C# ASP MVC DropDownList用于不从列表中选择值

我有这样的看法：

@{
    var jobTitles = new List<string>
    {
        "Title1",
        "Title2",
        "Title3",
    };
    var titlesList = new SelectList(jobTitles, Model.Title);
}

在这种情况下，当我的视图渲染时，下拉列表中的选定选项是选择一个选项。我已经调试了列表，所选的值确实是内存中正确的值，但是DropDownListFor并没有这样显示它

编辑：

我在另一个类似这样的EditorTemplate上使用了同样的原理，它可以工作：

var types = new List<string>
{
    "Set Up",
    "Show Start",
    "Break Down"
};
@Html.DropDownListFor(model => model.TimeSlotTask, new SelectList(types), "Select an option", new { @class = "form-control", @required = "required" })

那么与会者的EditorTemplate是：

@{
    var jobTitles = new List<string>
    {
        "Account Manager",
        "Application Engineer",
        "Customer Care",
        "Sales Engineer",
        "Marketing Manager",
        "Product Manager",
        "Trade Show Coordinator",
    };
    var titlesList = new SelectList(jobTitles);
}

<li>
    @Html.HiddenFor(model => model.Id)

    <div class="form-group">
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Name</label>
                @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Job Titless</label>
                @Html.DropDownListFor(model => model.Title, titlesList, "Select an option", new { @class = "form-control", @required = "required" })
                @Html.ValidationMessageFor(model => model.Title, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Show Lead</label>
                @Html.CheckBoxFor(m => m.Lead, new { @class = "form-control" })
            </div>
        </div>
    </div>
</li>

问题是EditorTemplate中的DropDownList for。加载现有实体时，它不会从模型中选择值。然而，当我在Razor中简单地使用foreach循环来迭代与会者集合时，Title属性被正确地设置和显示，只需使用一个函数来显示它

---

因此，我知道它正在从下拉列表中正确设置并保存到模型中，但当重新渲染编辑视图时，如果存在下拉列表，则在指向模型的下拉列表中未选择值。

显示控制器，数据也不应出现在视图中控制器只从数据库中获取实体，正如我所说，设置了这个属性后，我对它进行了调试，设置正确，并将其传递给视图。此外，视图中的这些数据，无论是“标准”还是“非标准”数据，都不意味着这些数据不应该起作用。您确定property Title的值是这三个值之一吗？。请注意，它也可以是var titlesList=new SelectListjobTitles-SelectList的第二个参数无论如何都将被忽略100%正。但是，我确实有另一个下拉列表绑定到不同的列表，在同一页面上，使用不同的编辑器模板，在呈现视图时从下拉列表中正确选择值。razor中的列表设置与razor完全相同，并且使用DropDownList for绑定与razor完全相同。您提到了EditorTemplate-您是否在循环中执行某些操作？

    <span id="addAttendeeButton" class="btn btn-success btn-sm"><i class="fa fa-plus"></i></span><span id="removeAttendeeButton" class="btn btn-danger btn-sm"><i class="fa fa-minus"></i></span>
    <ul id="attendees" style="list-style-type: none; margin: 0; padding: 0;">
        @Html.EditorFor(model => model.Attendees)
    </ul>

        $("#addAttendeeButton").click(function() {
            var id = $('#attendees > li').length;
            $.get('@Url.Action("CreateAttendee")/' + id, function(data) {
                $('#attendees').append(data);
            });
        });
        $("#removeAttendeeButton").click(function() {
            $('#attendees li:last').remove();
        });

@{
    var jobTitles = new List<string>
    {
        "Account Manager",
        "Application Engineer",
        "Customer Care",
        "Sales Engineer",
        "Marketing Manager",
        "Product Manager",
        "Trade Show Coordinator",
    };
    var titlesList = new SelectList(jobTitles);
}

<li>
    @Html.HiddenFor(model => model.Id)

    <div class="form-group">
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Name</label>
                @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Job Titless</label>
                @Html.DropDownListFor(model => model.Title, titlesList, "Select an option", new { @class = "form-control", @required = "required" })
                @Html.ValidationMessageFor(model => model.Title, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="col-md-4">
            <div class="input-group-lg">
                <label>Show Lead</label>
                @Html.CheckBoxFor(m => m.Lead, new { @class = "form-control" })
            </div>
        </div>
    </div>
</li>