如何在ASP.NET MVC 5中返回和呈现视图后执行代码

这是我遇到的问题-我创建了一个具有开始和停止按钮的视图。现在，当用户单击开始按钮时，我将布尔变量start设置为true，并更新一些数据库记录。我需要做的是，一旦更新记录，返回并呈现相同的视图，然后进入一个方法，该方法将继续更新数据库记录，直到用户单击停止按钮-该按钮将启动变量设置为false，然后停止代码更新数据库

我尝试过使用OnResultExecuted操作过滤器，该过滤器在返回视图时触发，但在呈现视图之前不会触发，这使得用户无法在循环中单击停止按钮

非常感谢您的任何建议！下面是代码片段

视图：

控制器：

    using V1.ActionFilters;
    using V1.Models;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web.Mvc;

    namespace V1.Controllers
    {
    public class StressController : Controller
    {

    private Entities db = new Entities();

    //sets on/off variable
    public bool start;

    //GET: Node/StressTest
    //[Authorize]
    public ActionResult StressTest()
    {
        var data = (from item in db.DURR_NODES
                    select item);

        return View(data.ToList());
    }

    //POST: Node/StressTest

    [HttpPost]
    [CustomResultFilter]
    public ActionResult StressTest(List<NODES> nodes, string Command)
    {

        //gets count for loops
        int nodeCount = (from r in db.DURR_NODES
                         select r.NODE).Count();

        //if the start button is pushed-- kicks off the initial update
        //does this because the while loop relies on picking up the REQ_COMPLETE bit, 
        //which is only turned on when updated success flag turned on (REQ_COMPLETE)
        if (Command == "START")
        {
            start = true;

            for (int i = 1; i <= nodeCount; i++)
            {
                NODES Existed_Node = db.NODES.Find(i);
                Existed_Node.NODE = i;
                Existed_Node.X_POSITION = newX(i);
                Existed_Node.Y_POSITION = newY(i);
                Existed_Node.Z_ROTATE = newZ(i);
        //newx,y,z methods just calculate updated values for database 

                Existed_Node.REQUEST_BIT = true;
            }
            db.SaveChanges();
        }
        else
        {
            start = false;
            for (int i = 1; i <= nodeCount; i++)
            {
                NODES Existed_Node = db.ODES.Find(i);
                Existed_Node.REQUEST_BIT = false;
            }
            db.SaveChanges();
        }

        return View();
    }

返回并呈现视图后需要执行的当前ActionFilter代码

    using V1.Controllers;
    using V1.Models;
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web.Mvc;

    namespace OMSV1.ActionFilters
    {
    public class CustomResultFilter : ActionFilterAttribute
    {

    private Entities db = new Entities();


    public override void OnResultExecuted(ResultExecutedContext resultExecutedContext)
    {
        StressController stressCont = new StressController();
        bool start  = stressCont.start;
        int nodeCount = (from r in db.NODES
                            select r.NODE).Count();
    //While start- essentially means until user clicks stop and turns start to false
        while (start)
        {
    //checks for an internal error executing the updates
            bool faultExist = false;

            for (int j = 1; j <= nodeCount; j++)
            {
                string fault = (from r in db.NODES
                                    where r.NODE == j
                                    select r.FAULT).SingleOrDefault();
                int faultCode = Convert.ToInt32(fault);

                if (faultCode != 0)
                {
                    faultExist = true;                       
                }
                if (faultExist)
                    break;
            }
    //if there is no error executing the updates, continue to update records
            if (!faultExist)
            {
                for (int i = 1; i <= nodeCount; i++)
                {
                    bool RequestComplete = (from r in db.NODES
                                            where r.NODE == i
                                            select r.REQ_COMPLETE).SingleOrDefault();
                    string fault = (from r in db.NODES
                                    where r.NODE == i
                                    select r.FAULT).SingleOrDefault();
                    int faultCode = Convert.ToInt32(fault);

                    bool reqBit = (from r in db.NODES
                                   where r.NODE == i
                                   select r.REQUEST_BIT).SingleOrDefault();

        //checks if the request is complete, or if there is no current request or error
        //if not then continue with the update
                    if (RequestComplete || (faultCode == 0 && reqBit == false))
                    {
                        NODES Existed_node = db.NODES.Find(i);
                        Existed_node.NODE = i;
                        Existed_node.X_POSITION = stressCont.newX(i);
                        Existed_node.Y_POSITION = stressCont.newY(i);
                        Existed_node.Z_ROTATE = stressCont.newZ(i);
            //same methods that calculate the update to the database

