Getting started with XSD validation with .NET

Question

Here is my first attempt at validating XML with XSD.

The XML file to be validated:

Answer 1

Your code to extract the schema location looks weird. Why do you get the value of the xmlns attribute and concatenate it with the value of the xsi:noNamespaceSchemaLocation attribute? The exception is caused by the fact that you cannot specify a prefix in a call to Attributes; you need to specify the desired XNamespace.

Try this (untested):

// Load document
XDocument doc = XDocument.Load("file.xml");

// Extract value of xsi:noNamespaceSchemaLocation
XNamespace xsi = "http://www.w3.org/2001/XMLSchema-instance";
string schemaURI = (string)doc.Root.Attribute(xsi + "noNamespaceSchemaLocation");

// Create schema set
XmlSchemaSet schemas = new XmlSchemaSet();
schemas.Add("Schemas", schemaURI);

// Validate
doc.Validate(schemas, (o, e) =>
                      {
                          Console.WriteLine("{0}", e.Message);
                      });