Validating Large Xml Files

Question

As a continuation of my problem of transforming large Xml files, I need to check the schema.

I used this extension method, which can be clearly improved since it does not work correctly.

public static XElement ValidateXsd(this XElement source, string xsdPath) { var errors = new XElement("Errors"); // Reference: http://msdn.microsoft.com/en-us/library/bb358456.aspx var xsd = XDocument.Load(xsdPath); var xml = XDocument.Load(source.CreateReader()); var schemas = new XmlSchemaSet(); schemas.Add("", xsd.CreateReader()); if (xml.Document != null) { xml.Document.Validate(schemas, // Validation Event/Error Handling (sender, e) => { var message = e.Message .Replace( "element is invalid - The value '' is invalid according to its datatype 'requiredString' - The actual length is less than the MinLength value.", "cannot be blank.") .Replace( "is invalid according to its datatype 'size' - The Pattern constraint failed.", "must be numeric.") .Replace( "element is invalid", "is invalid."); errors.Add(new XElement("Error", message)); } ); } // If there were errors return them, otherwise return null return errors.Elements().Count() > 0 ? errors : null; } 

Answer 1

Try this instead:

 public static XElement ValidateXsd(this XElement source, string xsdPath) { var errors = new XElement("Errors"); // Reference: http://msdn.microsoft.com/en-us/library/bb358456.aspx var schemas = new XmlSchemaSet(); using (var reader = XmlReader.Create(xsdPath)) { schemas.Add("", reader); } { source.Document.Validate( schemas, // Validation Event/Error Handling (sender, e) => { var message = e.Message.Replace( "element is invalid - The value '' is invalid according to its datatype 'requiredString' - The actual length is less than the MinLength value.", "cannot be blank.").Replace( "is invalid according to its datatype 'size' - The Pattern constraint failed.", "must be numeric.").Replace("element is invalid", "is invalid."); errors.Add(new XElement("Error", message)); }); } // If there were errors return them, otherwise return null return errors.Elements().Count() > 0 ? errors : null; } 

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Try this instead:

 using System.Linq; using System.Xml; using System.Xml.Linq; using System.Xml.Schema; static class Extensions { public static XElement ValidateXsd(this XElement source, string xsdPath) { var errors = new XElement("Errors"); // Reference: http://msdn.microsoft.com/en-us/library/bb358456.aspx var schemas = new XmlSchemaSet(); using (var reader = XmlReader.Create(xsdPath)) { schemas.Add("", reader); } var sourceQualifiedName = new XmlQualifiedName(source.Name.LocalName, source.Name.NamespaceName); source.Validate( schemas.GlobalElements[sourceQualifiedName], schemas, // Validation Event/Error Handling (sender, e) => { var message = e.Message.Replace( "element is invalid - The value '' is invalid according to its datatype 'requiredString' - The actual length is less than the MinLength value.", "cannot be blank.").Replace( "is invalid according to its datatype 'size' - The Pattern constraint failed.", "must be numeric.").Replace("element is invalid", "is invalid."); errors.Add(new XElement("Error", message)); }); // If there were errors return them, otherwise return null return errors.Elements().Count() > 0 ? errors : null; } }