加载编辑页面时不设置下拉框,但设置视图模型属性的其余部分
本文关键字:设置 属性 模型 视图 余部 编辑页面 加载 | 更新日期: 2023-09-27 17:49:43
我在我的数据库中有这两个表,名为vendor和VendorPriceBreaks:
Vendors
-----------------
VendorID (PK)
Name
VendorPriceBreaks
-----------------
VendorPriceBreakID (PK)
VendorID (FK)
Price
PaymentTypeID (FK)
我有一个单一的视图页面添加Vendor和VendorPriceBreaks在同一时间。
这是我的VendorsViewModel:
public class VendorsViewModel
{
[HiddenInput(DisplayValue = false)]
public int VendorId { get; set; }
public string Name { get; set; }
public IEnumerable<VendorPriceBreaksViewModel> VendorPriceBreaks { get; set; }
}
我的VendorPriceBreaksViewModel:
public class VendorPriceBreaksViewModel
{
[HiddenInput(DisplayValue = false)]
public int VendorPriceBreakId { get; set; }
public double? Price { get; set; }
public int? PaymentTypeId { get; set; }
public IEnumerable<PaymentType> PaymentTypes { get; set; }
}
供应商的视图页:
<%: Html.TextBoxFor(m => m.Name)%>
<table id="dynamic-rows" cellpadding="0" cellspacing="0">
<% foreach (var item in Model.VendorPriceBreaks)
Html.RenderPartial("VendorPriceBreakRow", item);
%>
</table>
这里是我的控件:
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<CopyCraft.WebUI.Areas.Admin.Models.VendorPriceBreaksViewModel>" %>
<tr class="dynamic-row">
<% using(Html.BeginCollectionItem("vendorPriceBreaks")) { %>
<td>$<%= Html.TextBoxFor(m => m.Price) %></td>
<td><%= Html.DropDownListFor(m => m.PaymentTypeId, new SelectList(Model.PaymentTypes, "PaymentTypeID", "Name"), "- Select a Payment Type -")%></td>
<% } %>
</tr>
当我编辑一个供应商和价格分隔被加载时,价格被设置,但在下拉菜单中没有PaymentType值。
下面是编辑Vendor时的函数:
public ActionResult Edit(int id)
{
var vendor = _adminRepository.GetVendor(id);
List<VendorPriceBreaksViewModel> priceBreakssViewModels = new List<VendorPriceBreaksViewModel>();
foreach (VendorPriceBreak priceBreak in vendor.VendorPriceBreaks)
{
priceBreaksViewModels.Add(new VendorPriceBreaksViewModel
{
Price = sheetPrice.Price,
PaperUnitTypeId = sheetPrice.PaperUnitTypeID,
PaperUnitTypes = _adminRepository.GetAllPaperUnitTypes()
}
);
}
var viewModel = new VendorsViewModel
{
VendorId = vendor.VendorID,
Name = vendor.Name,
VendorPriceBreakSheetPrices = sheetPricesViewModels
};
return View(viewModel);
}
所以下拉菜单的数据正在被加载,但是所选的值没有被设置。但是Price值是在文本框中设置的。
我不知道怎么回事
尝试使用以下代码:
<%= Html.DropDownListFor(m => m.PaymentTypeId,
new SelectList(Model.PaymentTypes, "PaymentTypeID", "Name", Model.PaymentTypeId),
"- Select a Payment Type -")%>
更详细的分析在这里- DropDownListFor没有绑定编辑视图与重复的项目(列表)。