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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace fileIO { class Program { static void Main(string[] args) { string filename =AppDomain.CurrentDomain.BaseDirectory+ "companyUpdateLog.txt"; if (File.Exists(filename)) { string time=ReadLog(filename); if (time != "") { DateTime dt; if (DateTime.TryParse(time, out dt)) { DateTime dtnow = DateTime.Now; int days = (dtnow - dt).Days; if (days == 7) { //开始更新 Console.WriteLine("正在更新"); WriteLog(filename, dtnow.ToString("yyyy-MM-dd HH:mm:ss")); } else { Console.WriteLine("无需更新"); } } } } else { DateTime dtnow = DateTime.Now; //开始更新 Console.WriteLine("文件不存在时候:正在更新"); WriteLog(filename, dtnow.ToString("yyyy-MM-dd HH:mm:ss")); } Console.ReadLine(); } public static void WriteLog(string path,string text) { using (FileStream file = new FileStream(path, FileMode.OpenOrCreate)) { StreamWriter sw = new StreamWriter(file); sw.Write(text); sw.Close(); } } public static string ReadLog(string path) { string a=""; using (FileStream file = new FileStream(path, FileMode.Open)) { StreamReader sw = new StreamReader(file); a=sw.ReadToEnd(); sw.Close(); } return a; }
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