好用的XML Log类

最近做个轻量级的项目,觉得Log4net配置太烦琐 找了个Log类跟大家分享下

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;

namespace Utility
{
    public static class LogWriter
    {
        #region Private Fields
        private static XmlDocument xmlDocument = new XmlDocument();
        private static string xmlFileName = "";
        #endregion

        #region Private Methods
        private static bool HasChild(string name, XmlNode node)
        {

            XmlNodeList xmlnodelist = node.ChildNodes;

            foreach (XmlNode enode in xmlnodelist)
            {

                if (enode.Name.ToLower() == name.ToLower())
                {

                    return true;

                }

            }

            return false;

        }

        private static string FormatInt(int num)
        {

            string formattedString = "";

            if (num <= 9)
            {

                formattedString = "0" + num.ToString();

            }

            else
            {

                formattedString = num.ToString();

            }
            return formattedString;

        }

        private static string GetFileName()
        {

            string year = DateTime.Now.Year.ToString();

            string month = FormatInt(DateTime.Now.Month);

            string day = FormatInt(DateTime.Now.Day);

            string path = "./Logs/";

            string file = path + "Log_" + year + month + day + ".xml";
            return file;

        }
        /**/

        /// <summary>   

        /// create log file path   

        /// </summary>   

        private static void CreateLogFile()
        {

            string xmlRootElementStr = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n\r\n";

            xmlRootElementStr += "<Log>\r\n\r\n";

            xmlRootElementStr += "  <Server>\r\n\r\n";

            xmlRootElementStr += "      <Infomations>\r\n\r\n";

            xmlRootElementStr += "      </Infomations>\r\n\r\n";

            xmlRootElementStr += "  </Server>\r\n\r\n";

            xmlRootElementStr += "  <System>\r\n";

            xmlRootElementStr += "      <Exceptions>\r\n";

            xmlRootElementStr += "      </Exceptions>\r\n";

            xmlRootElementStr += "  </System>\r\n\r\n";

            xmlRootElementStr += "  <Sql>\r\n";

            xmlRootElementStr += "      <Exceptions>\r\n";

            xmlRootElementStr += "      </Exceptions>\r\n";

            xmlRootElementStr += "  </Sql>\r\n\r\n";

            xmlRootElementStr += "</Log>\r\n";

            xmlFileName = GetFileName();

            try
            {

                //if file inexistence,create a new log file and load this file   

                if (!System.IO.Directory.Exists("Logs"))
                {

                    Directory.CreateDirectory("Logs");
                    // File.Create(xmlFileName);   
                    byte[] xmlRootElementByte = System.Text.Encoding.Default.GetBytes(xmlRootElementStr);

                    System.IO.FileStream fileStream = new FileStream(xmlFileName, FileMode.Create, FileAccess.ReadWrite);

                    fileStream.Write(xmlRootElementByte, 0, xmlRootElementByte.Length);

                    fileStream.Close();

                    xmlDocument.Load(xmlFileName);

                }

                else
                {

                    if (!System.IO.File.Exists(xmlFileName))
                    {

                        // File.Create(xmlFileName);   

                        byte[] xmlRootElementByte = System.Text.Encoding.Default.GetBytes(xmlRootElementStr);

                        System.IO.FileStream fileStream = new System.IO.FileStream(xmlFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);

                        fileStream.Write(xmlRootElementByte, 0, xmlRootElementByte.Length);

                        fileStream.Close();

                        xmlDocument.Load(xmlFileName);

                    }

                    else
                    {

                        xmlDocument.Load(xmlFileName);

                    }

                }

            }

            catch (Exception ex)
            {

                throw ex;

