之前写了一篇“使用C#创建windows服务”，https://www.cnblogs.com/huangwei1992/p/9693167.html，然后有博友给我推荐了一个开源框架Topshelf。
写了一点测试代码，发现Topshelf框架确实在创建windows服务上非常好用，于是就对我之前的代码进行了改造。
开发流程：
1.在不使用Topshelf框架的情况下，我们需要创建Windows服务程序，在这里我们只需要创建一个控制台程序就行了
2.添加引用
使用程序安装命令：
Install-Package Topshelf
直接在NuGet包管理器中搜索 Topshelf，点击安装即可：
3.新建核心类CloudImageManager
主要方法有三个：LoadCloudImage、Start、Stop，直接贴代码
/// <summary> /// 功能描述 ：卫星云图下载管理器 /// 创 建 者 ：Administrator /// 创建日期 ：2018/9/25 14:29:03 /// 最后修改者 ：Administrator /// 最后修改日期：2018/9/25 14:29:03 /// </summary> public class CloudImageManager { private string _ImagePath = System.Configuration.ConfigurationManager.AppSettings["Path"]; private Timer _Timer = null; private double Interval = double.Parse(System.Configuration.ConfigurationManager.AppSettings["Minutes"]); public CloudImageManager() { _Timer = new Timer(); _Timer.Interval = Interval * 60 * 1000; _Timer.Elapsed += _Timer_Elapsed; } void _Timer_Elapsed(object sender, ElapsedEventArgs e) { StartLoad(); } /// <summary> /// 开始下载云图 /// </summary> private void StartLoad() { LoadCloudImage(); } public void Start() { StartLoad(); _Timer.Start(); } public void Stop() { _Timer.Stop(); } /// <summary> /// 下载当天所有卫星云图 /// </summary> private void LoadCloudImage() { CreateFilePath();//判断文件夹是否存在，不存在则创建 //获取前一天日期 string lastYear = DateTime.Now.AddDays(-1).Year.ToString(); string lastMonth = DateTime.Now.AddDays(-1).Month.ToString(); if (lastMonth.Length < 2) lastMonth = "0" + lastMonth; string lastDay = DateTime.Now.AddDays(-1).Day.ToString(); if (lastDay.Length < 2) lastDay = "0" + lastDay; //获取当天日期 string year = DateTime.Now.Year.ToString(); string month = DateTime.Now.Month.ToString(); if (month.Length < 2) month = "0" + month; string day = DateTime.Now.Day.ToString(); if (day.Length < 2) day = "0" + day; //设置所有文件名 string[] dates0 = { lastYear + "http://www.likecs.com/" + lastMonth + "http://www.likecs.com/" + lastDay, year + "http://www.likecs.com/" + month + "http://www.likecs.com/" + day }; string[] dates = { lastYear + lastMonth + lastDay, year + month + day }; string[] hours = { "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23" }; string[] minutes = { "15", "45" }; int hLength = hours.Count(); //遍历下载当天所有在线云图 for (int i = 0; i < 2; i++) { string date = dates[i]; string date0 = dates0[i]; for (int j = 0; j < hLength; j++) { string hour = hours[j]; for (int k = 0; k < 2; k++) { string minute = minutes[k]; string imageUrl = @"http://image.nmc.cn/product/" + date0 + @"/WXCL/SEVP_NSMC_WXCL_ASC_E99_ACHN_LNO_PY_" + date + hour + minute + "00000.JPG"; string[] s = imageUrl.Split('http://www.likecs.com/'); string imageName = s[s.Count() - 1]; HttpWebRequest request = HttpWebRequest.Create(imageUrl) as HttpWebRequest; HttpWebResponse response = null; try { response = request.GetResponse() as HttpWebResponse; } catch (Exception) { continue; } if (response.StatusCode != HttpStatusCode.OK) continue; Stream reader = response.GetResponseStream(); FileStream writer = new FileStream(_ImagePath + imageName, FileMode.OpenOrCreate, FileAccess.Write); byte[] buff = new byte[512]; int c = 0; //实际读取的字节数 while ((c = reader.Read(buff, 0, buff.Length)) > 0) { writer.Write(buff, 0, c); } writer.Close(); writer.Dispose(); reader.Close(); reader.Dispose(); response.Close(); } } } } /// <summary> /// 判断文件夹是否存在，不存在则创建 /// </summary> private void CreateFilePath() { if (Directory.Exists(_ImagePath)) { ClearImages(); return; } else { Directory.CreateDirectory(_ImagePath); } } /// <summary> /// 清空文件夹下所有文件 /// </summary> private void ClearImages() { try { DirectoryInfo dir = new DirectoryInfo(_ImagePath); FileSystemInfo[] fileinfo = dir.GetFileSystemInfos(); //返回目录中所有文件和子目录 foreach (FileSystemInfo i in fileinfo) { if (i is DirectoryInfo) //判断是否文件夹 { DirectoryInfo subdir = new DirectoryInfo(i.FullName); subdir.Delete(true); //删除子目录和文件 } else { File.Delete(i.FullName); //删除指定文件 } } } catch (Exception e) { Console.WriteLine(e.Message); } } }