Recently, I needed to validate any XML documents within BizTalk. I tried, but it was too limiting in that it required the SchemaStrongName property of the message, which, for a message of type XmlDocument, was not the actual schema's name. Since we wanted to validate against any XmlDocument message, I had to come up with another solution.
What I did was, in a helper project, reference our BizTalk schemas assembly and pre-load all the schemas in the that assembly at class load time into an XmlSchemaSet (this is a.NET 2.0 solution, there should be a similar solution for 1.1):
private readonly static XmlSchemaSet _schemaSet;
static XMLHelper{ _schemaSet = new XmlSchemaSet; Assembly schemaAssembly = Assembly.GetAssembly(typeof(MyBizTalkProject.Schemas.SomeSchema)); foreach (Type type in schemaAssembly.GetTypes) { if (typeof(SchemaBase).IsAssignableFrom(type) &&!type.IsNested) _schemaSet.Add((Activator.CreateInstance(type) as SchemaBase).Schema); } }
Then, a simple validation function can validate any XML document against any of the schemas in your schema project:
public bool ValidateDocument(XmlDocument businessDocument) { ValidationHelper helper = new ValidationHelper; bool isValid = helper.Validate(businessDocument, _schemaSet); return isValid; }
public class ValidationHelper { private bool _isValid = true;
public bool Validate(XmlDocument document, XmlSchemaSet schema) { ValidationEventHandler eventHandler = new ValidationEventHandler(HandleValidationError); document.Schemas = schema; document.Validate(eventHandler); return _isValid; }
private void HandleValidationError(object sender, ValidationEventArgs ve) { _isValid = false; } }