how to press button by program not by mouse

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i need to know how can i press the button1 by the program i mean inside the program (Programitically) not by pointing the mouse on that button then pressing the left mouse button
look at my program

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace keyPressed
{
    public partial class Form1 : Form
    {
        string str = "hellow";
        public Form1()
        {
            InitializeComponent();
            pp();
        }

        private void pp()
        {
            //I need to call button1_Click from here  
            //without using the mouse ,how could i do that ?
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(str);
        }
    }
}

Posted 5-Feb-11 22:10pm

Khalid Sabtan

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2 solutions

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OriginalGriff · Accepted Answer · 2011-02-05T22:41:00

Solution 2

Use the Button.PerformClick() method

C#

private void button1_Click(object sender, EventArgs e)
    {
    button2.PerformClick();
    }

private void button2_Click(object sender, EventArgs e)
    {
    MessageBox.Show("Hello");
    }

[edit]Added example - OriginalGriff[/edit]

Posted 5-Feb-11 22:41pm

OriginalGriff

Updated 5-Feb-11 22:42pm

v2

Comments

Espen Harlinn 6-Feb-11 5:10am

Nice and simple - just PerformClick :)

#realJSOP 6-Feb-11 6:05am

Proposed as answer.

Olivier Levrey 6-Feb-11 8:48am

My 5. I agree. PerformClick is cleaner than directly calling the event handler.

fjdiewornncalwe 6-Feb-11 11:09am

That's why PerformClick is there... +5.

Espen Harlinn · Accepted Answer · 2011-02-05T22:39:00

Solution 1

You can call the event handling method, button1_Click, directly:

private void pp()        
{            
//I need to call button1_Click from here              
//without using the mouse ,how could i do that ? 

button1_Click(this, new EventArgs());

}

If you want to simulate a button click you can send a WM_LBUTTONDOWN[^] to the button control.

Regards
Espen Harlinn

Posted 5-Feb-11 22:39pm

Espen Harlinn

Comments

OriginalGriff 6-Feb-11 4:44am

That only actions the single method you specify, rather than any methods which are assigned as handlers to the click event. You also don't need to start throwing windows messages around directly: you can use the Button.PerformClick method instead.

Olivier Levrey 6-Feb-11 8:48am

I agree. PerformClick is cleaner than directly calling the event handler.

fjdiewornncalwe 6-Feb-11 11:09am

Between your answer and Griff's I have done both in the past. Both work, but if memory serves me correctly, Griff's is the more accepted method of doing this. +5 for showing that this can be done this way too.

Espen Harlinn 6-Feb-11 11:20am

Thanks Marcus! as you see, I voted 5 for OriginalGriffs answer too :)