How to Validate XML against a Referenced XSD Schema in C#?

C# XML Validation Against Referenced XSD Schema

Ensuring XML document validity against a defined schema is crucial. This article demonstrates C# XML validation using the XmlDocument class against an XSD schema.

Unlike default behavior, XmlDocument doesn't automatically validate against schemas embedded within the XML. To enable this, we'll configure XmlReaderSettings. Specifically, we set ValidationType to Schema and utilize ValidationFlags to process inline schemas, schema locations, and report warnings.

<code class="language-csharp">XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationType = ValidationType.Schema;
settings.ValidationFlags |= XmlSchemaValidationFlags.ProcessInlineSchema;
settings.ValidationFlags |= XmlSchemaValidationFlags.ProcessSchemaLocation;
settings.ValidationFlags |= XmlSchemaValidationFlags.ReportValidationWarnings;</code>

Next, create an XmlReader using these settings and register a ValidationEventHandler to capture validation results.

<code class="language-csharp">XmlReader reader = XmlReader.Create("inlineSchema.xml", settings);
reader.ValidationEventHandler += new ValidationEventHandler(ValidationCallBack);</code>

The ValidationCallBack method processes validation events:

<code class="language-csharp">private static void ValidationCallBack(object sender, ValidationEventArgs args)
{
    if (args.Severity == XmlSeverityType.Warning)
        Console.WriteLine("\tWarning: " + args.Message);
    else
        Console.WriteLine("\tValidation error: " + args.Message);
}</code>

This streamlined method automatically validates the XML against its embedded schema, eliminating the need for manual schema loading into the XmlDocument object. The ValidationCallBack function provides clear warnings and error messages.

The above is the detailed content of How to Validate XML against a Referenced XSD Schema in C#?. For more information, please follow other related articles on the PHP Chinese website!