无法将数据从视图发送到控制器 Action .NET MVC
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【中文标题】无法将数据从视图发送到控制器 Action .NET MVC【英文标题】：Unable to Send Data From View To controller Action .NET MVC 【发布时间】：2017-10-23 09:49:23 【问题描述】：只是将一个 int 数据从 View 发送到 Controller Action。但控制器操作未接收到该 int 数据/无法映射该 int 数据。
我的控制器 =>
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult ConfirmNewBatchRequest(int? id)
if ((id?? 0) == 0)
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
Studentassignbatche ConfirmStudentassignbatche = db.Studentassignbatches.Find(id);
Batche FindBatche = db.Batches.Find(ConfirmStudentassignbatche.batch_code);
if (ConfirmStudentassignbatche == null)
return HttpNotFound();
ConfirmStudentassignbatche.StatusCode = 1;
db.Financeofstudents.Add(new Financeofstudent()
UserId = ConfirmStudentassignbatche.UserId,
batch_code = ConfirmStudentassignbatche.batch_code,
debit = FindBatche.amount,
credit = 0,
balance = FindBatche.amount,
lastTrunsaction = DateTime.Now,
entry_date = DateTime.Now
);
TryUpdateModel(ConfirmStudentassignbatche, new string[] "StatusCode" );
db.SaveChanges();
TempData["BatchConfirmSuccess"] = "Success";
return RedirectToAction("Index");
我的看法 =>
@using Something
@model IEnumerable<Studentassignbatche>
@
ViewBag.Title = "Confirm New Batch Request From Student";
IEnumerable<Course> CoursesTable = TempData["Courses"] as IEnumerable<Course>;
IEnumerable<UserDetail> UserDetailTable = TempData["UserDetails"] as IEnumerable<UserDetail>;
@section PageDescription
<section class="content-header">
<h1>
@ViewBag.Title
<small>Tsms-admin</small>
</h1>
</section>
<div class="table-responsive">
<table class="table table-striped table-inverse table-bordered">
<tr>
<th>#</th>
<th>
@html.DisplayNameFor(model => model.UserId)
</th>
<th>
@Html.Label("Student Name")
</th>
<th>
@Html.DisplayNameFor(model => model.batch_code)
</th>
<th>
@Html.DisplayNameFor(model => model.name)
</th>
<th>
@Html.Label("Vendor Name")
</th>
<th>
@Html.DisplayNameFor(model => model.adding_date)
</th>
<th></th>
</tr>
@
int counter = 1;
@foreach (var item in Model)
<tr>
<td>
@counter
</td>
<td>
@Html.DisplayFor(modelItem => item.UserId)
</td>
<td>
@
var UserDetailsId = UserDetailTable.Where(x => x.UserId == item.UserId).Select(x => x.id).FirstOrDefault();
var name = UserDetailTable.Where(x => x.UserId == item.UserId).Select(x => x.fullname).FirstOrDefault();
@Html.ActionLink(name, "Details", "Students", new id = UserDetailsId , null)
</td>
<td>
@Html.ActionLink(item.batch_code, "Details", "Batche", new id = item.batch_code , null)
</td>
<td>
@Html.ActionLink(item.name, "Details", "Course", new id = item.name , null)
</td>
<td>
@
var vendorname = CoursesTable.Where(x => x.name == item.name).Select(x => x.vendor_heading).FirstOrDefault();
<label style="font-weight:normal !important">@vendorname</label>
</td>
<td>
@Html.DisplayFor(modelItem => item.adding_date)
</td>
<td style="width:100px;">
@using (Html.BeginForm())
@Html.AntiForgeryToken()
@Html.HiddenFor(modelitem => item.id)
<div class="form-actions no-color">
<input type="submit" value="Confirm" class="btn btn-success" />
</div>
</td>
</tr>
counter++;
</table>
</div>
循环内的渲染表单如下所示：
<form action="/Admin/ConfirmNewBatchRequest" method="post">
<input name="__RequestVerificationToken" type="hidden" value="K4GmhPUCkcqqclPtxW7F1YpiT_6mQBBZu7Wi8JtfQDMWdmCPMQsbjBfmtr9t8pSBrOV6Yixhhtz0B-OfMtxj4Y8dOwrdRBXlz9v0sD7O8YE1" />
<input data-val="true" data-val-number="The field id must be a number." data-val-required="The id field is required." id="item_id" name="item.id" type="hidden" value="3" />
<div class="form-actions no-color">
<input type="submit" value="Confirm" class="btn btn-success" />
</div>
</form>
这是我的模型如何与视图绑定 =>
public class Studentassignbatche
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int id get; set;
/// <summary>
/// ////////
/// </summary>
[Required(AllowEmptyStrings = false, ErrorMessage = "User Id Is Required!")]
