如何在mvc中获取dropdownlist选择的值。 [英] How to get dropdownlist selected value in mvc.

问题描述

我想在mvc中获取所选的dropdownlist值，

在我的视图中我有textbox和dropdwnlist我在控制器中获取textxboxes值但是没有获得下拉列表选择的值。



请帮助我知道我错过了什么。



我有以下代码。



模型

<前lang =c＃> public 类 ValveCertificateModel
{
public 字符串泄漏{获取; set ; }
public int 作业{ get ; set ; }
}

在ViewModel中

  public   class  ValveCertificateViewModel 
 {
  public  ValveCertificateModel ValveCertificateData {获得;  set ; } 
  public  IEnumerable< TableSignalModel> SignalModel { get ;  set ; } 
} 

  public   class  TableSignalModel 
 {
  public   string  SignalName {获取;  set ; } 
} 
 

在控制器中

  public  ActionResult Index（）
 {
  var  valveFields = CertificateRepository.GetValveFields（ ）; 
  return 查看（valveFields）; 
} 
 
 [HttpPost] 
  public  ActionResult显示（ValveCertificateViewModel列表）
 {
  //   TODO  
  return 查看（paraList）; 
} 
 

我尝试过：



查看

 @ using（Html.BeginForm（显示，证书） ，FormMethod.Post））
 {
 @ Html.LabelFor（m => m.ValveCertificateData.Job，new {@class =labelColor}）：
 @ Html.TextBoxFor（ m => m.ValveCertificateData.Job，new {@class =form-control}）
 
 @ Html.DropDownListFor（m => m.ValveCertificateData.Leakage，new List（Model。 SignalModel，，SignalName，Model.ValveCertificateData.Leakage），Select one，new {@class =form-control}）; 
} 

我跑这个的时候我是获取dropdwnlist中的SignalName列表，然后选择提交按钮上的itemand单击，在控制器列表中，我的泄漏属性为null。

但我在控制器中获取文本框值。

解决方案

根据'F-ES-SiteCore'的建议，将新的List（）更改为新的SelectListItem（）。这应该有效。

Hi,
I am trying to get the selected value of dropdownlist in mvc,
In my view I have textbox and dropdwnlist I am getting textxboxes value in controller but not getting dropdownlist selected value.

Please help me to know what I am missing.

I have below code.

In Model

public class ValveCertificateModel
    {
        public string Leakage { get; set; }
        public int Job { get; set; }
    }

In ViewModel

public class ValveCertificateViewModel
    {
        public ValveCertificateModel ValveCertificateData { get; set; }
        public IEnumerable<TableSignalModel> SignalModel { get; set; }
    }

public class TableSignalModel
   {
       public string SignalName { get; set; }
   }

In Controller

public ActionResult Index()
       {
           var valveFields = CertificateRepository.GetValveFields();
           return View(valveFields);
       }

       [HttpPost]
       public ActionResult Display(ValveCertificateViewModel list)
       {
           //TODO
           return View(paraList);
       }

What I have tried:

In View

@using (Html.BeginForm("Display", "Certificate", FormMethod.Post))
{
@Html.LabelFor(m => m.ValveCertificateData.Job, new { @class = "labelColor" }) :
                                                @Html.TextBoxFor(m => m.ValveCertificateData.Job, new { @class = "form-control" })

@Html.DropDownListFor(m => m.ValveCertificateData.Leakage, new List(Model.SignalModel, "", "SignalName", Model.ValveCertificateData.Leakage),"Select one", new { @class = "form-control" });
}

When I run this I am getting list of SignalName in dropdwnlist, and on select the itemand on submit button click, In controller In list I am getting null for leakage property.
but I am getting textbox value in controller.

解决方案

As suggested by 'F-ES-SiteCore', change the new List() to new SelectListItem(). This should work.

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