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  • What to do when 'dpkg --configure -a' fails with too many errors?

    - by rudivonstaden
    During an upgrade from lucid (10.04) to precise (12.04), the X session froze, and I have been trying to recover the upgrade to get a stable system. I have performed the following steps: Used ssh to log in to the stalled system over the network. Checked the contents of the /var/log/dist-upgrade directory. There was no activity on main.log, apt.log or term.log. top showed that process 'precise' was using about 3% CPU, but I could find no evidence that the upgrade process was still doing anything. 'dpkg' did not show up in top, but it came up with pgrep dpkg | xargs ps Killed the 'dpkg' and 'precise' processes Tried to recover the upgrade by running sudo fuser -vki /var/lib/dpkg/lock;sudo dpkg --configure -a. This was partially successful (some packages were configured), but failed with the message Processing was halted because there were too many errors. I ran the same command a few times, and each time some packages were configured but others failed. Tried running sudo apt-get -f install. It fails with similar errors to dpkg. The current situation is that dpkg --configure -a and sudo apt-get -f install fails with two kinds of error: Dependency issues, e.g.: dpkg: dependency problems prevent configuration of cifs-utils: cifs-utils depends on samba-common; however: Package samba-common is not configured yet. dpkg: error processing cifs-utils (--configure): dependency problems - leaving unconfigured Resource conflict, e.g.: debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable Additionally, it seems there's reference to potential boot problems, so I'm not keen to reboot without fixing the install first: dpkg: too many errors, stopping Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.2.0-25-generic cryptsetup: WARNING: failed to detect canonical device of /dev/sda1 cryptsetup: WARNING: could not determine root device from /etc/fstab So my question is, how to get a working install when dpkg --configure -a fails?

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  • My computer will not reboot after fresh install of ubuntu 12.04LTS

    - by user170715
    I bought a new computer yesterday and it came with Windows 8. When installing Ubuntu, i choose the erase and install option thinking that Ubuntu would install easily like it did for my old laptop... After a successful install and following the instructions telling me to reboot to finish installation and remove installation media. It worked and my computer booted fine, however once I began installing updates via update manager and activating additional driver {ATI/AMD proprietary FGLRX graphics driver (post-release updates)} out of the following: Experimental AMD binary Xorg driver and kernel module ATI/AMD proprietary FGLRX graphics driver (*experimental*beta) ATI/AMD proprietary FGLRX graphics driver (post-release updates) Then reboot to finish making changes I reboot and get an error (Reboot and select proper boot device) At this point I was stuck, so I eventually reinstalled ubuntu and repeated the exacted same steps until right before i rebooted to finish making changes. However this time i used this Boot Repair tool sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install -y boot-repair boot-repair After running the program i get a "boot successfully repaired" message. Then I try to reboot again and get the GNU Grub screen where it says would you like to boot: normal recovery memorytest Once it begins loading, you see the code moving across the screen then it pauses when it gets to and doesnt do anything. If someone could tell me how to fix this or get Windows 8 back soon, I'd appreciate it because like i said i just bought it yesterday and now i cant even use it.

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  • System wide Proxy settings when on a windows network with a password

    - by sav
    I'm using Ubuntu on a windows network. I want to connect to the world wide web. I have followed the steps here which I have found very useful. However when I try to ping a website (eg: ping www.wikipedia.org) I get no reply. I can ping local computers on my network, but I need to go through our proxy to get to the world wide web. I can even browse wikipedia using firefox, I just needed to enter the proxy configuration script location and my username and password. I'm quite sure the reason I'm having this trouble is because I havn't entered a username and password. I'm not sure how to do this on a system wide level. ultimately I would like to be able to use package managers like synaptic but first I need them to be able to connect to the internet. EDIT As sugested I created a /etc/apt/apt.conf file like Acquire::http::Proxy "http://chrisav:[email protected]:8080"; Acquire::https::Proxy "https://chrisav:[email protected]:8080"; Acquire::ftp::Proxy "ftp://chrisav:[email protected]:8080"; Acquire::socks::Proxy "socks://chrisav:[email protected]:8080"; However I still cant ping wikipedia when I try installing stuff I get chris@chris-Ubuntu:~$ sudo apt-get install kate Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package kate

