我在我的MVC项目中使用元组来显示产品，条形码和库存信息与特定产品相关时与特定产品相关的信息。我正在使用数据库第一种方法，而对于元组，我已重新定制模型元组对象的活页夹这是我的观点
@model Tuple<I3SystemEntityModel.tblProduct, I3SystemEntityModel.tblBarcode, I3SystemEntityModel.tblStock>
@{
ViewBag.Title = "Edit";
}
<h2>Edit</h2>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>tblProduct</h4>
<hr />
@Html.ValidationSummary(true)
@Html.HiddenFor(model => model.Item1.ProductRNo)
@Html.HiddenFor(model => model.Item2.BarcodeRno)
@Html.HiddenFor(model => model.Item3.StockRNo)
<div class="form-group">
@Html.LabelFor(model => model.Item1.TillDescription, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.TillDescription)
@Html.ValidationMessageFor(model => model.Item1.TillDescription)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.ProductQty, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.ProductQty)
@Html.ValidationMessageFor(model => model.Item1.ProductQty)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.ProductFullDescription, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.ProductFullDescription)
@Html.ValidationMessageFor(model => model.Item1.ProductFullDescription)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.AgeLimit, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.AgeLimit)
@Html.ValidationMessageFor(model => model.Item1.AgeLimit)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.CostPrice, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.CostPrice)
@Html.ValidationMessageFor(model => model.Item1.CostPrice)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.NewSalesPrice, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.NewSalesPrice)
@Html.ValidationMessageFor(model => model.Item1.NewSalesPrice)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.EffectiveDate, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.EffectiveDate)
@Html.ValidationMessageFor(model => model.Item1.EffectiveDate)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.EndDate, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.EndDate)
@Html.ValidationMessageFor(model => model.Item1.EndDate)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.ProductComment, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.ProductComment)
@Html.ValidationMessageFor(model => model.Item1.ProductComment)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.ProductAtribute, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.ProductAtribute)
@Html.ValidationMessageFor(model => model.Item1.ProductAtribute)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.ProductOrder, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Item1.ProductOrder)
@Html.ValidationMessageFor(model => model.Item1.ProductOrder)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.VatRNo, "VatRNo", new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownList("VatRNo", String.Empty)
@Html.ValidationMessageFor(model => model.Item1.VatRNo)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Item1.DepartmentRNo, "DepartmentRNo", new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownList("DepartmentRNo", String.Empty)
@Html.ValidationMessageFor(model => model.Item1.DepartmentRNo)
</div>
</div>
这是我与编辑有关的控制器操作。
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
tblProduct tblproduct = db.tblProducts.Find(id);
tblBarcode tblBarcode = db.tblBarcodes.Where(d => d.ProductRNo == id).FirstOrDefault();
tblStock tblStock = db.tblStocks.Where(d => d.ProductRNo == id).FirstOrDefault();
Tuple<tblProduct, tblBarcode, tblStock> tupleProduct =
new Tuple<tblProduct, tblBarcode, tblStock>(tblproduct, tblBarcode,tblStock);
if (tblproduct == null)
{
return HttpNotFound();
}
ViewBag.DepartmentRNo = new SelectList(db.tblDepartments, "DepartmentRNo", "DepartmentDiscription", tblproduct.DepartmentRNo);
ViewBag.SubDepatmenRNo = new SelectList(db.tblSubDepartments, "SubDepatmenRNo", "SubDeparmentDiscription", tblproduct.SubDepatmenRNo);
ViewBag.VatRNo = new SelectList(db.tblVats, "VatRNo", "VatCode", tblproduct.VatRNo);
ViewBag.BarcodeTypeRNo = new SelectList(db.tblBarcodeTypes, "BarcodeTypeRNo", "BarcodeType", tblBarcode.BarcodeTypeRNo);
return View(model:tupleProduct);
}
// POST: /Product/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Edit(Tuple<tblProduct, tblBarcode, tblStock> tupleProduct)
{
try
{
if (ModelState.IsValid)
{
db.Entry(tupleProduct.Item1).State = System.Data.Entity.EntityState.Modified;
tupleProduct.Item2.ProductRNo = tupleProduct.Item1.ProductRNo;
db.Entry(tupleProduct.Item2).State = System.Data.Entity.EntityState.Modified;
tupleProduct.Item3.ProductRNo = tupleProduct.Item1.ProductRNo;
db.Entry(tupleProduct.Item3).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.DepartmentRNo = new SelectList(db.tblDepartments, "DepartmentRNo", "DepartmentDiscription", tupleProduct.Item1.DepartmentRNo);
ViewBag.SubDepatmenRNo = new SelectList(db.tblSubDepartments, "SubDepatmenRNo", "SubDeparmentDiscription", tupleProduct.Item1.SubDepatmenRNo);
ViewBag.VatRNo = new SelectList(db.tblVats, "VatRNo", "VatCode", tupleProduct.Item1.VatRNo);
ViewBag.BarcodeTypeRNo = new SelectList(db.tblBarcodeTypes, "BarcodeTypeRNo", "BarcodeType", tupleProduct.Item2.BarcodeTypeRNo);
return View(tupleProduct);
}
catch (DbEntityValidationException dbEx)
{
return View();
}
`
但是，当我编辑产品并发布到控制器外键异常时。下拉列表ID不使用元组对象发布。任何答案，建议不要创建自定义视图模型。
当我调试Departmentrno = 0时屏幕截图（未设置）
我现在无法连接屏幕截图： - （
如果您查看元组的实现，您将看到没有任何无参数构造函数，并且MVC模型绑定与无参数构造函数可用。因此，您不能在MVC模型绑定中使用元组。