c# - WPF MVVM 检查更新、通知用户、关闭应用程序、安装更新、重新启动应用程序

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我正在寻找一种检查更新的方法，例如每 5 分钟一次，如果更新可用，请通知用户有关更新、关闭应用程序、安装更新和重新启动应用程序的信息。我到处寻找，但找不到任何正确的答案。

Answer 1

简单的方法

ClickOnce Deployment 正如已经建议的那样

艰难之路

为此，您将需要:

公开任何 API 的服务器，您可以使用它来获取最新版本(例如，运行 apache2 的简单 linux 和包含版本号和链接的纯文本文件)

下载新二进制文件的代码

安装更新的代码(要么自己做(请记住，您可能需要管理员权限才能完成这些事情)或使用安装程序 exe)

服务器部分显然是你的东西，但文件可能如下所示:

 1.2.456.78:http://MyServer.tl/path/to/binary.ext

现在要获取此文件，请使用 System.Net.Http.HttpClient

using (var client = new HttpClient())
using (var response = await client.GetAsync(@"http://MyServer.tl/path/to/version.info"))
{
    [Code handling the version info file]
}

现在您可以将当前的二进制版本与最新版本进行比较

var extractedVersion = Version.Parse(extractedNewVersionString)
var currentVersion = typeof(AnyTypeInYourExeProject).Assembly.GetExecutingAssembly().GetName().Version
if (extractedVersion > currentVersion)
{
    [Continue with downloading]
}

在您确认您已过期后，只需以您喜欢的任何方式显示客户端(尽量避免消息框，因为这只会惹恼很多用户)

当您想要下载更新时，再次使用 System.Net.Http.HttpClient

//exeurl contains our updated executable url
//downloadTo is where we want the executable to be downloaded to
//prog is a progress reporter allowing you to keep track of current progress
public static async Task<string> DownloadFileAsync(string exeurl, string downloadTo, IProgress<Tuple<long, long>> prog)
{
    return await Task.Run(async () =>
    {
        //Create new client
        using (var client = new HttpClient())
        //Await the Get Response
        //HttpCompletionOption.ResponseHeadersRead allows us to process the headers before we actually
        //Download the file
        using (var response = await client.GetAsync(info.link, HttpCompletionOption.ResponseHeadersRead))
        //Get the content
        using (var responseContent = response.Content)
        {
            //Make sure that the directory exists
            if (!Directory.Exists(Path.GetDirectoryName(downloadTo)))
            {
                //Create if it does not
                Directory.CreateDirectory(Path.GetDirectoryName(downloadTo));
            }
            //A variable to allow us to report current progress
            long curLen = 0;
            //Now create the file
            using (var fStream = File.Create(downloadTo))
            //And start reading the stream async
            using (var hStream = await responseContent.ReadAsStreamAsync())
            {
                //and get into a simple loop
                while (true)
                {
                    //Create a buffer to read the bytes in chunks from the stream
                    //(256 is just some example size, can be of any size you like)
                    byte[] buffer = new byte[256];
                    var readBytes = hStream.Read(buffer, 0, buffer.Length);
                    //if no bytes have been read, we are done
                    if (readBytes == 0)
                        break;
                    //write the buffer to the file
                    fStream.Write(buffer, 0, readBytes);
                    //append the ammount of read bytes to our current progress variable
                    curLen += readBytes;
                    //and report the progress to the callee
                    //responseContent.Headers.ContentLength.Value btw. contains the ContentLength reported by the server
                    prog.Report(new Tuple<long, long>(curLen, responseContent.Headers.ContentLength.Value));
                }
            }
            return downloadTo;
        }
    });
}

之后，您必须简单地启动 setup 可执行文件或在启动时请求管理员权限的控制台(替代使用单独的可执行文件)

希望我能帮上忙