[英]Need to pass a List<model> to the Http Post in a Controller
I am passing a List to the view. 我正在将列表传递给视图。 In the view I need to pass back that list.
在视图中,我需要传递回该列表。 It includes an editable check box, which are the items I really need.
它包括一个可编辑的复选框,这是我真正需要的项目。 All of the other fields displayed are for read only purposes.
显示的所有其他字段仅用于只读目的。 If the user wants to designate the item as a clearance, then they check the isClearance checkbox.
如果用户希望将该项目指定为间隙,则可以选中isClearance复选框。 So when they hit the save button it hits the HttpPost Index().
因此,当他们点击保存按钮时,它将点击HttpPost Index()。 However, it passes back a null.
但是,它传回null。 If I change it to be just a modelObject, not List, it works just fine.
如果我将其更改为只是modelObject而不是List,则可以正常工作。
Here is the controller Index: 这是控制器索引:
public ActionResult Index()
{
List<ClearanceViewModel> cc = new List<ClearanceViewModel>();
ClearanceViewModel c = new ClearanceViewModel();
c.sku = "123";
c.title = "Test1";
c.includeOnSite = true;
c.productID = 123;
c.salePrice = Convert.ToDecimal(2.99);
c.RetailPrice = Convert.ToDecimal(4.99);
c.isClearance = false;
cc.Add(c);
c.sku = "123";
c.title = "Test1";
c.includeOnSite = true;
c.productID = 123;
c.salePrice = Convert.ToDecimal(2.99);
c.RetailPrice = Convert.ToDecimal(4.99);
c.isClearance = false;
cc.Add(c);
return View(cc);
}
Here is the View: 这是视图:
@model List<PMS.Models.ClearanceViewModel>
@{
ViewBag.title = "Clearance List";
}
<fieldset>
<legend><span>Clearance List</span></legend>
@using (Html.BeginForm())
{
if (Model.Count() > 0)
{
<table class="list">
<tr>
<th>Sku</th>
<th>Title</th>
<th>Include On Site</th>
<th>Sale price</th>
<th>Retail Price</th>
<th>Quantity</th>
<th>Clearance</th>
</tr>
@foreach(var item in Model)
{
@Html.HiddenFor(modelItem => item.productID);
<tr>
<td>@Html.DisplayFor(modelItem => item.sku)</td>
<td>@Html.DisplayFor(modelItem => item.title)</td>
<td>@Html.DisplayFor(modelItem => item.includeOnSite)</td>
<td>@Html.DisplayFor(modelItem => item.salePrice)</td>
<td>@Html.DisplayFor(modelItem => item.RetailPrice)</td>
<td>@Html.DisplayFor(modelItem => item.quantity)</td>
<td>@Html.EditorFor(modelItem => item.isClearance)</td>
</tr>
}
</table>
<p>
<input type="submit" value="Save" />
</p>
}
}
</fieldset>
Here is the HttpPost in the Controller (clearanceModel is null when it hits the foreach loop, when it should have a list of the items): 这是Controller中的HttpPost(当它到达foreach循环时(应该具有项目列表),clearanceModel为null):
[HttpPost]
public ActionResult Index(List<ClearanceViewModel> clearanceModel)
{
foreach (ClearanceViewModel item in clearanceModel)
{
if (item.isClearance == true)
{
// get the product object, so we can add it to the product Promotion of clearance
var product = _unitOfWork.ProductRepository.Get(filter: p => p.productID == item.productID).FirstOrDefault();
// Make sure that it isn't already in the product promotion for clearance
var productPromotion = _unitOfWork.ProductPromotionRepository.Get(filter: pp => pp.productID == product.productID && pp.promotion.Name == "Clearance").FirstOrDefault();
//add the product promotion
if (productPromotion == null)
{
// get the clearance promotion
var promotion = _unitOfWork.PromotionRepository.Get(filter: pr => pr.Name == "Clearance").FirstOrDefault();
if (promotion != null)
{
ProductPromotion promo = new ProductPromotion();
promo.productID = product.productID;
promo.promotionID = promotion.promotionID;
promo.onDate = DateTime.Now;
promo.offDate = null;
promo.canOverwrite = true;
_unitOfWork.ProductPromotionRepository.Create(promo);
_unitOfWork.SaveChanges();
}
}
}
}
Model binding does not work with foreach loops. 模型绑定不适用于foreach循环。 You have to use a for loop.
您必须使用for循环。 That way the indexer
[i]
is used to create unique name properties for each input element in the generated html. 这样,索引器
[i]
用于为生成的html中的每个输入元素创建唯一的名称属性。
@for (int i = 0; i < Model.Count; i++)
{
@Html.HiddenFor(modelItem => modelItem[i].productID);
<tr>
<td>@Html.DisplayFor(modelItem => modelItem[i].sku)</td>
<td>@Html.DisplayFor(modelItem => modelItem[i].title)</td>
<td>@Html.DisplayFor(modelItem => modelItem[i].includeOnSite)</td>
<td>@Html.DisplayFor(modelItem => modelItem[i].salePrice)</td>
<td>@Html.DisplayFor(modelItem => modelItem[i].RetailPrice)</td>
<td>@Html.DisplayFor(modelItem => modelItem[i].quantity)</td>
<td>@Html.EditorFor(modelItem => modelItem[i].isClearance)</td>
</tr>
}
For a nice explanation of model binding collections, check out this article 有关模型绑定集合的一个很好的解释,请查看本文
您需要一个Modelbinder来绑定列表或一个DisplayTemplate。.现在,列表项的生成名称是:item.sku,item.title等。标准modelbinder无法将其绑定到列表。
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