[英]How to convert xml attribute to custom object during deserialization in C# using XmlSerializer
I get 我明白了
InvalidCastException: Value is not a convertible object: System.String to IdTag
InvalidCastException: Value不是可转换对象:System.String到IdTag
while attempting to deserialize xml attribute. 尝试反序列化xml属性时。
Here's the sample xml: 这是示例xml:
<?xml version="1.0" encoding="windows-1250"?>
<ArrayOfItem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<Item Name="Item Name" ParentId="SampleId" />
</ArrayOfItem>
Sample classes: 样本类:
public class Item
{
[XmlAttribute]
public string Name { get; set; }
[XmlAttribute]
public IdTag ParentId { get; set; }
}
[Serializable]
public class IdTag
{
public string id;
}
The exception is thrown from Convert.ToType()
method (which is called from XmlSerializer
). 从
Convert.ToType()
方法(从XmlSerializer
调用Convert.ToType()
抛出异常。 AFAIK there is no way to "implement" IConvertible
interface for System.String
to convert to IdTag
. AFAIK没有办法为
System.String
“实现” IConvertible
接口转换为IdTag
。 I know I can implement a proxy property ie: 我知道我可以实现代理属性,即:
public class Item
{
[XmlAttribute]
public string Name {get; set;}
[XmlAttribute("ParentId")]
public string _ParentId { get; set; }
[XmlIgnore]
public IdTag ParentId
{
get { return new IdTag(_ParentId); }
set { _ParentId = value.id; }
}
}
Is there any other way? 还有其他方法吗?
You have to tell the XmlSerializer
what string it needs to look for in your IdTag
object. 您必须告诉
XmlSerializer
在IdTag
对象中需要查找的字符串。 Presumably, there's a property of that object that you want serialized (not the whole object). 据推测,您希望序列化该对象的属性(而不是整个对象)。
So, you could change this: 所以,你可以改变这个:
[XmlAttribute]
public IdTag ParentId { get; set; }
to this: 对此:
[XmlIgnore]
public IdTag ParentIdTag { get; set; }
[XmlAttribute]
public string ParentId
{
get { return ParentIdTag.id; }
set { ParentIdTag.id = value; }
}
Note the difference between this and what you posted - when you deserialize this, your ParentIdTag
proxy object should be properly initialized. 请注意它与您发布的内容之间的区别 - 当您反序列化时,应正确初始化
ParentIdTag
代理对象。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.