C#

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A common error in design Ennis Ray Lynch, Jr.23-Jun-09 5:23 Ennis Ray Lynch, Jr. 23-Jun-09 5:23  A common error in design in sockets programming with TCP/IP sockets that I see occurring constantly are status messages being sent to verify receipt. TCP/IP is a guaranteed in order protocol. Eliminate the status messages and only send a message if requested explicitly. Furthermore, TCP keep-alive should be used and not keep alive messages. Need custom software developed? I do C# development and consulting all over the United States. A man said to the universe: "Sir I exist!" "However," replied the universe, "The fact has not created in me A sense of obligation." --Stephen Crane Re: Sending mutliple messages to a sock with mutliple return messages Gareth H23-Jun-09 5:24 Gareth H 23-Jun-09 5:24  I don't send status messages, I only send data that is required. Regards, Gareth. (FKA gareth111) Re: Sending mutliple messages to a sock with mutliple return messages Ennis Ray Lynch, Jr.23-Jun-09 5:30 Ennis Ray Lynch, Jr. 23-Jun-09 5:30  You said that the Java server is spamming you with responses. So I assumed they were unnecessary. If the responses are necessary then they are not spam and then only way to reduce them is to not send messages. Your TCP/IP stack on Windows and from within Java should both be using the Nagle Algorithm so as long as that is not disabled and you do not force a send then the best you can do is send data when you have it and request data when you need it. If you want to reduce bandwidth for streaming extremely large files you can compress the files using build in compression (see the J# library since it will have the same compression libraries as Java will have access to) or you can author your own. Need custom software developed? I do C# development and consulting all over the United States. A man said to the universe: "Sir I exist!" "However," replied the universe, "The fact has not created in me A sense of obligation." --Stephen Crane Writing error to a browser kibromg23-Jun-09 4:46 kibromg 23-Jun-09 4:46  Hi all, I am trying to write a database connection error to a Browser using Response.write("error message") command. try { cnx.Open(); cmd.ExecuteNonQuery(); // sResult = int.Parse(par.Value.ToString());// 1 if successful insert } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { cnx.Close(); } I would like to write the error message to a browser if connection is not possible. can i do this? resonse.write (Console.WriteLine(ex.Message)); Re: Writing error to a browser 0x3c023-Jun-09 5:17 0x3c0 23-Jun-09 5:17  This isn't my field of knowledge, but I would think that you would do Response.Write(ex.Message). As it is now, that line of code won't even compile Between the idea And the reality Between the motion And the act Falls the Shadow Re: Writing error to a browser EliottA23-Jun-09 5:18 EliottA 23-Jun-09 5:18  So your application is a console application? Why are you unable to write to the Console, the only thing I fear is that you are creating a windows forms application and you are still trying to write to the console. Check out the CodeProject forum Guidelines[^] The original soapbox 1.0 is back![^] Re: Writing error to a browser Gary Stafford23-Jun-09 14:57 Gary Stafford 23-Jun-09 14:57  Yes, the first answer (Computafreak's) is correct, Response.Write(ex.Message); if your writing an ASP.NET Web Application. But, looking at your code, I suspect you are writing a Windows Application due to your reference to Console.WriteLine(). This is a stretch, you want to send a Windows Application generated error message to a web browser window? Who's browser - yours, or a user of the application? At what URL? I think you may want to CLARIFY your question with some more details on the type of application you are writing. Regards, Gary The process cannot access the file because it is being used by another process. singhdurgesh23-Jun-09 4:42 singhdurgesh 23-Jun-09 4:42  Hi I am writting the following code to write into text file.After Checking whether the file exixt or not ,It is giving the following error.Can any one help. Any solution to this problem would be appreciated. public void Ping(string hostName) { string path; path = @"C:\CheckList\checklist_"+DateTime.Now.ToString("yyyyMMdd")+".txt"; if (!File.Exists(path)) { File.Create(path); } TextWriter tw = new StreamWriter(path,true); Error comes when we create text writer. Re: The process cannot access the file because it is being used by another process. Ennis Ray Lynch, Jr.23-Jun-09 4:52 Ennis Ray Lynch, Jr. 23-Jun-09 4:52  File.Create returns an open stream to the file created, locking it. Need custom software developed? I do C# development and consulting all over the United States. A man said to the universe: "Sir I exist!" "However," replied the universe, "The fact has not created in me A sense of obligation." --Stephen Crane Re: The process cannot access the file because it is being used by another process. pkreddy0423-Jun-09 5:07 pkreddy04 23-Jun-09 5:07  Check if the file is being used by some other process? Are you writing to a directory which is read only? Re: The process cannot access the file because it is being used by another process. 