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  • Unity on Ubuntu 11.10 - The Dash Home button brings up the panel, but is empty

    - by David M. Coe
    The dash home button brings up a panel that is greyed out, but it is totally empty. It seems to be the very same issue as this: Dash home button brings up blank window which is unanswered. /usr/lib/nux/unity_support_test -p returns OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RV370 OpenGL version string: 2.1 Mesa 7.11 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes I've tried a unity --reset but that doesn't seem to work. Unity seems to reset, but I get the following warning over and over: cs space validation failed unity What should I do next to try and fix this? Edit: Attempted fixes: I've refomatted, did not work. I've done apt-get remove unity then apt-get update then apt-get install unity, did not work. I've switched to Unity 2d and this seems to work. How can I get regualar Unity working or atleast find the error?

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  • install android sdk on kubuntu

    - by dot
    I'm trying to follow the instructions for installing the android sdk found here: http://developer.android.com/sdk/installing/adding-packages.html After i've unpackaged and i run the android program under tools, I don't get all the options that I'm supposed to. The only 2 folders that show up are tools, and extras. Under tools, it only shows the "Android SDK Tools" with the status "Installed". Under the "extas" folder, I have nothing. I've made sure that my http: proxy settings are correct. And I've checked the logs. there are no errors. According to the android developer site, I'm supposed to install the SDK platform tools. has anyone tried this on ubuntu? I also checked and saw others were instructed to do an apt-get install ia32-libs but it failed for me. Besides which, I am running the 32bit os... so I don't think i would need to install that... ?? I've also tried following the instructions found here: http://forums.team-nocturnal.com/showthread.php/772 But... I can't seem to add the personal archive nilarimogard without getting an error message. when i attempt: sudo add-apt-repository ppa:nilarimogard/webupd8 I get the message: Traceback (most recent call last): File "/usr/bin/add-apt-repository", line 125, in ppa_info = get_ppa_info_from_lp(user, ppa_name) File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 80, in get_ppa_info_from_lp curl.perform() pycurl.error: (7, "couldn't connect to host") root@jll:/home/me/Documents# any suggestions? Thanks.

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  • Installation causing broken packages

    - by AWE
    Here I come I am so determined to use Ubuntu that I paid a professional to install it for me (dualboot). When I got it I got a lot of things from the software center. Skype did not have a download button so I googled it and Ubuntu help told me to do this: sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner" and then this: sudo apt-get update && sudo apt-get install skype The terminal told me "that this is potentially harmful..." but I thought it was Ubuntu language meaning "are you sure?" Now items cannot be installed or removed until the package catalog is repaired, so I want to repair it but the package operation fails. "sudo aptitude -f install" - command not found Synaptic package manager tells me that I have two broken packages, libc6 and libc6-dev but doesn't help, only makes life complicated. What the *#$%&!!! I don't want to be forced to become a computer scientist just to be able to use a free source os. P.s. the sound stopped working

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  • How to ensure nvidia_current module loads during boot

    - by Aras
    I am running Ubuntu 12.10 on an Asus G75V laptop with nvidia gforce GTX 660M. I first run 12.04 on this machine and was able to install nvidia_current drivers from swat ppa: sudo apt-add-repository ppa:ubuntu-x-swat/x-updates sudo apt-get update sudo apt-get install nvidia-current This worked in 12.04 and after rebooting the machine my graphics where working properly. After upgrade to 12.10 however, the machine boots into a low resolution desktop which I can not really interact with. I suspect this is due to the driver not being loaded properly. To fix this, I have to switch to ctrl+alt+F1 session and manually load the nvidia_current module and restart the desktop manager: sudo modprobe nvidia_current sudo service lightdm restart Now everything works fine again. However, I would like not to have to do this every time I reboot the machine. I also dont want to hack an script to do this on load. Basically, if things are setup currectly, the nvidia_current driver which is installed should load. How can I make sure nvidia_current driver module loads properly when system starts?

