Question

I need to add some tags to an existing XML schema and write it to file. However, I need to add tags to every of the existing schema. What is the best way to accomplish it in C#?

Thanks!

I have the following code that parses the schema:

        /// <summary>     /// Iterates over all elements in a XmlSchema and prints them out     /// </summary>     /// <param name='schema'></param>     private void IterateOverSchemaElements(XmlSchema schema)     {         XmlSchemaComplexType complex;         foreach (XmlSchemaObject schemaObj in schema.Items)         {             complex = schemaObj as XmlSchemaComplexType;             if (complex != null)             {                 if (OutputTextDelegate != null)                 {                     OutputTextDelegate(string.Format('ComplexType: {0}', complex.Name));                 }                 complex.Annotation = new XmlSchemaAnnotation();                                     //Get sequence of the complextype:                 XmlSchemaSequence sequence = complex.ContentTypeParticle as XmlSchemaSequence;                 if (sequence != null)                 {                     // Iterate over each XmlSchemaElement in the Items collection.                     foreach (XmlSchemaElement childElement in sequence.Items)                     {                         if (OutputTextDelegate != null)                         {                             OutputTextDelegate(string.Format('--Element: {0}', childElement.Name));                         }                                                 }                 }             }         }     } 

Answer 1

You may be better off manipulating the schema as an XML document, not as a schema. For instance, this code creates an annotation under every element definition that’s part of a sequence in a complex type:

const string uri = 'http://www.w3.org/2001/XMLSchema'; XmlDocument d = new XmlDocument(); d.Load(path); XmlNamespaceManager ns = new XmlNamespaceManager(d.NameTable); ns.AddNamespace('xs', uri);  foreach (XmlElement ct in d.SelectNodes('//xs:complexType', ns)) {     foreach (XmlElement e in ct.SelectNodes('xs:sequence/xs:element', ns))     {         XmlElement a = d.CreateElement('xs', 'annotation', uri);         a.InnerText = String.Format(             'Complex type: {0}; Element name: {1}',             ct.GetAttribute('name'),             e.GetAttribute('name'));         e.AppendChild(a);     } }