Question

我的广告资源跟踪计划有一个名为INV_Assets的主要类。这包括多个子表的[ForeignKey]个字段，包括INV_Locations：

    [Required]
    public int Location_Id { get; set; }
    [ForeignKey("Location_Id")]
    public virtual INV_Locations Location { get; set; }

现在，在Create()/Edit() INV_Assets ViewData[]行动方法中，我填写SelectList元素，其中INV_Locations将在视图上使用（此选择列表合并2将我的ViewData["Location_Id"] = new SelectList((from l in db.INV_Locations.ToList() select new { location_room = l.location_dept + "|" + l.location_room }), "location_room", "location_room");字段放入下拉列表中 - 例如[location_dept] | [location_room] - [IT] | [服务器]）：

ViewData[]

然后在我的视图中，我使用SelectList/DropDownListFor元素填充<span class="control-label col-md-2">Location:</span> <div class="col-md-4"> @Html.DropDownListFor(model => model.Location_Id, (SelectList)ViewData["Location_List"], htmlAttributes: new { @class = "form-control dropdown", @id = "selectLocation" }) @Html.ValidationMessageFor(model => model.Location_Id, "", new { @class = "text-danger" }) </div>：

[IT]|[Server] => [IT]|[Cubicle]

正如我想要的那样正确地填充我的DropDownList，但在我做出选择之后（无论是为Edit（）更改选择[<<< SELECT >>>] => [IT]|[Server]还是为Create（）更改"The field Location_Id must be a number."）一旦焦点移开我获取验证/错误消息Id

具有更多经验的人是否可以权衡我需要修改的内容以保持此验证，但要正确实施？我可能会在DropDown中直观地组合字段[location_dept] | [location_room]，但INV_Location的{{1}}应该是相同的吗？

如果下面有帮助，我的INV_Locations模型：

public class INV_Locations
{
    public override string ToString()
    {
        return this.location_dept + "|" + this.location_room;
    }

    public int Id { get; set; }

    [Display]
    [Required(ErrorMessage = "Please enter a Location Dept.")]
    public string location_dept { get; set; }

    [Required(ErrorMessage = "Please enter a Room.")]
    public string location_room { get; set; }

    [Required]
    [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime created_date { get; set; }

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

    [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime? modified_date { get; set; }

    public string modified_by { get; set; }
}

Answer 1

您的Location_Id字符串

显示您的下拉列表

select new { location_room = l.location_dept + "|" + l.location_room }

你的模型希望它是一个int。

由于验证，无法创建（）/编辑（）记录？

1 个答案: