MVC形式局部視圖重複選擇的值

Question

我有我使用以下方法來輸出的形式來在屏幕MVC應用程序：

@foreach (CarbonFootprintHelper helper in SessionHelper.CarbonFootprint.SelectedItems) 
{ 
    @Html.Partial("_CarbonCalculator_Form", helper) 
} 

局部有以下代碼：

<form action="@UrlUtilities.Urls.CarbonCalculator?SelectedProductId=@SessionHelper.CarbonFootprint.LoadedProduct.ProductID" method="post" class="carbon-form"> 
    @Html.ValidationMessage(string.Format("error-{0}", currentIndex)) 

    @if (SessionHelper.CarbonFootprint.SelectedItems.Count > 1) 
    { 
     <div class="form-row"> 
      <input type="submit" name="remove" value="Remove" class="remove-button button" /> 
     </div> 
    } 

    <div class="form-row"> 
     <label for="product-@currentIndex" class="hide-element">Product</label> 
     @Html.DropDownList("footprintId", ParentList, "Please select a product", new { id = string.Format("product-{0}", currentIndex), @class = "drop-down" }) 
    </div> 

    @if (ChildList != null) 
    { 
     <div class="form-row"> 
      <label for="child-product-@currentIndex" class="hide-element">Sub-Product</label> 
      @Html.DropDownList("childFootprintId", ChildList, "Please select a sub-product", new { id = string.Format("child-product-{0}", currentIndex), @class = "drop-down" }) 
     </div> 
    } 

    <div class="form-row"> 
     <label for="quantity-@selectedParentId" class="hide-element">Quantity</label> 
     @Html.TextBox("quantity", quantity, new { id = string.Format("quantity-{0}", currentIndex), @class = "textbox" }) 
     @Html.Raw(Model.Message) 
    </div> 

    <div class="form-row"> 
     @Html.Hidden("currentIndex", currentIndex, new { id = string.Format("index-{0}", currentIndex) }) 
     <input type="submit" name="calculate" value="Calculate" class="button" /> 
    </div> 
</form> 

基本上只是根據我是否選擇了它們來顯示一些下拉菜單。

我的問題是，如果我有多個表單附加到頁面上，當我按計算按鈕更新該表單時，它將更改所有表單中的所有選定值和數量 - 即使如果我單步執行代碼是分配正確的值。

有誰知道什麼可能導致此？我有一種感覺，這可能是由於輸入都具有相同的名稱。如果讓我怎麼去有一個不同的名稱爲每個輸入，但只保留一個控制器 - eaxmple，目前形成了員額：

public ActionResult CarbonCalculator(string selectedProductId, int currentIndex, int footprintId = 0, int childFootprintId = 0, int quantity = 0) 

但如果我有不同的輸入名字，然後我怎麼避免需要爲每個表單創建一個新控制器？

Answer 1

我設法使這項工作的唯一方法是通過handcoding輸入完全消除HTML輔助，去老同學：

<form action="@UrlUtilities.Urls.CarbonCalculator?SelectedProductId=@SessionHelper.CarbonFootprint.LoadedProduct.ProductID" method="post" class="carbon-form"> 
    @Html.ValidationMessage(string.Format("error-{0}", currentIndex)) 

    @if (SessionHelper.CarbonFootprint.SelectedItems.Count > 1) 
    { 
     <div class="form-row"> 
      <input type="submit" name="remove" value="Remove" class="remove-button button" /> 
     </div> 
    } 

    <div class="form-row"> 
     <label for="product-@currentIndex" class="hide-element">Product</label> 
     <select name="FootprintId" id="product-@currentIndex" class="drop-down"> 
      <option @Html.Raw(Model.FootprintId == 0 ? "selected=\"selected\"" : string.Empty)>Please select a product</option> 
      @foreach (CarbonFootprintProduct prod in CarbonFootprint.Items.FilteredProducts) 
      { 
       <option value="@prod.CarbonFootprintID" @Html.Raw(Model.FootprintId == prod.CarbonFootprintID ? "selected=\"selected\"" : string.Empty)>@prod.ProductDescription</option> 
      } 
     </select> 
    </div> 

    @if (Model.FootprintId > 0 && Model.SelectedProduct.Children.Count > 0) 
    { 
     <div class="form-row"> 
      <label for="child-product-@currentIndex" class="hide-element">Sub-Product</label> 
      <select name="ChildFootprintId" id="child-product-@currentIndex" class="drop-down"> 
       <option @Html.Raw(Model.ChildFootprintId == 0 ? "selected=\"selected\"" : string.Empty)>Please select a sub-product</option> 
       @foreach (CarbonFootprintChild child in Model.SelectedProduct.Children) 
       { 
        <option value="@child.CarbonFootprintChildID" @Html.Raw(Model.ChildFootprintId == child.CarbonFootprintChildID ? "selected=\"selected\"" : string.Empty)>@child.Description</option> 
       } 
      </select> 
     </div> 
    } 

    <div class="form-row"> 
     <div class="infield-holder"> 
      <label for="quantity-@currentIndex" title="Quantity" class="infield">Qty</label> 
      <input type="text" name="Quantity" value="@quantity" class="textbox" id="quantity-@currentIndex" /> 
     </div> 
    </div> 

    @Html.Raw(Model.Message) 

    <div class="form-row"> 
     <input type="hidden" name="CurrentIndex" value="@currentIndex" id="index-@currentIndex" /> 
     <input type="submit" name="calculate" value="Calculate" class="button" /> 
    </div> 
</form> 

Answer 2

啊，看來我得到了它。您應該使用DropDownListFor而不是DropDownList的

@Html.DropDownListFor(Model.FootprintId, ParentList, "Please select a product", new { id = string.Format("product-{0}", currentIndex), @class = "drop-down" }) 

Model.FootprintId應該包含所選產品的ID。

最好的問候， nZ上