为什么我的应用程序“随机地”停止在MVC中停止更新数据库中的表，直到我停止调试然后再次启动？

时间：2019-08-23 03:52:01

标签： asp.net asp.net-mvc asp.net-mvc-4

我在MVC中遇到了一个奇怪的问题，该应用程序可以正常运行，然后随着带有发布请求的几个视图的运行，数据库不会更新。我没有收到任何错误；该应用程序的行为几乎像往常一样 ，只是没有实际更新与该特定项目关联的表的行。

我发现，如果我停止Visual Studio运行/调试此应用程序，然后再次运行它，则可以再次成功更新表。是什么导致此问题？我可以通过以下设置重现此问题。

模型

Accounts.cs 

    public partial class Accounts
    {
        public int ID { get; set; }
        public string AccountName { get; set; }
        public string Validated { get; set; }
        public string ReValidated { get; set; }

        public virtual Accounts_AE Accounts_AE { get; set; }
    }

Accounts_AE.cs 

    public partial class Accounts_AE
    {
        public int ID { get; set; }
        public string DateNoted { get; set; }
        public string ActionTaken { get; set; }

        public virtual Accounts Accounts { get; set; }
    }

查看模型

DatabaseViewModel.cs 

namespace AccountManagement.ViewModel
{
    public class DatabaseViewModel
    {
        public IEnumerable<Accounts> DBAccounts { get; set; }
        public IEnumerable<Accounts_AE> DBAccountsAE { get; set; }
    }
}

查看

Index.cshtml 

@model AccountManagement.ViewModel.DatabaseViewModel

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>


<table class="table">
    <tr>
        <th>
            AccountName
        </th>
        <th>
            Action
        </th>
    </tr>

    @foreach (var item in Model.DBAccounts)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.AccountName)
            </td>           
            <td>
                <button class="btn btn-primary" onclick="ActionAway(@item.ID)">Perform Check</button>
            </td>
        </tr>
    }

</table>

<div class="modal fade" id="myModal1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content" id="mymodalContent" style="padding:15px">

        </div>
    </div>
</div>

<div class="modal fade" id="myModal2">
    <div class="modal-dialog modal-lg">
        <div class="modal-content" id="mymodalContent2" style="padding:15px">

        </div>
    </div>
</div>

<script>
    var ActionAway = function (theid) {
        var url = "/DB/Validate?id=" + theid;

        $('#mymodalContent').load(url, function () {
            $('#myModal1').modal("show");

        })
    }

</script>

<script>
    var ActionAway2 = function (theid) {
        var url = "/DB/Change?id=" + theid;

        $('#mymodalContent2').load(url, function () {
            $('#myModal2').modal("show");

        })
    }
</script>

ConfirmF.cshtml 

@model AccountManagement.Models.Accounts_AE

@{
    ViewBag.Title = "View";
    Layout = null;
}

<div class="modal-header">
    <a href="#" class="close">&times;</a>
    <h3 class="modal-title">Confirm Action</h3>
</div>
<div class="modal-body" id="myModalBodyDiv1">
    <table>
        <tr>
            <td width="50%">
                <table class="table">
                    <tr>
                        <th>Date Flagged</th>
                        <td>@Html.DisplayFor(model => model.DateNoted)
                    </tr>
                    <tr>
                        <td><button type="button" class="btn btn-primary" id="btnSave">Confirm</button></td>
                    </tr>
                </table>
            </td>
            <td width="50%">
                <table class="table">
                    <tr>
                        <th>Account Name</th>
                        <td>@Html.DisplayFor(x => x.DB_Accounts.AccountName)</td>
                    </tr>                    
                </table>
            </td>
        </tr>
    </table>
</div>


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

    <script>
        $(document).ready(function () {
            $("#btnSave").click(function () {
                $.ajax({
                    success: function () {
                        $("#myModal").modal("hide");
                        location.reload();

                    }
                })
            })

        })
    </script>

Flagged.cshtml 

@model AccountManagement.ViewModel.DatabaseViewModel

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Index</h2>

<table class="table table-striped table-bordered">
    <tr>
        <th>
            AccountName
        </th>
        <th>
            Action Account
        </th>
    </tr>

    @foreach (var item in Model.DBAccounts)
    {
        <tr id="row_@item.ID">
            <td>
                @Html.DisplayFor(modelItem => item.AccountName)
            </td>
            <td>
                Action Account
            </td>
        </tr>
        <tr>
            <th>
                Date Flagged:
            </th>
            <td>
                @Html.DisplayFor(x => x.DBAccountsAE.Where(m => m.ID == item.ID).First().DateNoted)
            </td>
        </tr>
        <tr>
            <th>
                Action Taken
            </th>            
        </tr>
    }

</table>

<div class="modal fade" id="myModal1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <a href="#" class="close" data-dismiss="modal">&times;</a>
                <h3 class="modal-title">Action This Account</h3>
            </div>
            <div class="modal-body" id="myModalBodyDiv1">

            </div>
        </div>
    </div>
</div>


@section Scripts{
    <script>
        var ActionAway = function (theid) {
            var url = "/DB/Edit?id=" + theid;

