[英]How to XML serialize polymorphic array without wrapping element
想要將我的數據序列化為:
<?xml version="1.0" encoding="ibm850"?>
<Batch Name="Test batch">
<ExecuteCommand Command="..." />
<WaitCommand Seconds="5" />
</Batch>
但相反,我得到這個(注意包裝命令元素)
<?xml version="1.0" encoding="ibm850"?>
<Batch Name="Test batch">
<Commands><!-- I want to get rid of thiw wrapper Commands element and just -->
<ExecuteCommand Command="..." />
<WaitCommand Seconds="5" />
</Commands>
</Batch>
以下是用於生成此代碼的示例代碼:
public class BaseCommand //base class
{
[XmlAttribute]
public string Result { get; set; }
}
public class ExecuteCommand : BaseCommand
{
[XmlAttribute]
public string Command { get; set; }
}
public class WaitCommand : BaseCommand
{
[XmlAttribute]
public int Seconds { get; set; }
}
public class Batch
{
[XmlAttribute]
public string Name { get; set; }
private List<BaseCommand> _commands = new List<BaseCommand>();
[XmlArrayItem(typeof(ExecuteCommand))]
[XmlArrayItem(typeof(WaitCommand))]
public List<BaseCommand> Commands
{
get
{
return _commands;
}
set
{
_commands = value;
}
}
public static void Main()
{
XmlSerializer serializer = new XmlSerializer(typeof(Batch));
Batch b = new Batch();
b.Name = "Test batch";
b.Commands.Add(new ExecuteCommand() { Command = "..." });
b.Commands.Add(new WaitCommand() { Seconds = 5 });
serializer.Serialize(Console.Out, b);
Console.Read();
}
}
我搜索並閱讀了關於這個主題的大量文章。 它們似乎都提供了使用單個類型序列化集合的解決方案(不使用繼承)。 我使用繼承,似乎沒有任何工作。 不幸的是,由於遺留支持,我必須輸出精確的XML文檔
這是很久以前的事了,但我最終還是自己想出來了。
解決方案是將每個受支持的派生類型的[XmlElement]屬性添加到集合屬性
private List<BaseCommand> _commands = new List<BaseCommand>();
[XmlElement(typeof(ExecuteCommand))]
[XmlElement(typeof(WaitCommand))]
public List<BaseCommand> Commands
{
get
{
return _commands;
}
set
{
_commands = value;
}
}
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