C＃ - 派生类的XML序列化 [英] C# - XML serialization of derived classes

问题描述

我试图序列化多个元素（供应商，客户，产品等）的名单，都来自同一个类（MasterElement）

I'm trying to serialize a List of multiple elements (Suppliers, Customers, Products, etc), all deriving from the same class (MasterElement)

public class XMLFile
{
    [XmlArray("MasterFiles")]
    public List<MasterElement> MasterFiles;
    ...
}

[XmlInclude(typeof(Supplier))]
[XmlInclude(typeof(Customer))]
public abstract class MasterElement
{
    public MasterElement() 
    {

    }
}

[XmlType(TypeName = "Supplier")]
public class Supplier: MasterElement
{
    public string SupplierID;
    public string AccountID;
}

[XmlType(TypeName = "Customer")]
public class Customer: MasterElement
{
    public string CustomerID;
    public string AccountID;
    public string CustomerTaxID;
}

到目前为止，XML被解析，但当前输出是

So far, the XML is parsing, but the current output is

<MasterFiles>
    <MasterElement xsi:type="Supplier">
        <SupplierID>SUP-000001</SupplierID>
        <AccountID>Unknown</AccountID>
    </MasterElement>
    <MasterElement xsi:type="Customer">
        <CustomerID>CLI-000001</CustomerID>
        <AccountID>Unknown</AccountID>
        <CustomerTaxID>Unknown</CustomerTaxID>
    </MasterElement>
</MasterFiles>

但我想什么是

but what I want to is

<MasterFiles>
    <Supplier>
        <SupplierID>SUP-000001</SupplierID>
        <AccountID>Unknown</AccountID>
    </Supplier>
    <Customer>
        <CustomerID>CLI-000001</CustomerID>
        <AccountID>Unknown</AccountID>
        <CustomerTaxID>Unknown</CustomerTaxID>
    </Customer>
</MasterFiles>

我在做什么错在这里？

What am I doing wrong here?

推荐答案

您可以使用 XmlArrayItem 来解决这个问题：

You can use XmlArrayItem to get around this:

public class XMLFile
{
    [XmlArray("MasterFiles")]
    [XmlArrayItem("Supplier", typeof(Supplier))]
    [XmlArrayItem("Customer", typeof(Customer))]
    public List<MasterElement> MasterFiles;
}

从链接的MSDN：

From the linked MSDN:

的XmlArrayItemAttribute支持多态性 - 换句话说，它
允许XmlSerializer的派生对象添加到阵列

The XmlArrayItemAttribute supports polymorphism--in other words, it allows the XmlSerializer to add derived objects to an array.

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