How to mapped dbcontext to actual dbcontext

Question

1.00/5 (1 vote)

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I am creating generic Repositories and generic Unit of work .when i am trying to save record but unfortunately record is not saved and even no error is occur.

What I have tried:

public interface IRepository<TEntity> where TEntity : class,new()
    {
        Task<IReadOnlyList<TEntity>> ListAllAsync();
        Task AddAsync(TEntity entity);
    }

public class Repository<T> : IRepository<T> where T : class, new()
   {
       protected readonly DbContext _dbContext;
       public Repository(DbContext dbContext)
       {
           this._dbContext = dbContext;
       }

       public async Task AddAsync(T entity)
       {
           await _dbContext.Set<T>().AddAsync(entity);
       }

       public async Task<IReadOnlyList<T>> ListAllAsync()
       {
           return await _dbContext.Set<T>().AsNoTracking().ToListAsync();
       }
   }

public interface IUnitOfWork : IDisposable
    {
        Task CompleteAsync();
    }

public class UnitOfWork : IUnitOfWork
    {
        private readonly DbContext _dbContext;
        public UnitOfWork(DbContext dbContext)
        {
            _dbContext = dbContext;
        }
        public async Task CompleteAsync()
        {
           await _dbContext.SaveChangesAsync();
        }

        public void Dispose()
        {
            _dbContext.Dispose();
        }
    }

public class CustomerService : ICustomerService
    {
        private readonly IRepository<Customer> _customerRepository;
        private readonly IUnitOfWork _unitOfWork;
        public CustomerService(IRepository<Customer> customerRepository, IUnitOfWork unitOfWork)
        {
            this._customerRepository = customerRepository;
            this._unitOfWork = unitOfWork;
        }
        public async Task<IEnumerable<CustomerList>> ListAsync()
        {
            var customer = await _customerRepository.ListAllAsync();
            List<CustomerList> customers = new List<CustomerList>();
            foreach (var item in customer)
            {
                customers.Add(new CustomerList { Id = item.Id, Name = item.Name });
            }
            return customers;
        }

        public async Task<CustomerResource> SaveAsync(CustomerResource category)
        {
            
            try
            {
                await _customerRepository.AddAsync(new Customer { Name = category.Name });
                await _unitOfWork.CompleteAsync();
               return new CustomerResource(true, "Successfully");
            }
            catch (Exception ex)
            {

              return  new CustomerResource($"An error occurred when saving the customer :{ex.Message}" );
            }

        }
    }

services.AddScoped<DbContext, ApplicationDbContext>();

services.AddScoped<IUnitOfWork, UnitOfWork>();
            services.AddScoped(typeof(IRepository<>), typeof(Repository<>));

Posted 25-Feb-19 8:34am

awaisshabir

Updated 26-Feb-19 23:04pm

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Wastedtalent · Answer 1 · 2019-02-26T23:05:00

You don't post your ApplicationDbContext, or how your conenction string is provided, but pottentially ApplicationDbContext should extend DbContext, so:

public class ApplicationDbContext: DbContext
    {
        public ApplicationDbContext(DbContextOptions<CrmContext> options) : base(options)
        {
            
        }

// Remaining code here...
    }

And your Unit of Work should receive your ApplicationDbContext:

public class UnitOfWork : IUnitOfWork
    {
        private readonly ApplicationDbContext_dbContext;
        public UnitOfWork(ApplicationDbContext dbContext)
        {
            _dbContext = dbContext;
        }
        public async Task CompleteAsync()
        {
           await _dbContext.SaveChangesAsync();
        }

        public void Dispose()
        {
            _dbContext.Dispose();
        }
    }

And then you can pass your connection string as part of the dependency injection:

services.AddDbContext<ApplicationDbContext>((options => options.UseSqlServer([connection string details go here]));