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  • Setting up multiple cores for apache solr for Ubuntu 12.04 and Drupal 7

    - by chrisjlee
    I'm setting up solr locally for my development purposes and integration with Drupal 7. I'm not very familiar with tomcat. My background has primarily been LAMP setups. So I went and installed the package provided by ubuntu for apache solr following this guide. sudo apt-get install tomcat6 tomcat6-admin tomcat6-common tomcat6-user tomcat6-docs tomcat6-examples sudo apt-get install solr-tomcat I've got that working. The apt-get package manager does a great job and allows me to setup solr but with one core. What steps need to be taken to enable multi core setup for apache solr? And below is my solr.xml file: sudo nano /var/lib/tomcat6/conf/Catalina/localhost/solr.xml <!-- Context configuration file for the Solr Web App --> <Context path="/solr" docBase="/usr/share/solr" debug="0" privileged="true" allowLinking="true" crossContext="true"> <!-- make symlinks work in Tomcat --> <Resources className="org.apache.naming.resources.FileDirContext" allowLinking="true" /> <Environment name="solr/home" type="java.lang.String" value="/usr/share/solr" override="true" /> </Context>

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  • alsa - sound issues on ubuntu 12.04

    - by tam_ubuuser
    i am having an sony E series laptop.i have an HDMI port .at this stage ,i have tested my sound card , which provides audio out on my laptop i.e i could hear songs .my laptop has two sound cards amd 5450 and an intel-hda(alsamixer shows that as s/pdif) . i decided to connect HDMI output to my new HD-TV.but, i could get only visuals on my TV,NO AUDIO OUTPUT ( HDMI cable works fine with win 7).my laptop has two sound cards.but i couldn't switch output to other card.( i don't know ,how to do that) i decided to update alsa. complied the following code in terminal. sudo apt-add-repository ppa:ubuntu-audio-dev/alsa-daily sudo apt-get update sudo apt-get install alsa-hda-dkms then,strangely no login sound, and no audio output on my laptop at all .then, started complied code from step1 sound troubleshooting procedure from offical ubuntu site.then, my speaker icon taskbar disappeared .obivously $aplay -l ,provided output as no soundcards detected . so , i implemented step 4 from that guide, it provides a output of all hardware devices in my laptop. *-multimedia UNCLAIMED description: Audio device product: Cedar HDMI Audio [Radeon HD 5400/6300 Series] vendor: Hynix Semiconductor (Hyundai Electronics) physical id: 0.1 bus info: pci@0000:01:00.1 version: 00 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi bus_master cap_list configuration: latency=0 resources: memory:f0040000-f0043fff *-multimedia UNCLAIMED description: Audio device product: 5 Series/3400 Series Chipset High Definition Audio vendor: Intel Corporation physical id: 1b bus info: pci@0000:00:1b.0 version: 05 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:f5e00000-f5e03fff that command displayed output name of the two cards . but , still i have no positive output on $aplay -l. so therfore, i think alsa couldn't detect my sound cards . is there solution to this problem? it could be better,if alsa would channel output from multiple sound cards ? how should install and configure alsa such that detects HDMI cable as soon i connect to my HD tv? is it possible to alsa and pluseaudio 2.0 to co-exist, if so how?