            }

        }

        #endregion        #region Public Methods

        /**/

        /// <summary>   

        /// record a system exception to log   

        /// </summary>   

        /// <param name="ex"></param>   

        public static void AddSystemException(Exception ex)
        {

            try
            {

                //Get    

                CreateLogFile();
                XmlNode xmlNode = xmlDocument.SelectSingleNode("//System//Exceptions");

                if (!HasChild("exception", xmlNode))
                {

                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");
                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");
                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");
                    DateTime dateTime = DateTime.Now;
                    string messageString = ex.Message;
                    string sourceString = ex.Source;
                    string stacktrace = ex.StackTrace;
                    timeNode.InnerText = dateTime.ToString();
                    messageNode.InnerText = messageString;
                    sourceNode.InnerText = sourceString;
                    stacktraceNode.InnerText = stacktrace;
                    exceptionNode.AppendChild(timeNode);
                    exceptionNode.AppendChild(messageNode);
                    exceptionNode.AppendChild(sourceNode);
                    exceptionNode.AppendChild(stacktraceNode);
                    xmlNode.AppendChild(exceptionNode);

                }

                else
                {

                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");
                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");
                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");
                    DateTime dateTime = DateTime.Now;
                    string messageString = ex.Message;
                    string sourceString = ex.Source;
                    string stacktrace = ex.StackTrace;
                    timeNode.InnerText = dateTime.ToString();
                    messageNode.InnerText = messageString;
                    sourceNode.InnerText = sourceString;
                    stacktraceNode.InnerText = stacktrace;
                    exceptionNode.AppendChild(timeNode);
                    exceptionNode.AppendChild(messageNode);
                    exceptionNode.AppendChild(sourceNode);
                    exceptionNode.AppendChild(stacktraceNode);
                    xmlNode.AppendChild(exceptionNode);
                }
                xmlDocument.Save(xmlFileName);

            }

            catch (Exception e)
            {

                throw e;

            }

        }
        // record a sql exception to log   

        public static void AddSqlException(Exception ex)
        {

            //Get   

            try
            {

                CreateLogFile();
                XmlNode xmlNode = xmlDocument.SelectSingleNode("//Sql//Exceptions");

                if (!HasChild("exception", xmlNode))
                {
                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");
                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");
                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");
                    DateTime dateTime = DateTime.Now;
                    string messageString = ex.Message;
                    string sourceString = ex.Source;
                    string stacktrace = ex.StackTrace;
                    timeNode.InnerText = dateTime.ToString();
                    messageNode.InnerText = messageString;
                    sourceNode.InnerText = sourceString;
                    stacktraceNode.InnerText = stacktrace;
                    exceptionNode.AppendChild(timeNode);
                    exceptionNode.AppendChild(messageNode);
                    exceptionNode.AppendChild(sourceNode);
                    exceptionNode.AppendChild(stacktraceNode);
                    xmlNode.AppendChild(exceptionNode);

                }

                else
                {

                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");
                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");
                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");
                    DateTime dateTime = DateTime.Now;
                    string messageString = ex.Message;
                    string sourceString = ex.Source;
                    string stacktrace = ex.StackTrace;
                    timeNode.InnerText = dateTime.ToString();
                    messageNode.InnerText = messageString;
                    sourceNode.InnerText = sourceString;
                    stacktraceNode.InnerText = stacktrace;
                    exceptionNode.AppendChild(timeNode);
                    exceptionNode.AppendChild(messageNode);
                    exceptionNode.AppendChild(sourceNode);
                    exceptionNode.AppendChild(stacktraceNode);
                    xmlNode.AppendChild(exceptionNode);

                } xmlDocument.Save(xmlFileName);

            }

            catch (Exception e)
            {

                throw e;

            }

        }

        // record a sql exception to log   

        public static void AddSqlException(Exception ex, string sqltxt)
        {

            try
            {

                //Get    

                CreateLogFile();
                XmlNode xmlNode = xmlDocument.SelectSingleNode("//Sql//Exceptions");

                if (!HasChild("exception", xmlNode))
                {

                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");

                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");

                    XmlElement sourceNode = xmlDocument.CreateElement("Source");

                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");

