在.NETCoreMVC6中發布表單時，模型系結強制在非必填欄位中具有值

我正在從 MVC 視圖中發布值。下面是 .cshtml 代碼

 <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Name" class="control-label"></label>
                <input asp-for="Name" class="form-control" />
                <span asp-validation-for="Name" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="ContractStartDate" class="control-label"></label>
                <input asp-for="ContractStartDate" class="form-control" />
                <span asp-validation-for="ContractStartDate" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="ContractEndDate" class="control-label"></label>
                <input asp-for="ContractEndDate" class="form-control" />
                <span asp-validation-for="ContractEndDate" class="text-danger"></span>
            </div>
            <div class="form-group form-check">
                <label class="form-check-label">
                    <input class="form-check-input" asp-for="IsActive" /> @Html.DisplayNameFor(model => model.IsActive)
                </label>
            </div>
            <div class="form-group">
                <label asp-for="Website" class="control-label"></label>
                <input asp-for="Website" class="form-control" />
                <span asp-validation-for="Website" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="LogoUrl" class="control-label"></label>
                <input asp-for="LogoUrl" class="form-control" />
                <span asp-validation-for="LogoUrl" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>

這是我的模型代碼

public class Client : BaseEntity
    {
        [Key]
        public int Id { get; set; }

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

        [Required(ErrorMessage = "Contract StartDate is Required")]
        [DataType(DataType.Date, ErrorMessage = "Invalid Date Format")]
        [Display(Name = "Contract StartDate")]
        public DateTime ContractStartDate { get; set; }

        [Required(ErrorMessage = "Contract EndDate is Required")]
        [DataType(DataType.Date, ErrorMessage = "Invalid Date Format")]
        [Display(Name = "Contract End Date")]
        public DateTime ContractEndDate { get; set; }

        [Required]
        [Display(Name = "Is Active")]
        public bool IsActive { get; set; }

        [Required]
        public string Website { get; set; }

        public string LogoUrl { get; set; }
    }

BaseEntity.cs 代碼

public abstract class BaseEntity
    {
        public string CreatedBy { get; set; }
        public DateTime CreatedDate { get; set; }
        public string CreatedIPAddress { get; set; }

        public string ModifiedBy { get; set; }
        public DateTime ModifiedDate { get; set; }
        public string ModifiedIPAddress { get; set; }
    }

這是 MVC 控制器中的 Post 函式。

[HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Create([Bind("Id,Name,ContractStartDate,ContractEndDate,IsActive,Website,LogoUrl")] Client client)
        {
            if (ModelState.IsValid)
            {
                _context.Add(client);
                await _context.SaveChangesAsync();
                return RedirectToAction(nameof(Index));
            }
            return View(client);
        }

當我在提供所需值后單擊提交按鈕時......即使對于 BaseEntity.cs 類的非必需欄位，它也會顯示驗證錯誤。

當我填寫所有這些非必填欄位并從控制器的 post Bind[] 方法中洗掉時...顯示模型無效。

控制器模型驗證

請參閱詳細錯誤...

請幫助....如何繞過此錯誤。

uj5u.com熱心網友回復：

由于您使用的是 net 6，因此您有 2 個選擇

1. 在 EF 核心專案中洗掉或注釋此行

 <!--<Nullable>enable</Nullable>-->

2. 或者手動使每個類的每個屬性都可以為空

       public string? CreatedBy { get; set; }
        public DateTime? CreatedDate { get; set; }
        public string? CreatedIPAddress { get; set; }
      // ---and so on for all classes

標籤：C＃ asp.net-mvc 实体框架核心 asp.net-core-6.0

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