Question

I getting xml through web service in string format and to pass through xmlreader, I am converting the string to a stream object. But cannot figure out what I am missing. The xml and schema mentioned here is a sample.

class Program
{
    static void Main(string[] args)
    {
        try
        {

            XmlDocument doc = new XmlDocument();

            doc.Load("books.xml");
            StringWriter sw = new StringWriter();
            XmlTextWriter tx = new XmlTextWriter(sw);
            doc.WriteTo(tx);
            string leadxml = sw.ToString();

            XmlReaderSettings xmlSettings = new XmlReaderSettings();
            xmlSettings.Schemas = new System.Xml.Schema.XmlSchemaSet();
            xmlSettings.Schemas.Add(string.Empty,"books.xsd");
            xmlSettings.ValidationType = ValidationType.Schema;
            byte[] byteArray = Encoding.ASCII.GetBytes(leadxml);
            MemoryStream stream = new MemoryStream(byteArray);
            XmlReader reader = XmlReader.Create(stream, xmlSettings);

            // Parse the file.
            while (reader.Read());


        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);

        }
    }

}

xml is:

 <?xml version="1.0" encoding="utf-8" ?>
<bookstore>
  <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0"/>
</bookstore>

xsd is:

    <?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="bookstore">
    <xs:complexType>
      <xs:sequence>
        <xs:element maxOccurs="unbounded" name="book">

        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

Answer 1

First of all, if all your doing is getting the Xml into a string, this entire block of code is unnecessary:

          XmlDocument doc = new XmlDocument();
          doc.Load("books.xml");
          StringWriter sw = new StringWriter();
          XmlTextWriter tx = new XmlTextWriter(sw);
          doc.WriteTo(tx);
          string leadxml = sw.ToString();

Instead just do:

          string leadxml = File.ReadAllText("books.xml");

Secondly, if you have a string already, it is completely unnecessary to do all this conversion on the string. The XmlReader.Create method has a signature which accepts a TextReader. StringReader derives from TextReader. Therefore, this:

             byte[] byteArray = Encoding.ASCII.GetBytes(leadxml);
             MemoryStream stream = new MemoryStream(byteArray);
             XmlReader reader = XmlReader.Create(stream, xmlSettings);

Can be replaced with this:

             StringReader leadxmlStringReader = new StringReader(leadXml);
             XmlReader reader = XmlReader.Create(leadxmlStringReader, xmlSettings);

For any further assistance with this question, you will need to provide Exception details and/or specific error messages.