.net core api creation isuess &fixes | System.InvalidOperationException: Unable to resolve service for type

Error: response status is 500

Response body

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System.InvalidOperationException: Unable to resolve service for type ‘Crowdrob.BAL.Interfaces.IOrderItemsService’ while attempting to activate ‘Crowdrob.API.Controllers.OrderItemsController’.

at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.ThrowHelperUnableToResolveService(Type type, Type requiredBy)

at lambda_method10(Closure, IServiceProvider, Object[])

at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass6_0.<CreateControllerFactory>g__CreateController|0(ControllerContext controllerContext)

Solutions:

Issues coming because you forgot to add the services into the program.cs file:

builder.Services.AddScoped<IOrderItemsService, OrderItemsService>();

builder.Services.AddScoped<IPaymentService, PaymentService>();

Issues:

Cannot insert explicit value for identity column in table 'tblOrderItems' when IDENTITY_INSERT is set to OFF.
solution: You can check may in primary identity key you are trying to put value, it is auto generated,