将选定值的下拉列表传递给更改选定项目的控制器

Question

尝试将所选值（在本例中为 studentid）传递给 BeginForm。

查看

@using (Html.BeginForm("DDSubmit", "Home",new { id=Model.studentID}, FormMethod.Post))
{
    @Html.DropDownListFor(m => m.studentID, Model.DDList, "Please Select",new { onchange = "this.form.submit();" })
}

控制器动作

 public ActionResult DDSubmit(int id)
    {
        var info = (from r in entity.STUDENTS where r.Student_Id == id select r).ToList();
        return View(info);            
    }

型号

public class DDModel
{
    public List<SelectListItem> DDList { get; set; }
    public int studentID { get; set; }
    public string studentName { get; set; }
}

Answer 1

终于想通了

查看

 @using (Html.BeginForm("DDSubmit", "Home", FormMethod.Post))
{
    @Html.DropDownListFor(m => m.studentID, Model.DDList, "Please Select",new { onchange = "this.form.submit();" })
}

动作

public ActionResult DDSubmit(DDModel ddlist)
    {
        int id = ddlist.studentID;
        var info = (from r in entity.STUDENTS where r.Student_Id == id select r).ToList();
        return View(info);            
    }