Question

我有一点问题，我必须将参数从视图传递给控制器，我已经成功使用输入字段，但使用@html.dropdownList我不知道该怎么做，能帮到我吗，这是我的代码：

观点：

@using (Ajax.BeginForm("GetFilterList", "Inconsistencies",
new AjaxOptions
{
HttpMethod = "POST",
UpdateTargetId = "refreshList",
}, new { @id = "FileList" }
))
{


<span class="input-group-addon">Date de début</span>
<input type="text" class="form-control date-picker" placeholder="jj/mm/aaaa" id="StartDate" name="StartDate" />

<span class="input-group-addon">Date de fin</span>
<input type="text" class="form-control date-picker" placeholder="jj/mm/aaaa" id="EnDate" name="EnDate" />

<span class="input-group-addon">Etat inco</span>
@Html.DropDownListFor(m => m.Inconsistences.InconsistencyStateId, Model.StateList, new { id = "state", }) //how to pass the selected value to controller ?

<span class="input-group-addon">Type inco</span>
<input type="text" class="form-control" id="type" name="type" />


<button type="submit" class="btn btn-sm fsc-btn-1" id="search">
<i class="fa fa-search"></i>
<span>Recherche</span>
</button>


}

控制器：

   [HttpPost]
public ActionResult GetFilterList(DateTime? StartDate, DateTime? EnDate, decimal? State, decimal? type)
{
InconsistenciesModel model = new InconsistenciesModel();

model.FillDDL();
model.GetListFilter(StartDate, EnDate,State, type);
return PartialView("_InconsistenciesList", model);
}

Answer 1

将Ajax.BeginForm简化为

   @using (Ajax.BeginForm("GetFilterList", "Inconsistencies")
    {
        .......    
    }

此搜索按钮的操作会将所有表单值（包括您的下拉列表的选定值）发布到控制器。

希望这有帮助。

Answer 2

它可以帮助您了解任何值如何传递给控制器。

<form>
  <input name="someValue" type="text" value="test" />
  <button type="submit">Submit</submit>
</form>

使用标准 application / x-www-form-urlencoded 方案，将someValue=test的值发送到服务器。

你可以直接使用ASP.net中的标准Request api访问该值。

 public ActionResult Test(){

      string someValue = Request.Form("someValue");
 }

MVC框架通过自动绑定Form和Querystring以及将参数值路由到MVC操作参数来添加一些不错的功能。

 public ActionResult Test(string someValue){

 }

框架还具有绑定到复杂类型的功能（https://msdn.microsoft.com/en-us/magazine/hh781022.aspx）。

在您的情况下，m=> m.Inconsistences.InconsistencyStateId最有可能被翻译成名称“Inconsistences_InconsistencyStateId”

 public ActionResult GetFilterList(string Inconsistences_InconsistencyStateId){

 }

 or 

 // MVC will try to convert the value into an integer
 public ActionResult GetFilterList(int Inconsistences_InconsistencyStateId){

 }

 // MVC will throw an error if the parameter is missing, so you may need to make any ValueType parameters nullable.
 public ActionResult GetFilterList(int? Inconsistences_InconsistencyStateId){

 }

或者你可以自动模型绑定

public class Inconsistences {
 public int InconsistencyStateId {get;set;}
}

public class InconsistenciesModel {
   public Inconsistences Inconsistences {get;set;}
}

public ActionResult GetFilterList(InconsistenciesModel model) {

    int id = model.Inconsistences.InconsistencyStateId;
}

Answer 3

请将您的下拉列表更改为

@Html.DropDownListFor(m => m.Inconsistences.InconsistencyStateId, Model.StateList, new { name = "state", })

OR

如果m=> m.Inconsistences.InconsistencyStateId主要被渲染到名称属性＆＃34; Inconsistences_InconsistencyStateId＆＃34;，则使用如下在控制器中。或者请检查渲染的html中的下拉名称属性并相应地更改操作参数。

public ActionResult GetFilterList(DateTime? StartDate, DateTime? EnDate, decimal? State, int Inconsistences_InconsistencyStateId)
{
     ...
}

这会奏效。因为表单帖子基于表单中的名称值对。

将下拉列表中的选定值从视图传递到控制器

3 个答案: