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  • Drive a POS printer via USB in c#

    - by JDibble
    Any ideas how i can best drive a USB POS printer from c#. POS printers are usually serial, TCP/IP or USB based. I know how to accomplish serial and TCP/IP but have no idea about communications through USB in C#. I know that there is a layer available from Microsoft called POS.NET, but I want to try and avoid using this. Any ideas or any C# libraries that people can recomend would be really appreciated. Thanks

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  • Can jpg images support animation?

    - by Ashish
    Well guys. we are not supposed to ask theoratical questions here .. but dint know any other forum where someone would answer this :) jpeg image How is the above jpg image can be animated? As far as I know jpg format does not support animation.

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  • Ubuntu - No gnome-panels, no right-click, no internet, no hotkeys

    - by Darthfett
    Hey guys, I've been using Ubuntu (Maverick 10.10) on my desktop (ATI Radeon 5830) for about 3 weeks now, but all of a sudden I am unable to even use my computer. As soon as I start up, I see my desktop, with icons, but I don't see any gnome-panels, and I'm unable to get any options if I right-click. I can start programs by double clicking them. I also cannot get an internet connection. I've tried restarting gnome-panel by killing it, using Ctrl+Alt+5 to switch to a terminal (I don't have a shortcut to one on my desktop, and no hotkeys will work), but no luck. Restarting my computer has no effect upon this (I have to manually cut the power, since I don't know the terminal command). As far as I know, I have not made any changes, and I've never had any problems in the past. This started when I was playing Minecraft, but my internet crapped out, and no amount of re-trying the connection would work. I know it was my computer, as my brother's was working fine in the other room. Any clues as to what's going on? I'm more than willing to troubleshoot.

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  • Is Cherokee (probably) the best static content server for beginner sysadmins?

    - by Bad Learner
    I have read the pros and cons of most of the popular web servers and have come to a conclusion that Apache would (probably) be the best web server for serving dynamic content - - no wonder YouTube, Flickr and Facbook, among many others, use it. I do not know if that C10K problem applies to Apache even when serving dynamic content only, but I think any web server used to serve dynamic content needs some good tweaking for optimized performance, and the fact that nothing beats Apache when it comes to documentation, resources and support on the web, I think should will go with Apache for dynamic content. That apart, the confusion begins when it comes to choosing web servers for static content (including streaming videos). I see that Nginx, Cherokee and Lighttpd are among the best (I am not considering non-open source or non-linux stuff here). So, which too choose? I know one cannot go wrong with any of the three (Nginx, Cherokee, Lighttpd). Lighttpd's development has evidently gotten slower than it was a good time ago. The documentation is pretty good for all the three, and hopefully, so are the resources (knowledge of these among the users of Stackoverflow/Serverfault sites, the web etc). Precisely, and noting point [2] and [3], if I am not wrong, I should either go with Nginx or Cherokee. I would love to see someone clarify these... is Cherokee just as fast (mb/s), performant (connections/s), and reliable (think downtime/restarting server) as Nginx for serving static content and load balancing, for small, medium to large (and really large) websites and applications? (Think, the size of YouTube, Apache or Facebook.) if the answer for the Q above is a big "hell, yes!" then, I should probably prefer Cherokee, right? Because, since I am a beginner, it would a lot easier to setup Cherokee as it has a graphical admin user interface + really good documentation. Yes? I could be wrong, I could be right. I put down what I know so that you can offer most relevant advise. Pardon if anything I've said is offensive.

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  • Does my Oracle DBA need root access?

    - by Dr I
    I'm currently discussing with my Oracle DBA Collegue that request a root access on our production servers. I'm not so hot to let him use the root access on our production servers. He is arguing that he need it to perform some operations like restarting the server and some other obscure arguments. The point is that I'm not agree with him because I've set him a Oracle user/group and a dba group where Oracle user belong. Everything is running smoothy and without any root permissions for now. I also think that all administrative tasks like scheduled server restart and so one need to be operated by the proper administrator (The Systems administrator on our case) to avoid any kind of issues related to a misunderstanding of the infrastructure interactions. So, I need the help of both, sysadmins and Oracle DBAs to lead me on the correct direction. If my collegue really need this rights I'll give him, but I'm just basically quite affraid of that because of security and integrity concerns. I know that my collegue is really good as a Oracle DBA and he know is work very well, but I also know that I've very few cases where a software and its admin really need root access. Once again, I'm not looking for pros/cons but rather an advice on the way that I should take to deal with this situation.

