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>
/// 提供公共函數(shù)和方法供整個應用程序使用
/// </summary>
public class Util
{
    private static Object lockObj = new Object();
    /// <summary>
    /// 當xml驗證發(fā)生錯誤時的回調(diào)函數(shù)
    /// </summary>
    private static void ValidationEventHandler(object sender, ValidationEventArgs e)
    {
        lock (lockObj)
        {
            switch (e.Severity)
            {
                case XmlSeverityType.Error:
                    break;

                case XmlSeverityType.Warning:
                    break;
            }
        }
    }
    /// <summary>
    /// 驗證Xml文件是否格式良好，確定配置文件。
    /// </summary>
    private static void ValidateXml(string xmlFilePath, string schemaFilePath)
    {
        //創(chuàng)建一個XmlSchemaSet，并且將指定路徑的Schema文件添加到settings.Schemas.
        XmlSchemaSet schema = new XmlSchemaSet();
        schema.Add(null, schemaFilePath);
        XmlReaderSettings settings = new XmlReaderSettings();
        settings.ValidationType = ValidationType.Schema;
        settings.Schemas.Add(schema);
        // 解析XML數(shù)據(jù)文件。并用指定的Sechema進行驗證。
        using (XmlReader reader = XmlReader.Create(xmlFilePath, settings))
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(reader);
            ValidationEventHandler eventHandler = new ValidationEventHandler(ValidationEventHandler);
            xmlDoc.Validate(eventHandler);
        }
    }
    /// <summary>
    /// 讀取xmlFilePath中的XML文件，并使用指定的方案文件進行驗證。并返回包含了XML文件數(shù)據(jù)的DataSet.    
    /// </summary>
    public static DataSet ReadAndValidateXml(string xmlFilePath, string schemaFilePath)
    {
        DataSet dataSet = null;
        //先對該文件和Schema進行驗證操作。
        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))
            {
                //調(diào)用DataSet的ReadXmlSchema方法首先讀取Secham，再加載數(shù)據(jù)。
                dataSet = new DataSet();
                dataSet.ReadXmlSchema(fs_xsd);
                dataSet.ReadXml(fs_xml, XmlReadMode.IgnoreSchema);
            }
        }
        //返回該DataSet.
        return dataSet;
    }
}