using CsvHelper;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JY.Utility
{
    public class CSVHelper<T>
    {
        /// <summary>
        /// 读取CSV文件
        /// </summary>
        /// <param name="fileName">csv文件名</param>
        /// <returns></returns>
        public static List<T> ReadCSV(string fileName, string strSeparator = "\t")
        {
            if (!File.Exists(fileName)) return null;
            //Nuget获取CsvHelper
            using (var reader = new StreamReader(fileName))
            {
                var cfg = new CsvHelper.Configuration.CsvConfiguration(CultureInfo.InvariantCulture)
                {
                    Mode = CsvMode.Escape,
                    Escape = '\\',
                    Delimiter = strSeparator//设置分隔符号
                };
                using (var csv = new CsvReader(reader, cfg))
                {
                    var list = csv.GetRecords<T>().ToList();
                    return list;
                }
            }
        }
    }
}