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Close button c# windows forms

I am trying to close the app by clicking one button but it's not working.
this is my code.
private void buttonclose_Click(object sender, EventArgs e)
{
Application.Exit();
}

Like #Dialecticus said, it could be that you never registered the event handler. In your form designer, when you double click the button it will register the click event for you automatically. If you didn't do that and your code was just copy/pasted you would have to go into the events to "wire" them yourself.
If that's not your issue, you could try using Environment.Exit() or this.Close() instead.

Use this Code, it will diffidently work
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
}

C# - Event when closing WebBrowser

I have a .NET Control with an WebBrowser in it.
This Control is used in my Application in a Form.
So if I close this Form or the whole Application or if I do anything that my WebBrowser is going to be closed I need to fire an event.
Ive tried it like this, but the if function does not works in the way I want it:
private void webBrowser1_VisibleChanged(object sender, EventArgs e)
{
if (!webBrowser1.Visible)
{
MessageBox.Show("Hi");
}
}
Any ideas?
Thanks

this code for after you closed the form....
private void webBrowser1_FormClosed(object sender, FormClosedEventArgs e)
{
MessageBox.Show("WebBrowser Closed");
}
this code for asking permission to do something while closing...
private void frmReader_FormClosing(object sender, FormClosingEventArgs e)
{
MessageBox.Show("Are you sure want to close the WebBrowser?");
}

Only the form knows when it's being closed. A way to accomplish this is to have your control find its containing form using Control.FindForm(), register handlers for the form's closing events (e.g. during initialization), and raise new events from the control.

How to close C# process?

I wrote a simple program using Visual Studio(C#). When I close my program(click at Х) the form is closed, but the process remains. I had to close it from Task Manager.
What is the command to close process?
My code:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
}

e.Cancel = true; means stop the form from closing. That's the main issue with your code.
You should use this parameter if you have a confirmation something like "Are you sure you want to close?" if the user selects "No" you set e.Cancel to true.
Just remove that code (or set Cancel to false) and your form will close, and if that's the last one of your application, it will end.
So the final solution for your problem is a simple
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
}

The e.Cancel=true will prevent your form from closing, so remove it.
if it still doesn't work, try this :
use the Application.Exit() method on the FormClosed event instead of FormClosing:
To do this, go into your form designer window : press maj + F7 or right click on your form in your solution explorer and click on Form designer (something like that)
Right Click on your Form, Select Properties, display the Events, then double-click on the Form Closed event and the designer will automaticaly register the event and generate your code.
You should have something like this without the Application.Exit() method generated :
private void Form1_FormClosed(object sender, FormClosingEventArgs e)
{
Application.Exit();
}

Exit all forms when one close

Hey.
When I say close, I do not speak of the method close(), but when a user hits the close button to the window. I have multiple forms, that show and hide depending on if the user is logged in or about to log in and so on. When the user finaly close one of the forms, I want them all to just exit. Now, when a user closes a form, the program is still running because there is a form in the background hiding.
How can I exit on close, I remember doing this in Java, thanks.

Call the Application.Exit() method.

private void btnExit_Click(object sender, EventArgs e)
{
for (int i = Application.OpenForms.Count - 1; i >= 0; i--)
{
if (Application.OpenForms[i].Name != "Menu")
Application.OpenForms[i].Close();
}
}

Call the Environment.Exit(0); method
private void btnExit_Click(object sender, EventArgs e)
{
Environment.Exit(0);
}

Only call Application.Exit() if you know, that the rest of the application can close ungracefully. If other open forms need to do something in their FormClosing event, this wont get done. Using Application.Exit() is a "bad code smell" meaning that there is something wrong with your design.
Do centralized event handling that all forms subsribe to, so they can be notified when the application is closing. There are also plenty of other ways to handle this, Teh Googles knows :)

I tried solve same problem and this is working fine:
private void Form2_FormClosed(object sender, FormClosedEventArgs e)
{
Application.Exit();
}

How to Disable Alt + F4 closing form?

What is the best way to disable Alt + F4 in a c# win form to prevent the user from closing the form?
I am using a form as a popup dialog to display a progress bar and I do not want the user to be able to close it.

This does the job:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
}
Edit: In response to pix0rs concern - yes you are correct that you will not be able to programatically close the app. However, you can simply remove the event handler for the form_closing event before closing the form:
this.FormClosing -= new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
this.Close();

If you look at the value of FormClosingEventArgs e.CloseReason, it will tell you why the form is being closed. You can then decide what to do, the possible values are:
Member name - Description
None - The cause of the closure was not defined or could not be determined.
WindowsShutDown - The operating system is closing all applications before shutting down.
MdiFormClosing - The parent form of this multiple document interface (MDI) form is closing.
UserClosing - The user is closing the form through the user interface (UI), for example by clicking the Close button on the form window, selecting Close from the window's control menu, or pressing ALT+F4.
TaskManagerClosing - The Microsoft Windows Task Manager is closing the application.
FormOwnerClosing - The owner form is closing.
ApplicationExitCall - The Exit method of the Application class was invoked.

I believe this is the right way to do it:
protected override void OnFormClosing(FormClosingEventArgs e)
{
switch (e.CloseReason)
{
case CloseReason.UserClosing:
e.Cancel = true;
break;
}
base.OnFormClosing(e);
}

Note that it is considered bad form for an application to completely prevent itself from closing. You should check the event arguments for the Closing event to determine how and why your application was asked to close. If it is because of a Windows shutdown, you should not prevent the close from happening.

You could handle the FormClosing event and set FormClosingEventArgs.Cancel to true.

I am using a form as a popup dialog to display a progress bar and I do not want the user to be able to close it.
If the user is determined to close your app (and knowledgeable) enough to press alt+f4, they'll most likely also be knowledgeable enough to run task manager and kill your application instead.
At least with alt+f4 your app can do a graceful shutdown, rather than just making people kill it. From experience, people killing your app means corrupt config files, broken databases, half-finished tasks that you can't resume, and many other painful things.
At least prompt them with 'are you sure' rather than flat out preventing it.

This is a hack to disable Alt + F4.
private void test_FormClosing(object sender, FormClosingEventArgs e)
{
if (this.ModifierKeys == Keys.Alt || this.ModifierKeys == Keys.F4)
{
e.Cancel = true;
}
}

Subscribe FormClosing event
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = e.CloseReason == CloseReason.UserClosing;
}
Only one line in the method body.

This does the job:
bool myButtonWasClicked = false;
private void Exit_Click(object sender, EventArgs e)
{
myButtonWasClicked = true;
Application.Exit();
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (myButtonWasClicked)
{
e.Cancel = false;
}
else
{
e.Cancel = true;
}
}

Would FormClosing be called even when you're programatically closing the window? If so, you'd probably want to add some code to allow the form to be closed when you're finished with it (instead of always canceling the operation)

Hide close button on form by using the following in constructor of the form:
this.ControlBox = false;