Javascript 如何在警报中打印ASP.NET MVC的模型值？

我有一个MVC代码，它将日期时间分为两个输入字段，还有一个保存更改的按钮

@model WorkOrderDetailsViewModel
<div class="col-sm-3">
    <span>Start Date:@Html.TextBoxFor(m => m.StartDateTime, new { @class = "form-control", id="StartDate", @placeholder = "MM/DD/YYYY" })</span>
</div>
<div class="col-sm-3">
    <span>Start Time:@Html.TextBoxFor(m => m.StartDateTime, new { @class = "form-control", id="StartTime", @placeholder = "MM/DD/YYYY" })</span>
</div>

<div class="row">
    <button id="changeDate" class="btn btn-sm btn-primary pull-right">Save Changes</button>
</div>

---

以下代码将在警报框中显示日期和时间

$("#changeDate").click(function () {

    var startDate = $("#StartDate").val();
    var startTime = $("#StartTime").val();

    alert("Date and time: " + startDate + " - " + startTime )) {
}); 

---

以下代码将在警报框中显示日期和时间

$("#changeDate").click(function () {

    var startDate = $("#StartDate").val();
    var startTime = $("#StartTime").val();

    alert("Date and time: " + startDate + " - " + startTime )) {
}); 

$("#changeDate").click(function () {
    alert($("#StartDate").val() + " - " +  $("#StartTime").val())
});