Question

After a button is clicked in a Windows form application written in C#, how to wait for another button to be clicked? Meanwhile I am updating a datagridview dynamically by current information.

EDIT

After button1 is clicked, I want to repeatedly update a dataGridView with current information and when button2 is clicked I want to stop updating the dataGridView.

Answer 1

Use Timer Class.

public partial class Form1 : Form
{
    System.Windows.Forms.Timer timer;

    public Form1()
    {
        InitializeComponent();

        //create it
        timer = new Timer(); 
        // set the interval, so it'll fire every 1 sec. (1000 ms)
        timer.Interval = 1000; 
        // bind an event handler
        timer.Tick += new EventHandler(timer_Tick); 

        //...
    }

    void timer_Tick(object sender, EventArgs e)
    {
        //do what you need
    }

    private void button1_Click(object sender, EventArgs e)
    {
        timer.Start(); //start the timer
        // switch buttons
        button1.Enabled = false;
        button2.Enabled = true;        
    }

    private void button2_Click(object sender, EventArgs e)
    {
        timer.Stop(); //stop the timer
        // switch buttons back
        button1.Enabled = true;
        button2.Enabled = false;
    }

From MSDN:

A Timer is used to raise an event at user-defined intervals. This
Windows timer is designed for a single-threaded environment where UI
threads are used to perform processing. It requires that the user code
have a UI message pump available and always operate from the same
thread, or marshal the call onto another thread.

When you use this timer, use the Tick event to perform a polling
operation or to display a splash screen for a specified period of
time. Whenever the Enabled property is set to true and the Interval
property is greater than zero, the Tick event is raised at intervals
based on the Interval property setting.