2020-09-22

        /// <summary>
        /// csv文件数据保存
        /// </summary>
        /// <param name="FullPath"></param>
        /// <param name="ArrayData"></param>
        /// <returns></returns>
        public static bool SaveCSVData(string FullPath, string dataStr)
        {
            StringBuilder DataColumn = new StringBuilder();
            StringBuilder DataLine = new StringBuilder();
            string currentTime = System.DateTime.Now.ToString(); // 当前时间
            string SN = "SN"; // 二维码
            //列标题
            DataColumn.Append("SN,DateTime,data1,data2,data3,");
            //行数据
            DataLine.Append(SN +"," + currentTime + "," + dataStr + ",");
            string FilePath = Application.StartupPath + FullPath + ".CSV"; ;

            if (System.IO.File.Exists(FilePath) == false)
            {
                // 如果表格不存在，则创建表格
                System.IO.StreamWriter stream = new System.IO.StreamWriter(FilePath, false, Encoding.UTF8);
                stream.WriteLine(DataColumn);  // 列标题
                stream.WriteLine(DataLine); //行数据
                stream.Flush();
                stream.Close();
                stream.Dispose();
            }
            else
            {
                // 若表格存在，直接存储数据
                System.IO.StreamWriter stream = new System.IO.StreamWriter(FilePath, true, Encoding.UTF8);
                stream.WriteLine(DataLine); //行数据
                stream.Flush();
                stream.Close();
                stream.Dispose();
            }

            return true;
        }




// 测试使用-1

 string dataStr= "10,20,30";
 SaveCSVData("/test", dataStr);

// 测试使用-2
  string dataStr2="";
  for (int i = 0; i < 3; i++)
     {
       dataStr2 += i.ToString()+",";  // ToString(),将数字转化为字符串
     }
     SaveCSVData("/test", dataStr2);