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  • Why is dwm.exe using so much memory?

    - by Leonard Challis
    I've scoured the web, but I'm sick of reading "scan your computer for viruses" and "upgrade your RAM" on answers to similar questions to this. I understand that dwm.exe is for (simply put) caching bitmaps for things like Aero-peek and similar, but as far as I have read it shouldn't be using vast amounts of memory. My colleague and I both have 4GB of RAM, Core 2 Duo, blah, blah -- essentially they're pretty capable. His dwm.exe is running at around 30mb, mind is currently running at about half a gig, though it does fluctuate quite a lot. This is the same while running the exact same applications (currently Zend studio, FireFox (with firemin - low memory usage), Outlook). Every so often I will get a notification asking me if I want to switch to Aero Basic because it's using too much memory, and sometimes it will just switch itself to basic and let me know why. I know it's possible to stop it switching, but I want to know why it is using too much memory otherwise it's just papering over the cracks. One thing to add is this seems to have started after a robbery on Monday, where two of my monitors were stolen, and I had to temporarily use a couple of alternative monitors. I am now using brand new monitors but the problem is the same. All drivers installed and working seemingly fine. Any ideas why the usage is so high? We are using windows 7 64-bit Professional.

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  • automaticaly place downloaded files in folder bsed on downloads extention sufix

    - by Bart van Tuÿl
    I’m making a simple web browser for work eeh, what I’d like to know is if its possible to save a file of a particular extension to a particular file. I currently use googels chrome when downloading a file it places this (regardless of extension) in a downloads folder without asking where I ant to download this too. I want to achieve the same except that downloads with the extension .dwg are placed automatically in a folder named DWG DOWNLAODS… Dose anybody know how to achieve this in vb.net?

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  • Nested luabind classes declared in Lua

    - by Matt Fichman
    I am trying to declare a class B in a namespace A using Luabind (from the Lua side). I figure that if Luabind has a clean way to do this, it would look something like this: class 'A.B' (Super) function A.B:__init() Super.__init(self) end Notice that the B class is defined in the A table. I know the following hackish way of doing this: class 'A.B' (Super) A = {} A.B = _G['A.B'] However, I would really like to know if Luabind provides this feature explicitly.

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  • Simple question in ClientLogin using python gdata library

    Hi friends, I have incorporated ClientLogin into my python application to retrieve contact list of the user , I like to know how to get the name of the user who has logged in.My code to get the names from the contact list of the user is as given below gd_client = gdata.contacts.service.ContactsService() gd_client.email = yemail gd_client.password = ypass gd_client.source = 'GoogleInc-ContactsPythonSample-1' gd_client.ProgrammaticLogin() query = gdata.contacts.service.ContactsQuery() query.max_results=150 feed = gd_client.GetContactsFeed(query.ToUri()) for i, entry in enumerate(feed.entry): #print '\n%s %s' % (ctr+i+1, entry.title.text) na=entry.title.text names.append(na) Please help me to know how to get the name of the user who has logged in Thanks ganesh

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  • Bind Boolean value in Sqlite

    - by milanjansari
    Hello, Anyone have idea about how to bind Boolean in sqlite with objective - c. i know how to bind int and string but i don't know about boolean value. sqlite3_bind_int(addStmt, 1, id); sqlite3_bind_text(addStmt,3 ,[message UTF8String], -1, SQLITE_TRANSIENT); but how can i bind boolean value. Please help me. Thanks you

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  • How to insert date in sqlite through java.

    - by dimitar
    Hello guys, I want to make a database that will hold a date in it(SQLite). Now first to ask is what is the right syntax to declare a date column. The second i want to know is how to insert date in it after that. And the third thing i want to know is how to select dates between, for example to select all rows which contain date between 01/05/2010 and 05/06/2010. Thank you

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  • How do I process Proxy Digg JSON for use with jQuery?

