How to hide a form on initialization

[aewarnick]

Have a problem.

private void UserShutdown(object sender, SessionEndingEventArgs e)
{
MessageBox.Show("exit");
	Application.Exit();
}
//-------------------------------
private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
	e.Cancel=true;
	this.Visible=false;
MessageBox.Show("closed");
}

Here is what happens in the background (I beleive). The user attempts to restart the computer. First the Form1_Closing ev is called. It cancels the close event, making windows stop shutting down. Because of that, the UserShutdown ev is not called at all.

How can I tell from the Closing ev that the user is trying to shut down? Is there a way I can wait on that event? Or maybe there is another way? What do you think?

 

[Divil]

Hmm, thats weird. If the Closing event is fired before the Shutdown event, I dont know what to tell you.

Come to think of it, try checking Environment.HasShutdownStarted in your Closing event, perhaps thatll do it.

 

[aewarnick]

The command HasShutdownStarted must be VB because it is not there. Nevermind, it is not static. I think that is why it was not in the list. I will try it.

 

[aewarnick]

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
Environment E=new Environment();
MessageBox.Show( "closed "+E.HasShutdownStarted );
e.Cancel=true;
this.Visible=false;
}

I get this error:
D:\My Documents\C Sharp projects\WallPaperRotator\Form1.cs(873): System.Environment.Environment() is inaccessible due to its protection level

 

[Divil]

HasShutdownStarted is static.

Use System.Environment.HasShutdownStarted.

 

[aewarnick]

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
MessageBox.Show("closed "+System.Environment.HasShutdownStarted);
e.Cancel=true;
this.Visible=false;
}

D:\My Documents\C Sharp projects\WallPaperRotator\Form1.cs(873): An object reference is required for the nonstatic field, method, or property System.Environment.HasShutdownStarted

 

[Divil]

Weird, I guess they made it static in .NET 1.1. Since that class cannot be instantiated in .NET 1.0 I dont know what to suggest.

 

[aewarnick]

can I download .net 1.1?

 

[Nerseus]

Ive only read the last half of this thread, but I hope this helps

The following link shows a way to see whats closing your form (code, the X, windows shutting down). It relies on what I think is a hack, but has been consistent on every machine Ive tried. Just a suggestion if nothing else works:
http://www.codeproject.com/useritems/FormClosing.asp

-Nerseus

 

[aewarnick]

I am downloading 1.1 but I will try both and post back.

 

[aewarnick]

Ok, here is the scoop: the stack trace method does not work every time on my computer. Sometimes when I test it, the same message is produced (userclose) I think it is. The same message for the user trying to close the for as the computer shutting down.

I just installed 1.1 but not visual studio wont load. I uninsalled the old framework and that is probably why. Did I need to keep that? The Environment.HasShutdownStarted method would not compile with the old and new framework in place. Now I cant even test to see if it works now with just 1.1.

Vs says it cannot load the compiler now. How can I fix this? It says to reinstall Vs but I think it will put the old framework on there.

 

[Divil]

You should have both frameworks installed. Large amounts of Visual Studio 2002 are written with version 1.0 of the framework and it needs it installed.

 

[aewarnick]

How do I tell it to use the new framework so that Environment.HasShutdownStarted works. I tried downloading and installing SDK 1.1 but that did not seem to help.

 

[Divil]

You cant. If you want a development environment to compile code for .NET 1.1 you need Visual Studio .NET 2003.

 

[aewarnick]

I can just get an upgrade for the standard version for 30 bucks right?

 

[aewarnick]

This is my last option (I guess) before I buy VS2003 for 30 (if it is 30)

Can I make this work in some way?

System.Environment E=new System.Environment();
if(E.HasShutdownStarted)

I always get the error:
D:\My Documents\C Sharp projects\WallPaperRotator\Form1.cs(1022): System.Environment.Environment() is inaccessible due to its protection level

Why would it be there if I cant use it?

 

[Divil]

I honestly have no idea. I can only imagine its a bug, thats why its fixed in version 1.1. You might be able to instantiate the class under 1.0 via reflection.

 

[aewarnick]

I had to change the code some to get it to work correctly. Does this look right?

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
	try{
		StackTrace Trace = new StackTrace(7);
		StackFrame Frame = Trace.GetFrame(7);
		string s= Frame.GetMethod().Name;
			if(s=="WndProc")
                                	{
				Application.Exit();
			}
			else
			{
				e.Cancel=true;
				this.Visible=false;
			}
	}
	catch{}

}
No need to respond if it looks ok.

 

[Eran]

Is it only for Windows Application or also for Console Application?

 

[aewarnick]

Probably. Try it out and see.