Asp.Net Mvc Html.BeginFormSubmit ajax发送两次请求（一个人键入xhr，另一个人发送文档）

Question

我正在使用Asp.Net MVC开发调查应用程序。我有一个名为Index.cshtml的页面，其中包含一个问题表和一个``添加新''按钮。单击按钮后，将使用jQuery打开一个弹出窗口。我正在从控制器中调用视图以填充名为AddOrEdit.cshtml（子页面）的jQuery对话框。我正在添加新的问题和选项。问题是一个文本字段，其选项已添加到可编辑表中。单击submt按钮后，将触发“提交表单”事件（保存或更新）。但是ajax发送两次请求。这些请求之一发送空对象，另一个请求发送完整对象。我在哪里弄错了？

根据我的研究，导致此问题的原因是，不扰人的验证器放置在2个不同的页面上。但这不是我的情况。

[当我在f12中使用chrome进行调试时，两个请求之一的发起者会'jquery'另一个“ other”的发起者。这两个post请求之一的类型显示为'XHR'，另一个是'文档'。

Index.cshtml

@{
ViewBag.Title = "Soru Listesi";
}

<h2>Soru Oluşturma</h2>
<a class="btn btn-success" style="margin-bottom: 10px" 
onclick="PopupForm('@Url.Action("AddOrEdit","Question")')"><i class="fa fa-plus"></i> Yeni Soru Oluştur</a><table id="questionTable" class="table table-striped table-bordered accent-blue" style="width: 100%">
<thead>
    <tr>
        <th>Soru No</th>
        <th>Soru Adı</th>
        <th>Oluşturma Tarihi</th>
        <th>Güncelleme Tarihi</th>
        <th>Güncelle/Sil</th>
    </tr>
</thead>
</table>
<link 
href="https://cdn.datatables.net/1.10.20/css/dataTables.bootstrap4.min.css" rel="stylesheet" />
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" 
rel="stylesheet" />



 @section Scripts{
<script src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.min.js"></script>
<script src="https://cdn.datatables.net/1.10.20/js/dataTables.bootstrap4.min.js"></script>

<script>


    var Popup, dataTable;
    $(document).ready(function() {

        dataTable = $("#questionTable").DataTable({
            "ajax": {
                "url": "/Question/GetData",
                "type": "GET",
                "datatype": "json"
            },
            "columnDefs": [
                { targets: 2 }
            ],
            "scrollX": true,
            "scrollY": "auto",
            "columns": [
                { "data": "QuestionId" },
                { "data": "QuestionName" },
                {
                    "data": "CreatedDate",
                    "render": function(data) { return getDateString(data); }
                },
                {
                    "data": "UpdatedDate",
                    "render": function(data) { return getDateString(data); }
                },
                {
                    "data": "QuestionId",
                    "render": function(data) {
                        return "<a class='btn btn-primary btn-sm' onclick=PopupForm('@Url.Action("AddOrEdit", "Question")/" +
                            data +
                            "')><i class='fa fa-pencil'></i> Güncelle</a><a class='btn btn-danger btn-sm' style='margin-left:5px' onclick=Delete(" +
                            data +
                            ")><i class='fa fa-trash'></i> Sil</a>";
                    },
                    "orderable": false,
                    "searchable": false,
                    "width": "150px"
                }
            ],
            "language": {
                "emptyTable":
                    "Soru bulunamadı, lütfen <b>Yeni Soru Oluştur</b> butonuna tıklayarak yeni soru oluşturunuz. "
            }
        });
    });


    function getDateString(date) {
        var dateObj = new Date(parseInt(date.substr(6)));
        let year = dateObj.getFullYear();
        let month = (1 + dateObj.getMonth()).toString().padStart(2, '0');
        let day = dateObj.getDate().toString().padStart(2, '0');
        return day + '/' + month + '/' + year;
    };


    function PopupForm(url) {
        var formDiv = $('<div/>');
        $.get(url)
            .done(function(response) {
                formDiv.html(response);
                Popup = formDiv.dialog({
                    autoOpen: true,
                    resizable: true,
                    title: 'Soru Detay',
                    modal: true,
                    height: 'auto',
                    width: '700',
                    close: function() {
                        Popup.dialog('destroy').remove();
                    }