    - by Brett
    I'm trying to deal with: "Requests made from Javascript running on your web pages must be proxied to avoid same-origin policy conflicts." I know how to work with the JSON once I've got it. But aside from copy-pasting the JSON results via my browser, I don't know how to localize it for use.

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  • Overriding or overloading?

    - by atch
    Guys I know this question is silly but just to make sure: Having in my class method: boolean equal(Document d) { //do something } I'm overloading this method nor overriding right? I know that this or similiar question will be on upcoming egzam and would be stupid to not get points for such a simple mistake;

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  • Run a script on user connection on the VM host

    - by Scott Chamberlain
    I have a server running a Virtual Desktop Managed Pool, what I would like to do is when a user logs in I would like a script to check the number of available VMs and if below a threashold add additional VMs to the pool. The script to check the load and add to the pool is not the problem, I have that already figured out: $collectionName = "Test1"; $rdvh = "vmHost.example.com"; $minAvailableVMs = 2; Import-Module RemoteDesktop; $pool = Get-VirtualDesktopCollection -CollectionName $collectionName; $availableVMs = $pool.Size - ($pool.Size * $pool.PercentInUse / 100); $status = Get-VirtualDesktopCollectionJobStatus $collectionName #only add new servers if we are below the threashold and in the JOB_COMPLETEED state if($availableVMs -lt $minAvailableVMs -and $status.Status -eq [Microsoft.RemoteDesktopServices.Management.VirtualDesktopCollectionJobStatus]::JOB_COMPLETED) { Add-RDVirtualDesktopToCollection -CollectionName $collectionName -VirtualDesktopAllocation @{"$rdvh" = 1} } The problem I am having is, how do I run the above script on the Virtualization Host/Connection Broker/Some other server when a user connects?. I don't think it would be appropriate to run this as a logon script inside the VM, I think there is a way to do this on the management side but I don't know the new scripting interface in Server 2012 R2 well enough to know which commandlets I should look for to schedule this. EDIT: I know System Center is perfect for this but I do not have a license and was denied when I asked for it to be added to the budget.

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  • Manually closing a port from commandline

    - by codingfreak
    Hi I want to close an open port which is in listening mode between my client and server application. Is there any manual command line option in Linux to close a port ?? NOTE: I came to know that "only the application which owns the connected socket should close it, which will happen when the application terminates." I dont understand why it is only possible by the application which opens it ... But still eager to know if there is any another way to do it ??

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  • IBM MQ Message Listener

    - by x1a0
    Hi does anyone know how to create a message listener using IBM MQ? I know how to do it using the JMS spec but I am not sure how to do it for IBM MQ. Any links or pointers are greatly appreciated.

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  • Setting up xpra for client use in OS X

    - by Jonathan
    I've been trying to get xpra to run on OS X for the last few days to connect to my Ubuntu server. Note that there's a GUI for it called shifter, but that (at least on OS X) is still far too buggy. For those who don't know what xpra is, if you know what screen is, it's like screen for GUI X Windows apps tunneled over ssh. You can render a remote X app locally so it's faster than sending a series of compresses screen shots (like VNC), but with xpra you can disconnect and reconnect on different computers. To get the basic functionality you can just type "ssh -X server.location" and any GUI app you open from the command line will open locally. I've been able to get xpra to build by doing the following: Download pari-all-0.0.6.tar.gz from the xpra site listed under upstream and untar it. Issue the following Mac Ports command (Dependencies thanks to RogBlog): sudo port install python25 python26 py26-pyrex py26-gtk xorg-libXtst py25-gobject py25-gtk py25-nose py26-nose xorg-libXdamage xorg-libXcomposite xorg-libXtst xorg-libXfixes In the upstream list of v0.0.06 patches (NOT 0.0.8pre!) on the xpra site listed above, download mswindows-conditional-pyrex.patch. Open the patch with your favorite text editor and change the single occurrence of "win" in it to "darwin". Apply the patch to setup.py. Run do-build in the command line. Now where I'm stumped: how do I run xpra? The build produces a sub directory called install/bin in which xpra is located, but when I try to run it I get the following error: Traceback (most recent call last): File "./xpra", line 4, in import xpra.scripts.main ImportError: No module named xpra.scripts.main There is a file called main.py under xpra/scripts, but I don't know any python and I'm not sure if this is what it's looking for, and what to do with it even if it is. My goal is to set up xpra so I can install it into /usr/bin (or some other common path for executables) and execute it whenever I please. What do I do next?

