问题描述
我想针对选定的商店标记多个类别。目前，使用我的功能，每个商店只能分配1个类别。但是，我希望以一种可以为任何商店分配多个类别的方式编写代码。 示例：Amazon Store应该具有多个类别，例如时尚，智能手机，电子产品等等。我目前的代码只分配给了智能手机。
- 商店模型类
public class Store
{
[Key]
public int StoreID { get; set; }
[required]
public string StoreName { get; set; }
public string Storelogo { get; set; }
[AllowHtml]
public string TopDesc { get; set; }
[AllowHtml]
public string MainDesc { get; set; }
public int CatID { get; set; }
public string CatName { get; set; }
public string Slug { get; set; }
public string MetaDesc { get; set; }
[ForeignKey("CatID")]
public virtual Category Category { get; set; }
public IEnumerable<SelectListItem> Categories { get; set; }
}
- 类别模型类
public class Category
{
[Key]
public int CatID { get; set; }
public string CatName { get; set; }
public string Slug { get; set; }
public string CatIcon { get; set; }
}
- AddStore视图
@model C4A.Models.VM.Store
@{
ViewBag.Title = "AddStore";
}
<h2>AddStore</h2>
@using (Html.BeginForm("AddStore","Store",FormMethod.Post,new { enctype = "multipart/form-data" }))
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
@Html.ValidationSummary(true,"",new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.StoreName,htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.StoreName,new { htmlAttributes = new { @class = "form-control col-md-12 col-sm-2" } })
@Html.ValidationMessageFor(model => model.StoreName,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.MetaDesc,htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.MetaDesc,new { htmlAttributes = new { @class = "form-control col-md-12 col-sm-2" } })
@Html.ValidationMessageFor(model => model.MetaDesc,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<label class="control-label col-md-2">Upload Image</label>
<div class="col-md-10">
<input type="file" name="file" id="file" class="btn btn-info" />
@Html.ValidationMessageFor(model => model.Storelogo,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.TopDesc,htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextAreaFor(model => model.TopDesc,new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.TopDesc,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.MainDesc,htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextAreaFor(model => model.MainDesc,new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.MainDesc,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<label class="control-label col-md-2">Category</label>
<div class="col-md-10">
@Html.DropDownListFor(model => model.CatID,Model.Categories,"Select Categories",new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.CatID,new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List","Index")
</div>
@section Scripts {
<script src="~/Scripts/jquery-3.5.1.min.js"></script>
@Scripts.Render("~/bundles/jqueryval")
<script src="~/Scripts/SideBar.js"></script>
<script src="~/Scripts/ckeditor/ckeditor.js"></script>
<script>
CKEDITOR.replace("TopDesc");
CKEDITOR.replace("MainDesc");
</script>
}
- 控制器
[HttpGet]
public ActionResult AddStore()
{
Store model = new Store();
using (Db db = new Db())
{
model.Categories = new SelectList(db.Categories.ToList(),"CatID","CatName");
}
return View(model);
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AddStore(Store model,HttpPostedFileBase file)
{
if (!ModelState.IsValid)
{
using (Db db = new Db())
{
model.Categories = new SelectList(db.Categories.ToList(),"CatName");
return View(model);
}
}
using (Db db = new Db())
{
if (db.Stores.Any(x => x.StoreName == model.StoreName))
{
ModelState.AddModelError("","Store name already taken");
model.Categories = new SelectList(db.Categories.ToList(),"CatName");
return View(model);
}
}
int id;
using (Db db = new Db())
{
Store dto = new Store();
dto.StoreName = model.StoreName;
//dto.Storelogo = model.Storelogo;
dto.TopDesc = model.TopDesc;
dto.MainDesc = model.MainDesc;
dto.CatID = model.CatID;
dto.Slug = model.StoreName.Replace(" ","-").ToLower();
dto.MetaDesc = model.MetaDesc;
Category catDto = db.Categories.FirstOrDefault(x => x.CatID == model.CatID);
dto.CatName = catDto.CatName;
db.Stores.Add(dto);
db.SaveChanges();
id = dto.StoreID;
}
TempData["SM"] = "Store Added Successfully";
#region Upload Image
string StoreImageName = Path.GetFileName(file.FileName) + ".webp";
string physicalPath = Server.MapPath("~/Images/" + StoreImageName);
if (file != null)
{
// Get file extension
string ext = file.ContentType.ToLower();
// Verify extension
if (ext != "image/jpg" &&
ext != "image/jpeg" &&
ext != "image/pjpeg" &&
ext != "image/gif" &&
ext != "image/x-png" &&
ext != "image/webp" &&
ext != "image/png")
{
using (Db db = new Db())
{
model.Categories = new SelectList(db.Categories.ToList(),"CatName");
ModelState.AddModelError("","The image was not uploaded - wrong image extension.");
return View(model);
}
}
// Save image name to DTO
using (Db db = new Db())
{
Store dto = db.Stores.Find(id);
dto.Storelogo = StoreImageName;
db.SaveChanges();
}
file.SaveAs(physicalPath);
}
#endregion
return RedirectToAction("AllStore");
}
有人可以提供代码帮助，以便我可以为特定商店分配多个类别
解决方法
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