Question

我在视图中有下拉列表如下：

<td>
                                    @Html.DropDownListFor(model => model.Priority, new SelectList(new List<object>{
                                                                                                     new { value="Select", text= "--Select--" },
                                                                                                    new { value="High", text= "High" },
                                                                                                    new { value ="Normal", text= "Normal" },
                                                                                                    new { value ="Low", text= "Low" }
                                                                                                     }, "value", "text", 0), new { @class = "form-control" })
                                    @Html.ValidationMessageFor(model => model.Priority, "", new { @class = "text-danger" })
                                </td>

我在DB中将'Priority'字段的值设置为'Normal'，'Low'，'High'。我想绑定选定的值以在编辑视图中绑定。我将数据传递给编辑视图，如下所示：

public ActionResult EditTaskDetails(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            List<Task_Detail> Tasks = new List<Task_Detail>();

            Task_Detail TaskDet = new Task_Detail();
            Tasks = new TaskDAO().GetTaskDetailById(id);

            ViewData["TaskDetails"] = Tasks;                      

            return View();
        }

在View中，我绑定其他数据如下：

  @foreach (var task in ViewBag.TaskDetails)
                          {
     <table>
    <tr>
     <td>
@Html.TextBoxFor(model => model.Task_Code, new { id = "txtTCode", Value = @task.Task_Code, @class = "form-control" })
                                        @Html.ValidationMessageFor(model => model.Task_Code, "", new { @class = "text-danger" })
                                    </td>
    </tr>
    </table>

现在，如何将此选定状态值绑定到控制器的下拉列表中？任何人都可以帮我这样做.. 提前谢谢..

Answer 1

使用这些值创建枚举：

public enum ValPriorities
{
High = 1,
Normal = 2,
Low = 3
}

然后创建一个选择列表对象：

var selectList= new SelectList(Enum.GetValues(typeof(ValPriorities)).Cast<ValPriorities>().Select(v => new SelectListItem
         {
             Text = v.ToString(),
             Value = ((int)v).ToString()
         }).ToList(),"Value","Text");

然后在你的控制器中：

ViewData["selectList"] = selectList;

或者您可以将其创建为模型属性并将其发送为：

return View(yourModel);

在你看来：

@Html.DropDownListFor(model => model.ID, ViewData["selectList"],"--Select--", new { @class = "form-control" })

从控制器传递Dropdownlist选择的值以查看MVC5

1 个答案: