MVC View ViewModel HttpPost返回值始终为NULL [英] MVC View ViewModel HttpPost return value is always NULL
问题描述
我正在通过HttpPost表单将ViewModel从我的View传递回Controller.但是，返回的值始终为NULL.
I'm passing a ViewModel back from my View to the Controller via a form HttpPost. However, the values returned are always NULL.
ViewModel
public class vmCompanyAddress
{
public StatelyTechAdmin.Models.Company Company { get; set; }
public StatelyTechAdmin.Models.CompanyAddress Address { get; set; }
public SelectList Counties { get; set; }
}
公司类别模型
public class Company
{
[Key]
public virtual long CompanyId { get; set; }
[Required]
[Display(Name = "Company Name")]
public virtual string Name { get; set; }
public virtual DateTime CreatedDate { get; set; }
public virtual IEnumerable<CompanyAddress> CompanyAddresses { get; set; }
}
CompanyAddress类模型
public class CompanyAddress
{
[Key]
public virtual long CompanyAddressId { get; set; }
[Required]
public virtual long CompanyId { get; set; }
[ForeignKey("CompanyId")]
public virtual Company Company { get; set; }
[Required]
public virtual int CopmanyAddressTypeId { get; set; }
[ForeignKey("CopmanyAddressTypeId")]
public virtual CompanyAddressType CompanyAddressType { get; set; }
[Display(Name = "Address 1")]
public virtual string Address1 { get; set; }
[Display(Name = "Address 2")]
public virtual string Address2 {get; set; }
[Display(Name = "Town")]
public virtual string Town { get; set; }
[Display(Name = "City")]
public virtual string City { get; set; }
[Required]
public virtual long CountyId { get; set; }
[ForeignKey("CountyId")]
[Display(Name = "County")]
public virtual County County { get; set; }
[Required]
[Display(Name = "Postal Code")]
public virtual string PostalCode { get; set; }
public virtual DateTime CreatedDate { get; set; }
}
控制器(获取):
// GET: /Company/Create
public ActionResult Create()
{
vmCompanyAddress vm = new vmCompanyAddress();
vm.Counties = new SelectList(db.County, "CountyId", "Name", -1);
//vm.Address = new CompanyAddress();
//vm.Company = new Company();
return View(vm);
}
控制器(帖子):
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(vmCompanyAddress company)
{
if (ModelState.IsValid)
{
db.Companies.Add(company.Company);
//Amend Address Company & Address Type before save to DB
company.Address.CompanyId = company.Company.CompanyId;
company.Address.CopmanyAddressTypeId = 1;
db.CompanyAddress.Add(company.Address);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(company);
}
查看(创建)
@model StatelyTechAdmin.ViewModels.vmCompanyAddress
@{
ViewBag.Title = "Create";
}
<h2>Create</h2>
@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<fieldset>
<legend>Company</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Company.Name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Company.Name)
@Html.ValidationMessageFor(model => model.Company.Name)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Company.CreatedDate)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Company.CreatedDate)
@Html.ValidationMessageFor(model => model.Company.CreatedDate)
</div>
@* Invoice Address *@
<div class="editor-label">
@Html.LabelFor(model => model.Address.Address1)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address.Address1)
@Html.ValidationMessageFor(model => model.Address.Address1)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Address.Address2)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address.Address2)
@Html.ValidationMessageFor(model => model.Address.Address2)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Address.Town)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address.Town)
@Html.ValidationMessageFor(model => model.Address.Town)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Address.City)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address.City)
@Html.ValidationMessageFor(model => model.Address.City)
</div>
@*<div class="editor-label">
@Html.LabelFor(model => model.Address.County)
</div>
<div class="editor-field">
@Html.DropDownListFor(model => model.Address.CountyId, Model.Counties)
</div>*@
<div class="editor-label">
@Html.LabelFor(model => model.Address.PostalCode)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address.PostalCode)
@Html.ValidationMessageFor(model => model.Address.PostalCode)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
任何人都可以提供关于在填充所有字段时为什么我的返回ViewModel值为NULL的任何建议吗?
Can anyone please offer any advice as to why my return ViewModel values are NULL when all fields are populated?
我已经使用网络记录功能在Google Chrome浏览器中签入，并且所有值都以JSON格式发回.
I've checked in Google Chrome browser using the Network Record feature and all values ARE posted back in JSON format.
非常感谢.
------------编辑---------------
这是我从Google Chrome网络监视器中看到的内容的一部分
Here's part of what I can see from the Google Chrome Network Monitor
Company.Name:ABC123 Company.Created日期:2014/05/13 00:00:00 ....
Company.Name:ABC123 Company.CreatedDate:2014/05/13 00:00:00 ....
因此，它肯定会被退回.
So it is definitely being returned.
推荐答案
我能够重现您的问题，并感到困惑，因为我知道默认的MVC Model Binder可以理解复杂的类型.我剥离了大部分代码，只是尝试使用Company对象来执行该操作，但该操作仍然失败.然后，我注意到在vmCompanyAddress中，类的名称也是属性的名称:
I was able to reproduce your issue and was confused because I know that the default MVC Model Binder understands complex types. I stripped away most of the code and just tried to do it with the Company object, which still failed. I then noticed that in vmCompanyAddress that the name of the class was also the name of the property:
public class vmCompanyAddress
{
public StatelyTechAdmin.Models.Company Company { get; set; }
我将属性的名称更改为与类名称不同的名称，它开始起作用:
I changed the name of the property to something different from the class name and it started working:
public class vmCompanyAddress
{
public StatelyTechAdmin.Models.Company TheCompany { get; set; }
这篇关于MVC View ViewModel HttpPost返回值始终为NULL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
