Cannot resolve scoped service dbcontext from root provider [duplicate] - asp.net-core

Question

This question already has answers here:
How to do DI in asp.net core middleware?
(2 answers)
Closed 2 years ago.
I have created an API Logging middleware to log request to DB and to Azure Microsoft insight however for some reason the Dependency Injection for the Database context is not found (gives cannot resolve scoped service from root provider).
API Logging MiddleWare
public class APILoggingMiddleware
{
private readonly TelemetryClient _telemetry;
private readonly ILogger _logger;
private readonly RequestDelegate _next;
private APIsAuditContext db;
public static IConfiguration _configuration;
public APILoggingMiddleware(RequestDelegate next, ILoggerFactory loggerFactory, TelemetryClient telemetry, IConfiguration configuration, APIsAuditContext dbContext)
{
_configuration = configuration;
_telemetry = telemetry;
_next = next;
_logger = loggerFactory.CreateLogger<APILoggingMiddleware>();
db = dbContext;
}
//static class to simplify adding the middleware to the application’s pipeline
public async Task Invoke(HttpContext context)
{
try
{
await _next(context);
}
finally
{
Task logReq = logRequest(context);
Task lodRes = logResponse(context);
}
}
}
DB Context
public class APIsAuditContext : DbContext
{
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
}
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
}
public APIsAuditContext(DbContextOptions<APIsAuditContext> options) : base(options) { }
public DbSet<APIsRequestsAudit> APIsRequestsAudits { get; set; }
}
Startup
public class Startup
{
public IConfiguration _configuration { get; }
public Startup(IConfiguration configuration)
{
_configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<APIsAuditContext>(options => options.UseSqlServer(_configuration["ConnectionStrings:APIAuditConnection"]));
services.AddApplicationInsightsTelemetry();
services.AddControllers();
services.AddMvc();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
//Pipeline to API Logging
app.UseRequestResponseLogging();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
Can someone help please?

Answer 1

As per https://learn.microsoft.com/en-us/aspnet/core/fundamentals/middleware/write?view=aspnetcore-3.1#per-request-middleware-dependencies, you must inject scoped service in the Invoke method:
public class CustomMiddleware
{
private readonly RequestDelegate _next;
public CustomMiddleware(RequestDelegate next)
{
_next = next;
}
// IMyScopedService is injected into Invoke
public async Task Invoke(HttpContext httpContext, IMyScopedService svc)
{
svc.MyProperty = 1000;
await _next(httpContext);
}
}