注入会不成功。

[gwhzh21]

var builder = new HostBuilder()
.ConfigureServices((hostContext, services) =>
{
services
.UseBeetlexHttp(....)
.AddScoped(db => new SqlConnection(
config.GetConnectionString("Db")))
});
builder.Build().Run();

按此方式注入的IDbConnection，一个客户端一次一次调用是可以的，但是不能并发。多个客户端调用，使用的是同一个IDbConnection对象。这是为什么？
private readonly IDbConnection _dbConnection;
private readonly string _HttpServerUrl;
public MoneyController(IDbConnection dbConnection, IOptions httpServerUrl)
{
this._dbConnection = dbConnection;
this._HttpServerUrl = httpServerUrl.Value.HttpServerUrl;
}
然后在asp.net core 中同样的方式就可以。是我那里写错了吗？下面是asp.net core的方式。
public void ConfigureServices(IServiceCollection services)
{
services.AddScoped(db => new SqlConnection(
Configuration.GetConnectionString("Db")));
}

public MemberController(ILogger logger, IDbConnection dbConnection, IConfiguration configuration)
{
this._logger = logger;
this._dbConnection = dbConnection;
this._configuration = configuration;
this.sign_key = this._configuration["sign_key"];

    }

[beetlex-io]

控制器默认是单实例,需要发这样配置

[Controller(SingleInstance =false)]

[gwhzh21]

谢谢。

[gwhzh21]

[Controller(SingleInstance =false)] 使用了此方法。但是发现，还是注册成了单例，是我写的不对吗？

[gwhzh21]

不是单例，但是会有一个bug。F5启动的时候，会创建controller，
但是每次请求也会创建，请求是创建了，但是有部分请求还是到单例对象里面去了。很奇怪。
我用的jmeter测的，模拟了两个用户同时访问。得到了
一半成功，一半失败。

[beetlex-io]

可以查看 https://github.com/IKende/FastHttpApi/blob/master/src/ActionContext.cs　代码，你这种情况只有注入构建不成功就会拿单例

[beetlex-io]

可以尝试发布版测试，如果调试才有可能是ＤＩ在调试时注入的方式有些问题

[gwhzh21]

发布版的。我也试了，一半成功，一半失败。因为我设置的是每次请求两个。
class Program
{
private static string GetBasePath()
{
using var processModule = Process.GetCurrentProcess().MainModule;
return Path.GetDirectoryName(processModule?.FileName);
}

    static void Main(string[] args)
    {
        var fileroot = GetBasePath();
        var config = new ConfigurationBuilder()
        .SetBasePath(fileroot)
        .AddJsonFile("appsettings.json", true, true)
        .AddCommandLine(args)
        .Build();

        var builder = new HostBuilder()
 .ConfigureServices((hostContext, services) =>
 {
     services
      .UseBeetlexHttp(o =>
      {
          var _CustomerConfig = new CustomerConfig();
          config.GetSection("CustomerConfig").Bind(_CustomerConfig);
          if (!string.IsNullOrWhiteSpace(_CustomerConfig.RedisIp)
          && !string.IsNullOrWhiteSpace(_CustomerConfig.RedisPassWord))
          {
              Redis.Default.DataFormater = new JsonFormater();

              Redis.Default.Host.AddWriteHost(_CustomerConfig.RedisIp, _CustomerConfig.RedisPort)
              .Password = _CustomerConfig.RedisPassWord;
          }
          else if (!string.IsNullOrWhiteSpace(_CustomerConfig.RedisIp)
          && string.IsNullOrWhiteSpace(_CustomerConfig.RedisPassWord))
          {
              Redis.Default.DataFormater = new JsonFormater();

              Redis.Default.Host.AddWriteHost(_CustomerConfig.RedisIp,
                  _CustomerConfig.RedisPort);
          }
      },b=> {
          b.Register(typeof(BeetleX.FastHttpApi.Admin._Admin).Assembly);
      },typeof(Program).Assembly)
      .Configure<CustomerConfig>(options=>
      {
          config.GetSection("CustomerConfig").Bind(options);
          })
      .AddScoped<IDbConnection>(db => new SqlConnection(
                config.GetConnectionString("Db")));
     
 });
        Console.WriteLine($"参数配置成功:");
        builder.Build().Run();
        Console.Read();
    }
}

[gwhzh21]

Controller的代码
[Options(AllowOrigin = "", AllowMethods = "", AllowHeaders = "*")]
[Controller(BaseUrl = "HomeSliderAds", SingleInstance = false)]
public class HomeSliderAdsController
{
private readonly IDbConnection _dbConnection;
public HomeSliderAdsController(IDbConnection dbConnection)
{
this._dbConnection = dbConnection;
}

    /// <summary>
    /// 获取轮播广告图
    /// </summary>
    /// <returns></returns>
    [Post]
    public async Task<ResultBase> GetAdsImages()
    {
       var getallids = (await  _dbConnection.QueryAsync<HomeSliderAdsInfo>
             (@"SELECT [Id]
  ,[DisplayOrder]      
  ,[Image]
  ,[LinkType]
  ,[Remark]

FROM [tb_Mall_HomeSliderAds]
WHERE [BeginTime]<=@datetimenow
AND [EndTime]>=@datetimenow
AND [IsDeleted]=0
ORDER BY [DisplayOrder]", new { DateTimeNow = DateTime.Now })).ToList();
if (getallids.Count == 0)
{
return (new JsonResult(new JsonResponse()
{
Data = null,
Msg = $"没有广告数据",
IsSucceed = false,
Code = StatusCode.NoData.ToString()
}));
}
}
}

[gwhzh21]

我加了一句话在Controller里面然后看了日志
public HomeSliderAdsController(IDbConnection dbConnection)
{
Console.WriteLine("我进来了");

this._dbConnection = dbConnection;
}
日志显示为全部，运行之后，第一句话就是
我进来了
[17:28:04] [Info] register HomeSliderAdsController.GetAdsImages to [POST:/HomeSliderAds/GetAdsImages]

HttpApiServer.Register 这里调用。会导致注册。

[beetlex-io]

你把.AddScoped改成.AddTransient试一下

[beetlex-io]

我建议你直接注入个IGetConnection的单实例，控制器方法里获取用完后释放。ＩＤ的生命周期我也没有完全理解。

[gwhzh21]

好嘛，我直接注入连接字符串好了。