asp.net-mvc-4 - 如何在 MVC 4 中发布此模型（空模型）

Question

我的问题很常见，但我自己似乎无法弄清楚为什么当我发布我的模型时它是空的。我的 FormCollection 似乎表明它不了解它发布的整个模型。请参见下面的代码：

我的模型 - CaseForm.cs

namespace Models.CaseForm
{
    public class CaseForm
    {
        public CaseForm()
        {
            this.Person = new Person();
            this.Case = new Case();
            this.Cases = new List<Case>();
        }

        public string strMessage;
        public bool isValidModel;

        public Person Person = new Person();
        public Case Case = new Case();
        public List<Case> Cases = new List<Case>();
    }
}

我的观点 = NewCase.cshtml

@model Models.CaseForm.CaseForm

@using (Html.BeginForm())
{
    @Html.Raw(Model.strMessage)
    <br />

    @*@Html.HiddenFor(m => m.Case.CaseId)
        @Html.HiddenFor(m => m.Case.CaseNotes)
        @Html.HiddenFor(m => m.Case.CaseRef)
        @Html.HiddenFor(m => m.Case.FirstAppointmentMade)
        @Html.HiddenFor(m => m.Case.IsClosedRecord)
        @Html.HiddenFor(m => m.Case.IsFirstContact)
        @Html.HiddenFor(m => m.Case.PersonId)
        @Html.HiddenFor(m => m.Case.ReasanForContact)
        @Html.HiddenFor(m => m.Case.WasAdvisedByEmail)*@

    <legend>
        <fieldset>
            <h4>New Case for @Html.Raw(Model.Person.Firstname + " " + Model.Person.Firstname)</h4>
        </fieldset>
    </legend>

    <table>
        <tr>
            <td>@Html.LabelFor(m => m.Person.PersonRef)</td>
            <td>@Html.DisplayFor(m => m.Person.PersonRef)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Person.LesasPerson.ActionTakenPending, "Action Taken Pending")</td>
            <td>@Html.DisplayFor(m => m.Person.LesasPerson.ActionTakenPending)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Person.LesasPerson.DateArrivedInUk, "Date Arrived In UK")</td>
            <td>@Html.DisplayFor(m => m.Person.LesasPerson.DateArrivedInUk)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(m => m.Person.LesasPerson.ImmigrationStatus, "Immigration Status")</td>
            @{
    string ImmigrationStatus = Model.Person.LesasPerson.ImmigrationStatus == null ? "No status set for this person" : Model.Person.LesasPerson.ImmigrationStatus;
            }

            <td>@Html.Raw(ImmigrationStatus)</td>
        </tr>
    </table>
    <br />

    <div id="divCase" style="border-style: solid; border-width: thin; padding: 5px;">

        <table>
            <tr>
                <td><b>If Case ref is not known then leave blank for now.</b></td>
            </tr>
            <tr>
                <td>
                    @Html.LabelFor(m => m.Case.CaseRef, "Case Reference code")
                </td>
                <td>
                    @Html.TextBoxFor(m => m.Case.CaseRef)
                </td>
            </tr>
            <tr>
                <td>
                    @Html.LabelFor(m => m.Case.FirstAppointmentMade, "First Appointment Made")
                </td>
                <td>
                    @Html.TextBoxFor(m => m.Case.FirstAppointmentMade)
                </td>
            </tr>
            <tr>
                <td>
                    @Html.LabelFor(m => m.Case.IsFirstContact, "Is First Contact")
                </td>
                <td>
                    @Html.CheckBoxFor(m => m.Case.IsFirstContact)
                </td>
            </tr>
            <tr>
                <td>
                    @Html.LabelFor(m => m.Case.ReasanForContact, "Reason For Contact")
                </td>
                <td>
                    @{
    List<SelectListItem> Reasons = new List<SelectListItem>();
    Reasons.Add(new SelectListItem() { Text = "One Off Advice", Value = "One Off Advice", Selected = false });
    Reasons.Add(new SelectListItem() { Text = "Housing", Value = "Housing", Selected = true });
    Reasons.Add(new SelectListItem() { Text = "Immigration", Value = "Immigration", Selected = false });
    Reasons.Add(new SelectListItem() { Text = "Social Advice", Value = "Social Advice", Selected = false });
    Reasons.Add(new SelectListItem() { Text = "Legal", Value = "Legal", Selected = false });

