How to bring a Windows Form on top?

Question

I am developing a windows form application in C#. This application shows some text on the Form when a special kind of external event occurs (For example suppose that I want to write "Mouse is on upper line" on form when in the mouse's position y=0). I need to bring the Form to top of every other window when the event occurs.

I've edited your question to try to make it more clearer but it still is unclear, what do you mean "mouse's position y=0" — Sayse, Aug 13 '15 at 06:45
you have to use mdiparent and mdichild to different classes and show them in front , activate or whatever. — Sakthivel, Aug 13 '15 at 06:49
@Sayse: It is not important at all. I just wanted to bring an example of an event. — Ahmad Sadigh, Aug 13 '15 at 06:55

score 5 · Accepted Answer · edited Aug 13 '15 at 07:07

5

Use this in you form class:

public void BringToTop()
{
    //Checks if the method is called from UI thread or not
    if (this.InvokeRequired)
    {
        this.Invoke(new Action(BringToTop));
    }
    else
    {
        if (this.WindowState == FormWindowState.Minimized)
        {
            this.WindowState = FormWindowState.Normal;
        }
        //Keeps the current topmost status of form
        bool top = TopMost;
        //Brings the form to top
        TopMost = true;
        //Set form's topmost status back to whatever it was
        TopMost = top;
    }
}

edited Aug 13 '15 at 07:07

Ahmad Sadigh

63
1
7

answered Aug 13 '15 at 06:46

John Steven

68
5

I tested it and it really works. Thank you. – Ahmad Sadigh Aug 13 '15 at 07:01
1

I got help from another person and know I am just passing it to you. – John Steven Oct 06 '15 at 09:34

score 2 · Answer 2 · answered Aug 13 '15 at 06:50

2

According to this source you can simply do form.Activate();

P.S. You may find this information useful too.

answered Aug 13 '15 at 06:50

Fabjan

13,506
4
25
52

Smudoo · Answer 3 · 2015-08-13T06:45:22.613

0

Try to use this

yourForm.TopMost = true;

edited Aug 13 '15 at 06:45

answered Aug 13 '15 at 06:44

Smudoo

562
3
11

How would you set it true from an external event? – Sayse Aug 13 '15 at 06:44
1

It won't work if the window is minimized. – cyberj0g Aug 13 '15 at 06:47
1

It gives me run-time error. From exceptions message, I think I can not change the value from another thread. – Ahmad Sadigh Aug 13 '15 at 06:57

How to bring a Windows Form on top?

3 Answers3