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c#xmlxsdschema

XmlSchemaInference.InferSchema infers type="xsd:unsignedByte" for UInt32 Property (.Net)

I am creating an XSD document from a C# class.

This class has a property with type UInt32 that I expect to map to xs:unsignedInt based on this article:

Mapping XML Data Types to CLR Types

The code for generating the .xsd is:

XmlReader reader = XmlReader.Create("class.xml");
XmlSchemaSet schemaSet = new XmlSchemaSet();
XmlSchemaInference schema = new XmlSchemaInference();

schemaSet = schema.InferSchema(reader);

However, in the xsd I see the element to be inferred to: <xsd:element name="u32Value" type="xsd:unsignedByte" />

Why is the type not what I expect?

Solution

  • Based on the comments I discovered that I needed to initialize the Property to a value to help the XmlSchemaInference.InferSchema infer the proper type.

    I originally planned on using xsd.exe to create the xsd file, but upon getting errors, decided to generate it programmatically through XmlSchemaInference.InferSchema. I neglected to consider the nuance you pointed out. When I initialize the property to UInt32.MaxValue, I get the expected results.