Re: Closing form ControlBox - C# Discussion Boards

Re: Adding Rows To Data Set

Polis Pilavas9-Dec-05 12:05

Polis Pilavas

9-Dec-05 12:05

Did you try taking a look here[^]?

Regards,
Polis

Can you practice what you teach?

TCP Socket Problems

c#guy38119-Dec-05 4:20

c#guy3811

9-Dec-05 4:20

I have a client/server relationship which I use to update files on connected users' computers. It uses Asynchronous Socket operations and sends binary data over TCP sockets. The connections are maintained indefinately until the client or server disconnects, or a client encounters an error and closes the connection. The problem I am having is that after a few days, the server stops sending messages to its clients. The number of clients right now is about 20-25, which are connected at all times. I see from the message logs that it is receiveing client requests, but it is not sending a response to those clients. The server is set to send updates at 12:30 AM every day, but after about 4 days it stops sending anything. I know it would be helpful to have the code, but not knowing where exactly the problem is, it is hard to post code, and there is A LOT of it.

Any ideas on what the problem may be are appreciated. Thanks in advance!

Re: TCP Socket Problems

Ista9-Dec-05 16:24

Ista

9-Dec-05 16:24

I fixed this problem once.

I can't remember the solution, but I think I had a thread to keep it alive. Becuase the CLR tries to shut it down after a certain period of time.

Nick

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: TCP Socket Problems

Ista9-Dec-05 16:26

Ista

9-Dec-05 16:26

I would also attach and event counters to it, to see if the OS is shutting it down and something sporadic isd happening.

I'm not an expert yet, but I play one at work. Yeah and here too.

Re: TCP Socket Problems

mcljava12-Dec-05 8:13

mcljava

12-Dec-05 8:13

Beware of IP address changes. If your clients are DHCP based and the IP resets at somepoint during your conenction then you will have a problem. For example if your DHCP address lease is for 3 days then you might want to visit that.

Also, make sure your read logic in the server and client is looking for its corresponding peer to drop. I.E. if recv() returns 0 or if a SocketException occurs, depending on how your code is structured. The application should free up any socket related resources and return to a steady state. For the server, this means listebing for new connections. For the client, either exiting or initiating a connection retry sequence.

Finally have you stress tested your server? How long can it sustain a constant message flow? If the answer is not indefinitely then you might want to revist the server code to make it moe robust. If it were me, I would make sure the server is 100% bullet proof under load to understand how it performs and what to expect in terms of client communication. Remember any test harness you build should use the same client connection logic. Once you nail that down consider creating a library so that you can build client applications w/o fussing with the connection details.

Mike Luster

Re: TCP Socket Problems

c#guy381112-Dec-05 9:02

c#guy3811

12-Dec-05 9:02

The clients and servers both use a .dll for connection/send/rcv data. The server assigns the new socket to an ArrayList when a client connects, and gives the client an associated number. When a client disconnects, the server removes the client at the ClientNumber position in the ArrayList, then updates all necessary ClientNumbers to the correct position. While the update is going on, the server is suspended, IE, it can not accept new connections until the update is complete.

The client dll backend catches an error, performs cleanup procedures, then trys to reconnect at a random interval. The connect/disconnect portion of the program isnt the problem. Even when the server hangs it still accepts/disconnects.

IP Addresses are static. That shouldnt be a problem. Im beginning to think that it may be some of the other software running on the actual server with my server program. I think the backup software is locking the database when the server tries to update file listings. When I came in this morning, the ListView telling me what the current files were was empty, suggesting it failed contacting the database. If that is the case, then when it tries sending files, it wont have any references in the DataSets, and will simply return from the function without sending anything. Ill keep everyone informed incase the problem may come up with someone else.

Closing form ControlBox

zaboboa9-Dec-05 3:42

zaboboa

9-Dec-05 3:42

Hello,

Is there a way when we close the form using X (top right corner of the form on the ControlBox), to make it act as a cancel event, when I press Cancel button on this form. In other words, to run cancel button event?

Thank you

Re: Closing form ControlBox

kobymeir9-Dec-05 8:42

kobymeir

9-Dec-05 8:42

every form has two properties :

AcceptButton:
called when the user press "ENTER".
and the button appears differently.

CancelButton

called when the user press "ESC" or click the close button.

in both cases the form calls the click event of the according button.

hope i helped Wink | ;)

Pls. Help anyone

bry_quin9-Dec-05 3:15

bry_quin

9-Dec-05 3:15

Hi to everyone!

I just want to ask if it is possible to make an application that all its inputs will appear on MS Word.. I mean if I type Hello on the application, it would automatically appear in MS Word.. If it is can someone tell me how.. thanks a lot

bryz

-- modified at 9:18 Friday 9th December, 2005

Re: Pls. Help anyone

Polis Pilavas9-Dec-05 4:00

Polis Pilavas

9-Dec-05 4:00

I guess what you're saying is that if you type something in a textBox, you want it to appear inside a Ms Word document right? Take a look at this[^]. It covers a lot of stuff for communicating with Ms Word from C#

Regards,
Polis

Can you practice what you teach?

