如何暂停方法执行，并在客户端响应后恢复？

Question

I have a mvc web application in where user send request to server. On execution of method DoSomething(int x) , a validation occurs. So i need to send back a response on the user asking for confirmation. If the user click Yes i should continue the execution of DoSomething(int x). If user response No i will stop for the user to do some changes and resubmit again. I have try to mimic my scenario in the code below: The idea is for you to understand the issue. Now the question: Is there a way to use thread? hint:If this was a windows form it is easy Showdialog will take care of it.

    public void DoSomething(int x)
    {
        // do other thing  here
        //...
        if (x > 0)
        {
            //Notify user for confirmation
            EventNotification.ModalBox("X is out of the Decision", "Do you want to proceed?");
            //httprequest will fire based on user response
            //###PAUSE HERE ####
            //wait for user response
        }

        //###RESUME HERE ####
        //Continu here  if confirmation  is YES
        x = x + 23;
        //save to database
        EventNotification.CloseBox("good");

    }

    public class EventNotification
    {
        public event System.EventHandler CloseEvent;
        public event System.EventHandler ModalBoxEvent;

        public void ModalBox(string text, string YesorNoConfirmation)
        {//raise event to open modal box 
            MyMsgBoxText = text;
            MyMsgBoxTitle = YesorNoConfirmation;
            if (ModalBoxEvent != null)
            {
                ModalBoxEvent(this, System.EventArgs.Empty);
            }
        }
        public void CloseBox(string text)
        {

            if (CloseEvent != null)
            {
                CloseEvent(this, System.EventArgs.Empty);
            }
        }

    }

Answer 1

Short answer: No, this is not possible in MVC.

Longer answer: you need to think a bit differently when working in MVC.

Two approaches come to mind:

1. Display the confirmation dialog on the client-side with JavaScript and go to the server only if the user confirms his/her choice.
2. Create a MVC view that displays the confirmation, and if the user confirms his/her choice, continue. This essentially breaks up your flow into two separate steps.