缓存(关联文件)处理

参考:http://msdn.microsoft.com/library/system.runtime.caching.memorycache(v=vs.110).aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-2

引用:System.Runtime.Caching.dll,如下测试,fm4.5

static void CacheTest()
        {
            string cname = "filescontents";
            ObjectCache cc = MemoryCache.Default;
            string fileContents = cc[cname] as string;

            if (fileContents == null)
            {
                CacheItemPolicy policy = new CacheItemPolicy();

                TimeSpan sp = new TimeSpan(0, 1, 0);
                policy.SlidingExpiration = sp;

                List<string> filePaths = new List<string>();
                string path = System.IO.Directory.GetCurrentDirectory() + "\\example.txt";
                filePaths.Add(path);

                policy.ChangeMonitors.Add(new HostFileChangeMonitor(filePaths));

                fileContents = System.IO.File.ReadAllText(path, Encoding.Default);
                cc.Set(cname, fileContents, policy);
            }

            Console.WriteLine(fileContents);
        }

static void Main(string[] args)
        {
            //ExecuteCode(WriteData);
            //ExecuteCode(ReadData);
            //ExecuteCode(TransData);
            bool quit = false;
            while (!quit)
            {
                Console.Write("get cache: ");
                string demo = Console.ReadLine();
                switch (demo)
                {
                    case "Y": ExecuteCode(CacheTest); break;
                    case "Q":
                        quit = true;
                        break;
                    default:
                        Console.WriteLine("Choose a Word of Y and Q(to quit)");
                        break;
                }
            }
            Console.ReadKey();
        }

        public static void ExecuteCode(Action a)
        {
            System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
            stopwatch.Start();

            a();

            stopwatch.Stop();
            TimeSpan timespan = stopwatch.Elapsed;

            Console.WriteLine("运行{0}秒", timespan.TotalSeconds);
        }


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