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Articles indexed Thursday March 18 2010

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  • DataSet gets cleared when displaying crystal report output

    - by Tejas
    hello friends, I am facing one strange but typical problem. In one my form I have DataSet filled up with so much of data which I need to use throughout the form. & I have 1 "print report" button also. When user click on that a report gets displayed. But after I click on that my DataSet gets cleared & so after that bug comes to my form. What to so my DataSet remains filled even after displaying that report output? Pls help me experts...

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  • Extracting images from a PDF

    - by sagar
    My Query I want to extract only images from a PDF document, using Objective-C in an iPhone Application. My Efforts I have gone through the info on this link, which has details regarding different operators on PDF documents. I also studied this document from Apple about PDF parsing with Quartz. I also went through the entire PDF reference document from the Adobe site. According to that document, for each image there are the following operators: q Q BI EI I have created a table to get the image: myTable = CGPDFOperatorTableCreate(); CGPDFOperatorTableSetCallback(myTable, "q", arrayCallback2); CGPDFOperatorTableSetCallback(myTable, "TJ", arrayCallback); CGPDFOperatorTableSetCallback(myTable, "Tj", stringCallback); I use this method to get the image: void arrayCallback2(CGPDFScannerRef inScanner, void *userInfo) { // THIS DOESN'T WORK // CGPDFStreamRef stream; // represents a sequence of bytes // if (CGPDFDictionaryGetStream (d, "BI", &stream)){ // CGPDFDataFormat t=CGPDFDataFormatJPEG2000; // CFDataRef data = CGPDFStreamCopyData (stream, &t); // } } This method is called for the operator "q", but I don't know how to extract an image from it. What should be the solution for extracting the images from the PDF documents? Thanks in advance for your kind help.

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  • where should we place HIDDEN variable in JSP

    - by micheal
    I need to use Hidden variables in my JSP for session tracking. this is the code: <input type="hidden" name="REQ_TOKEN" value="<%=session.getAttribute("SESN_TOKEN").toString()%>" /> i am using this to compare the request token with session token, so only when both are equal i will evaluate that request otherwise i will throw an error. Now the problem is, when i place this code inside <form></form> tags, it is working fine. Unfortunately there are some JSPs in my application where we dont have tag(I know that sounds weird!). where can i place my code so that it will work? Cant i use Hidden variables without FORM tag???

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  • Perl system call

    - by claferri
    I'm a beginner in Perl and I have some trouble using the "system" call. Here is a little piece of code where I try to execute 2 shell commands : # First command is : # dot -Tpng $dottmpfile > $pngfile # Second command is : # rm $dottmpfile if (!($pngfile eq "")) { my @args = ("dot", "-Tpng", $dottmpfile, " > ", $pngfile); system (join (' ' , @args )) or die "system @args failed : $!"; unlink $dottmpfile; } EDIT : Here is my code now, and I still get an error : system dot -Tpng toto.dot > toto.png failed : Inappropriate ioctl for device at /home/claferri/bin/fractal.pl line 79. I've used this to produce this piece of code.

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  • Tag problem c# listbox

    - by Poppy
    Hi i'm trying to use the tag item of a listbox. heres my code. int number = 0; foreach (ListViewItem item in listBox1.Items) { Tag tag = (Tag) item.Tag; saveSlide(showid, tag.photoid, enumber); number++; } problem im havin is when i run the program i get an error message sayin cannot convert type string to system.ListView but i haven't declared item as a string anywher in my program

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  • Call c++ function pointer from c#

    - by Sam
    Is it possible to call a c(++) static function pointer like this typedef int (*MyCppFunc)(void* SomeObject); from c#? void CallFromCSharp(MyCppFunc funcptr, IntPtr param) { funcptr(param); } I need to be able to callback from c# into some old c++ classes. C++ is managed, but the classes are not ref classes (yet). So far I got no idea how to call a c++ function pointer from c#, is it possible?

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  • Business enum to DatContract Enum conversion in WCF

    - by chugh97
    I have an enum namespace Business { public enum Color { Red,Green,Blue } } namespace DataContract { [DataContract] public enum Color { [EnumMember] Red, [EnumMember] Green, [EnumMember] Blue } } I have the same enum as a datacontract in WCF with same values. I need to convert the Business enum to the DataContract enum using a translator. Hoe can I achieve this?