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  • On Windows machines, what is the typical toolchain for remote maintenance?

    - by Hanno Fietz
    I need to deploy PHP and Python code and the appropriate environment (web server, db server) to remote Windows systems, and I don't know what toolchain would be the equivalent to ssh, scp, bash and the like. So, basically, what I need to be able to do is the following: access remote Windows with the appropriate privileges in a secure manner, like I routinely do with ssh (I don't even know whether that would be a text or graphic interface on Windows). remotely install software: Apache or IIS, MySQL or Postgres, Python or PHP copy files from remote (the application we're deploying) remotely configure the machine to run regular tasks (e. g. checking for updates to the application) automate tasks like downloading files from a designated place The main question is probably how I get onto the machine securely in the first place, and then the rest is general Windows admin knowledge, which probably is too broad a scope to fit into one question. I have years of experience with maintaining Linux boxes and I have used tools of varying sophistication on those, ranging from plain scping of PHP files to deployment of Java application containers and even full VMs with Vagrant. On Windows, I'm a complete noob, and I don't even know where to start. I have installed Apache, MySQL , PHP on a desktop machine maybe twice in my life, that's about it. Bonus points for things that work from a Linux machine at my end, but I could run a VM and do everything from there.

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  • Cocoa Core data filename?

    - by RW
    I followed Apple's example for creating a managed object which btw was great... http://developer.apple.com/cocoa/coredatatutorial/index.html However I now want to know what "name" (filename) the user saved his data as. Does anyone know how to pull the filename from the core data object. something like this would be great... NSLog (@"the filename is %@", [coreData filename]); Any ideas?

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  • Theory: Can JIT Compiler be used to parse the whole program first, then execute later?

    - by unknownthreat
    Normally, JIT Compiler works by reads the byte code, translate it into machine code, and execute it. This is what I understand, but in theory, is it possible to make the JIT Compiler parses the whole program first, then execute the program later as machine code? I do not know how JIT Compiler works technically and exactly, so I don't know any feasibility in this case. But theoretically, is it possible? Or am I doing it wrong?

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  • PHP click event handlers.

    - by Guru
    Hello, I'm new to PHP programming and I wanted to know that is it possible to handle PHP events as we do in ASP.NET I mean I've got a img and I want to perform some task on click event of this img. I know how to do it in ASP.NET but please help me in context of PHP Thanks, GURU

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  • sending SMS with VBA

    - by I__
    does anyone know if this is possible? i was able to succesfully run hyperterminal and use it to send texts through my phone which is attached by USB. anyone know how to do it in VBA?

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  • What/Where are the Naming Rules for Controller actions in a Zend_Application App

    - by Alan Storm
    I've created a Zend_Application using the zf tool that's bundled with Zend Framework (1.96, if that matters) What at the rules for formatting action names and how those action names get translated into into URL paths, and where in the Framework codebase does this happen? I ask because I tried to create an action like public function createFooAction() { } and it wouldn't load with a URL like http://example.com/controller/createFoo BUT, the following did work public function createfooAction() { } http://example.com/controller/createfoo I also know non-alphanumeric characters get treated differently, and I'd like to know the base rules I'm dealing with.

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  • Sending the array of arbitrary length through a socket. Endianness.

    - by Negai
    Hi everyone, I'm fighting with socket programming now and I've encountered a problem, which I don't know how to solve in a portable way. The task is simple : I need to send the array of 16 bytes over the network, receive it in a client application and parse it. I know, there are functions like htonl, htons and so one to use with uint16 and uint32. But what should I do with the chunks of data greater than that? Thank you.

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