Sql server SQL表中具有主标识键列的更新方法和视图的MVC问题

我正在制作简单的应用程序，比如通讯录

我通过实体框架用一个表将我的项目与SQL数据库连接起来。SQL表中的第一行是ID，它是主键和标识字段。当我自动生成编辑视图并尝试运行它时，出现以下错误：

参数字典包含“akvizicje_App_1_6.Controllers.HomeController”中方法“System.Web.Mvc.ActionResult UpdateInt32”的不可为null类型“System.Int32”的参数“id”的null条目。可选参数必须是引用类型、可为null的类型或声明为可选参数。 参数名称：参数

我知道有一个参数具有int id，它不能为null，因为它是主键和标识字段

但我不知道如何解决这个问题。如果有人能帮我

[HttpPost]   
public ActionResult Update(Kontakti model)    
{    
    if (!ModelState.IsValid)    
    {    
        return View("Index", model);    
    }

    Context.Entry(model).State =

    System.Data.Entity.EntityState.Modified;

    Context.SaveChanges();

    return RedirectToAction("Details");    
}

这就是观点

@model Akvizicije_App_1_6.Kontakti

@{
    ViewBag.Title = "Edit"; }

<h2>Edit</h2>


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

    <div class="form-horizontal">
        <h4>Kontakti</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.idKontakt)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

<div>
    @Html.ActionLink("Natrag", "Index") </div>

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

SQL数据库中的模型

web配置连接字符串

和控制器的第一部分

---

我换了标签。谢谢您在哪里调用Update方法？是否正在传递名为“id”的int值？

@model Akvizicije_App_1_6.Kontakti

@{
    ViewBag.Title = "Edit"; }

<h2>Edit</h2>


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

    <div class="form-horizontal">
        <h4>Kontakti</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.idKontakt)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

<div>
    @Html.ActionLink("Natrag", "Index") </div>

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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace Akvizicije_App_1_6
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }
}

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated from a template.
//
//     Manual changes to this file may cause unexpected behavior in your application.
//     Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace Akvizicije_App_1_6
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel.DataAnnotations;
    using System.ComponentModel.DataAnnotations.Schema;

    public partial class Kontakti
    { 
        [Key]
        public int idKontakt { get; set; }
        public string Zupanija { get; set; }
        public string Opcina { get; set; }
        public int PostanskiBroj { get; set; }
        public string NazivNaselja { get; set; }
        public string NazivUlice { get; set; }
        public string KucniBroj { get; set; }
        public string kcbr { get; set; }
        public bool Aktivan { get; set; }
        public string ImeOsobe { get; set; }
        public string PrezimeOsobe { get; set; }
        public string KontaktBroj { get; set; }
        public string Email { get; set; }
        public string Komentar { get; set; }
    }
}

<connectionStrings>    
<add name="AkvizicijeKontaktiEntities" connectionString="metadata=res://*/Model.csdl|res://*/Model.ssdl|res://*/Model.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=SVEN\SQLEXPRESS;initial catalog=AkvizicijeKontakti;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

public class HomeController : Controller
{
    AkvizicijeKontaktiEntities Context = new AkvizicijeKontaktiEntities();
    public ActionResult Index()
    {
        List<Kontakti> model = (from k in Context.Kontakti

                               select k).ToList();

        return View(model);
    }

    public ActionResult Create()
    {
        return View();
    }