我正在使用 View 模型 (vm) 来制作新酒。我根据用户的配置文件将 ProducerID 值分配给 get 上的虚拟机。在 View 中呈现时，我可以在 View 中看到 ProducerID 值。用户不能选择或编辑此值，除非他们处于管理员角色(我没有使用该角色进行测试)。我的问题是 ProducerID 总是在 POST 上返回为 0。我不知道我错过了什么，因为我在 View 中选择的其他选项恢复正常。
我试图在虚拟机本身中放置一个新的唯一名称，但它也没有任何值(value)。我环顾四周，发现其他一些人也有类似的问题，但他们的解决方案都没有帮助。在这方面的任何帮助都会很棒。谢谢!
View 模型:
{
public Wine Wine { get; set; }
public VOAVIRequest VOAVIRequest { get; set; }
public bool IsRequest { get; set; }
public SelectList VarTypes { get; set; }
public SelectList Origins { get; set; }
public SelectList Apps { get; set; }
public SelectList Vintages { get; set; }
public SelectList Importers { get; set; }
public NewWineViewModel()
{
this.Wine = new Wine();
}
}
Wine 模型:
public class Wine :Updater
{
public int WineID { get; set; }
//public int WineTypeID { get; set; }
[Display(Name = "Varietal/Type")]
public int VarTypeID { get; set; }
[Display(Name = "Origin")]
public int OriginID { get; set; }
[Display(Name = "Appellation")]
public int AppID { get; set; }
[Display(Name = "Vintage")]
public int VintageID { get; set; }
[Display(Name = "Importer")]
public int? ImporterID { get; set; }
public int ProducerID { get; set; }
public string Designate { get; set; }
[Display(Name = "Drink Window")]
public string DrinkWindow { get; set; }
public string Body { get; set; }
public string SKU { get; set; }
[Display(Name = "Case Production")]
public double CaseProduction { get; set; }
[Display(Name = "Alcohol Content")]
public double AlcoholContent { get; set; }
public string Winemaker { get; set; }
[Display(Name = "Consulting Winemaker")]
public string ConsultWinemaker { get; set; }
public bool Sustainable { get; set; }
public bool Kosher { get; set; }
public bool Organic { get; set; }
public bool Biodynamic { get; set; }
public bool SalmonSafe { get; set; }
public Boolean Active { get; set; }
public virtual WineType WineType { get; set; }
public virtual VarType VarType { get; set; }
public virtual Origin Origin { get; set; }
public virtual App App { get; set; }
public virtual Vintage Vintage { get; set; }
public virtual Importer Importer { get; set; }
public virtual Producer Producer { get; set; }
public virtual ICollection<Review> Reviews { get; set; }
public virtual ICollection<Doc> Docs { get; set; }
public IEnumerable<SelectListItem> BodyList { get; set; }
//for dropdownlist binding
//public IEnumerable<VarType> VarTypes { get; set; }
//public IEnumerable<Origin> Origins { get; set; }
//public IEnumerable<App> Apps { get; set; }
//public IEnumerable<Vintage> Vintages { get; set; }
//public IEnumerable<Importer> Importers { get; set; }
//public IEnumerable<Producer> Producers { get; set; }
public Wine()
{
var BodyList = new List<SelectListItem>()
{
new SelectListItem {Value="", Text="Please select wine body"},
new SelectListItem {Value="", Text="Light-bodied"},
new SelectListItem {Value="", Text="Light to Medium-bodied"},
new SelectListItem {Value="", Text="Medium-bodied"},
new SelectListItem {Value="", Text="Medium to Full-bodied"},
new SelectListItem {Value="", Text="Full-bodied"},
new SelectListItem {Value="", Text="Very Full-bodied"}
};
this.BodyList = BodyList;
}
public virtual String Name {
get {
string sName = string.Empty;
int iVintage;
if (!int.TryParse(this.Vintage.Name.Trim(), out iVintage))
{
sName = iVintage.ToString();
}
if (!string.IsNullOrEmpty(this.Designate))
{
sName = sName + " " + this.Producer.Name + " " + this.Designate + " " + this.VarType.Name;
}
else
{
sName = sName + " " + this.Producer.Name + " " + this.VarType.Name;
