Asp.net mvc 对记录创建MVC进行验证时出错

我已经对我的代码进行了广泛的比较，但无法找出错误所在

形势

我有一张带两个外键的学生（校友）表，组（Grupo）和教师（Empleado）

我有一个教师（Empleado）表，表中有三个外键，分别是SCHOOL（Escuela）、GROUP（Grupo）和ROLE（Puesto）

问题

尝试创建除组和教师（从下拉列表中）之外的所有学生记录时，出现以下错误： 具有键“Emplicatoid”的ViewData项的类型为“System.Int32”，但必须为“IEnumerable”类型

然而，当我尝试对教师记录进行同样的操作时，一切都正常，我会在下拉列表旁边得到相应的验证消息，这是应该的

这两种情况的代码显然不相同，但结构基本相同

以下是两组代码：

来自学生

控制器

   public ActionResult Create()
    {

        var AluGru = from g in db.Grupoes
                     where g.ID != 1
                     select g;

        var AluEmp = from e in db.Empleadoes
                     where e.PuestoID != 1
                     select e;

        ViewBag.GrupoID = new SelectList(AluGru, "ID", "Grupo1");
        ViewBag.EmpleadoID = new SelectList(AluEmp, "ID", "FullName");

        return View();
    }

    // POST: Alumnoes/Create
    // 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 ActionResult Create([Bind(Include = "ID,Nombre,Apellido,Telefono,Estado,GrupoID,EmpleadoID")] Alumno alumno)
    {
        if (ModelState.IsValid)
        {
            db.Alumnoes.Add(alumno);
            db.SaveChanges();
            return RedirectToAction("../");
        }

        ViewBag.GrupoID = new SelectList(db.Grupoes, "ID", "Grupo1", alumno.GrupoID);
        ViewBag.EmlpeadoID = new SelectList(db.Empleadoes, "ID", "Nombre", alumno.EmpleadoID);

        return View(alumno);
    }

模型

看法

模型

公共部分类Empleado
{
[System.Diagnostics.CodeAnalysis.SuppressMessage（“Microsoft.Usage”，“CA2214:DoNotCallOverridableMethodsInConstructors”）]
公共雇员
{
this.Alumnoes=new HashSet（）；
}
公共int ID{get；set；}
[必需（AllowEmptyStrings=false，ErrorMessage=“Nombre es requeriedo”）]
公共字符串Nombre{get；set；}
[必需（AllowEmptyStrings=false，ErrorMessage=“Nombre es requeriedo”）]
公共字符串Apellido{get；set；}
公共字符串全名{get{return Nombre+“”+Apellido；}
公共整数集合{get；set；}
公共int PuestoID{get；set；}
公共int GrupoID{get；set；}
公共虚拟Escuela Escuela{get；set；}
公共虚拟Grupo Grupo{get；set；}
公共虚拟Puesto Puesto{get；set；}
[System.Diagnostics.CodeAnalysis.SuppressMessage（“Microsoft.Usage”，“CA2227:CollectionPropertiesShouldBreadOnly”）]
公共虚拟ICollection校友{get；set；}
}

看法

@model\u 3E\u III.Models.Empleado
@{
ViewBag.Title=“创建”；
}
创造
@使用（Html.BeginForm（））
{
@Html.AntiForgeryToken（）
雇佣

@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@LabelFor（model=>model.Nombre，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Nombre，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Nombre，“，new{@class=“text danger”}）
@LabelFor（model=>model.Apellido，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Apellido，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Apellido，“，new{@class=“text danger”}）
@LabelFor（model=>model.escueled，“Escuela”，htmlAttributes:new{@class=“controllabel col-md-2”}）
@DropDownList（“escueled”，null，“Selecciona una escuela”，htmlAttributes:new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.escueled，“，new{@class=“text danger”}）
@LabelFor（model=>model.PuestoID，“Puesto”，htmlAttributes:new{@class=“controllabel col-md-2”}）
@DropDownList（“PuestoID”，null，“Selecciona un puesto”，htmlAttributes:new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.PuestoID，“，new{@class=“text danger”}）
@LabelFor（model=>model.GrupoID，“Grupo”，htmlAttributes:new{@class=“controllabel col-md-2”}）
@DropDownList（“GrupoID”，null，“Selecciona un grupo”，htmlAttributes:new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.GrupoID，“，new{@class=“text danger”}）
}
@ActionLink（“返回列表”和“./”）
@节脚本{
@Scripts.Render（“~/bundles/jqueryval”）
}

