这个类命名叫Message.cs

namespace Common
{public class Message{/// <summary>/// 信息编号/// </summary>private string messagecode = string.Empty;public string MessageCode{get { return messagecode; }}/// <summary>/// 信息描述/// </summary>private string messagedata = string.Empty;public string MessageData{get { return messagedata; }}public void Setmessagedata(string value) {messagedata = value;}public Message(string mc,int x) {this.messagedata = mc;}/// <summary>/// 构造函数/// </summary>/// <param name="mc">信息编号</param>public Message(string mc){this.messagecode = mc;using (System.Data.DataSet ds = XMLHelp.ConvertXMLFileToDataSet(System.Configuration.ConfigurationManager.AppSettings["MessagePath"])){if (ds.Tables[0] != null){for (int i = 0; i < ds.Tables[0].Rows.Count; i++){if (ds.Tables[0].Rows[i]["Code"].ToString() == mc){this.messagedata = ds.Tables[0].Rows[i]["Content"].ToString();break;}}}}}}
}

using System;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;
using System.Web;namespace Common
{public class XMLHelp{/// <summary>/// 将xml文件转换为DataSet/// </summary>/// <param name="xmlFile">XML文件路径</param>/// <returns>DataSet</returns>public static DataSet ConvertXMLFileToDataSet(string xmlFile){StringReader sReader = null;XmlTextReader reader = null;try{XmlDocument xDoc = new XmlDocument();try{xDoc.Load(xmlFile);}catch (DirectoryNotFoundException){xmlFile = Path.Combine(HttpContext.Current.Server.MapPath("~"), xmlFile);xDoc.Load(xmlFile);}DataSet dResult = new DataSet();sReader = new StringReader(xDoc.InnerXml);reader = new XmlTextReader(sReader);dResult.ReadXml(reader);return dResult;}catch (Exception ex){throw ex;}finally{if (reader != null) reader.Close();}}/// <summary>/// 将DataSet转换为xml文件/// </summary>/// <param name="ds"></param>/// <param name="xmlFile"></param>public static void ConvertDataSetToXMLFile(DataSet ds, string xmlFile){MemoryStream stream = null;XmlTextWriter writer = null;try{stream = new MemoryStream();//从stream装载到XmlTextReaderwriter = new XmlTextWriter(stream, Encoding.Unicode);//用WriteXml方法写入文件.ds.WriteXml(writer);int count = (int)stream.Length;byte[] arr = new byte[count];stream.Seek(0, SeekOrigin.Begin);stream.Read(arr, 0, count);//返回Unicode编码的文本UnicodeEncoding utf = new UnicodeEncoding();StreamWriter sw = new StreamWriter(xmlFile);sw.WriteLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");sw.WriteLine(utf.GetString(arr).Trim());sw.Close();}catch (System.Exception ex){throw ex;}finally{if (writer != null) writer.Close();}}}
}