KrisTrip KrisTrip - 3 months ago 27
C# Question

Custom Serialization using XmlSerializer

I have a class that I need to do some custom XML output from, thus I implement the IXmlSerializable interface. However, some of the fields I want to output with the default serialization except I want to change the xml tag names. When I call serializer.Serialize, I get default tag names in the XML. Can I change these somehow?

Here is my code:

public class myClass: IXmlSerializable
{
//Some fields here that I do the custom serializing on
...

// These fields I want the default serialization on except for tag names
public string[] BatchId { get; set; }
...

... ReadXml and GetSchema methods are here ...

public void WriteXml(XmlWriter writer)
{
XmlSerializer serializer = new XmlSerializer(typeof(string[]));
serializer.Serialize(writer, BatchId);
... same for the other fields ...

// This method does my custom xml stuff
writeCustomXml(writer);
}

// My custom xml method is here and works fine
...
}


Here is my Xml output:

<MyClass>
<ArrayOfString>
<string>2643-15-17</string>
<string>2642-15-17</string>
...
</ArrayOfString>
... My custom Xml that is correct ..
</MyClass>


What I want to end up with is:

<MyClass>
<BatchId>
<id>2643-15-17</id>
<id>2642-15-17</id>
...
</BatchId>
... My custom Xml that is correct ..
</MyClass>

Answer

In many cases, you can use the XmlSerializer constructor-overload that accepts a XmlAttributeOverrides to specify this extra name information (for example, passing a new XmlRootAttribute) - however, this doesn't work for arrays AFAIK. I expect for the string[] example it would be simpler to just write it manually. In most cases, IXmlSerializable is a lot of extra work - I avoid it as far as possible for reasons like this. Sorry.