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• Differences between App.Config and Web.Config?

  - by Jack McG

  when building a desktop app in wpf can you read documentation of problems and safely subsititute 'app.config' when people's answer's refer to 'web.config'? if so are there any glaring GOTCHAS you have to look out for? tnx

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• Asynchronous sockets in C#

  - by IVlad

  I'm confused about the correct way of using asynchronous socket methods in C#. I will refer to these two articles to explain things and ask my questions: MSDN article on asynchronous client sockets and devarticles.com article on socket programming. My question is about the BeginReceive() method. The MSDN article uses these two functions to handle receiving data: private static void Receive(Socket client) { try { // Create the state object. StateObject state = new StateObject(); state.workSocket = client; // Begin receiving the data from the remote device. client.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state); } catch (Exception e) { Console.WriteLine(e.ToString()); } } private static void ReceiveCallback( IAsyncResult ar ) { try { // Retrieve the state object and the client socket // from the asynchronous state object. StateObject state = (StateObject) ar.AsyncState; Socket client = state.workSocket; // Read data from the remote device. int bytesRead = client.EndReceive(ar); if (bytesRead > 0) { // There might be more data, so store the data received so far. state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead)); // Get the rest of the data. client.BeginReceive(state.buffer,0,StateObject.BufferSize,0, new AsyncCallback(ReceiveCallback), state); } else { // All the data has arrived; put it in response. if (state.sb.Length > 1) { response = state.sb.ToString(); } // Signal that all bytes have been received. receiveDone.Set(); } } catch (Exception e) { Console.WriteLine(e.ToString()); } } While the devarticles.com tutorial passes null for the last parameter of the BeginReceive method, and goes on to explain that the last parameter is useful when we're dealing with multiple sockets. Now my questions are: What is the point of passing a state to the BeginReceive method if we're only working with a single socket? Is it to avoid using a class field? It seems like there's little point in doing it, but maybe I'm missing something. How can the state parameter help when dealing with multiple sockets? If I'm calling client.BeginReceive(...), won't all the data be read from the client socket? The devarticles.com tutorial makes it sound like in this call: m_asynResult = m_socClient.BeginReceive (theSocPkt.dataBuffer,0,theSocPkt.dataBuffer.Length, SocketFlags.None,pfnCallBack,theSocPkt); Data will be read from the theSocPkt.thisSocket socket, instead of from the m_socClient socket. In their example the two are one and the same, but what happens if that is not the case? I just don't really see where that last argument is useful or at least how it helps with multiple sockets. If I have multiple sockets, I still need to call BeginReceive on each of them, right?

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• Can a Winforms/WPF app act as HTTP server?

  - by user46703

  Hi, I have a desktop written with Winforms. Now I have requests that people want to access the data from other machines. First I thought about a regular Client/Server app but now I think best would be if the app could act as HTTP server and send HTML to connected browsers. Does anybody know if there is a library available to add HTTP server functionality to an app? Ideally it would be able to serve ASP.NET content.

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• Linux scp command issue

  - by George2

  Hello everyone, I am using scp command to copy file from a MacBook Pro OS X 10.5 to another Linux box (Red Hat Linux Enterprise 5). I am using the following command on Mac, sudo scp ~/.ssh/mykey.rsa [email protected], there is no output from Mac command line. I am not sure whether the scp is success or not. Where is the location the file mykey.rsa on remote computer 10.10.100.101? thanks in advance, George

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• How to host eclipse plugins(cheatsheet)???

  - by Rahul

  Hi, I have developed a eclipse plugin (cheatsheet)..that is in jar format. Can anyone tell me how to host that plugin publicily or in tomcat server so that remote user can install it through the given URL???? using this ...Help-Install Software (in eclipse)..i don't want copy paste that plugin in eclipse-plugin folder i want to install that....

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• Uploading Large Files

  - by mohamed hadad

  Hello, I'm using a windows service on my server to receive large files (1 GB) from desktop clients when I use the TCPClient class it creates astream to send the file which bloks my memory, What is the well designe for this problem

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• How you guys watching new questions on StackOverflow? [closed]

  - by ty

  I just wondering how my questions got answered so quickly? How you guys watching new questions on StackOverflow? Does StackOverflow has some sort of desktop widgets which can auto-push question to you?

