在指定路径下创建文件

在刚开始做程序员时很多东西都需要从网上查询，试N多种才可以找到符合自己的。

现在这个时间我想分享的就是创建文件。

        /// <summary>
        /// 写日常日志,每月一个日常日志文件
        /// </summary>
        /// <param name="filename">自定义文件名字</param>
        /// <param name="message">日志内容</param>
        public static void WriteCommonLog(string filename, string message)
        {
            try
            {
                if (message != "" && filename != "")
                {
                    string filepath = System.Web.HttpContext.Current.Server.MapPath("~/framework/Log/");//Server.MapPath获得的路径都是服务器上的物理路径，也就是常说的绝对路径
                    if (!System.IO.Directory.Exists(filepath))
                    {
                        System.IO.Directory.CreateDirectory(filepath);
                    }
                    filepath += "log_" + DateTime.Now.Year + "." + DateTime.Now.Month + "." + filename + ".txt";
                    if (!System.IO.File.Exists(filepath))
                    {
                        using (System.IO.FileStream filestream = new System.IO.FileStream(filepath, System.IO.FileMode.Create))
                        {
                            filestream.Close();
                        }
                    }
                    try
                    {
                        using (System.IO.StreamWriter sw = new System.IO.StreamWriter(filepath, true))
                        {
                            sw.WriteLine(DateTime.Now);
                            sw.WriteLine(message);
                            sw.WriteLine("");
                            sw.Close();
                        }
                    }
                    catch { }
                }
            }
            catch { }
        }