在DropDownList ASP.NET MVC中获取选定的项目

问题描述：

我知道有多个线程如何获取DropDownList的选定值.但是，我找不到从控制器的局部视图中获取此值的正确方法.

I know there are multiple threads on how to get the selected value of a DropDownList. However I can't find the right way to get this value from a partial view in my controller.

这是我的部分观点:

@model List<aptest.Models.answer>

@Html.DropDownList("dropdownlist", new SelectList(Model, "text", "text"))
<button type="submit">next</button>

答

为了获得下拉值，请将选择列表包装在一个表单标签中.使用模型和DropDownListFor助手

In order to get dropdown value, wrap your select list in a form tag. Use models and DropDownListFor helper

@model MyModel

@using (Html.BeginForm("MyController", "MyAction", FormMethod.Post)
{
   @Html.DropDownListFor(m => m.Gender, MyModel.GetGenderValues())
   <input type="submit" value="Send" />
}

控制器和其他类

public class MyController : Controller 
{
    [HttpPost]
    public ActionResult MyAction(MyModel model)
    {
        // Do something

        return View();
    }
}

public class MyModel
{
    public Gender Gender { get; set; }

    public static List<SelectListItem> GetGenderValues()
    {
        return new List<SelectListItem> 
        {
            new SelectListItem { Text = "Male", Value = "Male" };
            new SelectListItem { Text = "Female", Value = "Female" };
        };
    }
}

public enum Gender 
{
    Male, Female
}

如果您使用局部视图，只需在其中传递模型即可:

And if you use partial view, simply pass your model in it:

@Html.Partial("MyPartialView", Model)

在DropDownList ASP.NET MVC中获取选定的项目

控制器和其他类

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