How to execute next loop after specific time?

In a foreach loop, how to execute the 2nd loop after 5 seconds of 1st loop, and then execute 3rd loop after 3 seconds of the 2nd loop?

1st loop

after 5 second

2nd loop

after 3 second

3rd loop

As I am doing Webbrowser automation in windows form, there are numerous of link to be clicked automatically, after the link is clicked , it will automatically insert a text into a textbox and click on a submit button. The process:

foreach (HtmlElement ahref in ahrefs)
{
    ahref.InvokeMember("click");

    Application.DoEvents();

    txtboxPrice.SetAttribute("value", "100");

    btnSubmit.InvokeMember("click");
 }

The problem of what i facing now is, the loop is too fast until the Webbrowser can't finish implement txtboxprice.setattribute and btnsubmit.invokemember, it already clicked on next loop's ahref.

Therefore, i need to trigger time control in order to make sure txtboxprice.setattribute and btnsubmit.invokemember is implemented before开发者_如何学C proceed to next looping.

using System.Threading;

foreach(..) { } // your for or foreach or any code you want

Thread.Sleep(5000); // pause the current thread on x milliseconds

foreach(..) { }

Thread.Sleep(3000);

foreach(..) { }

Thread.Sleep method blocks the current thread for the specified number of milliseconds.

for (int i = 0; i < 5; i++)
{
        Console.WriteLine("Sleep for 2 seconds.");
        Thread.Sleep(2000);
}

You could do

for(int i=0;i<number_of_times;i++)
{
....
    if(i == number_of_times - 1)
       Thread.Sleep(5000);//time in millsecond, namespace System.Threading
}

for(int i=0;i<number_of_times;i++)
{
....
    if(i == number_of_times - 1)
       Thread.Sleep(3000);
}

for(int i=0;i<number_of_times;i++)
{
....
}

But I wonder why you want to do such a thing.