    Reasons = Reasons.OrderBy(r => r.Text).ToList();
                    }
                    @Html.DropDownListFor(m => m.Case.ReasanForContact, Reasons)
                </td>
            </tr>
            <tr>
                <td>
                    @Html.LabelFor(m => m.Case.WasAdvisedByEmail, "Was Advised By Email")
                </td>
                <td>
                    @Html.CheckBoxFor(m => m.Case.WasAdvisedByEmail)
                </td>
            </tr>
        </table>
        <hr />
        <div id="divCaseNote" style="padding:10px;">
            @for (int i = 0; i < Model.Case.CaseNotes.Count; i++)
            {
                int status = i + 1;
                <table>
                    <tr>
                        <td>@Html.Label("This is note: " + status.ToString())</td>
                    </tr>
                    <tr>
                        <td>@Html.LabelFor(m => m.Case.CaseNotes[i].CaseStatus, "Write title or status for note")</td>
                        <td>@Html.TextBoxFor(m => m.Case.CaseNotes[i].CaseStatus)</td>
                        <td>@Html.ValidationMessageFor(m => m.Case.CaseNotes[i].CaseStatus)</td>
                    </tr>
                    <tr>
                        <td>@Html.LabelFor(m => m.Case.CaseNotes[i].CaseNote, "Case Note")</td>
                        <td>@Html.TextAreaFor(m => m.Case.CaseNotes[i].CaseNote)</td>
                        <td>@Html.ValidationMessageFor(m => m.Case.CaseNotes[i].CaseNote)</td>

                        @*@Html.HiddenFor(m => m.Case.CaseNotes[i].CaseDate)
                            @Html.HiddenFor(m => m.Case.CaseNotes[i].CaseId)
                            @Html.HiddenFor(m => m.Case.CaseNotes[i].CaseNote)
                            @Html.HiddenFor(m => m.Case.CaseNotes[i].CaseNoteId)
                            @Html.HiddenFor(m => m.Case.CaseNotes[i].CaseStatus)*@
                    </tr>
                </table>
            }
        </div>
        <input type="submit" value="Add Note For Case" name="btnSubmit" />
        <input type="submit" value="Remove Note For Case" name="btnSubmit" />
    </div>

    <br />
    <input type="submit" value="Save Case To Database" name="btnSubmit" />
    <br />
    <b>@Html.ActionLink("Go back to people grid", "PeopleDashboard")</b>
}

ActionResult NewCase (POST)

[HttpPost]
        public ActionResult NewCase(string btnSubmit, FormCollection form, CaseForm Model)
        {
            RepositoryLesas RepositoryLesas = new RepositoryLesas();
            switch (btnSubmit)
            {
                case "Add Note For Case":
                    #region AddClaimStatus
                    Model.Case.CaseNotes.Add(new CaseNotes());
                    // SET to false as Model is not ready for DB
                    Model.isValidModel = false;
                    // SET message for the user
                    Model.strMessage = "Type new note information in the fields below";

                    return View("~/Views/Case/NewCase.cshtml", Model);
                    #endregion
                case "Remove Note For Case":
                    #region RemoveClaimStatus
                    // Can't remove IF only 1 
                    Model.isValidModel = false;
                    if (Model.Case.CaseNotes.Count == 0 || Model.Case.CaseNotes.Count == 1)
                    {
                        Model.strMessage = "Must be at least one case note before saving case";
                    }
                    else
                    {
                        Model.Case.CaseNotes.RemoveAt(Model.Case.CaseNotes.Count - 1);
                        Model.strMessage = "One case note removed.";
                    }
                    return View("~/Views/Case/NewCase.cshtml", Model);
                    #endregion
                //case "Save Case To Database":
                    //#region submit
                    //if (!Model.isValidModel)
                    //{
                    //    RepositoryLesas.InsertClaim(Model);
                    //    // Do one final check before going to success screen
                    //    Model.strMessage = "Claim data inserted into the database.";
                    //    Model.Person = RepositoryLesas.GetPerson(Model.Person.PersonID);
                    //    // Use to persist data through redirect - Model data will be lost otherwise
                    //    TempData["Model"] = Model;
                    //    return RedirectToAction("Success", new { URL = SuccessClaimUrl });
                    //}
                    //else
                    //{
                    //    Model.strMessage = "Claim data could not be inserted into the database. Missing key fields.";
                    //    return View("~/Views/Claim/AddClaim.cshtml", Model);
                    //}
                    //#endregion
            }
            return View("~/Views/Case/NewCase.cshtml", Model);
        }

我的表单集合

在此处输入图像描述

在我的表单集合中，它只解释案例对象，它应该显示：

字符串消息
isValidModel
案例对象
案例收集
人对象

为什么这个模型没有正确发布？

score 1 · Accepted Answer

您的属性需要 getter 和 setter。DefaultModelBinder创建一个新实例，但可以设置已回发的其属性的CaseForm值，因为它们没有设置器。

public class CaseForm
{
  public string strMessage { get; set; }
  public bool isValidModel { get; set; }
  ....
  public List<Case> Cases { get; set; }
}

请注意，您不需要该参数FormCollection form

另请注意，您正在为某些属性呈现隐藏输入

 @Html.HiddenFor(m => m.Case.CaseRef)

然后为同一属性创建一个文本框

@Html.TextBoxFor(m => m.Case.CaseRef)

您需要删除，HiddenFor因为它只会绑定回发时的第一个值（隐藏输入中的值）并忽略第二个（文本框中的值）

asp.net-mvc-4 - 如何在 MVC 4 中发布此模型（空模型）

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