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  • Never before had a problem with Ubuntu desktop graphical display; Trying to use nvidia GT630

    - by focaccio
    I've been using ubuntu since 9.04 and never had a problem with Ubuntu brining up the desktop graphical user interface. However I am currently not able to see anything graphical past the install screens. I have an Intel DP55KG motherboard and just installed an nvidia gt630 graphics card (zotac), since the old graphics card failed. I can install the server and see text. So I do a apt-get install ubuntu-desktop...or apt-get install kubuntu-desktop...or apt-get install xubuntu desktop, but after the reboot there is no display...its like something is hung up. I tried using the Live quantal dvd and I do see the graphical prompt to try without installing, but after that the screen goes blank. I've tried two monitors and the same thing happens. There is a faint "glow" on the screen and I do not get a "no input signal" from the monitor, so something is happening. I can install an old OEM of XP so I know the video card and motherboard are at least semi functional. Any help is appreciated. Thanks, Greg

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  • No monitor output after fresh install of 11.10 64-bit

    - by James
    I have a machine with a Nvidia 8600GT graphics card and a CRT monitor. Previously, I have only used Windows on it, and the graphics card seems to be working correctly in Windows 7. I booted up and installed Ubuntu 11.10 amd64 from the LiveCD and the whole process worked perfectly. When I tried to boot off the hard disk for the first time, the output to the monitor switched off during the splash screen, and this happens consistently. I can ctrl-alt-f2, so I tried an apt-get upgrade, which didn't help; nor did apt-get install nvidia-current. There is nothing that looks relevant in dmesg. Booting with the nomodeset option has no effect. Following the answers in this similar thread, I tried apt-get purge nvidia-173. Both startx and service lightdm start just say the service is already running. Does anyone know how to find out what the problem is? I was wondering if it is just that Ubuntu is trying to use a resolution that the monitor doesn't support, but I can't find out how to change that from the command line.

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  • Grub menu not waiting despite of GRUB_TIMEOUT=10

    - by Optimus
    I have Ubuntu 12.04 installed along side of windows 7. The grub menu doesn't seem obey GRUB_TIMEOUT=10, I see the grub menu there for a split second and it immediately defaults to the first option. Grub menu worked fine when I first installed ubuntu. I am not able to pinpoint what exactly broke it(maybe some update?). I did resize my ubuntu partition using gparted but am not sure if that is what caused it. here are my settings from etc/default/grub GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 #GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" How do I fix this? Edit: As suggested by 'kamil' this is what I have tried so far with no luck - 1) hold the shift key while booting 2) sudo gedit /etc/default/grub edit GRUB_TIMEOUT to `GRUB_TIMEOUT=10` sudo update-grub 3) sudo gedit /etc/default/grub edit GRUB_TIMEOUT to `GRUB_TIMEOUT=10` sudo update-grub2 4) at the end of your /etc/grub.d/00_header file, comment out the if condition except for the regular set timeout line like this: #if [ \${recordfail} = 1 ]; then # set timeout=-1 #else set timeout=${GRUB_TIMEOUT} #fi then sudo update-grub and sudo update-grub2 5) install boot repair sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install -y boot-repair boot-repair boot-repair output - Boot successfully repaired. ... The boot files of [The OS now in use - Ubuntu 12.04.1 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, 200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. (https://help.ubuntu.com/community/BootPartition) http://paste.ubuntu.com/1220468/ - here is the full boot-repair data Could grub files not being at the start of the disk create such issues?

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  • How to remove all associated files and configuration settings of an app installed through 'force architecture' command

    - by Mysterio
    A few weeks ago I installed a 32 bit .deb file through the 'force architecture' command (on my 64bit notebook), however the procedure was unsuccessful and I used the apt-get purgecommand to uninstall the app. It seems there are some leftovers of the app I uninstalled which has now broken system update. Synaptic recommended a sudo apt-get install -fwhich I did in the terminal with this initial response: Reading package lists... Done Building dependency tree Reading state information... Done The following package was automatically installed and is no longer required: libntfs10 Use 'apt-get autoremove' to remove them. The following packages will be REMOVED: crossplatformui 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? I chose 'Y' then got this response: (Reading database ... 187616 files and directories currently installed.) Removing crossplatformui ... ztemtvcdromd: no process found dpkg: error processing crossplatformui (--remove): subprocess installed post-removal script returned error exit status 1 Errors were encountered while processing: crossplatformui E: Sub-process /usr/bin/dpkg returned an error code (1) It seems the app I installed crossplatformuiis still on my system and has caused update manager to stop running with a partial upgrade warning. What do I do now?

