Request input from user before start few threads

Question

private void Home_Load(object sender,EventArgs e){

//request input by user first
getUserInput()

Thread threadA = new Thread(new ThreadStart(threadAtoRun()));
threadA.Start();

Thread threadB = new Thread(new ThreadStart(threadBtoRun()));
threadB.Start();

Thread threadC = new Thread(new ThreadStart(threadCtoRun()));
threadC.Start();

}

private void getUserInput(){
     //request input from user,user need to select and submit to form ,this input from user use      globally for threadA,threadB and threadC. Only request one times before threadA,threadB and threadC run.
}

private void threadAtoRun(){
     //to do something
}

private void threadBtoRun(){
    //to do something
}

private void threadCtoRun(){
    //to do something
}

In this program,required end user input before run few threads,the input would be used by threadA,threadB and threadC. Only request one times while program executed.

How to make this works?

Answer 1

Launch a modal form to get the user input. Modal form will block execution until user submits/cancels the modal form. When the modal form returns, continue processing by starting the threads.

var form = new GetInputForm();
if (DialogResult.OK == form.ShowDialog()) {
  // continue processing, start threads
}

You can check whether input is already collected before launching the form to ensure user is only asked for the input once.