Asp.Net MVC-将最后创建的ID从操作传递到局部视图 [英] Asp.Net mvc - pass last created id from action to partial view

问题描述

我有两个桌子.学生和年级.成绩有一个外键StudentId，所以我知道哪个学生获得了该成绩.

I have two tables. Student and Grade. Grade has a foreign key StudentId, so I know which student got that Grade.

我有一个操作AddStudent，视图有一个窗体，其中将学生数据数据插入数据库.AddStudent操作将返回PartialView.在该PartialView中，我有新的成绩表.

I have an action AddStudent and view has a form, where I insert student data data into database. AddStudent action returns PartialView. In that PartialView I have new form for Grades.

我需要以某种方式获取StudentId(在AddStudent动作中插入数据后应该以某种方式获取).如何从AddStudent操作将StudentId传递到成绩"局部视图?因为我需要在StudentId中插入成绩"，所以我知道要针对哪个学生成绩.

I need to somehow get StudentId(which I should somehow get after I insert data in AddStudent action). How can you pass StudentId from AddStudent action to Grades partial view? Because I need to insert "Grades" with StudentId so I know to which student Grades are intended.

动作:

        [HttpPost]
    [ValidateAntiForgeryToken]
    public virtual ActionResult CreateStudent(Student student)
    {
        if (ModelState.IsValid)
        {
            db.Students.Add(student);
            db.SaveChanges();
            return PartialView(MVC.Student.Views._AddGrades); // do I have to pass student.Id here to partialView somehow?
        }

        return View(student);
    }

成绩评分:

        [HttpPost]
    [ValidateAntiForgeryToken]
    public virtual ActionResult CreateGrade(Grade grade, int studentId)
    {
        if (ModelState.IsValid)
        {
            grade.studentId = studentId; // how to get this from previous action to my partial view?
            db.Grades.Add(grade);
            db.SaveChanges();
            return PartialView(MVC.Grades.Views._UpdateTableOfGrades);
        }

        return View(grade);
    }

我真的很感谢一些例子.

I would really be thankful for some example.

谢谢！

推荐答案

我认为您应该在控制器上添加Get CreateGrade操作并返回RedirectToAction，如下所示:

I think you should add a Get CreateGrade action on your controller and return a RedirectToAction like this :

return RedirectToAction(MVC.Student.CreateGrade)

您还需要为创建的模型创建一个模型，其中将包含StudentId属性.

You also need to create a Model for the creation that will contain the StudentId property.

如果您使用T4MVC，则可以执行以下操作:

If you use T4MVC you can do this :

return RedirectToAction(MVC.Student.CreateGrade).AddRouteValue("studentid", student.Id);

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