c# 读取CSV文件中的数据

  /// 

        /// //从csv读取数据返回table
        /// 
        /// 
        /// 
        /// 
        static public bool readCSV(string filePath, out DataTable dt)//从csv读取数据返回table
        {
            dt = new DataTable();
            try
            {
                System.Text.Encoding encoding = Encoding.Default;//GetType(filePath); //
                // DataTable dt = new DataTable();
                System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open,
                    System.IO.FileAccess.Read);
                System.IO.StreamReader sr = new System.IO.StreamReader(fs, encoding);
                //记录每次读取的一行记录
                string strLine = "";
                //记录每行记录中的各字段内容
                string[] aryLine = null;
                string[] tableHead = null;
                //标示列数
                int columnCount = 0;
                //标示是否是读取的第一行
                bool IsFirst = true;
                //逐行读取CSV中的数据
                while ((strLine = sr.ReadLine()) != null)
                {
                    if (IsFirst == true)
                    {
                        tableHead = strLine.Split(',');
                        IsFirst = false;
                        columnCount = tableHead.Length;
                        //创建列
                        for (int i = 0; i < columnCount; i++)
                        {
                            DataColumn dc = new DataColumn(tableHead[i]);
                            dt.Columns.Add(dc);
                        }
                    }
                    else
                    {
                        aryLine = strLine.Split(',');
                        DataRow dr = dt.NewRow();
                        for (int j = 0; j < columnCount; j++)

                        {
                            dr[j] = aryLine[j];
                        }
                        dt.Rows.Add(dr);
                    }
                }

                if (aryLine != null && aryLine.Length > 0)

                {
                    dt.DefaultView.Sort = tableHead[0] + " " + "asc";
                }
                sr.Close();
                fs.Close();
                return true;
            }

            catch (Exception)

            {
                return false;
            }
        }



// 调用方法
    string FilePath_3 = Application.StartupPath + "/test.CSV";  // csv文件地址
    DataTable data = new DataTable();
    readCSV(FilePath_3, out data); // 调用函数

// 遍历table 中的所有数据
    for (int i = 0; i < data.Rows.Count; i++)
    {
      for (int j = 0; j < data.Columns.Count; j++)
       {
         object obj = data.Rows[i][j]; //i行j列的值 
         Console.WriteLine("mulRea11= {0}", obj);
       }

    }

注意：csv文件第一行是名称行，必须有，不能被遍历。从第二行开始遍历