写在前面
前面写了一篇关于将.NET应用转换成Windows服务的方法，其实真正的目的是为了探索如何将Asp.Net Core Web Api 部署成Windows 服务。基于上一篇的基础，只需把创建 WebApplication 的代码放到 BackgroundService 的ExecuteAsync方法中即可。
其中比较重要的一个细节就是需要指定一下配置：
host.ConfigureAppConfiguration((hostingContext, config) => {
config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
config.AddEnvironmentVariables();
});
appsettings.json 的内容如下：
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"urls": "http://localhost:6001",
"server.urls": "http://localhost:6001"
}
重点部分：
"urls": "http://localhost:6001",
"server.urls": "http://localhost:6001"
代码实现
using System.Runtime.InteropServices;
using System.Text.Json.Serialization;
using Microsoft.Extensions.Hosting;
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args)
{
var host = Host.CreateDefaultBuilder(args);
//判断当前系统是否为windows
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
host.UseWindowsService();
}
host.ConfigureAppConfiguration((hostingContext, config) => {
config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
config.AddEnvironmentVariables();
});
return host.ConfigureServices((hostContext, services) => {
services.AddHostedService();
});
}
}
public class WebApp: BackgroundService
{
public void StartApp()
{
var builder = WebApplication.CreateSlimBuilder([]);
builder.Services.ConfigureHttpJsonOptions(options => {
options.SerializerOptions.TypeInfoResolverChain.Insert(0, AppJsonSerializerContext.Default);
});
var app = builder.Build();
var sampleTodos = new Todo[] {
new(1, "Walk the dog"),
new(2, "Do the dishes", DateOnly.FromDateTime(DateTime.Now)),
new(3, "Do the laundry", DateOnly.FromDateTime(DateTime.Now.AddDays(1))),
new(4, "Clean the bathroom"),
new(5, "Clean the car", DateOnly.FromDateTime(DateTime.Now.AddDays(2)))
};
var todosApi = app.MapGroup("/todos");
todosApi.MapGet("/", () => sampleTodos);
todosApi.MapGet("/{id}", (int id) => sampleTodos.FirstOrDefault(a => a.Id == id) is { } todo
? Results.Ok(todo)
: Results.NotFound());
app.Run();
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
StartApp();
}
}
public record Todo(int Id, string? Title, DateOnly? DueBy = null, bool IsComplete = false);
[JsonSerializable(typeof(Todo[]))]
internal partial class AppJsonSerializerContext : JsonSerializerContext
{
}
项目目录结构：
运行目录结构：
setup.bat 内容：
sc create MyService binPath= %~dp0AspNetCoreWindowsService.exe sc failure MyService actions= restart/60000/restart/60000/""/60000 reset= 86400 sc start MyService sc config MyService start=auto
调用示例
执行setup.bat
服务被成功创建并运行
用浏览器访问一下
访问正常，到此结束。