c# - 将 ViewModel 从 HttpGet 操作传递到 HttpPost 操作

Question

我正在尝试在我的 Action Get 中初始化一个 ViewModel，然后将其传递给 View，使用一些数据，然后获取所有数据以在我的 Action Post 中使用，如下所示:

View 模型:

public class AddResponseModel
    {
        iDeskEntities db = new iDeskEntities();
        public AddResponseModel()
        {
            RespTypeList = new SelectList(db.ResponseType.Where(e=>e.type != "Assignar" && e.type != "Reabrir"), "type", "type");
            newRespList = new SelectList(db.Users, "id", "name");
        }

        [Required]
        [DataType(DataType.Text)]
        public string response { get; set; }

        [HiddenInput]
        public Requests request { get; set; }

        [HiddenInput]
        public string newResp { get; set; }

        [DataType(DataType.Text)]
        public SelectList newRespList { get; set; }

        [HiddenInput]
        public int RespType { get; set; }

        [Required]
        [DataType(DataType.Text)]
        public SelectList RespTypeList { get; set; }
    }

Controller :

[HttpGet]
        public ActionResult AddResponse(int? id)
        {
            AddResponseModel model = new AddResponseModel();
            model.request = db.Requests.Find(id);
            return View("AddResponse", model);
        }

[HttpPost]
        public ActionResult AddResponse(Requests req, AddResponseModel model)
        {
            //Some code, where i wanna access again model.request that i //initiated on the GET action
            return RedirectToAction("Dashboard", "BHome");
        }

查看:

@using (Html.BeginForm("AddResponse", "Requests", FormMethod.Post))
{
    @Html.AntiForgeryToken()
    <div class="form-horizontal">
        <hr />
        @Html.ValidationSummary(true)

        @if (Model.request.state != 0)
        {
            <div class="form-group">
                @Html.LabelFor(model => model.RespType, htmlAttributes: new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.DropDownListFor(model => model.RespType, Model.RespTypeList)
                    @Html.ValidationMessageFor(model => model.RespType)
                </div>
            </div>
        }

        <div class="form-group">
            @Html.LabelFor(model => model.response, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.response)
                @Html.ValidationMessageFor(model => model.response)
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Adicionar Resposta" class="btn btn-default" />
            </div>
        </div>
    </div>
}

有办法吗？因为当我尝试在 Post 方法中使用“model.request”时，他变成了“null”

Answer 1

绑定(bind)只会发生在实际使用的字段上。如果您没有在 View 中使用请求属性，最好将 ID 隐藏在输入中，然后在您的 POST 中再次加载到服务器上。对于状态，只需将 bool 属性添加到您的模型中。