Question

我有以下代码，并希望使用下拉列表更新用户角色，然后使用下拉列表中的更新选项保留此页面。我以为我可以将redirectToAction用于GET ActonResult，但它会转到POST ActionResult。如何使用新选项更新下拉列表以保持相同的视图？感谢

    [HttpGet]
    public ActionResult Details(Guid? id)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }

        Employee employee = db.Employees.Find(id);

        EmployeeViewModel empv = new EmployeeViewModel();
        empv.FirstName = employee.FirstName;
        empv.LastName = employee.LastName;
        empv.NetworkLoginID = employee.NetworkLoginID;
        empv.PersonID = employee.PersonID;
        empv.DataStatusID = employee.DataStatusID;
        empv.EmployeeGUID = employee.EmployeeGUID;




        Guid UserRoleGuid = (from e in db.EmployeeToUserRoles
                           where e.EmployeeGUID == empv.EmployeeGUID
                             select e.RoleGUID).FirstOrDefault();



        empv.RoleID = UserRoleGuid;

        if (employee == null)
        {
            return HttpNotFound();
        } 
        PopulatedDropDown(empv.RoleID);

        return View(empv);
    }
    [HttpPost]
    public ActionResult Details(Guid EmployeeGUID, Guid Roles)
    {
        if (ModelState.IsValid)
        {

            EmployeeToUserRole emp = new EmployeeToUserRole();
            //check if employee was in role and update column

            var inrole = from d in db.EmployeeToUserRoles
                         where d.EmployeeGUID == EmployeeGUID                       
                         select d.EmployeeRoleGUID;

            int count = inrole.Count();

            if (count > 0  )
            {
                emp = db.EmployeeToUserRoles.Where(s => s.EmployeeGUID == EmployeeGUID).FirstOrDefault<EmployeeToUserRole>();

                emp.RoleGUID = Roles;
                db.Entry(emp).State = EntityState.Modified;


                db.SaveChanges();
            }

            else
            { 

            emp.EmployeeRoleGUID = Guid.NewGuid();
            emp.RoleGUID = Roles;
            emp.EmployeeGUID = EmployeeGUID;

            db.EmployeeToUserRoles.Add(emp);
            db.SaveChanges();
            }


            PopulatedDropDown(Roles);

            RedirectToAction("Details", new { id = emp.EmployeeGUID });

        }

        return View();


    }

Answer 1

您需要返回RedirectToAction结果。

return RedirectToAction("Details", new { id = emp.EmployeeGUID });

这将使浏览器对“详细信息”操作执行GET请求，其值为emp.EmployeeGUID。在从数据库中读取Employee实体后，您需要在其中设置视图模型的相应属性（用于角色）。

保存后更新当前查看MVC 5

1 个答案: