Question

我是MVC的新手告诉我如何在控制器中检索所选的下拉列表值这是我如何将值添加到下拉列表

List<SelectListItem> items = new List<SelectListItem>();
            items.Add(new SelectListItem { Text = "What is your Place of Birth?", Value = "What is your Place of Birth?" });
            items.Add(new SelectListItem { Text = "What is your favourite Book?", Value = "What is your favourite Book?" });
            items.Add(new SelectListItem { Text = "What is your childhood friend name?", Value = "What is your childhood friend name?" });
            items.Add(new SelectListItem { Text = "What is your first car make and model?", Value = "What is your first car make and model?" });
            items.Add(new SelectListItem { Text = "What is your favourite place?", Value = "What is your favourite place?" });
            ViewData["ddlitems"] = items;

查看文件

@Html.DropDownList("ddlitems")

Answer 1

在您的模型上，拥有值的属性：

class ModelClass
{
    public string DropdownValue{get; set;}
}

然后使用以下Razor语法

@Html.DropdownListFor(m => m.DropdownValue, "ddItems");

这将创建一个名为与Model属性相同的下拉列表，它应该自动回复模型

Answer 2

获取所选选项值的最简单方法是将元素的ID与您发布到ActionResult的元素的ID相匹配。因此，如果您的select元素呈现为;

<select id="SomeID">
    <option value="What is your Place of Birth?">What is your Place of Birth?</option>
</select>

然后将其发布到ActionResult

[HttpPost]
public ActionResult MyActionResult(string SomeID){
    // SomeID = What is your Place of Birth?
    Return View();
}

这可能是您案例中最简单的选项，因为您没有要传递到View的强类型对象。另请注意，这适用于您要发布的任何表单元素。只需将ID与ActionResult上的参数进行匹配。

为了更进一步，您可能最好阅读Model Binding within ASP.Net MVC.

在MVC4中获取dropdownlist的值

2 个答案: