MVC Post 请求始终返回 IIS 错误 500，但适用于邮递员
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【中文标题】MVC Post 请求始终返回 IIS 错误 500，但适用于邮递员【英文标题】：MVC Post request always returns IIS error 500 but works with postman 【发布时间】：2021-12-17 19:49:27 【问题描述】：我正在尝试向 IIS 中托管的 webapi 应用程序发送发布请求。我总是在发布请求时收到错误 500，但获取请求工作正常。下面是我的代码
型号：
public class LineModel
[Key]
public string ID get; set;
public string No get; set;
public string Name get; set;
public string Title get; set;
public string Code1 get; set;
public string Code2 get; set;
public DateTime Date get; set;
public string Type get; set;
public string Remarks get; set;
public string Status get; set;
public List<SubLine> SubLines get; set;
显示表单的 Ajax 代码：
$(function ()
$(".surveyType").click(function ()
var surveyType = $(this).attr("data-bind");
$.ajax(
url: "/Aella/Create/",
data: "surveyCode": surveyType ,
success: function (data)
console.log(data);
$('#Question').html(data);
;
);
);
Ajax 调用发布请求：
$('body').on('click','#submit-request', function ()
var formData = $("#create-request").serialize();
console.log(formData);
$.ajax(
url: "/Aella/Create/",
data: formData,
type: "POST",
dataType: 'json',
contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
success: function (data)
console.log(data);
);
);
获取请求：
[HttpGet]
public ActionResult Create(string surveyCode)
questions = GetSurveyQuestions(surveyCode);
LineModel model = new LineModel
SubLines = questions.Select(a => new SubLine()
Question = a.questionField,
Code = a.codeField,
Type = a.question_TypeField.ToString(),
Survey_Type = a.survey_TypeField,
Response = "",
Remark = ""
).ToList(),
Type = surveyCode,
Date = DateTime.Now
;
return View(model);
发布方式：
[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Create(LineModel lineModel)
if(ModelState.IsValid)
lineModel.Status = "Open";
foreach(var item in lineModel.SubLines)
if(item.Type == "Remark")
item.Remark = item.Response;
item.Response = "";
HttpClient client = new HttpClient
BaseAddress = new Uri(ConfigurationManager.AppSettings["lineModelLink"].ToString())
;
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
jsonContent = JsonConvert.SerializeObject(lineModel);
contentString = new StringContent(jsonContent, Encoding.UTF8, "application/json");
contentString.Headers.ContentType = new MediaTypeHeaderValue("application/json");
HttpResponseMessage response = new HttpResponseMessage();
try
response = await client.PostAsync(ConfigurationManager.AppSettings["lineModelLink"].ToString(), contentString);
catch(HttpRequestException ex)
ErrorController.LogError(ex);
ViewBag.Response = JsonConvert.DeserializeObject(responseStr);
if (lineModel.lineModelLines.Count > 0)
ViewBag.IsQuestionAvailable = true;
return View(lineModel);
[...]
[...]
邮递员请求：
"No":"",
"Name":"",
"Title":"",
"Code1":"",
"Code2":"",
"Date":"2021-10-25T00:00:00",
"Type":"SEC",
"Remarks":"",
"Status":"Open",
"SubLines":
[
"Code":"01",
"Question":"How did you learn about the job opening? ",
"Type":"Defined",
"Survey_Type":"SEC",
"Response":"05",
"Remark":""
,
"Code":"02",
"Question":"The job description/requirements were clear and understandable",
"Type":"1-4",
"Survey_Type":"SEC",
"Response":"04",
"Remark":""
,
"Code":"03",
"Question":"It was easy and convenient applying for the position",
"Type":"1-4",
"Survey_Type":"SEC",
"Response":"04",
"Remark":""
,
"Code":"04",
"Question":"The recruiter was professional.",
"Type":"1-4",
"Survey_Type":"SEC",
"Response":"02",
"Remark":""
]
表单（主视图）：
@using (Html.BeginForm("Create", "Aella", FormMethod.Post, new id = "create-request", enctype = "multipart/form-data" ))
@Html.AntiForgeryToken()
<div class="">
@Html.ValidationSummary(true, "", new @class = "text-danger" )
<div id="survey-header" class="survey-shape-border">
@Html.EditorFor(model => model.No, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Name, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Title, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Code1, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Code2, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Date, new htmlAttributes = new @class = "input100", @readonly = "readonly" )
@Html.EditorFor(model => model.Type, new htmlAttributes = new @class = "input100", @readonly = "readonly" )
@Html.EditorFor(model => model.Remarks, new htmlAttributes = new @class = "input100" )
@Html.EditorFor(model => model.Status, new htmlAttributes = new @class = "input100" )
</div>
@foreach (var line in Model.SubLines)
@Html.Partial("_Lines", line)
<div class="display-none">
<button type="button" value="Create" class="btn-lg" id="submit-request">Submit Survey</button>
</div>
</div>
局部视图：
@using HtmlHelpers.BeginCollectionItem;
<div class="">
@using (Html.BeginCollectionItem("SubLines"))
<div>
@Html.HiddenFor(model => model.ID)
@Html.HiddenFor(model => model.Type)
@Html.HiddenFor(model => model.Type)
@Html.HiddenFor(model => model.Question)
@Html.HiddenFor(m => m.Code)
</div>
if (Model.Type == "Defined")
<div class="userDefined_6 survey-line-response">
<label> @Html.RadioButtonFor(model => model.Response, "01")<span>Job Board</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "02")<span>Careers Website</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "03")<span>Linkedin</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "04")<span>Friend/Colleague</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "05")<span>Recruiter</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "06")<span>Others(Please State)</span></label>
</div>
if (Model.Type == "1-4")
<div class="userDefined_4 survey-line-response">
<label> @Html.RadioButtonFor(model => model.Response, "01")<span>Strongly Disagree</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "02")<span>Disagree</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "03")<span>Agree</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "04")<span>Strongly Agree</span></label>
</div>
if (Model.Type == "1-5")
<div class="userDefined_5 survey-line-response">
<label> @Html.RadioButtonFor(model => model.Response, "01")<span>1</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "02")<span>2</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "03")<span>3</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "04")<span>4</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "05")<span>5</span></label>
</div>
if (Model.Type == "1-15")
<div class="userDefined_10 survey-line-response">
<label> @Html.RadioButtonFor(model => model.Response, "01")<span>1</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "02")<span>2</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "03")<span>3</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "04")<span>4</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "05") <span> 5 </span></label>
<label> @Html.RadioButtonFor(model => model.Response, "06")<span>6</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "07")<span>7</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "08")<span>8</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "09")<span>9</span></label>
<label> @Html.RadioButtonFor(model => model.Response, "10")<span>10</span></label>
</div>
if (Model.Type == "Open")
<div class="userDefined_Narration survey-line-response">
@Html.EditorFor(model => model.Response, new htmlAttributes = new @class = "form-control" )
@Html.ValidationMessageFor(model => model.Response, "", new @class = "text-danger" )
</div>
</div>
来自服务器的响应：
HTTP/1.1 500 Internal Server Error
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/8.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Wed, 03 Nov 2021 12:15:35 GMT
Content-Length: 36
"Message":"An error has occurred."
为此花费了几个小时。由于我缺乏答案，我将非常感谢您的帮助。
【问题讨论】：
可能是你的 ajax 函数。尝试添加 type = "POST" 谢谢。我已更新 Ajax 帖子代码库以供您查看 【参考方案1】：您的 ajax 后请求有一个包
url: "/Survey/CreateSurvey/",
但您的操作是创建。您必须调整动作名称。
似乎Get动作应该在同一个控制器中，但它也有一个奇怪的url
url: "/Aella/Create/",
修复这些错误后，尝试一次调试应用程序的其他部分。由于我可以在您的部分视图中看到很多我以前从未见过的 html 助手，我不确定它们是否生成了可以提交的正确 mvc html。所以恕我直言，评论部分观点并首先尝试将主要观点作为工作。在此之后，您可以继续逐行添加部分视图。
【讨论】：
我将surveyCode参数传递给get方法，以便更新模型并在成功时呈现视图 谢谢，但是如何调用 Post 方法呢？你能显示代码吗？ 感谢您的关注。我已更新代码供您查看。 @hopeforall。谢谢，但我还是看不到你的观点 我已经更新了代码。正确的网址是“/Aella/Create”【参考方案2】：关于代码的一切都很好，我观察到服务器上的证书已过期，因此出现错误。谢谢大家
【讨论】：
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