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• Concurrent use of System.Net.Mail.SendAsync?

  - by Bob

  I want to use System.Net.Mail.SendAync in an ASP.NET MVC2 application. I see that it throws an InvalidOperationException if there is already a SendAsync call in progress. Does this mean only one SendAsync is allowed per host, or per thread? For example, if I simultaneously have 2 web users from 2 different remote hosts, can each use SendAsync at the same time?

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• Why does my UIActivityIndicatorView only display once?

  - by Schwigg

  I'm developing an iPhone app that features a tab-bar based navigation with five tabs. Each tab contains a UITableView whose data is retrieved remotely. Ideally, I would like to use a single UIActivityIndicatorView (a subview of the window) that is started/stopped during this remote retrieval - once per tab. Here's how I set up the spinner in the AppDelegate: - (void)applicationDidFinishLaunching:(UIApplication *)application { [window addSubview:rootController.view]; activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; [activityIndicator setCenter:CGPointMake(160, 200)]; [window addSubview:activityIndicator]; [window makeKeyAndVisible]; } Since my tabs were all performing a similiar function, I created a base class that all of my tabs' ViewControllers inherit from. Here is the method I'm using to do the remote retrieval: - (void)parseXMLFileAtURL:(NSString *)URL { NSAutoreleasePool *apool = [[NSAutoreleasePool alloc] init]; AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; NSLog(@"parseXMLFileAtURL started."); [appDelegate.activityIndicator startAnimating]; NSLog(@"appDelegate.activityIndicator: %@", appDelegate.activityIndicator); articles = [[NSMutableArray alloc] init]; NSURL *xmlURL = [NSURL URLWithString:URL]; rssParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; [rssParser setDelegate:self]; [rssParser setShouldProcessNamespaces:NO]; [rssParser setShouldReportNamespacePrefixes:NO]; [rssParser setShouldResolveExternalEntities:NO]; [rssParser parse]; NSLog(@"parseXMLFileAtURL finished."); [appDelegate.activityIndicator stopAnimating]; [apool release]; } This method is being called by each view controller as follows: - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; if ([articles count] == 0) { NSString *path = @"http://www.myproject.com/rss1.xml"; [self performSelectorInBackground:@selector(parseXMLFileAtURL:) withObject:path]; } } This works great while the application loads the first tab's content. I'm presented with the empty table and the spinner. As soon as the content loads, the spinner goes away. Strangely, when I click the second tab, the NSLog messages from the -parseXMLFileAtURL: method show up in the log, but the screen hangs on the first tab's view and I do not see the spinner. As soon as the content is done downloading, the second tab's view appears. I suspect this has something to do with threading, with which I'm still becoming acquainted. Am I doing something obviously wrong here?

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• Difference between Java SE/EE/ME?

  - by Richard Knop

  Which one should I install when I want to start learning Java? I going to start with some basics so I will create simple programs that create files, directories, edit XML files and so on, nothing too complex for now. I guess Java SE (Standard Edition) is the one I should install on my Windows 7 desktop? I already have Komodo IDE which I will use to write Java code.

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• Good Project Organization Software

  - by QAH

  Hello everyone! I am really having a hard time trying to set a schedule with development of my game. I would do better and quicker development if I had some sort of schedule to go by. What are some good programs out there, desktop or web, that allow you to easily organize your project and set development goals and milestones? I would prefer options that are free in cost, but feel free to mention non-free programs also. Thanks alot

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• Active Record Validations : uniqueness of

  - by Elliot

  Hey guys, I'm using http://ar.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html#M000086 to validate records. My form is currently a remote form, using RJS. My question, is how to I return the :message (for errors) to the page through ajax (and I assume the create.rjs file)? Best, Elliot

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• get mail, Fire Job, Asp.Net, C#.Net

  - by AjmeraInfo

  I live in India and My hosting server at US. I am using MSSQL, ASP.Net and C#.Net I want to fire job when i will get email. ex. someone send mail on my address. then i want to get sms for email description. it not possible to install any desktop or console application on US hosting server. I don't have that type of rights.

