将SelectList中的所选项目保存到DataBase

时间:2017-05-10 09:31:49

标签: c# database asp.net-core

我正在尝试将SelectList中的选定项目保存到我的数据库中,但由于某种原因,我的ID始终保持为“0”。

这是我正在使用的ViewModel:

public class ProductViewModel
    {
        #region Properties

        [Required]
        [Display(Name = "Naam")]
        public string Name { get; set; }

        [Required]
        [Display(Name = "Type")]
        public string Type { get; set; }

        [Required]
        [Display(Name = "Waarschuwing")]
        public int WarningAmount { get; set; }

        [Required]
        [Display(Name = "Inkoopwaarde")]
        public int Buy { get; set; }

        [Required]
        [Display(Name = "Verkoopwaarde")]
        public int Sell { get; set; }

        public int FactoryId { get; set; }
        public SelectList FactoriesList { get; set; }

        #endregion 
    }

观点:

<div class="form-group">
            <label>Fabriek</label>
            <select asp-for="FactoryId" asp-items="Model.FactoriesList">
                <option>Kies een fabriek</option>
            </select>
        </div>

最后,我的控制器:

public async Task<IActionResult> Create()
        {
            ProductViewModel model = new ProductViewModel();

            var factories = _context.Factories.ToList();
            model.FactoriesList = new SelectList(factories, "FactoryId", "Name");

            return View(model);
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Post(
            [Bind("Name", "Type", "WarningAmount", "Buy", "Sell")] ProductViewModel model)
        {
            try
            {
                var config = new MapperConfiguration(cfg => cfg.CreateMap<ProductViewModel, Product>());
                var mapper = config.CreateMapper();
                Product product = mapper.Map<ProductViewModel, Product>(model);

                product.Factory = _context.Factories.Where(w => w.FactoryId == model.FactoryId).First();

                _context.Products.Add(product);
                await _context.SaveChangesAsync();
            }
}

因此,由于某种原因,model.FactoryId始终保持null。已经尝试了很多次并且已经连续几个小时了。

1 个答案:

答案 0 :(得分:3)

尝试在Bind操作中添加Post,以包含FactoryId中的ProductViewModel

[Bind("Name", "Type", "WarningAmount", "Buy", "Sell", "FactoryId")] 

另外,请确保FactoryId的数据类型与数据的实际输入方式匹配(stringint)(例如,使用string进行下拉列表列表选项而不是int