConfig2) };
}
private static XmlSerializer configSerializer;
public static XmlSerializer GetConfigSerializer()
{
return configSerializer ?? (configSerializer =
new XmlSerializer(typeof(Config), GetKnownTypes()));
}
}
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