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  • Update get's stuck unpacking bad package, won't continue without it

    - by Shazzner
    Removing the package from cache, and disabling Recommended Updates in Software Sources gives me an error saying I need to install this package. I've tried to update several times, but it keeps hanging on unpacking the ubuntu-sso-client package. Which forces me to hard-reset to unlock the package manager. I've tried: sudo dpkg --configure -a No errors sudo apt-get upgrade --fix-broken Wants me to reinstall said package, resulting in it hanging Removing the package: sudo rm -f /var/cache/apt/archives/ubuntu-sso-client_1.0.8-0ubuntu1_all.deb Results in the same effect, it re-downloads then hangs I can de-select Recommended Updates but I get error messages when I try to update again: E: The package ubuntu-sso-client needs to be reinstalled, but I can't find an archive for it. Which won't let me continue Finally re-enabling the source, I try to remove ubuntu-sso sudo apt-get remove ubuntu-sso-client It removes a bunch of other packages but complains about the package: dpkg: error processing ubuntu-sso-client (--remove): Package is in a very bad inconsistent state - you should reinstall it before attempting a removal. Reinstalling ubuntu-sso-client hangs :( I'm at my wits end, any ideas? I would be nice to install all the other updates but this one is preventing it.

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  • When trying to install Wine on 12.10, 'Sudo' command will not let me type in a password.

    - by Nocturnus
    As the title explains, I have been attempting to install Wine on my laptop which is running 12.10. When I access the command terminal and entered "sudo add-apt-repository ppa:ubuntu-wine/ppa" I was of course met by a password block, when I attempted to enter my password, it flat out wouldn't let me type anything, the only key that got a response from the terminal was "enter" which was met by "incorrect password". To bypass this issue I backed out and used the 'Gksudo' command, this new dialogue box seemed to give me access to sudo commands. I then entered "sudo apt-get update" and "sudo apt-get install wine1.5". Up until the installation everything went fine, but after entering the final command (still using gksudo) The terminal read "the following packages have unmet dependencies" and proceeded to list a bunch of "recommends" So my guess is that Wine hasn't been updated to run on 12.10... Is this true, and is there any other way to open .exe's? Also what was with that funky password misshap? I'm totally new to Ubuntu so I've just been using support pages and tutorials, sorry if I'm a bit naive in these matters...

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  • Which programming language should I choose I want to build this website ...? [closed]

    - by Goma
    Assuming that I will start with just phot sharing website. Every user can add comments to any photo. After that the site will contain news (general news), the admin can add any news and the moderators as well while the users can also add comments on this news. The website will aslo provide photos uploader, so every user will have up to 20 MB ti upload any photos they want. Other users can see these photos or can not depending on the option that the main user chose(if he wants to publish his photos or not). The site should have a small type of forum which provide the ability for admin to ad categories and for user to add topics and replies for each topic in these categoris. These are the things that I can think of now, but the website will add other features as well and services later on. Can you tell me now which programming language can help me to do all that? I need a programming language that provdies the follwing: 1- speed load for pages of the site. 2- easy to add more functions quickly and easy to edit code for any reason. 3- Secure 4- fast in displaying infromation from database.

