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在我看来，我收到错误，但找不到类别ID。以下是浏览器中的错误图像。 
查看未检测到模型属性
我不明白为什么它无法检测到我的类别ID。这是我的观点。
@model SeniorProjectMVC.Models.ViewModels.ProductSkuViewModel
@{
Layout = "~/Views/Shared/_AdminLayout.cshtml";
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Create</title>
</head>
<body>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="container">
<div class="text-center"> <h4>Create a new product</h4></div>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="row">
@*<div class="large-4 columns">
@Html.LabelFor(model => model.ID, htmlAttributes: new { @class = "control-label col-md-2" })
@Html.EditorFor(model => model.ID, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.ID, "", new { @class = "text-danger" })
</div>*@
<div class="large-6 columns">
@Html.LabelFor(model => model.PageURL, "Page URL", htmlAttributes: new { @class = "label" })
@Html.EditorFor(model => model.PageURL, new { htmlAttributes = new { @class = "" } })
@Html.ValidationMessageFor(model => model.PageURL, "", new { @class = "text-danger" })
</div>
<div class="large-6 columns">
@Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "label" })
@Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "" } })
@Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
</div>
</div>
<div class="row">
<div class="large-4 columns">
@Html.LabelFor(model => model.Code, htmlAttributes: new { @class = "label" })
@Html.EditorFor(model => model.Code, new { htmlAttributes = new { @class = "" } })
@Html.ValidationMessageFor(model => model.Code, "", new { @class = "text-danger" })
</div>
<div class="large-4 columns">
@Html.LabelFor(model => model.Description, htmlAttributes: new { @class = "label" })
@Html.TextAreaFor(model => model.Description, new { htmlAttributes = new { @class = "" } })
@Html.ValidationMessageFor(model => model.Description, "", new { @class = "text-danger" })
</div>
<div class="large-4 columns">
@Html.LabelFor(model => model.CategoryID, "Category", htmlAttributes: new { @class = "label" })
@Html.DropDownListFor(model => model.CategoryID, (SelectList)ViewBag.Categories, htmlAttributes: new { @class = "" })
@Html.ValidationMessageFor(model => model.CategoryID, "", new { @class = "text-danger" })
</div>
</div>
<div class="row">
<div class="large-4 columns">
@Html.LabelFor(model => model.Price, htmlAttributes: new { @class = "label" })
@Html.EditorFor(model => model.Price, new { htmlAttributes = new { @class = "" } })
@Html.ValidationMessageFor(model => model.Price, "", new { @class = "text-danger" })
</div>
<div class="large-4 columns">
@Html.LabelFor(model => model.Featured, htmlAttributes: new { @class = "label" })
@Html.CheckBoxFor(model => model.Featured, htmlAttributes: new { @class = "" })
</div>
<div class="large-4 columns">
@Html.Label("Upload product image:", new { @class = "label" })
<input type="file" id="ProductImageUpload" name="ProductImageUpload" />
</div>
</div>
<div class="text-center"> <h3> Sku information</h3> </div>
<div class="row">
<div class="large-6 columns end">
<label>Sku Name:</label>
@Html.TextBoxFor(model => model.SKUName, htmlAttributes: new {@class="form-field"})
</div>
</div>
<div class="row">
<div class="large-6 columns">
@Html.LabelFor(model => model.SKUDescription, "Sku Description", new { @class = "label" })
@Html.TextAreaFor(model => model.SKUDescription, htmlAttributes: new { @maxlength = 1000 })
</div>
<div class="large-3 columns">
<label>Sku Quantity</label>
@Html.EditorFor(model => model.SKUQuantity)
</div>
<div class="large-3 columns">
@Html.LabelFor(model => model.SKUInStock, "In stock")
@Html.CheckBoxFor(model => model.SKUInStock)
</div>
</div>
<div class="row">
<div class="large-6 columns text-center">
@Html.ActionLink("Back to List", "Index", null, htmlAttributes: new { @class = "button primary" })
</div>
<div class="large-6 columns text-center">
<input type="submit" value="Create" class="button primary" />
</div>
</div>
</div>
}
</body>
</html>
下面是视图模型..