[MaxLength(12, ErrorMessage = "The Max length Of User ID is 12 Character!")]
[RegularExpression("[1-3]2-[0-9]5-[123]1|[1-3]2-[0-9]7-[123]1", ErrorMessage = "Invalid Id,It should [xx]-[xxxxx]-[x] or [xx]-[xxxxxxx]-[x]!")]
[Display(Name = "User ID")]
public string UserId get; set;
/// <summary>
/// /////////
/// </summary>
[Required(AllowEmptyStrings = false, ErrorMessage = "Course Name Is Required!")]
[MaxLength(700, ErrorMessage = "The Max Length For Course Name Is 700 Character!")]
[Display(Name = "Course Name")]
public string name get; set;
/// <summary>
/// /////////
/// </summary>
[Required(AllowEmptyStrings = false, ErrorMessage = "Batch Code Is Required!")]
[MaxLength(700, ErrorMessage = "The Max Length For Batch Code Is 700 Character!")]
[Display(Name = "Batch Code")]
public string batch_code get; set;
/// <summary>
/// ///////
/// </summary>
[Required(AllowEmptyStrings = false, ErrorMessage = "Status Is Required!")]
[RegularExpression("^(?:complete|Complete|in progress|In progress)$", ErrorMessage = "Invalid Status!")]
[Display(Name = "Current Status")]
public string status get; set;
/// <summary>
/// ////////
/// </summary>
[Display(Name = "Course Completion Date")]
[DataType(DataType.DateTime,ErrorMessage="Invalid Date!")]
public Nullable<DateTime> completion_date get; set;
[Display(Name="Date Of Addition")]
[DataType(DataType.DateTime,ErrorMessage="Invalid Date!")]
public DateTime adding_date get; set;
/// <summary>
/// /////////
/// </summary>
[RegularExpression("^[01]1$", ErrorMessage = "Invalid Status Code!")]
[Required(ErrorMessage="Status Code Is Required!")]
public int StatusCode get; set;
//relationship with anothere table------
[ForeignKey("UserId")]
public User User get; set;
/// <summary>
/// //////
/// </summary>
[ForeignKey("name")]
public Course Course get; set;
/// <summary>
/// ///////
/// </summary>
[ForeignKey("batch_code")]
public Batche Batche get; set;
当我在控制器上调试时我发现 => 我尝试使用 =>
public ActionResult ConfirmNewBatchRequest(Studentassignbatche Studentassignbatche)
if (Studentassignbatche == null)
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
但在首次亮相时，它仍然向我显示一个空对象。
为什么会发生这种情况，因为在视图方面它可以生成多个<form></form>。但据我所知，如果视图生成多个<form></form>，仍然每个表单都会获得一个隐藏的输入字段。
当表单提交时，它将与<form> 关联的特定隐藏字段。或者我的 URL 看起来像 http://localhost:43847/Admin/ConfirmNewBatchRequest 的一件事是 URL 有什么问题吗？那么为什么会出现这个问题，以及如何解决这个问题。
【问题讨论】：
呈现的 HTML 是什么样的？您创建的 Hidden 字段是否包含正确的 ID？ @ADyson html 看起来像==><form action="/Admin/ConfirmNewBatchRequest" method="post"> <input name="__RequestVerificationToken" type="hidden" value="K4GmhPUCkcqqclPtxW7F1YpiT_6mQBBZu7Wi8JtfQDMWdmCPMQsbjBfmtr9t8pSBrOV6Yixhhtz0B-OfMtxj4Y8dOwrdRBXlz9v0sD7O8YE1" /><input data-val="true" data-val-number="The field id must be a number." data-val-required="The id field is required." id="item_id" name="item.id" type="hidden" value="3" /> <div class="form-actions no-color"> <input type="submit" value="Confirm" class="btn btn-success" /> </div> </form>
【参考方案1】：
问题是你的表单和你的回发方法不匹配。
在您的表单中，呈现的隐藏字段的name 是item.id。但是，您的操作方法只需要一个名为 id 的 int。该表单将提交它，就好像id 是一个名为item 的对象的一部分。
您用来呈现该字段的 HTML 助手是为您想要回发整个模型而设计的，而不仅仅是一个字段 - 即在这种情况下，您的操作方法必须接受 Studentassignbatche 类型的对象.
要解决此问题，您可以使用更简单的 HiddenField 助手版本：
@Html.Hidden("id", item.id)
这应该呈现如下内容：
<input name="id" type="hidden" value="3" />
这意味着name 与您的操作方法所期望的名称相匹配。
【讨论】：
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