Maximize and not hide taskbar - C# Discussion Boards

mrithula814-Mar-09 22:06

14-Mar-09 22:06

Hi,
I used multithreading concept so the client is able to communicate with any number of servers.Using the same concept i tried to call the 2nd server after 10 secs.When it comes to the client the 2nd time it gives"Invalid OperationException Cross-thread operation not valid: Control 'listBox6' accessed from a thread other than the thread it was created on."
//server

 public UdpServer()
        {
            try
            {
                Thread startServer = new Thread(new ThreadStart(start_server));
                startServer.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
                    // onReceive.Start();

            try
            {
                Thread.Sleep(10000);
  startServer2 = new Thread(new hreadStart(start_server2));
               
                startServer2.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }

        }
public static void start_server()
        {
               
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10001);

                Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                newsock.Bind(ipep);
                Console.WriteLine("Waiting for a client...");

                while (true)
                {
                    try
                    {
                        //IPEndPoint sender = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8050);
                        EndPoint tmpRemote = (EndPoint)ipep;
                        // EndPoint tmpRemote = (sender);

                        byte[] data = new byte[1024];
                        Console.WriteLine("hai");

                        int recv = newsock.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote);
                        Console.WriteLine("gfgjfk");


                        Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
                        Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));//hello is received  

                        data = new byte[1024];
                        string ss = "Welcome to the Server";
                        data = Encoding.ASCII.GetBytes(ss);
                        newsock.SendTo(data, 0, data.Length, SocketFlags.None, tmpRemote);


                        Console.WriteLine("\nSent Acknowledgement");

                    }
                    catch (SocketException e)
                    {
                        Console.WriteLine(e.Message);
                    }


                    //start_server();
                    //startServer.Start();
                   
                }        

        }

        public static void start_server2()
        {

         
            IPEndPoint ipep1 = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10002);

            Socket newsock1 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            newsock1.Bind(ipep1);
            Console.WriteLine("Waiting for a client2...");

            while (true)
            {
                try
                {
                     EndPoint tmpRemote1 = (EndPoint)ipep1;
                    byte[] data = new byte[1024];
                    Console.WriteLine("hai");

                    int recv = newsock1.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote1);
                    Console.WriteLine("gfgjfk");
                    Console.WriteLine("Message received from {0}:", tmpRemote1.ToString());
                    Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));//hello is received  

                    data = new byte[1024];
                    string ss = "Welcome to the Server";
                    data = Encoding.ASCII.GetBytes(ss);
                    newsock1.SendTo(data, 0, data.Length, SocketFlags.None, tmpRemote1);


                    Console.WriteLine("\nSent Acknowledgement");

                }
                catch (SocketException e)
                {
                    Console.WriteLine(e.Message);
                }              
            }

        }

//client

private void SendMessage()
        {
           
            try
            {
               
                listBox6.Items.Add("Connecting....");
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10001);
                //IPEndPoint ipep = new IPEndPoint();
                Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, 1);
              listBox6.Items.Add("Connected");

                byte[] data = new byte[1024];
                String snd = "hello";
                data = Encoding.ASCII.GetBytes(snd);
                listBox6.Items.Add("Transmitting...");
                sock.SendTo(data, 0,data.Length, SocketFlags.None, ipep);//sent hello                
               
                listBox6.Items.Add("Sent...");

                //IPEndPoint sender = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8050);
                EndPoint tmpRemote = (EndPoint)ipep;

                listBox6.Items.Add("Message received from {0}:");
                listBox6.Items.Add(ipep.ToString());

                data = new byte[1024];
                int recv = sock.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote);

                String zz=Encoding.ASCII.GetString(data, 0, recv);
                listBox6.Items.Add(zz);
                if (zz == "Welcome to the Server")
                {
                    lb9.Text = "Active";
                    lb9.BackColor = Color.Green;
                }
                else{
                    lb9.Text = "Inactive";
                    lb9.BackColor=Color.Red;
                }            
            }

            catch (SocketException e)
            {
                //Console.WriteLine("Error..... " + e.StackTrace);
                MessageBox.Show(e.Message);

