如何修复 MVC 应用程序中的"System.ArgumentException: 'Value cannot be null or empty. Parameter name: name'"？

Question

我一直在做一个夏季项目，在这个项目中，我们必须创建一个投资组合web应用程序，让人们可以浏览许多潜在的候选人并选择最好的候选人。我创建了一个SQL数据库，里面有信息，以及他们对0-5数字编程语言的信心。我已经创建了MVC应用程序，并试图创建一个新的候选者，但我遇到了这个错误，并且以前没有用这种语言编码的经验，所以不确定该怎么做。这是我的代码：

@{
ViewBag.Title = "Create";
}
<h2>Create</h2>

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

<div class="form-horizontal">
<h4>Candidate</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(model => model.Id, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Id, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Id, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.First_Name, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.First_Name, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.First_Name, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Last_Name, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Last_Name, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Last_Name, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Date_of_birth, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Date_of_birth, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Date_of_birth, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Location, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Location, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Location, "", 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.C__NET___ASP, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.C__NET___ASP, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.C__NET___ASP, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CSS, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.CSS, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.CSS, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.HTML, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.HTML, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.HTML, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Java, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Java, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Java, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.JavaScript, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.JavaScript, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.JavaScript, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Python, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Python, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Python, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Python_Flask, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Python_Flask, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Python_Flask, "", 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", "Index")
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}

任何解决这个问题或以另一种方式参与这个项目的帮助都将是惊人的！

Answer 1

它是由变量名C__NET___ASP中的__(双下划线(引起的
您可以使用C_NET_ASP或CNetAsp来解决此问题。

我发现ASP报告了类似的错误。NET核心：https://github.com/dotnet/aspnetcore/issues/18913