错误日志记录代码

    using System.IO;
    
    public class PublicWriteError
    {
        private static StreamWriter streamWriter;
       /// <summary>
       /// 
       /// </summary>
       /// <param name="message">报错信息</param>
       /// <param name="type"></param>
       /// <param name="FFname">方法名称</param>
        public static void WriteError(string message, string type, string FFname)
        {
            try
            {
                //DateTime dt = new DateTime();  
                string directPath = "D://DJErrorLog";    //在获得文件夹路径  
                //string directPath = AppDomain.CurrentDomain.BaseDirectory+"/log";
                if (!Directory.Exists(directPath))   //判断文件夹是否存在，如果不存在则创建  
                {
                    Directory.CreateDirectory(directPath);
                }
                directPath += string.Format(@"{0}.log", DateTime.Now.ToString("yyyy-MM-dd"));
                if (streamWriter == null)
                {
                    streamWriter = !File.Exists(directPath) ? File.CreateText(directPath) : File.AppendText(directPath);    //判断文件是否存在如果不存在则创建，如果存在则添加。  
                }
                streamWriter.WriteLine("***********************************************************************");
                streamWriter.WriteLine(DateTime.Now.ToString("HH:mm:ss"));
                streamWriter.WriteLine("输出信息：" + type + "");
                streamWriter.WriteLine("方法名称：" + FFname + "");
                if (message != null)
                {
                    streamWriter.WriteLine("信息：
" + message);
                }
            }
            finally
            {
                if (streamWriter != null)
                {
                    streamWriter.Flush();
                    streamWriter.Dispose();
                    streamWriter = null;
                }
            }
        }

       /// <summary>
       /// 
       /// </summary>
       /// <param name="ex"></param>
       /// <param name="Message">报错信息</param>
       /// <param name="FFname">方法名称</param>
        public static void WriteError(Exception ex, string Message, string FFname)
        {
            try
            {
                //DateTime dt = new DateTime();  
                string directPath = "D://DJErrorLog";    //在获得文件夹路径  
                //string directPath = AppDomain.CurrentDomain.BaseDirectory+"/log";
                if (!Directory.Exists(directPath))   //判断文件夹是否存在，如果不存在则创建  
                {
                    Directory.CreateDirectory(directPath);
                }
                directPath += string.Format(@"{0}.log", DateTime.Now.ToString("yyyy-MM-dd"));
                if (streamWriter == null)
                {
                    streamWriter = !File.Exists(directPath) ? File.CreateText(directPath) : File.AppendText(directPath);    //判断文件是否存在如果不存在则创建，如果存在则添加。  
                }
                streamWriter.WriteLine("***********************************************************************");
                streamWriter.WriteLine(DateTime.Now.ToString("HH:mm:ss"));
                streamWriter.WriteLine("输出信息：" + Message + "");
                streamWriter.WriteLine("方法名称：" + FFname + "");
                streamWriter.WriteLine("错误信息：
" + ex.Message);
                streamWriter.WriteLine("栈堆信息：
" + ex.StackTrace);
            }
            finally
            {
                if (streamWriter != null)
                {
                    streamWriter.Flush();
                    streamWriter.Dispose();
                    streamWriter = null;
                }
            }
        }

       /// <summary>
       /// 
       /// </summary>
       /// <param name="ex"></param>
       /// <param name="FFname">方法名称</param>
        public static void WriteError(Exception ex, string FFname)
        {
            try
            {
                //DateTime dt = new DateTime();  
                string directPath = "D://DJErrorLog";    //在获得文件夹路径  
                //string directPath = AppDomain.CurrentDomain.BaseDirectory+"/log";
                if (!Directory.Exists(directPath))   //判断文件夹是否存在，如果不存在则创建  
                {
                    Directory.CreateDirectory(directPath);
                }
                directPath += string.Format(@"{0}.log", DateTime.Now.ToString("yyyy-MM-dd"));
                if (streamWriter == null)
                {
                    streamWriter = !File.Exists(directPath) ? File.CreateText(directPath) : File.AppendText(directPath);    //判断文件是否存在如果不存在则创建，如果存在则添加。  
                }
                streamWriter.WriteLine("***********************************************************************");
                streamWriter.WriteLine(DateTime.Now.ToString("HH:mm:ss"));
                streamWriter.WriteLine("输出信息：错误信息");
                streamWriter.WriteLine("方法名称：" + FFname + "");
                streamWriter.WriteLine("错误信息：
" + ex.Message);
                streamWriter.WriteLine("栈堆信息：
" + ex.StackTrace);
            }
            finally
            {
                if (streamWriter != null)
                {
                    streamWriter.Flush();
                    streamWriter.Dispose();
                    streamWriter = null;
                }
            }
        }
    }