                });
            });
    }

    function SubmitForm(form) {
        debugger;
        if (form.checkValidity() === false) {
            debugger;
            event.preventDefault();
            event.stopPropagation();
        }
        form.classList.add('was-validated');
        if ($(form).valid()) {
            var question = {};
            question.questionId = 1111;
            var options = new Array();
            $("#questionForm TBODY TR").each(function() {
                var row = $(this);
                var option = {};
                option.OptionId = row.find("TD").eq(0).html();
                option.OptionName = row.find("TD").eq(1).html();
                options.push(option);
            });
            question.options = options;
            question.responses = new Array();
            $.ajax({
                type: "POST",
                url: form.action,
                data: JSON.stringify(question),
                success: function(data) {
                    if (data.success) {
                        debugger;
                        Popup.dialog('close');
                        dataTable.ajax.reload();
                        $.notify(data.message,
                            {
                                globalPosition: "top center",
                                className: "success",
                                showAnimation: "slideDown",
                                gap: 1000
                            });
                    }
                },
                error: function(req, err) {
                    debugger;
                    alert('req : ' + req + ' err : ' + err.data);
                },
                complete: function(data) {
                    alert('complete : ' + data.status);
                }
            });
        }
    }


    function ResetForm(form) {
        Popup.dialog('close');
        return false;
    }

    function Delete(id) {
        if (confirm('Bu soruyu silmek istediğinizden emin misiniz?')) {
            $.ajax({
                type: "POST",
                url: '@Url.Action("Delete", "Question")/' + id,
                success: function(data) {
                    if (data.success) {
                        dataTable.ajax.reload();
                        $.notify(data.message,
                            {
                                className: "success",
                                globalPosition: "top center",
                                title: "BAŞARILI"
                            })
                    }
                }

            });
        }
    }

</script>
}

AddOrEdit.cshtml

@using MerinosSurvey.Models
@model Questions
@{
Layout = null;
}

@using (Html.BeginForm("AddOrEdit", "Question", FormMethod.Post, new { @class = "needs-validation", 
novalidate = "true", onsubmit = "return SubmitForm(this)", onreset = "return ResetForm(this)", id = 
"questionForm" }))
{
<div class="form-group row">
    @Html.Label("QuestionId", "Soru No", new { @class = "col-form-label col-md-3" })
    <div class="col-md-9">
        @Html.TextBoxFor(model => model.QuestionId, new { @readonly = "readonly", @class = "form-control" })

    </div>
</div>
<div class="form-group row">
    @Html.Label("QuestionName", "Soru Adı", new { @class = "col-form-label col-md-3" })
    <div class="col-md-9">
        @Html.EditorFor(model => model.QuestionName, new { htmlAttributes = new { @class = "form-control", required = "true" } })
        <div class="valid-feedback"><i class="fa fa-check">Süpersin</i></div>
        <div class="invalid-feedback "><i class="fa fa-times"></i></div>
    </div>
</div>


@*<div class="form-group row">
        @Html.LabelFor(model => model.CreatedDate, new { @class = "form-control-label col-md-3"})
        <div class="col-md-9">
            @Html.EditorFor(model => model.CreatedDate, "{0:yyyy-MM-dd}", new { htmlAttributes = new { @class = "form-control", type = "date", @readonly = "readonly",required="false" } })

        </div>
    </div>*@


<div class="table-wrapper form-group table-responsive-md">
    <div class="table-title">
        <div class="form-group row">
            <div class="col-md-9">Seçenekler</div>
            <div class="col-md-3">
                <a class="btn btn-success add-new" style="margin-bottom: 10px"><i class="fa fa-plus"></i>Seçenek Ekle</a>
            </div>
        </div>
    </div>
    <table class="table optionTable">
        <thead>
            <tr>
                <th scope="col">Seçenek Id</th>
                <th scope="col">Seçenek Adı</th>
                <th scope="col">Güncelle/Sil</th>
            </tr>

        </thead>
        <tbody>
            @*@foreach (Options options in Model.Options)
                {
                    <tr>
                        <td>@options.OptionId</td>
                        <td>@options.OptionName</td>
                        <td>
                            <a class="add btn btn-primary btn-sm" title="Add" data-toggle="tooltip"> 
<i class="fa fa-check">Onayla</i></a>
                            <a class="edit btn btn-secondary btn-sm" title="Edit" data-toggle="tooltip"><i class="fa fa-pencil">Güncelle</i></a>
                            <a class="delete btn-danger btn-sm" title="Delete" data-toggle="tooltip"><i class="fa fa-trash">Sil</i></a>
                        </td>
                    </tr>
                }*@
        </tbody>
    </table>
</div>


