Question regarding serialization and System.Uri

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Rob Millman - 05 Apr 2006 15:17 GMT

I am trying to serialize an instance of the Uri class. The class implements
the ISerializable interface but when I try to use an XMLSerializer to
serialize it, I get an exception that the object cannot be serialized because
it does not implement a default constructor (no parameters). Is this a "bug"
in the framework or am I doing something wrong?

Robert Millman

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"Peter Huang" [MSFT] - 06 Apr 2006 04:55 GMT

Hi Robert,

Based on my research, this is be design. Not all the .NET class can be XML
serialized.
XmlSerializerPreCompiler
Here is tool from Chris Sells which can check if certian class can be XML
serialized.
http://www.sellsbrothers.com/tools/
This is for .NET 1.1.

If you do need to serialize it, I think you may need to Write your own
class to stored the URI information.
Commonly I think a string is OK. So that we can serialize it.

Thanks for your understanding!

Best regards,

Peter Huang

Microsoft Online Community Support
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Rob Millman - 06 Apr 2006 20:14 GMT

I'm a bit confused. The class implements the ISerializable interface. If
the class cannot be serialized by design, why does it implement the
interface? I ask these questions for two reasons, 1) to understand the .NET
framework classes better and 2) to better understand how I should design my
classes.

Thanks for YOUR understanding.

Robert Millman

> Hi Robert,
>
[quoted text clipped - 22 lines]
> ==================================================
> This posting is provided "AS IS" with no warranties, and confers no rights.

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"Peter Huang" [MSFT] - 07 Apr 2006 03:43 GMT

Hi Robert,

I am sorry if I have any confusion.

If a class can be XML serialized did not depend on if the customer has
implement the ISerializable.
If we look into the MSDN, we will find the related class about the
ISerializable is under the namespace System.Runtime.Serialization.

While the XMLSerializer is under the namespace System.Xml.Serialization.
They are using different approach to do the serialization. e.g. In
XMLSerializer, it will generated dynamic assembly, but the
System.Runtime.Serialization will not.

Here are some link about Run-time Serialization for your reference.
Run-time Serialization
http://msdn.microsoft.com/msdnmag/issues/02/04/net/
Run-time Serialization, Part 2
http://msdn.microsoft.com/msdnmag/issues/02/07/net/
Run-time Serialization, Part 3
http://msdn.microsoft.com/msdnmag/issues/02/09/net/

So far we did not have a official document about which class can be xml
serialized.
Commonly a very simple class can be XML serialized.
So we have a tool as I post before to check the class you are developing.

Introducing XML Serialization
http://msdn2.microsoft.com/en-us/library/182eeyhh.aspx

If you still have any concern, please feel free to post here.

Best regards,

Peter Huang

Microsoft Online Community Support
==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

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Question regarding serialization and System.Uri

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