Re: Login Screen - C# Discussion Boards

The semaphore timeout period has expired.

13-Dec-12 21:49

The MSDN text is pretty clear - you feed it the name of the executable file, and it returns al the processes that are currently running from that file:

Process[] procs = Process.GetProcessesByName("chrome");

Will give you a list of all the processes
running the Chrome browser.

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

C-P-User-313-Dec-12 8:01

C-P-User-3

13-Dec-12 8:01

What are the most likely culprits to this error ?

The semaphore timeout period has expired.

The port in question is a simple BlueTooth USB plug-in thing, which Win'7 sees properly and everything.

This is a "sometimes" error. It is not consistent, and I have not found it documented on MSDN or other sites.

This is the dozen line method I'm using...

public static void Open_ActivePortWeWillUse(String Drone_StringNameFromUser)
    {
        SerialPort TempSerialPort = new SerialPort(Drone_StringNameFromUser, (int) SerialPortSpeed);

        ThePorts.ActivePort1 = TempSerialPort;

        ThePorts.ActivePort1.DataBits = 8;
        ThePorts.ActivePort1.Parity = Parity.None;
        ThePorts.ActivePort1.StopBits = StopBits.One;

        ThePorts.ActivePort1.DataReceived += new SerialDataReceivedEventHandler(OurBackGroundSerialPortReceiver);

        ThePorts.ActivePort1.Open();  // The "Sometimes" Error occurs here
    }

modified 22-Dec-12 22:07pm.

TextChat works fine and users are added to the list but VoiceChat doesn't work

sagarDuwal13-Dec-12 7:47

sagarDuwal

13-Dec-12 7:47

I tried the same sample in VS2012 and the code works but the problem is VoiceChat doesnt work proper. Voice conference ports are not open thus the list of clients for voice conference are not added. No voice conference???? Frown | :(

Thread: Voice and Text Conferencing Library[^]

Re: TextChat works fine and users are added to the list but VoiceChat doesn't work

OriginalGriff13-Dec-12 8:15

13-Dec-12 8:15

Don't post this here - if you got the code from an article, then there is a "new message" button at the bottom of that article, which causes an email to be sent to the author. They are then alerted that you wish to speak to them.
Posting this here relies on them "dropping by" and realising it is for them.

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

txmatt13-Dec-12 5:15

txmatt

13-Dec-12 5:15

I have added a login in screen to my program which works great except if the user just closes the login window it bypasses the the screen and loads the program. Is there a way to prevent this? Here is a sample of the code:

public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();
        }

        private void Button2_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            if ((textBox1.Text == "puppy") && (textBox2.Text == "password"))
            {
                MessageBox.Show("Welcome Puppy", "Success",
                MessageBoxButtons.OK, MessageBoxIcon.Information);

                this.Dispose();
            }

            else
            {
                MessageBox.Show("Wrong username or password","Invalid Input",
                    MessageBoxButtons.OK,MessageBoxIcon.Error);
            }

OriginalGriff13-Dec-12 5:21

13-Dec-12 5:21

Easiest way is to have a LoggedIn property in your form. Default it to false, then set it to true when he logs in correctly.
When you get back to the main form, check it, and behave appropriately.

BTW: Don't Dispose your form from inside - use Close instead. You can't dispose it until you have finished and the there is still and instance reference in the main form!

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

XsenseX13-Dec-12 5:28

XsenseX

13-Dec-12 5:28

There are many ways to protect this.
However if you want to go for simplicity you can use a global bool for this.

Example:

public bool LoginStatus;

Then an example of usage:
!LoginStatus means basically if false.
LoginStatus means true.

So you set this bool in your login part to true if login is ok.

By using:

LoginStatus = true;

public void YourLogin()
{
   if(!LoginStatus)
   {
     //User is not logged in use a return;
     //Or whatever you wish to do with it.
   }
   else
   {
     //User is logged in continue doing your things.
   }
}

As said above this is a very simple way to do it.
There are lots ways more to do this.

OriginalGriff13-Dec-12 5:42

13-Dec-12 5:42

Never recommend public fields - always use properties. Remember that a lot of the questions (like this one) are from complete beginners, and it is best to get good habits ingrained as early as possible! Laugh | :laugh:

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

Matt U.13-Dec-12 7:00

Matt U.

