Tag: entity framework

Coding

 public virtual int Update(T entity, params Expression<func<t, object="">>[] properties)
        {
            if (entity.Id < 1)
            {
                return Insert(entity).Id;
            }
            if (properties?.Any() == true)
            {
                _dbContext.Attach(entity);
                foreach (var prop in properties)
                {
                    _dbContext.Entry(entity).Property(prop).IsModified = true;
                }
            }
            else
            {
                _dbContext.Entry(entity).State = EntityState.Modified;
            }

            return _dbContext.SaveChanges();
        }

        public virtual int Update(T entity, object replaceBy)
        {
            if (entity.Id < 1)
            {
                return Insert(entity).Id;
            }
            if (replaceBy == null)
            {
                return _dbContext.SaveChanges();
            }

            var properties = replaceBy.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);            
            if (properties?.Any() == true)
            {
                foreach (var prop in properties)
                {
                    var valueOfProp = prop.GetValue(replaceBy, null);
                    var propOfEntity = entity.GetType().GetProperty(prop.Name);
                    propOfEntity.SetValue(entity, Convert.ChangeType(valueOfProp, propOfEntity.PropertyType), null);

                    _dbContext.Entry(entity).Property(propOfEntity.Name).IsModified = true;
                }
            }
            else
            {
                _dbContext.Entry(entity).State = EntityState.Modified;
            }

            return _dbContext.SaveChanges();
        }
</func<t,>

Using

var contact = new Contact { Id = 1, FullName = "Le Thanh Tuan" };

var rs1 = contactService.Update(contact, x => x.FullName);

var rs2 = contactService.Update(contact, new
{
	Id = 1,
	Phone = "0976060432",
	UserName = "tuanitpro",                
	FullName = "Le Thanh Tuan"                             
});