}
return sName;
}
}
}
Controller :
public ActionResult Create()
{
NewWineViewModel nw = new NewWineViewModel();
nw.VarTypes = new SelectList(db.VarTypes, "VarTypeID", "Name").Default("Select a Varietal/Type", "0");
nw.Origins = new SelectList(db.Origins, "OriginID", "Name").Default("Select an Origin", "0");
nw.Apps = new SelectList(db.Apps, "AppID", "Name").Default("Select an Appellation", "0");
nw.Vintages = new SelectList(db.Vintages, "VintageID", "Name").Default("Select a Vintage", "0");
nw.Importers = new SelectList(db.Importers, "ImporterID", "Name").Default("Select an Importer", "0");
// keep dynamic
if (User.IsInRole("producer"))
{
Producer currentProd = db.ProducerUsers.Find(Membership.GetUser().ProviderUserKey).Producer;
nw.Wine.ProducerID = currentProd.ProducerID;
ViewBag.ProducerName = currentProd.Name;
ViewBag.ProducerID = currentProd.ProducerID;
}
else
{
ViewBag.ProducerSelect = new SelectList(db.Producers, "ProducerID", "Name");
}
ViewData.Model = nw;
return View();
}
//
// POST: /Wine/Create
[HttpPost]
//[Authorize(Roles = "admin, producereditor")]
public ActionResult Create(NewWineViewModel nw)
{
if (ModelState.IsValid)
{
nw.Wine.Active = nw.IsRequest ? false : true;
nw.Wine.ImporterID = nw.Wine.ImporterID == 0 ? null : nw.Wine.ImporterID;
nw.Wine.CreatedBy = this.User.Identity.Name;
nw.Wine.CreatedOn = DateTime.Now;
db.Wines.Add(nw.Wine);
db.SaveChanges();
if (nw.IsRequest)
{
nw.VOAVIRequest.WineID = nw.Wine.WineID;
db.VOAVIRequests.Add(nw.VOAVIRequest);
RedirectToAction("Requested");
//redirect to "Request Submitted" page for new wines
}
return RedirectToAction("Details", nw.Wine.WineID);
}
ViewBag.VarTypeID = new SelectList(db.VarTypes, "VarTypeID", "Name").Default("Select a Varietal/Type", nw.Wine.VarTypeID.ToString());
ViewBag.OriginID = new SelectList(db.Origins, "OriginID", "Name").Default("Select an Origin", nw.Wine.OriginID.ToString());
ViewBag.AppID = new SelectList(db.Apps, "AppID", "Name").Default("Select an Appellation", nw.Wine.AppID.ToString());
ViewBag.VintageID = new SelectList(db.Vintages, "VintageID", "Name").Default("Select a Vintage", nw.Wine.VintageID.ToString());
ViewBag.ImporterID = new SelectList(db.Importers, "ImporterID", "Name").Default("Select an Importer", nw.Wine.ImporterID.ToString());
if (User.IsInRole("producer"))
{
Producer currentProd = db.ProducerUsers.Find(Membership.GetUser().ProviderUserKey).Producer;
ViewBag.ProducerID = currentProd.ProducerID;
ViewBag.ProducerName = currentProd.Name;
}
else
{
ViewBag.ProducerSelect = new SelectList(db.Producers, "ProducerID", "Name" ,nw.Wine.ProducerID);
}
return View(nw);
}
查看:
@model vf2.ViewModels.NewWineViewModel
@{
ViewBag.Title = "Create a Wine";
}
@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
if (User.IsInRole("admin"))
{
<div class="editor-label">
@Html.LabelFor(m => m.Wine.ProducerID, "Producer")
</div>
<div class="editor-field">
@Html.DropDownListFor(m => m.Wine.ProducerID, ViewBag.ProducerSelect as SelectList, "Select a Varietal/Type")
@*@Html.DropDownList("ProducerSelect", String.Empty)*@
</div>
}
else
{
<h3>@ViewBag.ProducerName</h3>
}
@Html.HiddenFor(m => m.IsRequest)
<table>
<tr>
<td>@Html.LabelFor(m => m.Wine.VarTypeID, "VarType")
</td>
<td>
<div class="voavi-select">
@Html.DropDownListFor(m => m.Wine.VarTypeID, Model.VarTypes, new { @class = "chzn-select" })
</div>
@Html.TextBoxFor(m => m.VOAVIRequest.VarType, new { style = "display: none;", @class = "voavignore" })