                        Existed_node.REQUEST_BIT = true;
                        db.SaveChanges();
                    }
                    else
                    {
                        //Pass over
            //do not need an else statement YET. 
                    }
                }
            }
            else
            {
       //is there is an internal error turn start off and stop all updated for all records
                start = false;
                db.Database.ExecuteSqlCommand("UPDATE NODES SET REQUEST_BIT = 0");
            }
            start = stressCont.start;
        }

        if (start == false)
        {
    //if stop button has been clicked and start is now false
    //stop all updates for all records
            db.Database.ExecuteSqlCommand("UPDATE NODES SET REQUEST_BIT = 0");
        }
    }
}

---

}/您是否考虑过这个问题？是否意味着在单击按钮时使用Ajax调用函数，而不是返回一个视图？？是的，我是说，在等待某种外部动作发生时，将自己置身于MVC流水线之外。但我曾考虑过只使用AJAX，但在更改所有代码之前，我想确保没有遗漏任何明显的内容。我对AJAX不太熟悉，所以我希望有另一种方法，但这似乎是我希望在SignalR中找到的最好的解决方案。这在这里可能不合适，也可能不合适，但这是一项非常方便的技术。我建议看一些微软的YouTube视频来演示这一点。这是一种从web服务器调用客户端功能的好方法，因此，当web服务器必须执行一些长时间运行的过程，然后通知客户端时，它非常适合。

    using V1.Controllers;
    using V1.Models;
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web.Mvc;

    namespace OMSV1.ActionFilters
    {
    public class CustomResultFilter : ActionFilterAttribute
    {

    private Entities db = new Entities();


    public override void OnResultExecuted(ResultExecutedContext resultExecutedContext)
    {
        StressController stressCont = new StressController();
        bool start  = stressCont.start;
        int nodeCount = (from r in db.NODES
                            select r.NODE).Count();
    //While start- essentially means until user clicks stop and turns start to false
        while (start)
        {
    //checks for an internal error executing the updates
            bool faultExist = false;

            for (int j = 1; j <= nodeCount; j++)
            {
                string fault = (from r in db.NODES
                                    where r.NODE == j
                                    select r.FAULT).SingleOrDefault();
                int faultCode = Convert.ToInt32(fault);

                if (faultCode != 0)
                {
                    faultExist = true;                       
                }
                if (faultExist)
                    break;
            }
    //if there is no error executing the updates, continue to update records
            if (!faultExist)
            {
                for (int i = 1; i <= nodeCount; i++)
                {
                    bool RequestComplete = (from r in db.NODES
                                            where r.NODE == i
                                            select r.REQ_COMPLETE).SingleOrDefault();
                    string fault = (from r in db.NODES
                                    where r.NODE == i
                                    select r.FAULT).SingleOrDefault();
                    int faultCode = Convert.ToInt32(fault);

                    bool reqBit = (from r in db.NODES
                                   where r.NODE == i
                                   select r.REQUEST_BIT).SingleOrDefault();

        //checks if the request is complete, or if there is no current request or error
        //if not then continue with the update
                    if (RequestComplete || (faultCode == 0 && reqBit == false))
                    {
                        NODES Existed_node = db.NODES.Find(i);
                        Existed_node.NODE = i;
                        Existed_node.X_POSITION = stressCont.newX(i);
                        Existed_node.Y_POSITION = stressCont.newY(i);
                        Existed_node.Z_ROTATE = stressCont.newZ(i);
            //same methods that calculate the update to the database

                        Existed_node.REQUEST_BIT = true;
                        db.SaveChanges();
                    }
                    else
                    {
                        //Pass over
            //do not need an else statement YET. 
                    }
                }
            }
            else
            {
       //is there is an internal error turn start off and stop all updated for all records
                start = false;
                db.Database.ExecuteSqlCommand("UPDATE NODES SET REQUEST_BIT = 0");
            }
            start = stressCont.start;
        }

        if (start == false)
        {
    //if stop button has been clicked and start is now false
    //stop all updates for all records
            db.Database.ExecuteSqlCommand("UPDATE NODES SET REQUEST_BIT = 0");
        }
    }
}