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  • Issue with Banshee

    - by Jordan March
    I went to install Banshee using Ubuntu tweak's App button. I clicked the stable ppa, and installed. When it was done, i tried to launch it, it shows up for a split second then closes. So I though it might be having issues with Rhythmbox's associations or something. So I uninstalled Rhythmbox. But same issue. So I try to uninstall Banshee, and it won't, it fails. I thought, well maybe if I tried installing it from the terminal, adding the ppa first (sudo add-apt-repository ppa:banshee-team/ppa) updating apt-get, then sudo apt-get install banshee. But it fails. So now I can't run it, uninstall it, re install it.. or anything. I'm new to linux so I don't know how to go about rebuilding the files. But if anyone has seen this issue before, or has any idea on how to fix this, I would really appreciate the help. Thanks guys

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  • Oneric Aspire One. After latest 11.10 update to Linux 3.0.0-9 boot hangs at staement "Starting Bluetooth"

    - by hevh
    I have today updated the version of Linux on Ubuntu on my Acer Aspire One. The boot hangs on the statement "Starting Bluetooth". Help please!! EDIT1: I get the grub menu when I start the netbook and it doesn´t matter which version of linux I choose the resulkt is the same. It gets as far as the Ubuntu spash screen then drops into command line mode then hangs on the line "Starting Bluetooth". I can log in and have tried various forms of the apt-get command to fix the system but with no result. I do not need bluetooth at the moment and so could remove the application if I knew how. (have tried apt-get remove bluez). When I use the command sudo apt-get -f install I get an error message saying "There's not enough space in /var/lib/mysql/" folowed by several other error messages. I have spent some time looking for similar problems and solutions using google but so far got to nothing to help. Thanks EDIT2: I have since discovered when running Knoppix or slitaz from a usb stick that the file managers report the hard disc as having no space. However GPARTED reports it as having 3.69gb. I do recall making space on the hard drive by deleting some old files and emptying trash whilst the update was running; perhaps its related. Any suggestions for how I can recover the apparently lost space from hard disc without losing the data. I have backups of the actual data but do not wnat to lose the applcations configuration. Thanks Kev

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  • dist-upgrade broke my insatll HELP

    - by diefuchsjagden
    so I ran apt-get update; apt-get dist-upgrade the upgrade failed and I lost the gui, I have an encrypted /home drive. When I run apt-get * (any command) I have all kinds of errors mostly missing depends and thats because apparently my network stack is gone. I have no NIC if I run ifconfig. It doesn't even show up with lspci If I were to do a "clean" install of 10.04 LTS which is what I had on my on my build, will I lose all my data? BTW I was just using Ubuntu's default encryption to manage the encryption using my PSWD as the key so if I were to use the same user name and PSWD would my data be accessible? I can see my data from command line, when or if Xorg does start it just loads a basic window with nothing but a black X in the middle of the screen which I can only assume is my mouse cursor but it doesn't move! Reddit /r/linux had some ideas none of which worked was, no help. And apparently /r/ubuntu is full of jerks because all they did was ridicule me. If I can get my install back I probably will be switching back to either Slackware or Gentoo. The Ubuntu forums were of no help they had the same suggestion as /r/linux. I am about to just run my back up script to my back up drives and nuke everything else but I'd rather not.

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  • Problem installing wine on Ubuntu 12.10

    - by akhumaini
    I am having problem when installing wine on ubuntu 12.10 I tried to following some tutorial but none of them work. **root@ubuntu:~# add-apt-repository ppa:ubuntu-wine/ppa** **root@ubuntu:~# apt-get update** **root@ubuntu:~# apt-get install wine1.5** Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wine1.5 : Depends: wine1.5-i386 (= 1.5.16-0ubuntu1) but it is not installable Recommends: ttf-droid Recommends: ttf-mscorefonts-installer but it is not going to be installed Recommends: ttf-umefont but it is not going to be installed Recommends: ttf-unfonts-core but it is not going to be installed Recommends: winbind but it is not going to be installed Recommends: winetricks but it is not going to be installed E: Unable to correct problems, you have held broken packages. root@ubuntu:~# Anyone can help me how to solve th problem ?