                    XmlElement sqltxtNode = xmlDocument.CreateElement("SQL_Text"); DateTime dateTime = DateTime.Now;

                    string messageString = ex.Message;

                    string sourceString = ex.Source;

                    string stacktrace = ex.StackTrace;

                    timeNode.InnerText = dateTime.ToString();

                    messageNode.InnerText = messageString;

                    sourceNode.InnerText = sourceString;

                    stacktraceNode.InnerText = stacktrace;

                    sqltxtNode.InnerText = sqltxt;
                    exceptionNode.AppendChild(timeNode);

                    exceptionNode.AppendChild(messageNode);

                    exceptionNode.AppendChild(sourceNode);

                    exceptionNode.AppendChild(stacktraceNode);

                    exceptionNode.AppendChild(sqltxtNode);
                    xmlNode.AppendChild(exceptionNode);

                }

                else
                {

                    XmlElement exceptionNode = xmlDocument.CreateElement("exception");
                    XmlElement timeNode = xmlDocument.CreateElement("Time");
                    XmlElement messageNode = xmlDocument.CreateElement("Message");

                    XmlElement sourceNode = xmlDocument.CreateElement("Source");

                    XmlElement stacktraceNode = xmlDocument.CreateElement("StackTrace");

                    XmlElement sqltxtNode = xmlDocument.CreateElement("SQL_Text");
                    DateTime dateTime = DateTime.Now;

                    string messageString = ex.Message;

                    string sourceString = ex.Source;

                    string stacktrace = ex.StackTrace;
                    timeNode.InnerText = dateTime.ToString();
                    messageNode.InnerText = messageString;

                    sourceNode.InnerText = sourceString;

                    stacktraceNode.InnerText = stacktrace;

                    sqltxtNode.InnerText = sqltxt;
                    exceptionNode.AppendChild(timeNode);

                    exceptionNode.AppendChild(messageNode);

                    exceptionNode.AppendChild(sourceNode);

                    exceptionNode.AppendChild(stacktraceNode);

                    exceptionNode.AppendChild(sqltxtNode);
                    xmlNode.AppendChild(exceptionNode);

                } xmlDocument.Save(xmlFileName);

            }

            catch (Exception e)
            {

                throw e;

            }

        }

        public static void AddServerInfo(String msg, String src)
        {

            try
            {

                //Get    

                CreateLogFile();
                XmlNode xmlNode = xmlDocument.SelectSingleNode("//Server//Infomations");

                if (!HasChild("Info", xmlNode))
                {

                    XmlElement infoNode = xmlDocument.CreateElement("Info");

                    XmlElement timeNode = xmlDocument.CreateElement("Time");

                    XmlElement messageNode = xmlDocument.CreateElement("Message");

                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    DateTime dateTime = DateTime.Now;

                    string messageString = msg;

                    string sourceString = src; timeNode.InnerText = dateTime.ToString();

                    messageNode.InnerText = messageString;

                    sourceNode.InnerText = sourceString; infoNode.AppendChild(timeNode);

                    infoNode.AppendChild(messageNode);

                    infoNode.AppendChild(sourceNode);
                    xmlNode.AppendChild(infoNode);

                }

                else
                {

                    XmlElement infoNode = xmlDocument.CreateElement("Info");

                    XmlElement timeNode = xmlDocument.CreateElement("Time");

                    XmlElement messageNode = xmlDocument.CreateElement("Message");

                    XmlElement sourceNode = xmlDocument.CreateElement("Source");
                    DateTime dateTime = DateTime.Now;

                    string messageString = msg;

                    string sourceString = src;
                    timeNode.InnerText = dateTime.ToString();

                    messageNode.InnerText = messageString;

                    sourceNode.InnerText = sourceString; infoNode.AppendChild(timeNode);

                    infoNode.AppendChild(messageNode);

                    infoNode.AppendChild(sourceNode);

                    xmlNode.AppendChild(infoNode);

                } xmlDocument.Save(xmlFileName);
            }

            catch (Exception e)
            {

                throw e;

            }

        }


    }
}