util.cs

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using System;
using System.Web;
//using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.Xml.Schema;
using System.Data;
using System.IO;

/// <summary>
/// Provides util functions
/// </summary>
public class Util
{
    private static Object lockObj = new Object();

    /// <summary>
    /// Callback function invoked on xml validation errors
    /// </summary>
    private static void ValidationEventHandler(object sender, ValidationEventArgs e)
    {
        lock (lockObj)
        {
            switch (e.Severity)
            {
                case XmlSeverityType.Error:
                    break;

                case XmlSeverityType.Warning:
                    break;
            }
        }
    }


    /// <summary>
    /// Validates the xml file well formed and confirms to the schema 
    /// function is static as used by other classes as well
    /// </summary>
    private static void ValidateXml(string xmlFilePath, string schemaFilePath)
    {
        // create a schema set and copy it to settings.Schemas
        XmlSchemaSet schema = new XmlSchemaSet();
        schema.Add(null, schemaFilePath);

        XmlReaderSettings settings = new XmlReaderSettings();
        settings.ValidationType = ValidationType.Schema;
        settings.Schemas.Add(schema);

        // Parse the xml data file. 
        using (XmlReader reader = XmlReader.Create(xmlFilePath, settings))
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(reader);
            ValidationEventHandler eventHandler = new ValidationEventHandler(ValidationEventHandler);
            xmlDoc.Validate(eventHandler);
        }
    }


    /// <summary>
    /// Reads the 'xmlFilePath' and validates it against the scehma in 'schemaFilePath'. Returns dataset containing xml file data
    /// </summary>
    public static DataSet ReadAndValidateXml(string xmlFilePath, string schemaFilePath)
    {
        DataSet dataSet = null;
        Util.ValidateXml(xmlFilePath, schemaFilePath);
        using (FileStream fs_xml = new FileStream(xmlFilePath, FileMode.Open, FileAccess.Read))
        {
            using (FileStream fs_xsd = new FileStream(schemaFilePath, FileMode.Open, FileAccess.Read))
            {
                dataSet = new DataSet();
                dataSet.ReadXmlSchema(fs_xsd);
                dataSet.ReadXml(fs_xml, XmlReadMode.IgnoreSchema);
            }
        }

        return dataSet;
    }
}