从视图中通过下拉菜单中的选定值在MVC3控制器？ [英] passing dropdown's selected value from view to controller in mvc3?

问题描述

我有MVC3 Web应用程序。
在我已经使用EF并从数据库填充两个dropdownlists。

I have mvc3 web application. In that i have used EF and populate two dropdownlists from database.

现在，当我从这些dropdownlists选择值，我需要向他们展示里面的WebGrid
我怎样才能做到这一点？

Now when i select values from those dropdownlists i need to show them inside webgrid how can i do this?

@using (Html.BeginForm()) {
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>Mapping</legend>
        <div class="editor-label">
          @Html.Label("Pricing SecurityID")
        </div>
        <div class="editor-field">
            @Html.DropDownListFor(model => model.ID,
         new SelectList(Model.ID, "Value", "Text"),
            "-- Select category --"
            )
            @Html.ValidationMessageFor(model => model.ID)
        </div>

         <div class="editor-label">
          @Html.Label("CUSIP ID")
        </div>
        <div class="editor-field">
            @Html.DropDownListFor(model => model.ddlId,
         new SelectList(Model.ddlId, "Value", "Text"),
            "-- Select category --"
            )
            @Html.ValidationMessageFor(model => model.ddlId)
        </div>
         <p>
            <input type="submit" value="Mapping" />
        </p>
    </fieldset>
}

当我在映射点击按钮，它会进入所谓的新页 Mapping.cshtml ，并有显示的WebGrid与这两个值。

when i clicked on Mapping button it will goes to new page called Mapping.cshtml and have to show webgrid with those two values.

推荐答案

我想创建一个视图模型

public class YourClassViewModel
{

 public IEnumerable<SelectListItem> Securities{ get; set; }
 public int SelectedSecurityId { get; set; }

 public IEnumerable<SelectListItem> CUSIPs{ get; set; }
 public int SelectedCUSIPId { get; set; }

}

在我付诸行动的方法，我将在视图模型回到我的强类型视图

and in my Get Action method, I will return this ViewModel to my strongly typed View

public ActionResult GetThat()
{
   YourClassViewModel objVM=new YourClassViewModel();
   objVm.Securities=GetAllSecurities() // Get all securities from your data layer 
   objVm.CUSIPs=GetAllCUSIPs() // Get all CUSIPsfrom your data layer    
   return View(objVm);  
}

在我看来，这是强类型，

And In my View Which is strongly typed,

@model YourClassViewModel     
@using (Html.BeginForm())
{
    Security :
     @Html.DropDownListFor(x => x.SelectedSecurityId ,new SelectList(Model.Securities, "Value", "Text"),"Select one") <br/>

    CUSP:
     @Html.DropDownListFor(x => x.SelectedCUSIPId ,new SelectList(Model.CUSIPs, "Value", "Text"),"Select one") <br/>

  <input type="submit" value="Save" />

}

而现在我HttpPost行动的方法，我会接受这个视图模型的参数，我将不得不选择的值有

and now in my HttpPost Action method, I will accept this ViewModel as the parameter and i will have the Selected value there

[HttpPost]
public ActionResult GetThat(YourClassViewModel objVM)
{
   // You can access like objVM.SelectedSecurityId
   //Save or whatever you do please...   
}

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