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• google-app-engine deploy error..

  - by zjm1126

  2010-04-20 15:33:39,421 WARNING appengine_rpc.py:399 ssl module not found. Without the ssl module, the identity of the remote host cannot be verified, and connections may NOT be secure. To fix this, please install the ssl module from http://pypi.python.org/pypi/ssl . To learn more, see http://code.google.com/appengine/kb/general.html#rpcssl . how can i do ? thanks

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• Linux Bluetooth programming

  - by sfactor

  I am making a desktop application to connect with an embedded device. I was going to use Windows but due to lack of proper examples and documentation I decided to go with Linux bluez development. Can someone suggest a good resource to go about programming for bluez. I found a MIT documentation but that was about it.

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• JConsole and WAS 7.0

  - by Sathish Gopal

  Hi all, I'm trying JConsole to connect to my remote server running WAS 7.0 Appserver. After googling, i found ways to connect to WAS 7.0. but all the regular tabs in jconsole is disabled. How do i enable these tabs? WAS 7.0 is running on IBM J9 VM and jconsole is also running on the same JRE. Regards Sathish

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• JNDI / Classpath problem in glassfish

  - by Michael Borgwardt

  I am in the process of converting a large J2EE app from EJB 2 to EJB 3 (all stateless session beans, using glassfish 2.1.1), and running out of ideas. The first EJB I converted (let's call it Foo) ran without major problems (it was the only one in its ejb-module and I could completely replace the deployment descriptor with annotations) and the app ran fine. But after converting the second one (let's call it Bar, one of several in a different ejb-module) there is a weird combination of problems: The app deploys without errors (nothing in the logs either) There is an error when looking up Bar via JNDI When looking at the JNDI tree in the glassfish admin console, Bar is not present at all. Then when I look at the logs, I see this (Foo is the correct name of the EJB's remote interface of the first converted, previously working EJB): Caused by: javax.naming.NamingException: ejb ref resolution error for remote business interface Foo [Root exception is java.lang.ClassNotFoundException: Foo] at com.sun.ejb.EJBUtils.lookupRemote30BusinessObject(EJBUtils.java:425) at com.sun.ejb.containers.RemoteBusinessObjectFactory.getObjectInstance(RemoteBusinessObjectFactory.java:74) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) at com.sun.enterprise.naming.SerialContext.lookup(SerialContext.java:414) at com.sun.enterprise.naming.SerialContext.list(SerialContext.java:603) at javax.naming.InitialContext.list(InitialContext.java:395) at com.sun.enterprise.admin.monitor.jndi.JndiMBeanHelper.getJndiEntriesByContextPath(JndiMBeanHelper.java:106) at com.sun.enterprise.admin.monitor.jndi.JndiMBeanImpl.getNames(JndiMBeanImpl.java:231) ... 68 more Caused by: java.lang.ClassNotFoundException: XXX at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1578) at com.sun.ejb.EJBUtils.getBusinessIntfClassLoader(EJBUtils.java:679) at com.sun.ejb.EJBUtils.lookupRemote30BusinessObject(EJBUtils.java:348) ... 75 more This is followed by more exceptions for all the entries that (like Foo) do appear in the JNDI tree. These look like this: Caused by: javax.naming.NotContextException: BarHome cannot be listed at com.sun.enterprise.naming.SerialContext.list(SerialContext.java:607) at javax.naming.InitialContext.list(InitialContext.java:395) at com.sun.enterprise.admin.monitor.jndi.JndiMBeanHelper.getJndiEntriesByContextPath(JndiMBeanHelper.java:106) at com.sun.enterprise.admin.monitor.jndi.JndiMBeanImpl.getNames(JndiMBeanImpl.java:231) ... 68 more However, no exception for Bar, it does not appear in the log at all except one entry during deployment. The other EJBs in the same module do appear, as does Foo. Any ideas what could cause this or how to diagnose it further? The beans are pretty straightforward: @Stateless(name = "Foo") @RolesAllowed("FOOUSER") @TransactionAttribute(TransactionAttributeType.SUPPORTS) public class FooImpl extends BaseBean implements Foo { I'm also having some problems with the deployment descriptor for Bar (I'd like to eliminate it, but glassfish doesn't seem to like having a bean appear only in sun-ejb-jar.xml, or having some beans in a module declared in the descriptor and others use only annotations), but I can't see how that could cause the ClassNotFoundException on Foo. Is there a way to see the ClassPath that Glassfish is actually using?

