如何處理隱藏的價值創造方法

Question

我有proccess這種方法「製造」的形式在asp.net：

public ActionResult Create([Bind(Include = "question_id, feedback_id")] feedback_questions feedback_questions) 

在形式question_id我從選擇框中獲取，但我feedback_id想隱藏，以獲取值。

我的形式：

@using (Html.BeginForm()) { 
    @Html.AntiForgeryToken() 

    <div class="form-horizontal"> 
     <h4>feedback_questions</h4> 
     <hr /> 
     @Html.ValidationSummary(true, "", new { @class = "text-danger" }) 
     <div class="form-group"> 
      @Html.LabelFor(model => model.question_id, "choose question: ", htmlAttributes: new { @class = "control-label col-md-2" }) 
      <div class="col-md-10"> 
       @Html.DropDownList("question_id", null, htmlAttributes: new { @class = "form-control" }) 
       @Html.ValidationMessageFor(model => model.question_id, "", new { @class = "text-danger" }) 
      </div> 
     </div> 
     <div class="form-group"> 
      @Html.LabelFor(model => model.feedback_id, "", htmlAttributes: new { @class = "control-label col-md-2" }) 
      <div class="col-md-10"> 
       // here I want hidden attribute for feedback_id, which will have value @ViewBag.feedback_id 
       @Html.ValidationMessageFor(model => model.question_id, "", new { @class = "text-danger" }) 
      </div> 
     </div> 

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

我該怎麼辦呢？

Answer 1

您可以使用Html.Hidden("feedback_id", @ViewBag.feedback_id)其中feedback_id是隱藏輸入的名稱，應該與您綁定的屬性的名稱相匹配。

Answer 2

也許feedback_id被傳遞到從另一個視圖或佈局視圖，但因爲它是你的模型，爲什麼不把它傳遞到創建視圖的獲取動作

public ActionResult Create() 
{ 
    return View(new feedback_questions() { feedback_id = ?? }); 
} 

[HttpPost] 
public ActionResult Create([Bind(Include = "question_id, feedback_id")] feedback_questions feedback_questions) 
{ 
    return View(feedback_questions);  
} 

那麼你可以只使用HiddenFor幫手

@using (Html.BeginForm()) 
{ 
    @Html.AntiForgeryToken() 
    @Html.HiddenFor(model => model.feedback_id) 
    <div class="form-horizontal"> 
     <h4>feedback_questions</h4> 
     <hr /> 
     @Html.ValidationSummary(true, "", new { @class = "text-danger" }) 
     <div class="form-group"> 
      @Html.LabelFor(model => model.question_id, "choose question: ", htmlAttributes: new { @class = "control-label col-md-2" }) 
      <div class="col-md-10"> 
       @Html.DropDownList("question_id", null, htmlAttributes: new { @class = "form-control" }) 
       @Html.ValidationMessageFor(model => model.question_id, "", new { @class = "text-danger" }) 
      </div> 
     </div> 
     <div class="form-group"> 
      <div class="col-md-offset-2 col-md-10"> 
       <input type="submit" value="Create" class="btn btn-default" /> 
      </div> 
     </div> 
    </div> 
}