c/s 自动升级(WebService)_.NET_编程开发_程序员俱乐部

首先声明,本人文笔不好,大家见笑,请高手不要吐槽.

做c/s开发肯定会遇到的就是自动升级功能,而这实现方式是非常多. 本文使用 webservice的方式来提供升级服务

　　

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首先准备服务

为了方便我们专门用一个文件夹来存放需要更新的应用程序

因为觉得通过新版本来更新很麻烦,所以验证文件是否需要更新用md5来判断

WebService:

 public string GetVer()
        {
            DirectoryInfo dir = new DirectoryInfo(Server.MapPath("update"));
            var list = new List<object>();
            var url = string.Format("http://{0}:{1}/update/", HttpContext.Current.Request.Url.Host,
                                    HttpContext.Current.Request.Url.Port);

            DirectoryInfoHelper.SetDirectoryInfo(dir, list, url, "");
            JavaScriptSerializer json = new JavaScriptSerializer();
            return json.Serialize(list);
        }

相关方法:

public static void SetDirectoryInfo(DirectoryInfo dir, List<object> list, string url, string dirName)
        {
            foreach (var file in dir.GetFiles())
            {
                FileStream fs = File.OpenRead(file.FullName);
                list.Add(new { file.Name, Md5 = Security.GetMd5(fs), LocalHost = url, Directory = dirName });
                fs.Close();
            }
            foreach (var dirInfo in dir.GetDirectories())
            {
                SetDirectoryInfo(dirInfo, list, url, string.Format("{0}{1}/", dirName, dirInfo.Name));
            }
        }

说明:1.不想将模型,而服务端只需要提供数据,所以采用匿名对象

       2.GetVer服务返回信息中 包含 文件名,md5值,域名地址,该文件上级目录

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C/S:

先看界面

现在就跟着提示消息走吧.

1.获取服务文件特征

调用webservice获取文件信息

private List<VerMd5Date> GetServerData()
        {
            AutoUpdate.Update update = new AutoUpdate.Update();
            var json = update.GetVer();
            var list = AppCode.JsonHelper.JsonDeserialize<VerMd5Dates>(json);
            return list;
        }

客户端需要反序列化json 所以建了一个对应model

public class VerMd5Date
    {
        public string Name { get; set; }
        public string Md5 { get; set; }
        public string LocalHost { get; set; }
        public string Directory { get; set; }
    }
    class VerMd5Dates : List<VerMd5Date>
    {
    }

反序列化:

 /// <summary>
        /// 反序列化json
        /// </summary>
        /// <typeparam name="T">对象</typeparam>
        /// <param name="jsonString">json字符串</param>
        public  static T JsonDeserialize<T>(string jsonString)
        {
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
            T obj = (T)ser.ReadObject(ms);
            return obj;
        }

 

2.获取本地文件特征

private List<VerMd5Date> GetLocalData(List<string> serverNames)
        {
            DirectoryInfo dir = new DirectoryInfo(Application.StartupPath);
            var list = new List<VerMd5Date>();
            DirectoryInfoHelper.GetDirectoryInfo(dir, list,"",serverNames);
            return list;
        }

相关方法:

public static void GetDirectoryInfo(DirectoryInfo dir, List<VerMd5Date> list, string dirName, List<string> serverNames)
        {
            foreach (var file in dir.GetFiles().Where(m=>serverNames.Contains(dirName+m.Name)))
            {
                using (FileStream fs = File.OpenRead(file.FullName))
                {
                    list.Add(new VerMd5Date
                        {
                            Name = file.Name,
                            Directory = dirName,
                            Md5 = Security.GetMd5(fs)
                        });
                }
            }
            foreach (var dirInfo in dir.GetDirectories())
            {
                GetDirectoryInfo(dirInfo, list, string.Format("{0}{1}/", dirName, dirInfo.Name), serverNames);
            }
        }

说明:serverNames 是服务器文件名集合,主要用来排除本地文件夹中非本程序文件

3.对比文件差异

private List<VerMd5Date> EqualsList(List<VerMd5Date> list, List<VerMd5Date> localList)
        {
            var getList = new List<VerMd5Date>();
            foreach (var ver in list)
            {
                var file = localList.FirstOrDefault(m => m.Name == ver.Name && m.Directory == ver.Directory);
                if (file == null)
                {
                    getList.Add(ver);
                }
                else
                {
                    if (file.Md5 != ver.Md5 && file.Directory == ver.Directory)
                    {
                        getList.Add(ver);
                    }
                }
            }
            return getList;
        }

4.下面就开始下载吧

foreach (var file in _getList)
            {
                SetItem(string.Format("正在下载 {0}{1}", file.Directory, file.Name));
                DownloadFile(file.LocalHost, file.Directory, file.Name, progressBar1);
            }

DownloadFile:

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public void DownloadFile(string localHost, string dirName, string filename, ProgressBar prog)
        {
            try
            {
                WebRequest rq = WebRequest.Create(string.Format("{0}{1}{2}", localHost, dirName, filename));
                WebResponse rp = rq.GetResponse();

                if (prog != null)
                {
                    SetProg((int) rp.ContentLength, 1);
                }
                string path = string.Format("{0}/{1}", Application.StartupPath, dirName);
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                Stream newFile = File.Create(string.Format("{0}{1}", dirName, filename));
                Stream serviceFile = rp.GetResponseStream();
                if (serviceFile == null)
                    return;

                long totalDownloadedByte = 0;
                byte[] by = new byte[102400];
                int osize = serviceFile.Read(by, 0, by.Length);
                while (osize > 0)
                {
                    if (!cbCpu.Checked)
                        Thread.Sleep(1);

                    newFile.Write(by, 0, osize);
                    osize = serviceFile.Read(by, 0, by.Length);
                    if (prog == null)
                        continue;

                    totalDownloadedByte = osize + totalDownloadedByte;
                    SetProg((int) totalDownloadedByte, 2);
                }
                newFile.Close();
                serviceFile.Close();
                SetItem("下载完成");
            }
            catch(Exception e)
            {
                SetItem(string.Format("---程序异常:{0}", e.Message));
            }
        }

View Code

下载方式有很多,这里已经有了文件的下载地址,下载代码大家就尽情发挥.有什么好的方式也告诉我一下,非常感谢

 

运行截图

基本上就完了.请高手不要吐槽啊.