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• Web application vs. web services vs. classic application

  - by Cicik

  Please I need help. I have project in which I need application which communicates with local DB server and simultaneously with central remote DB server to complete some task(read stock quotas from local server create order and then write order to central orders DB,...). So, I don`t know which architecture and technology do this. Web application, .NET WinForms client applications on each computer, or web services based central application with client applications? What are general differences between this approaches? Thanks

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• Is there any WinSCP equivalent for linux?

  - by MiniQuark

  I love WinSCP for Windows. What are the best equivalent softwares for linux? I tried to use sshfs to mount the remote file system on my local machine, but it is not as user friendly as simply launching a GUI, plus it seems to require root access on the client machine, which is not very convenient. Of course command line tools such as scp are possible, but I am looking for a simple GUI. Thanks!

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• c# WebRequest class and headers

  - by Sir Psycho

  Hi, When I try to set the header properties on a WebRequest object, I get the following exception This header must be modified using the appropriate property I've tried modifying the .Headers propery and adding them that way like so webRequest.Headers.Add(HttpRequestHeader.Referer, "http://stackoverflow.com"); But still getting exceptions. I can get around this by casting the WebRequest object to a HttpWebRequest and setting the properties such as httpWebReq.Referer ="http://stackoverflow.com" But I'd like to know if there's a way to get a finer grained control over modifying headers with a request for a remote resource. Thanks

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• Intro to GPU programming

  - by Adam Davis

  Everyone has this huge massively parallelized supercomputer on their desktop in the form of a graphics card GPU. What is the "hello world" equivalent of the GPU community? What do I do, where do I go, to get started programming the GPU for the major GPU vendors? -Adam

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• ASP/VBScript ServerXmlHttp Encoding

  - by colinramsay

  I'm pulling an RSS feed from a remote location using ServerXmlHttp: Dim httpRequest set httpRequest = server.createObject("Msxml2.ServerXMLHTTP.6.0") httpRequest.open "GET", "http://www.someurl.com/feed.xml", false httpRequest.send() response.write httpRequest.responseXML.xml However there must be encoding issues somewhere along the line as I'm seeing ???? where there should be some Japanese characters. Does anyone have any guidance when working with ServerXmlHttp? Thanks.

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• Possible to compress SQL Server network traffic?

  - by Philip Fourie

  I have a .NET client that needs to connect to a remote SQL Server over the WAN, is it possible to compress SQL traffic between the client and the server? I am using .NET 3.5 and SQL Server 2005 and greater.

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• Winsock Connect Problem with Eset Nod32

  - by AFgone

  Dear All, my socket library which is implemented using winsock2 is working properly. But when ESET Nod32 installed on the computer, connect() function returns 0(zero) ,that is success, even if remote host is not available. I looked with netstat -b command and saw that ekrn.exe is accepting the client. And after couple of seconds it sends zero byte of information,which means graceful close. So how can I overcome this problem? Many thanks, regards...

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• Quickest way to find the oldest file in a directory using Delphi

  - by Pieter van Wyk

  HI We have a large number of remote computers that capture video onto disk drives. Each camera has it's own unique directory and there can be up to 16 directories on any one disk. I'm trying to locate the oldest video file on the disk but using FindFirst/FindNext to compare the File Creation DateTime takes forever. Does anybody know of a more efficient way of finding the oldest file in a directory? We remotely connect to the pc's from a central HO location. Regards, Pieter

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