            $('#myModalBodyDiv1').load(url, function () {
                $('#myModal1').modal("show");

            })
        }

    </script>

}

Edit.cshtml 

@model AccountManagement.Models.Accounts_AE

@{
    ViewBag.Title = "View";
    Layout = null;
}

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

    <div class="form-horizontal">
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        @Html.HiddenFor(model => model.ID)
        @Html.HiddenFor(model => model.DateNoted)

        <table>
            <tr>
                <td width="50%">
                    <table class="table">
                        <tr>
                            <th>Date Flagged</th>
                            <td>@Html.DisplayFor(model => model.DateNoted)
                        </tr>

                        <tr>
                            <th>Action Taken</th>
                            <td>@Html.TextAreaFor(model => model.ActionTaken, new { @class = "form-control", rows = "5" })</td>
                        </tr>

                    </table>
                </td>
                <td width="50%">
                    <table class="table">
                        <tr>
                            <th>Account Name</th>
                            <td>@Html.DisplayFor(x => x.Accounts.AccountName)</td>
                        </tr>                        
                    </table>
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <input type="submit" value="Save" class="btn btn-primary" id="btnSave"/>
                    <button type="button" class="btn btn-primary" data-dismiss="modal">Cancel</button>
                </td>
            </tr>
        </table>
    </div>
}


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

<script>
    $(document).ready(function () {
        $("#btnSave").click(function () {
            $.ajax({
                success: function () {
                    $("#myModal").modal("hide");

                }
            })
        })

    })
</script>

控制器

DBController.cs 

namespace AccountManagement.Controllers
{
    public class DBController : Controller
    {
        private AccountEntities db = new AccountEntities();

        public ActionResult Index()
        {
            DatabaseViewModel DBVM = new DatabaseViewModel();
            DBVM.DBAccounts = db.Accounts.Where(x => x.Validated == null).ToList();
            return View("Index", DBVM);
        }

        public ActionResult Flagged()
        {
            DatabaseViewModel DBVM = new DatabaseViewModel();
            DBVM.DBAccounts = db.Accounts.Where(x => x.Validated == "F" || (x.ReValidated == "R" && x.Validated == null)).ToList();
            DBVM.DBAccountsAE = db.Accounts_AE.ToList();
            return View("Flagged", DBVM);
        }

        public ActionResult Edit(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            Accounts_AE actionableEvents = db.Accounts_AE.Find(id);
            if (actionableEvents == null)
            {
                return HttpNotFound();
            }
            return View(actionableEvents);
        }

        //Edit Save
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Edit(Accounts_AE actionableEvents)
        {
            if (ModelState.IsValid)
            {
                DB_Accounts dB_Accounts = db.DB_Accounts.Where(x => x.ID == actionableEvents.ID).First();
                dB_Accounts.Validated = null;
                dB_Accounts.ReValidated = "R";
                db.Entry(dB_Accounts).State = EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("Flagged");
            }
            return View(actionableEvents);
        }


        public ActionResult Validate(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            DB_Accounts dB_Accounts = db.DB_Accounts.Find(id);
            DB_Accounts_AE dB_Accounts_AE = db.DB_Accounts_AE.Find(id);            
            dB_Accounts_AE.ReviewedBy = User.Identity.Name.ToString();
            dB_Accounts_AE.DateNoted = DateTime.Now.ToString("dd MMM yyyy");
            dB_Accounts.Validated = "F";



            if (ModelState.IsValid)
            {
                db.Entry(dB_Accounts_AE).State = EntityState.Modified;
                db.Entry(dB_Accounts).State = EntityState.Modified;
                db.SaveChanges();
            }

            return View("ConfirmF", dB_Accounts_AE);
        }


        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                db.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}

为重现该问题，我从“索引”页面开始。我单击“执行检查”按钮，这会弹出一个模式弹出窗口（ConfirmF）。我单击弹出窗口上的“确认”按钮，然后有问题的项目从页面中消失。然后，我转到“标记”页面。在这里，我单击“操作”按钮，将其保存，然后返回到“索引”页面。该项目现在已重新出现在页面上。

此时应该发生的事情是当我单击“ Perform Check”时，该项目应该像以前一样消失了。但是，实际上没有任何反应。当我调试程序时，我发现它甚至没有击中控制器！这是怎么回事？

简而言之，为了解释我的程序，“索引”页面上的项目是从表中筛选出来的。单击“执行检查”按钮后，它将在该行的表中更改一个值（从NULL），以便该项目不再包含在过滤器中。在“标记”视图中对其进行操作时，它将值更改回NULL，以便再次在“索引”视图中显示。不幸的是，由于“性能检查”按钮将不再可用于更新表（或点击控制器），因此您现在无法重复这些步骤。

如果我停止调试程序，然后重新启动它，则可以成功使用“执行检查”按钮。另外，如果我启动程序并转到“标记”页面以执行某项操作，然后返回到“索引”页面，我也可以成功使用“执行检查”按钮。

换句话说，如果执行索引->标记的->索引，则“执行检查”将失败。如果执行标记->索引，它将成功。我到底在这里做错了什么？我将不胜感激！

0 个答案:

没有答案
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