我在数据契约上有一个knowntype属性,但不知道如何修改xml以接受这些knowntype
本文关键字:knowntype xml 修改 何修改 契约 数据 有一个 属性 不知道 | 更新日期: 2023-09-27 18:06:10
数据合约示例
[DataContract(Namespace = "namespace")]
[KnownType(typeof(KnownType1))]
public class DataContract
{
[DataMember(IsRequired = true)]
public int Value;
}
如何编写xml以使用KnownType1代替DataContract ?我试过这样做:(我忽略了名称空间和所有额外的东西来简化这个例子)
<DataContract>
<Value> 1</Value>
<KnownType1> ....</KnownType>
</DataContract>
我也试过用KnownType1代替DataContract节点,但我认为这也不正确。
例如,我们有以下dto:
[DataContract(Namespace = "namespace")]
[KnownType(typeof(KnownType1))]
public class DataContract
{
[DataMember(IsRequired = true)]
public int Value;
}
[DataContract(Namespace = "namespace1")]
public sealed class KnownType1 : DataContract
{
[DataMember(IsRequired = true)]
public int Value1;
}
为简单起见(我使用XmlTextWriter(Console.Out)
来打印结果xml),序列化函数看起来像:
private void Serialize<T>(object value)
{
XmlObjectSerializer serializer = new DataContractSerializer(typeof(T));
var writer = new XmlTextWriter(Console.Out)
{
Formatting = Formatting.Indented
};
serializer.WriteObject(writer, value);
}
序列化:
[Fact]
public void Test()
{
Serialize<DataContract>(new KnownType1 { Value = 1, Value1 = 2 });
Serialize<DataContract>(new DataContract { Value = 1 });
}
结果输出:
<DataContract xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d1p1="namespace1" i:type="d1p1:KnownType1" xmlns="namespace">
<Value>1</Value>
<d1p1:Value1>2</d1p1:Value1>
</DataContract>
<DataContract xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="namespace">
<Value>1</Value>
</DataContract>
如您所见,KnownType1
xml包含额外的i:type="d1p1:KnownType1"