Re: Pls. Help anyone

bry_quin10-Dec-05 1:25

bry_quin

10-Dec-05 1:25

Polis, Thanks a lot..

Regards,
Bryan Smile | :)

Pls. Help

bry_quin9-Dec-05 3:14

bry_quin

9-Dec-05 3:14

Hi to everyone!

I just want to ask if it is possible to make an application that all its inputs will appear on MS Word.. If it is can someone tell me how.. thanks a lot

bryz

Re: Pls. Help

agileagent9-Dec-05 3:22

agileagent

9-Dec-05 3:22

Can you explain more about your prb. Or atleast rephrase your Q

-A

Work smarter, not harder

Re: Pls. Help

bry_quin9-Dec-05 20:34

bry_quin

9-Dec-05 20:34

Actually, I am planning to make an application whose input (from a user) that will have its output reflected in another application (like notepad).. is it possible? Ex. if I am the user and I type "Hello" , "World" then the output would appear in the notepad each time a word is typed. If it is possible, can you teach me how to do it? Thanx a lot

web forms with an iframe

ckruger9-Dec-05 3:14

ckruger

9-Dec-05 3:14

I know that iframes are HTML code but I'm using it in my web form. I have created two web forms, the one is used the main wep page and the other is displayed inside an iframe on the main web page. The web page inside the contais a CheckBoxList and I want to acces this list from the main web page.

Please help...

Emulating string.Format(..)

MrEyes9-Dec-05 1:32

MrEyes

9-Dec-05 1:32

Can anybody tell me how to implement a string.Format(..) style function.

i.e. the string.Format() function can take an unlimited amount of parameters, how can I do the same thing in my own functions?

e.g. MyAdditionFunction(1,2)

Which adds all the int values passed into it (the example above would return 3)

I would also like to be able to do:

MyAdditionFunction(1,2,3,4)

which would return 10

Like the string.Format(..) function the MyAdditionFunction can take any amount of parameters

post.mode = postmodes.signature;
SELECT everything FROM everywhere WHERE something = something_else;
> 1 Row Returned
> 42

Re: Emulating string.Format(..)

leppie9-Dec-05 1:38

leppie

9-Dec-05 1:38

void Foo(params int[] values)
{
  foreach (int i in values) Console.WriteLine(i);
}
...
F(1);
F(1,2);
F(1,2,3);

^{xacc.ide-0.1.0.11 released! Now working properly under .NET 2 :) Download and screenshots}

Re: Emulating string.Format(..)

J4amieC9-Dec-05 2:06

J4amieC

9-Dec-05 2:06

public int MyAdditionFunction(params int [] values)
{
   int total = 0;
   foreach(int i in values)
      total += i;
   return total;
}

usage:

Console.WriteLine(MyAdditionFuntion(1,2,3,4,5));

To show a child form in MDI form?

MudkiSekhon9-Dec-05 0:56

MudkiSekhon

9-Dec-05 0:56

How can we show a child form in the MDI form?

I have set the IsMdiContainer proprty of main form to true.
Now I cannot any such kind of propert (like in VB we set MDIChild property of child form to true) so that I can show the child form within the boundaries of Main Form.

I am new to Windows Forms

Thanks,
Sandeep
+919891027854

Re: To show a child form in MDI form?

akyriako789-Dec-05 1:03

akyriako78

9-Dec-05 1:03

Set the MDIParent property of the child form to the parent form.

e.g

//suppose the code is in the parent form
//so "this" keyword represent your MDI container

MDIChild mdiChild = new MDIChild();
mdiChild.MDIParent = this;
mdiChild.Show();

On the other hand you could provide parent as a parameter in the constructor of the child in order to automate the process and set there the MDIParent property

Re: To show a child form in MDI form?

MudkiSekhon9-Dec-05 1:56

MudkiSekhon

9-Dec-05 1:56

Thanks for ur reply. I have one more query from u.........
How can we set the MDIParent of the child form which we had made dialog modal (eg. Login Form if I had called it by ShowDialog() method)

Thanks,
Sandeep
+919891027854

Re: To show a child form in MDI form?

akyriako789-Dec-05 2:33

akyriako78

9-Dec-05 2:33

You can't.Only non-modal and non-TopMost windows can be set as child.

WinFX

Greeky9-Dec-05 0:41

Greeky

9-Dec-05 0:41

:'( :'(
I wanna die.

I realized that maskedtextbox sinot run on machines Before XP SP2.
What do u offer me?

http://winfx.msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/T_System_Windows_Forms_MaskedTextBox.asp[^]

The WinFX Runtime Components September 2005 CTP are supported on Microsoft Windows XP SP2, Windows Server 2003 SP1, and Microsoft© Windows© VistaTM

Re: WinFX

Robert Rohde9-Dec-05 1:20

Robert Rohde

9-Dec-05 1:20

Probably installing XP SP2? Confused | :confused:

Re: WinFX

Greeky9-Dec-05 2:39

Greeky

9-Dec-05 2:39

how could i install xp sp2 to windows me?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.