            }
           
        }
private void SendMessage1()
        {
           
            try
            {
               
                listBox6.Items.Add("Connecting....");
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10002);
//same as above
}}

I am calling the SendMessage1 in a timer event

[code] private void tim_Elapsed(object sender,ElapsedEventArgs e)
{
SendMessage1();
}
Please help me with this

modified on Sunday, March 15, 2009 4:13 AM

Re: Sockets in C#

mrithula817-Mar-09 1:07

mrithula8

17-Mar-09 1:07

Hi The following code gives me the output:
Waiting for client...
hai
Waiting for client2.....
hai
Message received from...
hello
Sent ackn....

hai
Message received from...
server
Sent ackn....
I want it to be like:
Waiting for client...
hai
Message received from...
hello
Sent ackn....
Waiting for client 2...
I tried to change but im getting"the existing connection was forcibly closed by the remote host"..Please help me with this
//client

public void SendMessage()
       {

           try
           {

               listBox6.Items.Add("Connecting....");
               IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10001);
               //IPEndPoint ipep = new IPEndPoint();
               Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
               sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, 1);
               //sock.Bind(ipep);
               listBox6.Items.Add("Connected");
               byte[] data = new byte[1024];
               String snd = "hello";
               data = Encoding.ASCII.GetBytes(snd);
               listBox6.Items.Add("Transmitting...");
               sock.SendTo(data, 0,data.Length, SocketFlags.None, ipep);//sent hello
               //sock.SendTo(data, ipep);//sent hello

               listBox6.Items.Add("Sent...");
               EndPoint tmpRemote = (EndPoint)ipep;
               listBox6.Items.Add("Message received from {0}:");
               listBox6.Items.Add(ipep.ToString());
               data = new byte[1024];
               int recv = sock.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote);
               String zz=Encoding.ASCII.GetString(data, 0, recv);
               listBox6.Items.Add(zz);
               if (zz == "Welcome to the Server")
               {
                   lb9.Text = "Active";
                   lb9.BackColor = Color.Green;
               }
               else{
                   lb9.Text = "Inactive";
                   lb9.BackColor=Color.Red;
               }
           }

           catch (SocketException e)
           {
               //Console.WriteLine("Error..... " + e.StackTrace);
               MessageBox.Show(e.Message);

           }
           //SendMessage1();
       }

       public void SendMessage1()
       {
       //same as above
            }

//server

public UdpServer()
        {
            try
            {
                startServer = new Thread(new ThreadStart(start_server));
                startServer.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                startServer.Abort();
            }

           // Thread.Sleep(15000);
            try
            {
                //Thread.Sleep(10000);
                startServer2 = new Thread(new ThreadStart(start_server2));
               
                startServer2.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                startServer2.Abort();
            }
        }

 public static void start_server()
        {
                   
                IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 10001);
                Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                newsock.Bind(ipep);
                Console.WriteLine("Waiting for a client...");
                while (true)
                {
                    try
                    {
                        //IPEndPoint sender = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8050);
                        EndPoint tmpRemote = (EndPoint)ipep;
                     byte[] data = new byte[1024];
                        Console.WriteLine("hai");
                        int recv = newsock.ReceiveFrom(data, 0, data.Length, SocketFlags.None, ref tmpRemote);
                        Console.WriteLine("gfgjfk");
                        Console.WriteLine("Message received from {0}:", tmpRemote.ToString());
                        Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));//hello is received  
                        data = new byte[1024];
                        string ss = "Welcome to the Server";
                        data = Encoding.ASCII.GetBytes(ss);
                        newsock.SendTo(data, 0, data.Length, SocketFlags.None, tmpRemote);
                        Console.WriteLine("\nSent Acknowledgement");                    }
                    catch (SocketException e)
                    {
                        Console.WriteLine(e.Message);
                    }                    
                }        
        }
   public static void start_server2()
        {
          //same as above
}

Re: Sockets in C#

mrithula817-Mar-09 4:04

mrithula8

17-Mar-09 4:04

Hi I used the Thread.Sleep()

public UdpServer()
        {
            try
            {
                startServer = new Thread(new ThreadStart(start_server));
                startServer.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                //startServer.Abort();
            }

           try
            {
                Thread.Sleep(20000);
               
                startServer2 = new Thread(new ThreadStart(start_server2));
               
                startServer2.Start();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                //startServer2.Abort();
            }

        }

Im getting the output as
Waiting for client...
hai
Message received....
hello
Sent ack

Waiting for client2...
hai

At this it shows"existing connection was forcibly closed by the remote host".Please give me your suggestion

How to align the control in the centre.

