jisco_winform_wzjl/CarLocalMeter/PbCls/FileOption.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CarLocalMeter
{
    public class FileOption
    {
        static string dbFile = Path.Combine(AppConfigCache.path, "data/actualDb.data");
        /// <summary>
        /// 计量数据写入本地文件
        /// </summary>
        /// <param name="actualDb"></param>
        /// <param name="msgInfo"></param>
        /// <returns></returns>
        public static bool WriterDb(ActualFirstModel actualDb, out string msgInfo)
        {
            Log lg = Log.GetInstance();
            try
            {
                List<string> ls = new List<string>();
                ls.Add(JsonConvert.SerializeObject(actualDb));
                File.AppendAllLines(dbFile, ls);

                /*
                //判断文件是否存在
                if (!File.Exists(dbFile))
                {
                    //不存在则创建文件并直接写入数据
                    File.WriteAllText(dbFile, JsonConvert.SerializeObject(actualDb) + "\n");
                }
                else
                {
                    List<string> ls = new List<string>();
                    ls.Add(JsonConvert.SerializeObject(actualDb));
                    File.AppendAllLines(dbFile, ls);
                }
                //*/
                msgInfo = "计量完成";
                return true;
            }
            catch (Exception ex)
            {
                lg.WriteLog(LogType.WriteDbLog, "写入信息失败：" + ex.Message);
                msgInfo = "写入数据失败:" + ex.Message;
                return false;
            }
        }

        /// <summary>
        /// 读取本地计量数据
        /// </summary>
        /// <param name="readFlag"></param>
        /// <param name="msgInfo"></param>
        /// <returns></returns>
        public static List<T> ReadDb<T>(ref bool readFlag, ref string msgInfo)
        {
            Log lg = Log.GetInstance();
            List<T> list = new List<T>();

            try
            {
                if (File.Exists(dbFile))
                {
                    string[] strs = File.ReadAllLines(dbFile);
                    foreach (string str in strs) 
                    {
                        T first = JsonConvert.DeserializeObject<T>(str);
                        list.Add(first);
                    }
                    if (list.Count > 0) readFlag = true;
                }
            }
            catch (Exception ex)
            {
                lg.WriteLog(LogType.WriteDbLog, "读取失败：" + ex.Message);
                msgInfo = "读取失败:" + ex.Message;
                readFlag = false;
            }

            return list;
        }

        /// <summary>
        /// 清理文件数据
        /// </summary>
        public static void clearFile() 
        {
            Log lg = Log.GetInstance();
            try 
            {
                if (File.Exists(dbFile))
                {
                    //不存在则创建文件并直接写入数据
                    File.WriteAllText(dbFile, "");
                }
            } catch (Exception ex) 
            {
                lg.WriteLog(LogType.WriteDbLog, "数据进行清理失败：" + ex.Message);
            }
        }
    }
}