XmlSchemaElement.SchemaType returns null - bug?

[eXavier]

Hi all,
I wrote some generator of classes from XSD files but encountred unexpected (for me) values in parsed DOM.

First I load XSD with XmlSchema.Read() method, then iterate through XmlSchemaElements. I have a function
IsComplex() which return bool value if it has simple content (e.g. type string, int,...) or complex one (sequence,
choice, ..). This function looks like this:

bool IsComplex(XmlSchemaElement el) {
if (el.SchemaType is XmlSchemaComplexType) {
XmlSchemaComplexType t = (XmlSchemaComplexType)el.SchemaType;
if (t.ContentModel is XmlSchemaSimpleContent)
return false;
else
return true;
}
else
return false;
}

but when I use definition of type within XSD, SchemaType property of element returns null. I would expect here
instance of XmlSchemaComplexType. However SchemaTypeName is not null and contains correct value
(PackageList for example bellow).
Is it correct behaviour ? Is there better approach how to recognize content of schema element ?

Here's sample of XSD:

<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns="http://test.shipments" targetNamespace="http://test.shipments" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="shipments">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" name="shipment">
<xs:complexType>
<xs:sequence>
<xs:element name="shipment_reference" type="xs:string" />
<xs:element name="packages" type="PackageList" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>

<xs:complexType name="PackageList">
<xs:sequence>
<xs:element name="package_reference" type="xs:string" />
</xs:sequence>
</xs:complexType>

</xs:schema>
Thanks for any help,
eXavier

[Zafar Abbas [MSFT]]

You must compile your schema using XmlSchema.Compile and then access the ElementType property to obtain an instance of the XmlSchemaType corresponding to the type in the schema.
"eXavier" <fh**@centrum.cz> wrote in message news:uA**************@TK2MSFTNGP14.phx.gbl...
Hi all,
I wrote some generator of classes from XSD files but encountred unexpected (for me) values in parsed DOM.

First I load XSD with XmlSchema.Read() method, then iterate through XmlSchemaElements. I have a function
IsComplex() which return bool value if it has simple content (e.g. type string, int,...) or complex one (sequence,
choice, ..). This function looks like this:

bool IsComplex(XmlSchemaElement el) {
if (el.SchemaType is XmlSchemaComplexType) {
XmlSchemaComplexType t = (XmlSchemaComplexType)el.SchemaType;
if (t.ContentModel is XmlSchemaSimpleContent)
return false;
else
return true;
}
else
return false;
}

but when I use definition of type within XSD, SchemaType property of element returns null. I would expect here
instance of XmlSchemaComplexType. However SchemaTypeName is not null and contains correct value
(PackageList for example bellow).
Is it correct behaviour ? Is there better approach how to recognize content of schema element ?

Here's sample of XSD:

<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns="http://test.shipments" targetNamespace="http://test.shipments" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="shipments">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" name="shipment">
<xs:complexType>
<xs:sequence>
<xs:element name="shipment_reference" type="xs:string" />
<xs:element name="packages" type="PackageList" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>

<xs:complexType name="PackageList">
<xs:sequence>
<xs:element name="package_reference" type="xs:string" />
</xs:sequence>
</xs:complexType>

</xs:schema>
Thanks for any help,
eXavier

[eXavier]

Thanks a lot, it works as I need.
However, MSDN class library is poor documentation for using SOM, is there some good source of information on working with SOM ?
I would rather avoid this try-fail approach next time.

eXavier

"Zafar Abbas [MSFT]" <za****@microsoft.com> wrote in message news:%2******************@TK2MSFTNGP14.phx.gbl...
You must compile your schema using XmlSchema.Compile and then access the ElementType property to obtain an instance of the XmlSchemaType corresponding to the type in the schema.
"eXavier" <fh**@centrum.cz> wrote in message news:uA**************@TK2MSFTNGP14.phx.gbl...
Hi all,
I wrote some generator of classes from XSD files but encountred unexpected (for me) values in parsed DOM.

First I load XSD with XmlSchema.Read() method, then iterate through XmlSchemaElements. I have a function
IsComplex() which return bool value if it has simple content (e.g. type string, int,...) or complex one (sequence,
choice, ..). This function looks like this:

bool IsComplex(XmlSchemaElement el) {
if (el.SchemaType is XmlSchemaComplexType) {
XmlSchemaComplexType t = (XmlSchemaComplexType)el.SchemaType;
if (t.ContentModel is XmlSchemaSimpleContent)
return false;
else
return true;
}
else
return false;
}

but when I use definition of type within XSD, SchemaType property of element returns null. I would expect here
instance of XmlSchemaComplexType. However SchemaTypeName is not null and contains correct value
(PackageList for example bellow).
Is it correct behaviour ? Is there better approach how to recognize content of schema element ?

Here's sample of XSD:

<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns="http://test.shipments" targetNamespace="http://test.shipments" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="shipments">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" maxOccurs="unbounded" name="shipment">
<xs:complexType>
<xs:sequence>
<xs:element name="shipment_reference" type="xs:string" />
<xs:element name="packages" type="PackageList" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>

<xs:complexType name="PackageList">
<xs:sequence>
<xs:element name="package_reference" type="xs:string" />
</xs:sequence>
</xs:complexType>

</xs:schema>
Thanks for any help,
eXavier