WriteLog

public class WriteLog
    {
        /// <summary>
        /// 創建日誌文件
        /// </summary>
        /// <param name="ex">異常類</param>
        public static void CreateLog(Exception ex)
        {
            string path = Application.StartupPath+"\\log";
            if (!Directory.Exists(path))
            {
                //創建日誌文件夾
                Directory.CreateDirectory(path);
            }
            //發生異常每天都創建一個單獨的日子文件[*.log],每天的錯誤信息都在這一個文件里。方便查找
            path += "\\"+DateTime.Now.ToShortDateString() + ".log";
            WriteLogInfo(ex, path);
        }
        /// <summary>
        /// 寫日誌信息
        /// </summary>
        /// <param name="ex">異常類</param>
        /// <param name="path">日誌文件存放路徑</param>
        private static void WriteLogInfo(Exception ex, string path)
        {
            using (StreamWriter sw = new StreamWriter(path, true, Encoding.Default))
            {
                sw.WriteLine("*****************************************【"
                               + DateTime.Now.ToLongTimeString()
                               + "】*****************************************");
                if (ex != null)
                {
                    sw.WriteLine("【ErrorType】" + ex.GetType());
                    sw.WriteLine("【TargetSite】" + ex.TargetSite);
                    sw.WriteLine("【Message】" + ex.Message);
                    sw.WriteLine("【Source】" + ex.Source);
                    sw.WriteLine("【StackTrace】" + ex.StackTrace);
                }
                else
                {
                    sw.WriteLine("Exception is NULL");
                }
                sw.WriteLine();
            }
        }
    }