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  • How to detect default printer properties from browser?

    - by Annan
    Regardless of if this is a good idea or not, is it possible to detect printer attributes from the browser? The idea is that you want to print out a brochure that's selling something. Depending on different things such as if the printer is black&white/colour, high/low resolution, laser/inkjet, printing to a file, etc, you want to print out the page differently. For example you might choose different text colours or fonts, different image sizes, etc. My initial thoughts are: ActiveX, Flash, Java, Silverlight, browser plugins. Kudos if it's possible in javascript. I'm interested in all ways to do this, cross browser or not. Please no reasons about why this shouldn't be done ^_^

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  • Self-Configuring Classes W/ Command Line Args: Pattern or Anti-Pattern?

    - by dsimcha
    I've got a program where a lot of classes have really complicated configuration requirements. I've adopted the pattern of decentralizing the configuration and allowing each class to take and parse the command line/configuration file arguments in its c'tor and do whatever it needs with them. (These are very coarse-grained classes that are only instantiated a few times, so there is absolutely no performance issue here.) This avoids having to do shotgun surgery to plumb new options I add through all the levels they need to be passed through. It also avoids having to specify each configuration option in multiple places (where it's parsed and where it's used). What are some advantages/disadvantages of this style of programming? It seems to reduce separation of concerns in that every class is now doing configuration stuff, and to make programs less self-documenting because what parameters a class takes becomes less explicit. OTOH, it seems to increase encapsulation in that it makes each class more self-contained because no other part of the program needs to know exactly what configuration parameters a class might need.

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  • How to set Height of items in XAML so they always occupy the same proportion of available space in p

    - by aoven
    I have an ItemsControl with the following ItemTemplate: <DataTemplate x:Key="myItemTemplate"> <TextBlock Height="???" Text="{Binding Path=Description}" /> </DataTemplate> My question is, how do I set the Height of the TextBlock in the template so that it automatically assumes ItemsControl.Height div ItemsCount amount of vertical space? When there's only one item, I'd like it to be the full height of container, when there're two, each should be half the size, and so on. If possible, I'd prefer to do this completely in XAML to keep my ViewModel clean of UI logic.

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  • Rails3 environment running very slow on Windows XP, Ubuntu 9.04, Ubuntu 9.10

    - by bergyman
    I've tried all three (granted the Ubuntu versions were via VirtualBox with XP as a host, but I gave the images all the available RAM my system has). Loading the rails environment is taking 30-60 seconds. rails console, rake test:units - anything that requires rails to load up. And not just on the first go - every time. I've even used autotest to see if it helps with execution time for unit tests, but it doesn't. Any time I change one test, it still takes 30 seconds to load them, and then about 4 seconds to execute. Has anyone else come across this issue? Has anyone figured out any way to fix this?

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  • Alter Stored Procedure in SQL Replication

    - by Refracted Paladin
    How do I, properly, ALTER a StoredProcedure in a SQL 2005 Merge Replication? I just need to add a Column. I already successfully added it to the Table and I now need to add it to a SP. I did so but now it will not synchronize with the following error -- Insert Error: Column name or number of supplied values does not match table definition. (Source: MSSQLServer, Error number: 213)

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  • KVM and JBoss Java Application Server

    - by Jason
    We have a large Xen deployment running on both RHEL and CentOS and have recently started looking at KVM since this is where it looks like the future of VM's are on Linux. We can load the server and get everything running without an issue. However when we load up a new one with JBoss (4.2 Community edition, Sun JDK 6) and load a large EAR the server goes a little crazy. The %sy will jump to 80-99% and just hang for large periods of time we see a similar jump in %us on the host machine. We though at first this might be I/O as it seems to happen at start of JBoss but then would "cool down" after everything got loaded. We did some tests by extracting some large tar.gz files and using jar -xvf on the ear but could not re-create. Then we starting thinking this might be some type of memory access issues. We loaded a c-program that would generate a lot of memory activity and sure enough we saw the spikes again. Not as high mind you but we did see it jump. We then wrote a small java program to do the same thing and sure enough we saw it jump again. Any thoughts on what might be causing this? Is this just the way KVM works? As a side note we do NOT see this behavior on any other setup. Xen, VMWare and/or native iron. The system does seem a bit slower than our Xen / VMware ones.

