AspNetCore MVC页面数据提交验证

using System.ComponentModel.DataAnnotations;

namespace Demo.Models
{
    public class User
    {
        [Key]
        public int Id { get; set; }
        [Display(Name = "登录账号")]
        [Required(ErrorMessage ="登录账号必填")]
        [StringLength(15, ErrorMessage = "字符长度不能超过15个字")]
        public string LoginId { get; set; }
        public string PassWord { get; set; }
        public string Name { get; set; }
        [Range(minimum:1,maximum:100,ErrorMessage ="请输入1到100的数字")]
        public int Age { get; set; }
    }
}

        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="LoginId" class="control-label"></label>
                <input asp-for="LoginId" class="form-control" />
                <span asp-validation-for="LoginId" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="PassWord" class="control-label"></label>
                <input asp-for="PassWord" class="form-control" />
                <span asp-validation-for="PassWord" class="text-danger"></span>
            </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="Age" class="control-label"></label>
                <input asp-for="Age" class="form-control" />
                <span asp-validation-for="Age" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>

    <script src="~/lib/jquery-validation/dist/jquery.validate.js"></script>
    <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js"></script>

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Create([Bind("Id,LoginId,PassWord,Name,Age")] User user)
        {
            if (string.IsNullOrWhiteSpace(user.Name))
            {
                //名称需要填写，此处是为了演示AddModelError方法，实际Name必填应使用Required注释控制
                //ModelState.AddModelError("", "名称需要填写");
                ModelState.AddModelError(nameof(Models.User.Name), "名称需要填写");
                return View(nameof(Create));
            }

            if (ModelState.IsValid)
            {
                _context.Add(user);
                await _context.SaveChangesAsync();
                return RedirectToAction(nameof(Index));
            }
            return View(user);
        }