IXmlSerializable with valid XmlSchema (XMLSchema:schema' element is not declared..)
I am trying to implement IXmlSerializable. My class implements serializable and writes a single string. I wish to be able to export an object graph schema using XsdDataContractExporter (the standard one).
The class serializes to a simple xml.
<Urn ns='http://palantir.co.za/urn'>somestring</Urn>
My implementation of GetSchema, which corresponds to the XmlSchemaProvider attribute is as follows.
I need to be able to generate and export the schema.
public static XmlQualifiedName GetSchema(XmlSchemaSet xs)
{
string ns = "http://palantir.co.za/urn";
if (xs.Schemas("http://palantir.co.za/urn").Count != 0)
return new XmlQualifiedName("Urn", ns); // tried many.
XmlSchema schema = new XmlSchema();
schema.Namespaces.Add("xs", XmlSchema.Namespace);
schema.Namespaces.Add("Urn", ns); // tried many prefixes.
schema.ElementFormDefault = XmlSchemaForm.Qualified;
schema.Items.Add(
new XmlSchemaElement() {
Name = "Urn",
SchemaTypeName = XmlSchemaType.GetBuiltInSimpleType(XmlTypeCode.String).QualifiedName
});
schema.TargetNamespace = ns;
开发者_StackOverflow中文版 xs.Add(schema);
//xs.Compile();
return new XmlQualifiedName("Urn", schema.TargetNamespace);
}
I get the following error:
The http://www.w3.org/2001/XMLSchema:schema element is not declared..when I try to export the schema.
Try compose XSD schema in separate file (it much easier that composing in runtime). Make sure it's correnct. Place xsd schema into your assembly as a resource. Then, in your GetSchema method just deserialize it :
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
{
return XmlSchema.Read(stream, null);
}
Also notice that your method GetSchema will be called in runtime on any (de)serialization. So desirializing schema each time itsn't good idea.
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