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  • Setting up linux based small office network

    - by Miki
    I like to setup a Server and Workstation sort of network in linux (like we have Domain Controller in windows) where all the desktops login where authenicated with server, how this can be done. I prefer CENTOS 5.4 for server and FEDORA 12 for dektop Thanks in advance

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  • SATA drives or chipset throwing DRDY ERR and ICRC ABRT

    - by Matt
    I have an SD-VIA-1A2S PCI card with 2 sata ports (and one ATA-133 that isn't used). Two new Western Digital Caviar Green drives (WD10EARS 1TB) throw repeated errors in kern.log (removed date/time/host info for brevity): [ 7.376475] ata2.00: exception Emask 0x12 SAct 0x0 SErr 0x1000500 action 0x6 [ 7.376480] ata2.00: BMDMA stat 0x5 [ 7.376483] ata2: SError: { UnrecovData Proto TrStaTrns } [ 7.376489] ata2.00: cmd c8/00:40:20:00:00/00:00:00:00:00/e0 tag 0 dma 32768 in [ 7.376490] res 51/84:2f:20:00:00/00:00:00:00:00/e0 Emask 0x12 (ATA bus error) [ 7.376493] ata2.00: status: { DRDY ERR } [ 7.376495] ata2.00: error: { ICRC ABRT } [ 7.376504] ata2: hard resetting link I'm using Ubuntu 9.04 - 2.6.28-18-generic, though I have tried live cds of Ubuntu 9.10, Fedora 12 and OpenSUSE 11.2 - all running various 2.6.31 kernels - and all received the same error. Based on testing these drives and this card in two other machines and combos of connecting the drives directly to the motherboard or the add-in card, I'm relatively convinced that it's the VIA chipset that is the problem. Another computer that also has an onboard VIA SATA chipset (like the add-in card) produces the same errors when the drives are directly on that motherboard. I have been able to verify that the drives are perfectly good, and I tried everything I can think of in terms of swapping cables, psu isn't overloaded, etc. The error happens on boot once or twice, after using fdisk on the drive once or twice, and constantly when attempting to sync a new mdadm raid 1 array created on the two drives. Any thoughts on where to go from here - driver/kernel wise? I'm completely open to buying a new PCI add-in card if someone can recommend one with 2 internal sata ports that works well in Debian/Ubuntu. Thanks!

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  • Mount "Macrium Reflect" on a partition, boot from there ?

    - by b e
    Can Macrium's Reflect recovery CD be mounted/used with GRUB ? If the cd can be 'put' (loaded/mounted/...) in a partition, then the only disc needed would be the actual recovery disc, which could be on an external hard drive, or even on the same machine in another partition, thus allowing on to recover using only what's on the machine itself. I have WXPpro and Xubuntu8.04 double mounted, really happy with them together, use each right now to fix problems with the other when they come up. Also have a partition for the Reflect CD, but I just can't get it to load from Grub, which would be great... Thanks for any thoughts, probably someone has already done this I know !

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  • Do I need more RAM for programming if I switch to a 64 Bit OS?

    - by Buttercup
    Hi, Given that today (for performance reasons?) variables are usually aligned to the "bit-width" (I wanted to use "word-width" here, but on x86 a "word" is still 16 bits right?) of the processor, would switching from a 32 bit OS to its 64 bit version double the RAM usage? Would this then in turn mean that to do the same work a 32 bit OS can do with 4 GB RAM (well, the 3.x GB actually...) with a 64 bit OS I would need 8 GB of RAM for programming? Please note that I'm only talking about everyday x86 computers here.

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  • OS choice between: Debian, gNewSense, and OpenSolaris

    - by penyuan
    I am planning to migrate from Mac OS X and Windows to either a Unix or Linux distribution, i.e. I am a Linux/Unix beginner. Right now the following caught my interest: Debian: Well established with huge repository of 20000+ apps. gNewSence: "Totally free" version of Ubuntu, so it should be more beginner friendly? OpenSolaris: Also open-source, and built on "strong" Unix base. I do mainly basic tasks such as web browsing, office work, maintaining big photo collection, and a little bit of programming. Questions: How "free" are each of these distributions compared to each other, is this whole freedom thing a big deal? Will a binary labeled as for Ubuntu work on gNewSense? What are simple IDEs for Debian and gNewSense?

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