Strange behaviour ...

[Jacek Jurkowski]

My code:

public class aaa
{
public void ShowWelcomeWindow()
{
Form welcome = new Form();
try
{
welcome.ShowDialog();
}
catch(ThreadAbortException)
{
// No exception ...
}
finally
{
welcome.Dispose();
}
}
}

Now:

aaa a = new aaa();
ThreadStart tH = new ThreadStart(a.ShowWelcomeWindow);
Thread t = new Thread(tH);
t.Start();

while(t.ThreadState != ThreadStates.Running)
{
Thread.Sleep(100);
}

t.Abort();
t.Join();

Why after running this code window showed by aaa class
some times releases immediately and some times it waits for
user action such a mouse move before releases?

[Dmitriy Lapshin [C# / .NET MVP]]

Hi Jacek,

I should say your approach is wrong by design. All UI should be handled
within a single thread, and you should only delegate non-UI tasks to
additional threads.

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://x-unity.miik.com.ua/teststudio.aspx
Bring the power of unit testing to VS .NET IDE

"Jacek Jurkowski" <jj********@op.pl> wrote in message
news:%2****************@TK2MSFTNGP12.phx.gbl...

My code:

public class aaa
{
public void ShowWelcomeWindow()
{
Form welcome = new Form();
try
{
welcome.ShowDialog();
}
catch(ThreadAbortException)
{
// No exception ...
}
finally
{
welcome.Dispose();
}
}
}

Now:

aaa a = new aaa();
ThreadStart tH = new ThreadStart(a.ShowWelcomeWindow);
Thread t = new Thread(tH);
t.Start();

while(t.ThreadState != ThreadStates.Running)
{
Thread.Sleep(100);
}

t.Abort();
t.Join();

Why after running this code window showed by aaa class
some times releases immediately and some times it waits for
user action such a mouse move before releases?

[Jacek Jurkowski]

I really need that in 3 situations.
1) Process viewer for my application must work on separate thread.
2) Windows service having NotyficationIcon. Notyfication Icon doesn't
work just added to service component - it must be run on a separate
modal window what practically means a start of a new thread because
other case ShowDialog of that form prevents service from starting.
3) Welcome window displaying what's happening.

I Solved problem making static event and method that releases window
from itself where main thread requests it.

I should say your approach is wrong by design. All UI should be handled
within a single thread, and you should only delegate non-UI tasks to
additional threads.