How To Make A For Loop Wait For User Input?

Question

I have a for loop that goes to a site and posts to its forms. For every item in the listbox I want it to wait for the user to fill out the data to the site, then move. The key point here is 'wait'.

So my question is: is it possible to make a for loop to wait for user input?

This is the for loop I am working in order to load the data to the forms:

if (webBrowser1.DocumentText.Contains("Welcome"))
{   
    for (int i = 0; i < listBox4.Items.Count; i++ )
    {

        listBox4.SetSelected(i, true);
        listBox5.SetSelected(i, true);
        //coded to submit to form

        Application.DoEvents();
    }
}

This is the code to click submit on the site:

Application.DoEvents();
foreach (HtmlElement webpageelement in allelements)
{

     if (webpageelement.GetAttribute("value") == "Submit")
     {
         webpageelement.InvokeMember("click");
         Application.DoEvents();

     }

 }

I've also tried making a for loop without the code in it to make it go on. For ex: i++ and make an if statement to make it go on but that lagged my interface.

Answer 1

It is not a good solution to do a for or a while loop to wait for user input. Don't do that. Your program will be constantly working while waiting for the condition to get it out of the loop. Instead, you should find a solution using events or else.

If you don't want to use the Form.ShowDialog() solution proposed in your question comments, you could come up with something like that:

Have a global variable that holds the index of the listBox item we are working on:

int currentItemIndex;

Add a Click event on your Submit button. When the user clicks on Submit, it calls the method that will process the next listBox item:

private void buttonSubmit_Click(Object sender, EventArgs e) {
    // Process next listBox item
    ProcessNextItem();
}

The method that processes the next listBox item:

private void ProcessNextItem() {
    currentItemIndex += 1;
    if (currentItemIndex >= listBox.Items.Count) {
        // We have gone through all listBox items

        // Do nothing
    } else {
        // Fill predefined information to the website
        website.SomeField = listBox.Items[currentItemIndex].SomeField; // Whatever you do to fill predefined information
}

And call a method at the start (the user doesn't click on Submit before the first listBox item is processed):

private void Start() {
    currentItemIndex = -1;
    ProcessNextItem();
}