Pankaj Nikam14-Mar-09 4:21

Pankaj Nikam

14-Mar-09 4:21

I have made some user controls. I will be using them in another application in C# where these will be added on the form dynamically at the click of a button. The sizes of the user controls differ from one another.
The problem is that when I add them dynamically it aligns itself at the top left corner. I want it to automatically align itself to centre of the main form and when I resize the form, it should realign itself.
I have tried setting its dock property to fill but it doesn't help at all.

Always Keep Smiling.
Yours Pankaj Nikam

Re: How to align the control in the centre.

Xmen Real 14-Mar-09 5:51

Xmen Real

14-Mar-09 5:51

use Resize event of form and put all controls in a panel then update its location. eg

panel.Location = new Point(this.Width/2 - panel.Width/2, this.Height/2-panel.Height/2);

TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87֦ʻ6ϣN8ȤBcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

Re: How to align the control in the centre.

Pankaj Nikam14-Mar-09 7:52

Pankaj Nikam

14-Mar-09 7:52

Thank you so much. Smile | :)

Always Keep Smiling.
Yours Pankaj Nikam

Re: How to align the control in the centre.

Luis Alonso Ramos14-Mar-09 9:47

Luis Alonso Ramos

14-Mar-09 9:47

Put everything into a panel, and set that panel's Anchor property to none.

Luis Alonso Ramos
Intelectix
Chihuahua, Mexico

My Blog!

Maximize and not hide taskbar

David Muir14-Mar-09 3:35

David Muir

14-Mar-09 3:35

Hey all,

I am currently in the middle of writing a custom windows form. (.Net 2.0).

I have removed the default border from the form, changed this to a Sizable Border and also set the text of the form to blank so to remove the window caption box.

I have now added a custom close, minimize, and maximize button to my form. All works well except for the maximize. On clicking this button, i do wish the form to maximize, which it does, however; it also maxmizes over the top of the task bar. How would i go about stopping this, and letting us view the task bar at all times?

I could set the size on the window, however; that would still show the resize borders on the form, which i want to be hidden on maximized state.

Help would be greatly appreciated.

Thanks

TF

Re: Maximize and not hide taskbar

PIEBALDconsult14-Mar-09 4:18

PIEBALDconsult

14-Mar-09 4:18

If this.WindowState = System.Windows.Forms.FormWindowState.Maximized doesn't work for you then you're working too hard.

Re: Maximize and not hide taskbar

David Muir14-Mar-09 4:25

David Muir

14-Mar-09 4:25

It works to a certain extent... It maximizes the window, however; it also maximizes over the top of the task bar Frown | :(

Re: Maximize and not hide taskbar

PIEBALDconsult14-Mar-09 4:51

PIEBALDconsult

14-Mar-09 4:51

Works fine for me, doesn't cover the task bar.

Re: Maximize and not hide taskbar

Luc Pattyn14-Mar-09 4:59

Luc Pattyn

14-Mar-09 4:59

Yeah, I have seen some anomalies over the years, and never figured out all the details; some of these are factors in the end result:
- Windows version
- taskbar location (mine is typically at the left)
- taskbar mode (auto-hide, never hide; I prefer never hide assuming monitor sufficiently large)
- the order in which Windows properties get set

And for some applications, one wants to cover the task bar whatever the system settings are (e.g. a slide show)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets

Re: Maximize and not hide taskbar

Luc Pattyn14-Mar-09 4:24

Luc Pattyn

14-Mar-09 4:24

Hi,

with a standard Form, when you look at Form.Bounds in the Resize handler, you will notice maximize typically sets the corners off-screen, e.g. the top left corner to (-4,-4) which is fine when you have a single monitor (the maximized form would protrude on a second monitor if you watch closely).

