如何将当前日期和时间插入到具有 DateTime 类型列的 SQL Server 表中？

Question

我正在我的 ASP.NET Core 项目中工作，并尝试在新用户注册时添加当前注册日期和时间。为此，我使用了以下代码。这是注册ActionResult的一部分：

DateTime currentDate = DateTime.Now;
var user = new AppUser() {
    department = registerModel.department,
        creationDate = registerModel.creationDate = currentDate,
        isAdmin = registerModel.isAdmin,
        isManager = registerModel.isManager,
        isActive = registerModel.isActive,
        canEdit = registerModel.canEdit,
        canDelete = registerModel.canDelete,
        canSendMessage = registerModel.canSendMessage,
        canSeeNotification = registerModel.canSeeNotification
};

当我按下注册按钮时，显示以下错误：

处理请求时发生未处理的异常。 InvalidCastException：System.DateTime 类型的字段必须是 字符串、数组或 ICollection 类型。 System.ComponentModel.DataAnnotations.MaxLengthAttribute.IsValid（对象 值）

如何生成 SQL Server 接受的格式，同时将该对象保留为 DateTime 对象？

更新：

public class AppUser: IdentityUser < int > {
        [Display(Name = "Department")]
        [Required(ErrorMessage = "Please enter depertment")]
        [MaxLength(20)]
        public string department {
            get;
            set;
        }
        [Display(Name = "Creation date")]
        [DataType(DataType.DateTime)]
        [MaxLength(100)]
        public DateTime creationDate {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool isAdmin {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool isManager {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool isActive {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool canEdit {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool canDelete {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool canSendMessage {
            get;
            set;
        }
        [Required]
        //[Range(0, 1)]
        public bool canSeeNotification {
            get;
            set;
        }

Answer 1

试试这个

creationDate  = currentDate,
isAdmin = registerModel.isAdmin,
...