ASP.NET MVC 用户登录后如何使用用户数据

Question

如果我有创建假期请求的表单：

 @using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    <div class="form-horizontal" style=" position:relative; top:20px;border-radius: 0px; border-color: #F47B20; border-style: solid; border-width: 5px; background-repeat: no-repeat; background-position: right; padding: 60px; background-size: contain; background-color:white ">
        <h2 align="center">Holiday Request Form</h2>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.EmployeeID, "Employee Name", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.DropDownList("EmployeeID", null, htmlAttributes: new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.EmployeeID, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.StartDate,"Start Date", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.StartDate, "Start Date",new { htmlAttributes = new { @class = "form-control", autocomplete = "off" } })
                @Html.ValidationMessageFor(model => model.StartDate, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.FinishDate, "Finish Date",htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.FinishDate, new { htmlAttributes = new { @class = "form-control", autocomplete = "off" } })
                @Html.ValidationMessageFor(model => model.FinishDate, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.HoursTaken,"Hours Requested", htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.HoursTaken, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.HoursTaken, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            @Html.LabelFor(model => model.Comments, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.TextAreaFor(
             model => model.Comments,
  new { placeholder = "Enter Dates and how many Hours per Date Here.", style = "width: 400px; height: 200px;" })
                @Html.ValidationMessageFor(model => model.Comments, "", new { @class = "text-danger" })
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Submit" class="btn btn-warning"  />
            </div>
        </div>
    </div>
}

但是，不是员工选择其下拉列表的名称，而是输入将基于登录。

我已经想出了如何从登录中获取员工 ID，但我不确定如何在表单中使用它。

这就是我使用适用于我的应用程序其他方面的控制器抓取它的方式

string name = Session["Name"].ToString();
        var EmployeeIDCatch = db.Employees.Where(s => s.Email.Equals(name)).Select(s => s.EmployeeID);

控制器：

 public ActionResult Create()
    {
        ViewBag.EmployeeID = new SelectList(db.Employees, "EmployeeID", "FullName");
        return View();
        string name = Session["Name"].ToString();
        var EmployeeIDCatch = db.Employees.Where(s => s.Email.Equals(name)).Select(s => s.EmployeeID);
    }
    // POST: HolidayRequestForms/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "RequestID,EmployeeID,StartDate,FinishDate,HoursTaken,Comments,YearCreated,MonthCreated,DayCreated,YearOfHoliday,Approved")] HolidayRequestForm holidayRequestForm)
    {
        if (ModelState.IsValid)
        {
            db.HolidayRequestForms.Add(holidayRequestForm);
            db.SaveChanges();
            SendMailToAreaManager();
            SendMailToManager();
            return RedirectToAction("Index","Calendar");
        }
        ViewBag.EmployeeID = new SelectList(db.Employees, "EmployeeID", "FullName", holidayRequestForm.EmployeeID);
        return View(holidayRequestForm);
    }

Answer 1

首先从 html 表单中删除以下代码：

<div class="form-group">
     @Html.LabelFor(model => model.EmployeeID, "Employee Name", htmlAttributes: new { @class = "control-label col-md-2" })
     <div class="col-md-10">
         @Html.DropDownList("EmployeeID", null, htmlAttributes: new { @class = "form-control" })
         @Html.ValidationMessageFor(model => model.EmployeeID, "", new { @class = "text-danger" })
    </div>
</div>

现在更新您的 Create POST 方法，如下所示：

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "RequestID,StartDate,FinishDate,HoursTaken,Comments,YearCreated,MonthCreated,DayCreated,YearOfHoliday,Approved")] HolidayRequestForm holidayRequestForm)
{
    if (ModelState.IsValid)
    {
        string name = Session["Name"].ToString();
        var employeeID = db.Employees.Where(s => s.Email.Equals(name))
                           .Select(s => s.EmployeeID).FirstOrDefault();
        holidayRequestForm.EmployeeID = employeeID;
        db.HolidayRequestForms.Add(holidayRequestForm);
        db.SaveChanges();
        SendMailToAreaManager();
        SendMailToManager();
        return RedirectToAction("Index","Calendar");
    }
    return View(holidayRequestForm);
}