0x3c023-Jun-09 5:19 0x3c0 23-Jun-09 5:19  You don't need the if statement at all. If the file doesn't exist, the StreamWriter will create it Between the idea And the reality Between the motion And the act Falls the Shadow is it possible? billy dev23-Jun-09 3:55 billy dev 23-Jun-09 3:55  hi guys, i am a newbie coder in c# and i am trying to code a program that will be executed on his own.i think this called logic bombs.i would appreciate if someone could give an outline of what i have to do..i don't want to write me code just the idea. thanks in advance.. Re: is it possible? DaveyM6923-Jun-09 4:03 DaveyM69 23-Jun-09 4:03  If you really mean Logic Bomb[^] then no one here is going to help you. If you just want a standalone exe, then yes you can. If the required .net framework is installed on the target machine and the app has no external dependancies, the exe will run fine. If it's for a machine without the .net framework then take a trip to c++ land. Dave BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn) Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia) Why are you using VB6? Do you hate yourself? (Christian Graus) Re: is it possible? EliottA23-Jun-09 4:05 EliottA 23-Jun-09 4:05  Well at least users stopped hiding their intentions (see Rajdeep.net) and just come out and say they have malicious intentions. 1 for the post, but 5 for having the balls to come out and say it. Check out the CodeProject forum Guidelines[^] The original soapbox 1.0 is back![^] Re: is it possible? DaveyM6923-Jun-09 4:11 DaveyM69 23-Jun-09 4:11  EliottA wrote: users stopped hiding their intentions The exact same thought crossed my mind Dave BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn) Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia) Why are you using VB6? Do you hate yourself? (Christian Graus) Re: is it possible? OriginalGriff23-Jun-09 4:17 OriginalGriff 23-Jun-09 4:17  Please, please, don't mention that name (he might come back) No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced. This message is made of fully recyclable Zeros and Ones Re: is it possible? DaveyM6923-Jun-09 4:34 DaveyM69 23-Jun-09 4:34  He was active recently (16th[^]) but in the C++ forum. He's probably finally figured out that he can't really write nasty stuff successfuly using a .NET language. I think C++ will be above his intellectual abilities though so the world will remain safe. Dave BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn) Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia) Why are you using VB6? Do you hate yourself? (Christian Graus) Re: is it possible? EliottA23-Jun-09 5:26 EliottA 23-Jun-09 5:26  Bah, I posted a warning to the C++ members in that thread, specifically Superman who was more then helpful. Hopefully they see it and review his messages to limit the flow of direct code to him. Check out the CodeProject forum Guidelines[^] The original soapbox 1.0 is back![^] Re: is it possible? EliottA23-Jun-09 6:48 EliottA 23-Jun-09 6:48  Son of a b*&^h, you where right. See few threads above. Check out the CodeProject forum Guidelines[^] The original soapbox 1.0 is back![^] Re: is it possible? OriginalGriff23-Jun-09 21:15 OriginalGriff 23-Jun-09 21:15  Believe me, I wish I wasn't... No trees were harmed in the sending of this message; however, a significant number of electrons were slightly inconvenienced. This message is made of fully recyclable Zeros and Ones Re: is it possible? Not Active23-Jun-09 4:06 Not Active 23-Jun-09 4:06  A Logic bomb is a malicious piece of code which you will find no help in creating here. only two letters away from being an asset Re: is it possible? billy dev23-Jun-09 4:20 billy dev 23-Jun-09 4:20  i want to code a windows service that will start alone,like an alarm clock..if t is malicious and is called logic bomb ..sorry i didn't know it... Re: is it possible? Simon P Stevens23-Jun-09 5:19 Simon P Stevens 23-Jun-09 5:19  It is possible to write windows services in .net. It does not run itself though, you have to set up windows to startup the service for you and it is not called a logic bomb. There is a guide on MSDN here[^] on how to create services. Simon Re: is it possible? DaveyM6923-Jun-09 5:45 DaveyM69 23-Jun-09 5:45  Fair enough. Simon's given you the solution you need. Dave BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn) Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia) Why are you using VB6? Do you hate yourself? (Christian Graus) moving in windows form by keyboard ENTER key sachees12323-Jun-09 3:11 sachees123 23-Jun-09 3:11  frnds, how to move focus of one component(textbox, date picker, combo...) to other component. with ENTER key? i tried key press with ..... code private void txtAppfrmNo_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { if (e.KeyChar == (char)13) { MessageBox.Show("to next box"); } } ****************************************************************** this.txtAppfrmNo.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtAppfrmNo_KeyPress); **************************************************** its not working, where is the problem???

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