AspNet Core 2.1- Services/Repostory Pattern

Service /Repository Pattern:

What Is Services\Repository Pattern:

    public class StudentClassService : IRepository<STD_CLASS>, IDisposable
    {

        private readonly _DbContext _DbContext;
        public StudentClassService(_DbContext dbContext)
        {
            _DbContext = dbContext;
        }

        public void Add(STD_CLASS entity)
        {
            _DbContext.STDCLASS.Add(entity);
            _DbContext.SaveChanges();
        }

        public async Task<bool> AddAsync(STD_CLASS entity)
        {
            await _DbContext.STDCLASS.AddAsync(entity);
            await _DbContext.SaveChangesAsync();
            return true;
        }

        public async Task<bool> AddRangeAsync(IEnumerable<STD_CLASS> entity)
        {
            await _DbContext.STDCLASS.AddRangeAsync(entity);
            await _DbContext.SaveChangesAsync();
            return true;

        }

        public void Delete(STD_CLASS entity)
        {
            _DbContext.Entry(entity).State = EntityState.Modified;
            _DbContext.SaveChanges();
        }

        public async Task<bool> DeleteAsync(STD_CLASS entity)
        {
            _DbContext.Entry(entity).State = EntityState.Modified;
            await _DbContext.SaveChangesAsync();
            return true;
        }

        public void DeleteByFlag(STD_CLASS entity)
        {
            throw new NotImplementedException();
        }

        public void DeleteById(int id)
        {
            throw new NotImplementedException();
        }

        public Task<bool> DeleteRange(STD_CLASS entity)
        {
            throw new NotImplementedException();
        }

        public void DeleteRange(IEnumerable<STD_CLASS> entity)
        {
            throw new NotImplementedException();
        }

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

        public STD_CLASS Get(int id)
        {
            return _DbContext.STDCLASS.Where(c => c.Id == id && c.IsDeleted == false).FirstOrDefault();
        }
        public STD_CLASS Get(string Name)
        {
            return _DbContext.STDCLASS.Where(c => c.ClassName.ToLower() == Name.ToLower() && c.IsDeleted == false).FirstOrDefault();
        }

        public IEnumerable<STD_CLASS> GetAll()
        {
            return _DbContext.STDCLASS.Where(c => c.IsDeleted==false).ToList();
        }

        public void Update(STD_CLASS entity)
        {
            _DbContext.Entry(entity).State = EntityState.Modified;
            _DbContext.SaveChanges();

        }

        public async Task<bool> UpdateAsync(STD_CLASS entity)
        {
            _DbContext.Entry(entity).State = EntityState.Modified;
            await _DbContext.SaveChangesAsync();
            return true;
        }
    }

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AspNet Core MVC 2.1-Delete Action Method

In Asp.net Core the Delete Action is work as follows:

You Need To Create  Get or Post Method


Get Action:

        public async Task<IActionResult> Delete(int? id)

        {

            if (id== null)

            {

                return NotFound();

            }

            var s = await _dbContext.STUDENTINFO.AsNoTracking()

                .FirstOrDefaultAsync(m=>m.Id ==id);

            if(s == null)

            {

                return NotFound();

            }

            //if(saveChangesError.GetValueOrDefault)

            return View();

        }

Post Method:

[HttpPost]

        [ValidateAntiForgeryToken]

        public async Task<IActionResult> Delete(int? id, IFormCollection collection)

        {

            if (id == null)

            {

                return NotFound();

            }

            var s = await _dbContext.STUDENTINFO.AsNoTracking()

                .FirstOrDefaultAsync(m => m.Id == id);

            if (s == null)

            {

                return NotFound();

            }

            try

            {

                // TODO: Add delete logic here

                //var d= await _dbContext.STUDENTINFO.FindAsync(id);

                s.UpdatedBy = 1;

                s.UpdatedDateTime = DateTime.Now;

                await _studentInfoService.DeleteAsync(s);

                Flag = !Flag;

                return RedirectToAction(nameof(Index));

                

            }

            catch

            {

                return View();

            }

        }

Here you need to create a service pattern or Repository pattern but Its Optional
Remember:Repository Pattern is optional .

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