测试程序的时候用到写参数或者错误日志的几个方法，用来方便发现错误

/// <summary>
    /// 写接口日志类（by mo）
    /// </summary>
    public class LogWrite
    {
        /// <summary>
        /// 写异常日志
        /// </summary>
        /// <param name="path">相对路径（"~/log"）</param>
        /// <param name="content">异常内容</param>
        /// <param name="filename">文件名（不能带后缀格式，默认保存txt文本）</param>
        public static void WriteBug(string path, string content, string filename)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("----------bug日志--------
");
            sb.AppendFormat("时间：{0}
异常内容：{1}

", DateTime.Now.ToString("yyyy-MM-dd HH:mm"), content);
            if (!System.IO.Directory.Exists(HttpContext.Current.Server.MapPath(path)))
            {
                System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath(path));
            }
            System.IO.File.AppendAllText(HttpContext.Current.Server.MapPath(path + filename + ".txt"), sb.ToString(), System.Text.Encoding.Default);
        }
        /// <summary>
        /// 写请求参数日志(用于接口调用)
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="title">标题</param>
        /// <param name="content">内容</param>
        /// <param name="filename">文件名（不能带后缀格式，默认保存txt文本）</param>
        public static void WriteRequstParameters(string path, string title, string content, string filename)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("----------{0}--------
", title);
            sb.AppendFormat("请求时间={0},{1}

", DateTime.Now.ToString("yyyy-MM-dd HH:mm"), content);
            if (!System.IO.Directory.Exists(HttpContext.Current.Server.MapPath(path)))
            {
                System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath(path));
            }
            System.IO.File.AppendAllText(HttpContext.Current.Server.MapPath(path + filename + ".txt"), sb.ToString(), System.Text.Encoding.Default);
        }
        /// <summary>
        /// 写所有请求参数日志
        /// </summary>
        /// <param name="path">相对路径</param>
        /// <param name="title">标题</param>
        /// <param name="filename">文件名（不能带后缀格式，默认保存txt文本）</param>
        public static void WriteRequstStream(string path, string title, string filename)
        {
            string a = string.Empty;
            using (System.IO.Stream stream = System.Web.HttpContext.Current.Request.InputStream)
            {
                using (System.IO.StreamReader sr = new System.IO.StreamReader(stream))
                {
                    a = sr.ReadToEnd();
                }
            }
            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("----------{0}--------
", title);
            sb.AppendFormat("请求时间:{0},
请求参数:{1}

", DateTime.Now.ToString("yyyy-MM-dd HH:mm"), a);
            if (!System.IO.Directory.Exists(HttpContext.Current.Server.MapPath(path)))
            {
                System.IO.Directory.CreateDirectory(HttpContext.Current.Server.MapPath(path));
            }
            System.IO.File.AppendAllText(HttpContext.Current.Server.MapPath(path + filename + ".txt"), sb.ToString(), System.Text.Encoding.Default);
        }
    }