<div class="form-group row">
    <input type="submit" value="Submit" class="btn btn-primary" id="btnSubmit" />
    <input type="reset" value="Reset" class="btn btn-secondary" />
</div>
}
<script>
 $(document).ready(function () {
     $('[data-toggle="tooltip"]').tooltip();
     //var actions = $("table.optionTable td:last-child").html();

     var actions =' <a class="add btn btn-primary btn-sm" title="Add" data-toggle="tooltip"><i 
    class="fa fa-check">Onayla</i></a>' + '<a class="edit btn btn-secondary btn-sm" title="Edit" data toggle="tooltip"><i class="fa fa-pencil">Güncelle</i></a>' +'<a class="delete btn-danger btn-sm" title="Delete" data-toggle="tooltip"><i class="fa fa-trash">Sil</i></a>';

    // Append table with add row form on add new button click
    $(".add-new").click(function () {
        $(this).attr("disabled", "disabled");
        var index = $("table.optionTable tbody tr:last-child").index();
        var row = '<tr>' +
            '<td><input type="text" class="form-control" name="optionId" id="optionId"></td>' +
            '<td><input type="text" class="form-control" name="optionId" id="optionName"></td>' +
            '<td>' + actions + '</td>' +
        '</tr>';
        $("table.optionTable").append(row);
        $("table.optionTable tbody tr").eq(index + 1).find(".add, .edit").toggle();
        $('[data-toggle="tooltip"]').tooltip();
    });



    // Add row on add button click
    $(document).on("click", ".add", function () {
        var empty = false;
        var input = $(this).parents("tr").find('input[type="text"]');
        input.each(function () {
            if (!$(this).val()) {
                $(this).addClass("error");
                empty = true;
            } else {
                $(this).removeClass("error");
            }
        });
        $(this).parents("tr").find(".error").first().focus();
        if (!empty) {
            input.each(function () {
                $(this).parent("td").html($(this).val());
            });
            $(this).parents("tr").find(".add, .edit").toggle();
            $(".add-new").removeAttr("disabled");
        }
    });

    // Edit row on edit button click
    $(document).on("click", ".edit", function () {

        $(this).parents("tr").find("td:not(:last-child)").each(function () {
            $(this).html('<input type="text" class="form-control" value="' + $(this).text() + '">');
        });
        $(this).parents("tr").find(".add, .edit").toggle();
        $(".add-new").attr("disabled", "disabled");
    });



    // Delete row on delete button click
    $(document).on("click", ".delete", function () {
        debugger;
        $(this).parents("tr").remove();
        $(".add-new").removeAttr("disabled");
    });
});

Answer 1

event.preventDefault（）;移动此行并将其立即放在函数SubmitForm（form）{]之后

如下所示：

function SubmitForm(form) { 
    debugger; 
event.preventDefault(); 
if (form.checkValidity() === false) { 
debugger; 

event.stopPropagation(); 
} 
form.classList.add('was-validated'); 
if ($(form).valid()) { 
var question = {}; 
question.questionId = 1111; 
var options = new Array(); 
$("#questionForm TBODY TR").each(function() { 
var row = $(this); 
var option = {}; 
option.OptionId = row.find("TD").eq(0).html(); 
option.OptionName = row.find("TD").eq(1).html(); 
options.push(option); 
}); 
question.options = options; 
question.responses = new Array(); 
$.ajax({ 
type: "POST", 
url: form.action, 
data: JSON.stringify(question), 
success: function(data) { 
if (data.success) { 
debugger; 
Popup.dialog('close'); 
dataTable.ajax.reload(); 
$.notify(data.message, 
{ 
globalPosition: "top center", 
className: "success", 
showAnimation: "slideDown", 
gap: 1000 
}); 
} 
}, 
error: function(req, err) { 
debugger; 
alert('req : ' + req + ' err : ' + err.data); 
}, 
complete: function(data) { 
alert('complete : ' + data.status); 
} 
}); 
} 
}