C#讀取csv文件並返回DataTable

        /// <summary>
        /// 將CSV文件的數據讀取到DataTable中
        /// </summary>
        /// <param name="fileName">CSV文件路徑</param>
        /// <returns>返回讀取了CSV數據的DataTable</returns>
        public static DataTable OpenCSV(string filePath)
        {
            try
            {
                FileStream fs = new FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
                Encoding encoding = GetEncoding(filePath); //Encoding.ASCII;//
                DataTable dt = new DataTable();

                StreamReader sr = new StreamReader(fs, encoding);
                //string fileContent = sr.ReadToEnd();
                //encoding = sr.CurrentEncoding;
                //記錄每次讀取的一行記錄
                string strLine = "";
                //記錄每行記錄中的各字段內容
                string[] aryLine = null;
                string[] tableHead = null;
                //標示列數
                int columnCount = 0;
                //標示是否是讀取的第一行
                bool IsFirst = true;
                //逐行讀取CSV中的數據
                while ((strLine = sr.ReadLine()) != null)
                {
                    if (IsFirst == true)
                    {
                        tableHead = strLine.Split(',');
                        IsFirst = false;
                        columnCount = tableHead.Length;//根據文件第一行,確定文件的列數
                        //創建列
                        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 dt;
            }
            catch (Exception ex)
            {
                Log.WriteLog(LogFile.Error, "讀取csv文件出錯\r\n" + ex);
                return null;
            }
            
        }