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Web;
namespace SeniorProjectMVC.Models.ViewModels
{
public class ProductSkuViewModel
{
#region Product Properties
[Required]
[MaxLength]
public string PageURL { get; set; }
[Required]
[StringLength(250)]
public string Name { get; set; }
[Required]
public string Code { get; set; }
public string Description { get; set; }
public int CategoryID { get; set; }
[Column(TypeName = "money")]
[DisplayFormat(DataFormatString = "{0:##.##}", ApplyFormatInEditMode = true)]
public decimal Price { get; set; }
[Required]
public bool Featured { get; set; }
#endregion
#region Sku Properties
[Required]
[StringLength(250)]
public string SKUName { get; set; }
[MaxLength]
public string SKUDescription { get; set; }
public int SKUQuantity { get; set; }
public bool SKUInStock { get; set; }
#endregion
//public Product product { get; set; }
//public Sku sku { get; set; }
}
}
[HttpPost]
[ValidateAntiForgeryToken]
[Authorize(Roles = "SuperAdmin, Admin")]
public ActionResult Create(Models.ViewModels.ProductSkuViewModel ProductSku)
{
ModelState.Clear();
//ProductSku.product.Category_ID = (Request["Category_ID"] != null ? Int32.Parse(Request["Category_ID"]) : 0);
var SiteSettings = Models.Helpers.CacheManager.GetSiteSettings(db, "");
#region nousedyet
if (Request.Files.Count > 0)
{
for (int i = 0; i < Request.Files.Count - 1; i++)
{
var File = Request.Files[i];
if (SiteSettings.First(ss => ss.Key == "AllowedProductImageTypes").Value.Split(',').Contains(Path.GetExtension(File.FileName)))
{
if (File.ContentLength > 0 &&
SiteSettings.First(ss => ss.Key.ToLower() == "allowedproductcontenttypes").Value.Split(',').Contains(File.ContentType))
{
var imagePath = SiteSettings.First(ss => ss.Key.ToLower() == "productuploadpath");
if (!System.IO.Directory.Exists(imagePath.Value))
System.IO.Directory.CreateDirectory(Server.MapPath(imagePath.Value));
System.IO.File.Create(Server.MapPath(imagePath.Value + File.FileName));
}
else
ModelState.AddModelError("", "Could not create product, invalid product image");
}
else
{
ModelState.AddModelError("", "Could not create product, invalid file type");
}
//var FileName = Path.GetExtension(File.FileName);
}
}
#endregion
if (ModelState.IsValid)
{
//Populating the product model
Product product = new Product();
product.PageURL = ProductSku.PageURL;
product.Name = ProductSku.Name;
product.Code = ProductSku.Code;
product.CategoryID = ProductSku.CategoryID;
product.Description = ProductSku.Description;
product.DateCreated = DateTime.Now;
product.DateModified = DateTime.Now;
db.Products.Add(product);
db.SaveChanges();
//Populating the sku model
Sku sku = new Sku();
sku.ProductID = product.ID;
sku.Name = ProductSku.SKUName;
sku.Description = ProductSku.SKUDescription;
sku.Quantity = ProductSku.SKUQuantity;
sku.InStock = ProductSku.SKUInStock;
//set to one right now
sku.PropertyID = 1;
db.SKU_Table.Add(sku);
db.SaveChanges();
}
ViewBag.Category_ID = new SelectList(db.Categories, "Category_ID", "CategoryName", ProductSku.Category_ID);
return View(ProductSku);
}
那么，为什么不能我的类ID找到？
仅当您提交表单并返回视图时才会发生这种情况吗？ –
它是'ViewBag.Category_ID'而不是'ViewBag.Categories'。我错了吗？ – Berkay