---

据我所知，两者都可以正常工作，有什么我遗漏的吗？

不确定这对主要问题是否重要，但有一个bug。在您指定的创建方法的GET版本中：ViewBag.EmpleadoID=new SelectList（AluEmp，“ID”，“FullName”）；但之后在POST版本中，您将根据Nombre属性而不是全名分配文本：ViewBag.EmlpeadoID=new SelectList（db.Empleadoes，“ID”，“Nombre”，alumno.EmpleadoID）；我从FullName恢复到Nombre，得到了相同的错误，顺便说一句，错误指向这一行：第61行：@Html.DropDownList（“Emplicatoid”，null，“Seleciona un maestro”，htmlAttributes:new{@class=“form control”}），考虑到填充的所有字段，它可以用FullName保存到数据库中。

public partial class Alumno
{
    public int ID { get; set; }
    [Required(AllowEmptyStrings = false, ErrorMessage = "Nombre es requerido")]
    public string Nombre { get; set; }
    [Required(AllowEmptyStrings = false, ErrorMessage = "Apellido es requerido")]
    public string Apellido { get; set; }
    [Required(AllowEmptyStrings = false, ErrorMessage = "Telefono es requerido")]
    public string Telefono { get; set; }
    [Required]
    public string Estado { get; set; }
    [Required]
    public int GrupoID { get; set; }
    [Required]
    public int EmpleadoID { get; set; }


    public virtual Grupo Grupo { get; set; }
    public virtual Empleado Empleado { get; set; }
}

@model _3E_III.Models.Alumno

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>


@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
    <h4>Alumno</h4>
    <hr />
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    <div class="form-group">
        @Html.LabelFor(model => model.Nombre, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Nombre, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Nombre, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Apellido, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Apellido, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Apellido, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Telefono, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Telefono, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Telefono, "", new { @class = "text-danger" })
        </div>
    </div>

    <div id="hidestate" class="form-group">
        @Html.LabelFor(model => model.Estado, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Estado, new { htmlAttributes = new { @class = "form-control", @Value = "Inactivo" } })
            @Html.ValidationMessageFor(model => model.Estado, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.GrupoID, "Grupo", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DropDownList("GrupoID", null, "Selecciona un grupo", htmlAttributes: new { @class = "form-control" })
            @Html.ValidationMessageFor(model => model.GrupoID, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.EmpleadoID, "Maestro", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DropDownList("EmpleadoID", null, "Selecciona un maestro", htmlAttributes: new { @class = "form-control" })
            @Html.ValidationMessageFor(model => model.EmpleadoID, "", new { @class = "text-danger" })
        </div>
    </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "../")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}

    public ActionResult Create()
    {

        var GID = (from g in db.Grupoes
                   where g.ID != 1
                   select g);

        var PID = (from p in db.Puestoes
                   where p.ID != 1
                   select p);

        ViewBag.EscuelaID = new SelectList(db.Escuelas, "ID", "Nombre");
        ViewBag.GrupoID = new SelectList(GID, "ID", "Grupo1");
        ViewBag.PuestoID = new SelectList(PID, "ID", "Puesto1");
        return View();
    }

    // POST: Empleadoes/Create
    // 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 ActionResult Create([Bind(Include = "ID,Nombre,Apellido,EscuelaID,PuestoID,GrupoID")] Empleado empleado)
    {
        if (ModelState.IsValid)
        {
            db.Empleadoes.Add(empleado);
            db.SaveChanges();
            return RedirectToAction("../");
        }

        ViewBag.EscuelaID = new SelectList(db.Escuelas, "ID", "Nombre", empleado.EscuelaID);
        ViewBag.GrupoID = new SelectList(db.Grupoes, "ID", "Grupo1", empleado.GrupoID);
        ViewBag.PuestoID = new SelectList(db.Puestoes, "ID", "Puesto1", empleado.PuestoID);
        return View(empleado);
    }

public partial class Empleado
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Empleado()
    {
        this.Alumnoes = new HashSet<Alumno>();
    }

    public int ID { get; set; }
    [Required(AllowEmptyStrings = false, ErrorMessage = "Nombre es requerido")]
    public string Nombre { get; set; }
    [Required(AllowEmptyStrings = false, ErrorMessage = "Nombre es requerido")]
    public string Apellido { get; set; }

    public string FullName { get { return Nombre + " " + Apellido; } }

    public int EscuelaID { get; set; }
    public int PuestoID { get; set; }
    public int GrupoID { get; set; }

    public virtual Escuela Escuela { get; set; }
    public virtual Grupo Grupo { get; set; }
    public virtual Puesto Puesto { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Alumno> Alumnoes { get; set; }
}

@model _3E_III.Models.Empleado

@{
    ViewBag.Title = "Create";
}

<h2>Create</h2>


@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h4>Empleado</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.Nombre, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Nombre, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Nombre, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Apellido, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Apellido, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Apellido, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.EscuelaID, "Escuela", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("EscuelaID", null, "Selecciona una escuela", htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.EscuelaID, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.PuestoID, "Puesto", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("PuestoID", null, "Selecciona un puesto", htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.PuestoID, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.GrupoID, "Grupo", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("GrupoID", null, "Selecciona un grupo", htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.GrupoID, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "../")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")
}