<a id="lnkNewVar" class="filetypes" href="#">New Varietal?</a> @* @Html.ValidationMessageFor(m => m.VOAVIRequest.VarType)*@
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.OriginID, "Origin")
</td>
<td>
<div class="voavi-select">
@Html.DropDownListFor(m => m.Wine.OriginID, Model.Origins, new { @class = "chzn-select" })
</div>
<a id="lnkNewOrigin" class="filetypes" href="#">New Origin?</a>
@Html.TextBoxFor(m => m.VOAVIRequest.Origin, new { style = "display: none;", @class = "voavignore" })
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.AppID, "App")
</td>
<td>
<div class="voavi-select">
@Html.DropDownListFor(m => m.Wine.AppID, Model.Apps, new { @class = "chzn-select" })
</div>
<a id="lnkNewApp" class="filetypes" href="#">New Varietal?</a>
@Html.TextBoxFor(m => m.VOAVIRequest.App, new { style = "display: none;", @class = "voavignore" })
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.VintageID, "Vintage")
</td>
<td>
<div class="voavi-select">
@Html.DropDownListFor(m => m.Wine.VintageID, Model.Vintages, new { @class = "chzn-select" })
</div>
<a id="lnkNewVintage" class="filetypes" href="#">New Varietal?</a>
@Html.TextBoxFor(m => m.VOAVIRequest.Vintage, new { style = "display: none;", @class = "voavignore" })
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Designate)
</td>
<td>
@Html.EditorFor(m => m.Wine.Designate)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.DrinkWindow)
</td>
<td>
@Html.EditorFor(m => m.Wine.DrinkWindow)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Body)
</td>
<td>
@Html.DropDownListFor(m => m.Wine.Body, new SelectList(Model.Wine.BodyList, "Value", "Text"), new { @class = "chzn-select" })
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.ImporterID, "Importer")
</td>
<td>
<div class="voavi-select">
@Html.DropDownListFor(m => m.Wine.ImporterID, Model.Importers, new { @class = "chzn-select" })</div>
<a id="lnkNewImporter" class="filetypes" href="#">New Varietal?</a>
@Html.TextBoxFor(m => m.VOAVIRequest.Importer, new { style = "display: none;" })
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.SKU)
</td>
<td>
@Html.EditorFor(m => m.Wine.SKU)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.CaseProduction)
</td>
<td>
@Html.EditorFor(m => m.Wine.CaseProduction)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.AlcoholContent)
</td>
<td>
@Html.EditorFor(m => m.Wine.AlcoholContent)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Winemaker)
</td>
<td>
@Html.EditorFor(m => m.Wine.Winemaker)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.ConsultWinemaker)
</td>
<td>
@Html.EditorFor(m => m.Wine.ConsultWinemaker)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Sustainable)
</td>
<td>
@Html.EditorFor(m => m.Wine.Sustainable)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Kosher)
</td>
<td>
@Html.EditorFor(m => m.Wine.Kosher)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Organic)
</td>
<td>
@Html.EditorFor(m => m.Wine.Organic)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.Biodynamic)
</td>
<td>
@Html.EditorFor(m => m.Wine.Biodynamic)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(m => m.Wine.SalmonSafe)
</td>
<td>
@Html.EditorFor(m => m.Wine.SalmonSafe)
</td>
</tr>
</table>
<p>
<input type="submit" value="Create" />
</p>
}
最佳答案
ProducerID 未被填充，因为它看起来没有随表单一起回发。如果它不是您路线的一部分，您需要将其保存在隐藏字段中:
@Html.HiddenFor(m => m.ProducerID)
关于asp.net-mvc - 模型在 Post 上的 MVC3 中不保留值(value)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10475469/