public void ExportTxt()
        {
            string SaveOrderPath = System.Configuration.ConfigurationManager.AppSettings["BMBExportTxtPath"].ToString();//获取要导出文件的路径
            string OrderNameTxT =txtOrderNO.Text+"-"+ DateTime.Now.Year+"-" + DateTime.Now.Month +"-"+ DateTime.Now.Day +"-"+ DateTime.Now.Hour +"-"+ DateTime.Now.Minute +"-"+ DateTime.Now.Second+ "-" + "CLA"+ ".txt"; //导出文件TxT 
            StreamWriter sw=null;
            try
            {
                if (SaveOrderPath.Substring(SaveOrderPath.Length - 1) == "\\")//Substring是截取判断
          {
         SaveOrderPath
= SaveOrderPath + OrderNameTxT;
        }
第一步写入的头部
}

 

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