simple .net xml serialization not working

[Jiho Han]

I have a type in a schema:

<xs:complexType name="SimpleExt">
<xs:simpleContent>
<xs:extension base="xs:int">
<xs:attribute name="name" type="xs:string" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>

which I run xsd.exe /c on. It creates the following class:

/// <remarks/>
public class SimpleExt {

/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string name;

/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public int Value;
}

When I compile the class and run xsd.exe on the dll, I get:

<xs:complexType name="SimpleExt">
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="1" name="name" type="xs:string"
/>
<xs:element minOccurs="1" maxOccurs="1" name="Value" type="xs:int" />
</xs:sequence>
</xs:complexType>

This is clearly not what I want. I need to define a class that will
generate the original schema. As you can see, the second schema didn't even
honor my attributes. What must I do in my class to do that? Is this a
xsd.exe limitation?

Thanks and I appreciate your help.
Jiho

[Christoph Schittko [MVP]]

The XML generated when you serialize an object of the SimpleExt class is
valid against your original schema. It will also validate against the new
schema you extracted from the compiled class. However, there is not
information in the class that XSD.exe generated to extract the original
schema. There is no way to store the detail about your XML schema in the
class' metadata so XSD generates a somewhat canonical schema that will
validate the type serialized to XML. The XSD.exe tool does not consider any
constraints such as extension or restriction. That's a known limitation of
the tool.
--
HTH
Christoph Schittko [MVP, XmlInsider]
Software Architect, .NET Mentor

"Jiho Han" <ji******@infinityinfo.com> wrote in message
news:uw**************@TK2MSFTNGP10.phx.gbl...

I have a type in a schema:

<xs:complexType name="SimpleExt">
<xs:simpleContent>
<xs:extension base="xs:int">
<xs:attribute name="name" type="xs:string" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>

which I run xsd.exe /c on. It creates the following class:

/// <remarks/>
public class SimpleExt {

/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string name;

/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public int Value;
}

When I compile the class and run xsd.exe on the dll, I get:

<xs:complexType name="SimpleExt">
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="1" name="name" type="xs:string"
/>
<xs:element minOccurs="1" maxOccurs="1" name="Value" type="xs:int" /> </xs:sequence>
</xs:complexType>

This is clearly not what I want. I need to define a class that will
generate the original schema. As you can see, the second schema didn't even honor my attributes. What must I do in my class to do that? Is this a
xsd.exe limitation?

Thanks and I appreciate your help.
Jiho