13-Dec-12 7:00

The way I've always done this is by using a DialogResult from the login form. In the login form's "Button1_Click" event handler, where you have verified that the login info is correct, instead of "this.Close();" use "this.DialogResult = DialogResult.OK;" And then to use it, go to the Program.cs file. In the Main method, remove "Application.Run(new MainForm());" and replace it with:

LoginForm login = new LoginForm();
if (login.ShowDialog() == DialogResult.OK)
{
    Application.Run(new MainForm());
}

That is, unless you want the user to "log out" and see the login screen again. But in this case, if you don't need that functionality, this will show the main form ONLY if the dialog result is "OK". It eliminates the need for a property (global or otherwise). Do you see what I'm doing here or do you need more explanation?

djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.

Is there an issue with this script?

txmatt13-Dec-12 7:04

txmatt

13-Dec-12 7:04

This worked perfectly, thank you.

Vasudevan Deepak Kumar13-Dec-12 4:38

Vasudevan Deepak Kumar

13-Dec-12 4:38

I am trying to do a preliminary evaluation of Parallel Tasking in C#. I ran this script on my local. Each time the count of files seems to be different.

http://msdn.microsoft.com/en-us/library/system.io.directory.getfiles(v=vs.71).aspx[^]

A few outputs are:

Processed 14062 files in 715 milleseconds
Processed 14092 files in 710 milleseconds
Processed 14080 files in 695 milleseconds
Processed 13908 files in 712 milleseconds

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep!

Re: Is there an issue with this script?

OriginalGriff13-Dec-12 5:00

Re: Is there an issue with this script?

13-Dec-12 5:00

I think you link points in teh wrong direction - it goes to a simple description of Directory.GetFiles with trivial examples (.NET 1.1) or the leader page for the various overloads (.NET 4.0) - neither of them should find anything like 14K files in the root directory of your boot drive (or someone really needs to learn about hierarchical data storage)

Nothing I can see relates in any way to parallelism - so post your actual code fragment that generates the result you show!

If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.

Vasudevan Deepak Kumar13-Dec-12 6:17

Vasudevan Deepak Kumar

13-Dec-12 6:17

Sorry. The correct URL is

http://msdn.microsoft.com/en-us/library/ff477033.aspx[^]

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep!

Re: Is there an issue with this script?

Eddy Vluggen13-Dec-12 6:43

Eddy Vluggen

13-Dec-12 6:43

Vasudevan Deepak Kumar wrote:
Is there an issue with this script?

That would be unlikely. More likely is that the app hits an exception, and with the tasks executing in parallel, it'd abort after a number of times.

Try a different path; in the Program Files folder there'll be paths that you don't have access to, files that are locked and more.

--edit
The results of my three consecutive runs;

Processed 11714 files in 106908 milleseconds
Processed 11718 files in 105843 milleseconds
Processed 11714 files in 103945 milleseconds

If you want to know "what" files were added/removed in the meantime, then simply write the filenames you encounter to a text-file. Use a tool like "WinDiff" to visualize the differences between those text-files.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
They hate us for our freedom![^]

modified 13-Dec-12 12:55pm.

страна говна

WebMaster12-Dec-12 22:00

WebMaster

12-Dec-12 22:00

как програмист не умер когда над ним эксперементы ставят, вот и живи как хочешь в этой стране

Pete O'Hanlon12-Dec-12 22:41

Pete O'Hanlon

12-Dec-12 22:41

I'm sorry, but could you please ask questions in English? This is predominately an English language site and we can't help you if we don't understand you. When I ran this sentence through Google, it translated it to

"as a programmer is not dead when put on him experimenting, and that's how you want to live in this country"

That's no help to me in working out what you are after.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

Killzone DeathMan12-Dec-12 23:30

Killzone DeathMan

12-Dec-12 23:30

Some people are shy to do a question :P

Richard MacCutchan13-Dec-12 2:50

Richard MacCutchan

13-Dec-12 2:50

This is the same person as in the question below, and he is ranting against the answer to that question. Reported as abuse.

One of these days I'm going to think of a really clever signature.

Keith Barrow13-Dec-12 0:40

Keith Barrow

13-Dec-12 0:40

Google Translation:
"as a programmer is not dead when put on him experimenting, and that's how you want to live in this country"

In Soviet Russia, the questions answer you!

[Edit]
Please use English, it's in the site rules (except in the Indian and Chinese forums).

Sort of a cross between Lawrence of Arabia and Dilbert.[^]
-Or-
A Dead ringer for Kate Winslett[^]