C#实现的自动升级系统，包含服务端和客户端实现，支持版本检测、差分更新和静默安装功能：
一、服务端实现（ASP.NET Core Web API）
1. 版本检测接口
[ApiController]
[Route("api/[controller]")]
public class UpdateController : ControllerBase
{private readonly IUpdateService _updateService;public UpdateController(IUpdateService updateService){_updateService = updateService;}[HttpGet("check")]public IActionResult CheckUpdate(string currentVersion){var updateInfo = _updateService.GetUpdateInfo(currentVersion);return Ok(updateInfo);}[HttpGet("download")]public IActionResult DownloadUpdate(string version){var fileStream = _updateService.GetUpdatePackage(version);return File(fileStream, "application/octet-stream", $"Update_{version}.zip");}
}
2. 更新服务实现
public class UpdateService : IUpdateService
{private readonly IConfiguration _config;private readonly IDatabaseService _dbService;public UpdateService(IConfiguration config, IDatabaseService dbService){_config = config;_dbService = dbService;}public UpdateInfo GetUpdateInfo(string currentVersion){var latestVersion = _dbService.GetLatestVersion();return new UpdateInfo{CurrentVersion = currentVersion,LatestVersion = latestVersion,NeedUpdate = !string.IsNullOrEmpty(latestVersion) && new Version(currentVersion) < new Version(latestVersion),DownloadUrl = $"{_config["UpdateBaseUrl"]}/download?version={latestVersion}"};}public Stream GetUpdatePackage(string version){var packagePath = Path.Combine(_config["UpdatePath"], $"Update_{version}.zip");return File.OpenRead(packagePath);}
}
二、客户端实现（WinForm）
1. 自动更新核心类
public class AutoUpdater
{private readonly string _updateUrl = "http://update.example.com/api/update";private readonly string _localVersionFile = "version.txt";public event EventHandler<UpdateProgressEventArgs> ProgressChanged;public event EventHandler<UpdateCompletedEventArgs> Completed;public async Task CheckForUpdates(){try{var response = await HttpClient.GetAsync($"{_updateUrl}/check?currentVersion={GetCurrentVersion()}");var updateInfo = JsonSerializer.Deserialize<UpdateInfo>(await response.Content.ReadAsStringAsync());if (updateInfo.NeedUpdate){await DownloadUpdate(updateInfo.LatestVersion);await InstallUpdate();}}catch (Exception ex){MessageBox.Show($"更新检查失败: {ex.Message}");}}private async Task DownloadUpdate(string version){using var client = new WebClient();client.DownloadProgressChanged += (s, e) => ProgressChanged?.Invoke(this, new UpdateProgressEventArgs(e.ProgressPercentage));await client.DownloadFileTaskAsync($"{_updateUrl}/download?version={version}",Path.Combine(Application.StartupPath, $"Update_{version}.zip"));}private async Task InstallUpdate(){var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());Directory.CreateDirectory(tempDir);ZipFile.ExtractToDirectory(Path.Combine(Application.StartupPath, $"Update_{GetCurrentVersion()}.zip"),tempDir);// 执行静默安装Process.Start(new ProcessStartInfo{FileName = Path.Combine(tempDir, "setup.exe"),Arguments = "/SILENT",UseShellExecute = false,CreateNoWindow = true}).WaitForExit();File.WriteAllText(_localVersionFile, GetCurrentVersion());Completed?.Invoke(this, new UpdateCompletedEventArgs(true));}private string GetCurrentVersion(){return File.Exists(_localVersionFile) ? File.ReadAllText(_localVersionFile) : "0.0.0.0";}
}public class UpdateInfo
{public string CurrentVersion { get; set; }public string LatestVersion { get; set; }public bool NeedUpdate { get; set; }public string DownloadUrl { get; set; }
}public class UpdateProgressEventArgs : EventArgs
{public int ProgressPercentage { get; }public UpdateProgressEventArgs(int percentage) => ProgressPercentage = percentage;
}public class UpdateCompletedEventArgs : EventArgs
{public bool Success { get; }public UpdateCompletedEventArgs(bool success) => Success = success;
}
三. 关键功能实现
1. 差分更新（使用BSdiff算法）
public class DifferentialUpdater
{public byte[] GeneratePatch(byte[] oldData, byte[] newData){var patch = new Bsdiff();return patch.Generate(oldData, newData);}public byte[] ApplyPatch(byte[] oldData, byte[] patch){var patcher = new Bsdiff();return patcher.Apply(oldData, patch);}
}
2. 文件校验
public class FileValidator
{public bool VerifyChecksum(string filePath, string expectedHash){using var sha256 = SHA256.Create();using var stream = File.OpenRead(filePath);var hash = sha256.ComputeHash(stream);return BitConverter.ToString(hash).Replace("-", "") == expectedHash;}
}
四、部署方案
1. 服务端配置（appsettings.json）
{"UpdateBaseUrl": "https://update.example.com","UpdatePath": "C:\\UpdatePackages","Database": {"ConnectionString": "Server=localhost;Database=UpdateDB;Trusted_Connection=True;"}
}
2. 客户端配置（app.config）
<configuration><appSettings><add key="UpdateCheckInterval" value="86400"/> <!-- 24小时检查一次 --><add key="AutoInstall" value="true"/></appSettings>
</configuration>
五、使用示例
// 初始化更新器
var updater = new AutoUpdater();
updater.ProgressChanged += (s, e) => progressBar1.Value = e.ProgressPercentage;
updater.Completed += (s, e) => MessageBox.Show(e.Success ? "更新成功" : "更新失败");// 启动更新检查
await updater.CheckForUpdates();
参考代码 C#自动升级实例源码 www.youwenfan.com/contentcnp/93099.html
六、工程结构
AutoUpdateSystem/
├── Services/ # 业务逻辑层
│ ├── UpdateService.cs
│ └── DifferentialUpdater.cs
├── Clients/ # 客户端实现
│ └── AutoUpdater.cs
├── Models/ # 数据模型
│ └── UpdateInfo.cs
├── Utils/ # 工具类
│ ├── FileValidator.cs
│ └── FileDownloader.cs
└── Tests/ # 单元测试└── UpdateServiceTests.cs