updown/jellyfish/demo/ClassHelper/CSV/CsvHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.IO;
using System.Collections;

namespace demo.ClassHelper.CSV
{
    public struct dataLog
    {//SITEID,PROJECTID,MACHINEID,DATE,TIME,LOT NAME,LOGIN MODE,KEYWORD,ERROR CODE,ERROR MESSAGE,MESSAGE
        public string SITEID;
        public string PROJECTID;
        public string MACHINEID;
        public string DATE;
        public string TIME;
        public string LOTNAME;
        public string LOGINMODE;
        public string KEYWORD;
        public string ERRORCODE;
        public string ERRORMESSAGE;
        public string MESSAGE;
    }


    class CsvHelper
    {
        /// <summary>
        /// 导出报表为Csv
        /// </summary>
        /// <param name="dt">DataTable</param>
        /// <param name="strFilePath">物理路径</param>
        /// <param name="tableheader">表头</param>
        /// <param name="columname">字段标题,逗号分隔</param>
        public static bool dt2csv(DataTable dt, string strFilePath, string tableheader, string columname)
        {
            try
            {
                string strBufferLine = "";
                StreamWriter strmWriterObj = new StreamWriter(strFilePath, false, System.Text.Encoding.UTF8);
                strmWriterObj.WriteLine(tableheader);
                strmWriterObj.WriteLine(columname);
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    strBufferLine = "";
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        if (j > 0)
                            strBufferLine += ",";
                        strBufferLine += dt.Rows[i][j].ToString();
                    }
                    strmWriterObj.WriteLine(strBufferLine);
                }
                strmWriterObj.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 将Csv读入DataTable
        /// </summary>
        /// <param name="filePath">csv文件路径</param>
        /// <param name="n">表示第n行是字段title,第n+1行是记录开始</param>
        public static DataTable csv2dt(string filePath, int n, DataTable dt)
        {
            StreamReader reader = new StreamReader(filePath, System.Text.Encoding.UTF8, false);
            int i = 0, m = 0;
            reader.Peek();
            while (reader.Peek() > 0)
            {
                m = m + 1;
                string str = reader.ReadLine();
                if (m >= n + 1)
                {
                    string[] split = str.Split(',');

                    System.Data.DataRow dr = dt.NewRow();
                    for (i = 0; i < split.Length; i++)
                    {
                        dr[i] = split[i];
                    }
                    dt.Rows.Add(dr);
                }
            }
            return dt;
        }
        //写入strdata
        public static void WriteStrdata(string fileName,string strdata)
        {
            StreamWriter sw;
            string strtime= DateTime.Now.ToString("yyyyMMdd")+".csv";
            string fileName1 = fileName + "\\" + strtime;
            if (!File.Exists(fileName))
            {
                string dataHeard = string.Empty;
                //这个地方是写入CSV的标题栏 注意最后个没有分隔符
                dataHeard = "SITEID,PROJECTID,MACHINEID,DATE,TIME,LOT NAME,LOGIN MODE,KEYWORD,ERROR CODE,ERROR MESSAGE,MESSAGE";
                sw = File.CreateText(fileName1.ToString());
                sw.WriteLine(dataHeard);
            }
            else
            {
                sw = File.AppendText(fileName);
            }

            sw.WriteLine(strdata);
            sw.Flush();
            sw.Close();
        }
        //写入strdata
        public static void WriteStrdata(string fileName, dataLog strdata)
        {
            StreamWriter sw;
            string strtime = DateTime.Now.ToString("yyyyMMdd") + "_" + strdata.SITEID + "_" + strdata.PROJECTID + "_" + strdata.MACHINEID+ "_"+".csv";
            string fileName1 = fileName + "\\" + strtime;
            if (!File.Exists(fileName1))
            {
                string dataHeard = string.Empty;
                //这个地方是写入CSV的标题栏 注意最后个没有分隔符
                dataHeard = "SITEID,PROJECTID,MACHINEID,DATE,TIME,LOT NAME,LOGIN MODE,KEYWORD,ERROR CODE,ERROR MESSAGE,MESSAGE";
                sw = File.CreateText(fileName1.ToString());
                sw.WriteLine(dataHeard);
            }
            else
            {
                sw = File.AppendText(fileName1);
            }
            strdata.DATE = DateTime.Now.ToString("MM/dd/yyyy");
            strdata.TIME = DateTime.Now.ToString("HH:mm:ss");
            string strcutstr = strdata.SITEID + "," + strdata.PROJECTID + "," + strdata.MACHINEID + "," + strdata.DATE + "," +
                               strdata.TIME + "," + strdata.LOTNAME + "," + strdata.LOGINMODE + "," + strdata.KEYWORD + "," +
                               strdata.ERRORCODE + "," + strdata.ERRORMESSAGE + "," + strdata.MESSAGE;
            sw.WriteLine(strcutstr);
            sw.Flush();
            sw.Close();
        }

    }
}