c# - 在 Configure 方法中使用 DependencyInjection

Question

在 ASP.NET CORE Web 应用程序中，我有一个 MyRepository 类和一个管理对存储库(数据库)的访问的接口(interface) IMyRepository。

每次用户连接到应用程序(在站点上)时，我都需要在数据库中记录一个条目。

在 Startup.cs 中，我在 ConfigureServices 方法中执行

public void ConfigureServices(IServiceCollection services)
{
    // Adds services required for using options.
    services.AddOptions();
    // ...
    services.AddSingleton<IMyRepository, MyRepository>();

然后在Configure方法中我需要更新数据库

public void Configure(IApplicationBuilder app, 
                      IHostingEnvironment env, ILoggerFactory loggerFactory) {
// ...
IMyRepository myRep = ??? // should inject somehow
// ...

app.UseOpenIdConnectAuthentication(new OpenIdConnectOptions
{
    ClientId = Configuration["...ClientId"],
    Authority = Configuration["...AADInstance"] + Configuration["...TenantId"],
    CallbackPath = Configuration["...CallbackPath"],
    Events = new OpenIdConnectEvents
    {
        OnTicketReceived = context =>
        {
            var user = (ClaimsIdentity)context.Ticket.Principal.Identity;
            if (user.IsAuthenticated)
            {
                var firstName = user.FindFirst(ClaimTypes.GivenName).Value;
                var lastName = user.FindFirst(ClaimTypes.Surname).Value;
                var email = user.FindFirst(ClaimTypes.Email).Value;
                var connectedOn = DateTime.UtcNow;
                var userId = user.Name;   

                // 
                // HERE ADD the info in the DB via IMyRepository
                // 
                myRep.AddUserInfo(userId, firstName, lastName, email, connectedOn);
            }

            return Task.FromResult(0);
        }
    }
});

// ...

}

所以我的问题是如何/在何处注入(inject) IMyRepository 以便在 Configure 方法中使用它？

Answer 1

修改您的Configure 方法以获取一个额外的参数IMyRepository myRep，只要您在ConfigureServices 中注册它就会为您注入(inject).

public void Configure(IApplicationBuilder app, 
                      IHostingEnvironment env, 
                      ILoggerFactory loggerFactory, 
                      IMyRepository myRep) { ... }