You could forego the built-in maximizing, and do it yourself in as much as you need it.
Also SystemInformation.PrimaryMonitorMaximizedWindowSize might be of interest.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Maximize and not hide taskbar

David Muir14-Mar-09 4:37

David Muir

14-Mar-09 4:37

Thanks

Manage to figure it out using SystemInformation.PrimaryMonitorMaximizedWindowSize and writing the maximze code by hand. Smile | :)

Re: Maximize and not hide taskbar

Enquiren12-Sep-09 22:05

Enquiren

12-Sep-09 22:05

Set this property in your load event, or make it a user option: this.MaximizedBounds = SystemInformation.WorkingArea;

how to cause current application to close upon arrival of new updated application ?

shabya14-Mar-09 3:14

shabya

14-Mar-09 3:14

hello,
i wrote an application in c# that starts automaticaly when computer starts.

i allready have code that prevents the application from running more than
once as follows:

static void Main()
        {
            Boolean firstInstance = false;
            string safeName = "xxx";
            Mutex mutex = new Mutex(true, safeName, out firstInstance);
            if (!firstInstance) return; 
        }

now when i publish a new version (i set the revision to increase
automaticaly) and run the setup file all is fine but the old application
still remains.
i get two copies running , one new and one old.
is there a way to tell the old version to close ? like an external event?

i am using only visual studio tools.

thanks in advance

avi

Re: how to cause current application to close upon arrival of new updated application ?

Navneet Hegde14-Mar-09 8:59

Navneet Hegde

14-Mar-09 8:59

Hi!

Do you mean to say that during updated installation you SETUP should remove previous installation.

Thanks!

Develop2Program & Program2Develop

Re: how to cause current application to close upon arrival of new updated application ?

shabya14-Mar-09 9:31

shabya

14-Mar-09 9:31

no no navneet hegde,
i ment that a previous program is still running,
now a new program needs to run instead of it so how will it end the
process of the previous program ? i dont want the old program and the new program to run but only the new one.

after the installation of the new program finishes , the old program closes and the new program takes it place..

i seen it done in famous apps , i wanna do it too...

thanks Smile | :)

Re: how to cause current application to close upon arrival of new updated application ?

Navneet Hegde15-Mar-09 0:13

Navneet Hegde

15-Mar-09 0:13

Hi!

Your new Application starts.
In Main get the collection of all the running processes.
Iterating it you get your running process object.
Compare it's build with this process build.
If it's greater than kill the previous process and continue with this process.
Else kill this process.

Thanks!

Develop2Program & Program2Develop

Re: how to cause current application to close upon arrival of new updated application ?

shabya15-Mar-09 11:27

shabya

15-Mar-09 11:27

ok , thanks i shall try that Smile | :)

Size of Color struct?

Mohammad Dayyan14-Mar-09 3:04

Mohammad Dayyan

14-Mar-09 3:04

Hello guys.

How much bytes does Color struct get ?

Thank you

Re: Size of Color struct? [modified]

Luc Pattyn14-Mar-09 3:15

Luc Pattyn

14-Mar-09 3:15

Mohammad Dayyan wrote:
How much bytes does Color struct get ?

what for? static data? instance data? IL code? native code?

each Color instance is a struct which only offers four 8-bit components (A, R, G, B), so 32-bit seems the obvious answer. You can measure that yourself.

ADDED: see correction in another message [/ADDED]

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

modified on Saturday, March 14, 2009 10:42 AM

Re: Size of Color struct?

Mohammad Dayyan14-Mar-09 3:19

Mohammad Dayyan

14-Mar-09 3:19

I've got it, thanks Thumbs Up | :thumbsup:

Re: Size of Color struct?

Luc Pattyn14-Mar-09 3:26

Luc Pattyn

14-Mar-09 3:26

You're welcome.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Size of Color struct?

#realJSOP14-Mar-09 3:31

#realJSOP

14-Mar-09 3:31

The important point here is that it would have taken just one line of code to find that out on his own. I have a winform app standing by specifically to test things and discover stuff just like this.

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