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  • ASP.NET SQLMembership Provider not logging in

    - by cfdev9
    My web app uses the sql memebership provider. Running it locally all is well, deploying to a dev server it works fine too in firefox, but in IE8 something unexpected is happening. Once a user logs in they're supposed to be redirected to home.aspx. What's happening when I attempt to login is it appears to accept the login credentials but then doesn't redirect to home.aspx. Instead it just redirects me to the login page as though I had attempted to access home.aspx directly without being logged in. The url parameter ReturnUrl is appended, Login.aspx?ReturnUrl=%2fhome.aspx Why is this only happening with IE8? My local PC is IIS7 but the server is IIS6. Using the same web.config Full code behind public partial class Login : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Session.Abandon(); FormsAuthentication.SignOut(); } } protected void btnSubmit_Click(object sender, EventArgs e) { if (Membership.ValidateUser(tbUsername.Text, tbPassword.Text)) { if (Request.QueryString["ReturnUrl"] != null) { FormsAuthentication.RedirectFromLoginPage(tbUsername.Text, false); } else { FormsAuthentication.SetAuthCookie(tbUsername.Text, false); Response.Redirect("~/Home.aspx"); } } } } Full web.config <?xml version="1.0"?> <configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <appSettings/> <connectionStrings> <add name="ASPNET_DB" connectionString="..."/> </connectionStrings> <system.web> <membership defaultProvider="SqlMembershipProvider"> <providers> <add name="SqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="ASPNET_DB" enablePasswordRetrieval="true" enablePasswordReset="true" requiresQuestionAndAnswer="false" applicationName="/" requiresUniqueEmail="false" passwordFormat="Clear" maxInvalidPasswordAttempts="5" passwordAttemptWindow="10" passwordStrengthRegularExpression="" minRequiredPasswordLength="1" minRequiredNonalphanumericCharacters="0"/> </providers> </membership> <roleManager enabled="true" defaultProvider="SqlRoleManager"> <providers> <add name="SqlRoleManager" type="System.Web.Security.SqlRoleProvider" connectionStringName="ASPNET_DB" applicationName="/"/> </providers> </roleManager> <authentication mode="Forms"> <forms name="CHOUSE.ASPXAUTH" loginUrl="login.aspx" protection="All" path="/"/> </authentication> <authorization> <allow roles="AccountManager"/> <allow roles="Client"/> <deny users="*"/> </authorization> <compilation debug="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> </assemblies> </compilation> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </controls> </pages> <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpModules> </system.web> <location path="Admin"> <system.web> <authorization> <allow roles="AccountManager"/> <deny users="*"/> </authorization> </system.web> </location> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="WarnAsError" value="false"/> </compiler> </compilers> </system.codedom> <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <remove name="ScriptModule"/> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <remove name="ScriptHandlerFactory"/> <remove name="ScriptHandlerFactoryAppServices"/> <remove name="ScriptResource"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </handlers> </system.webServer> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> </assemblyBinding> </runtime>

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  • Using JSON.NET for dynamic JSON parsing

    - by Rick Strahl
    With the release of ASP.NET Web API as part of .NET 4.5 and MVC 4.0, JSON.NET has effectively pushed out the .NET native serializers to become the default serializer for Web API. JSON.NET is vastly more flexible than the built in DataContractJsonSerializer or the older JavaScript serializer. The DataContractSerializer in particular has been very problematic in the past because it can't deal with untyped objects for serialization - like values of type object, or anonymous types which are quite common these days. The JavaScript Serializer that came before it actually does support non-typed objects for serialization but it can't do anything with untyped data coming in from JavaScript and it's overall model of extensibility was pretty limited (JavaScript Serializer is what MVC uses for JSON responses). JSON.NET provides a robust JSON serializer that has both high level and low level components, supports binary JSON, JSON contracts, Xml to JSON conversion, LINQ to JSON and many, many more features than either of the built in serializers. ASP.NET Web API now uses JSON.NET as its default serializer and is now pulled in as a NuGet dependency into Web API projects, which is great. Dynamic JSON Parsing One of the features that I think is getting ever more important is the ability to serialize and deserialize arbitrary JSON content dynamically - that is without mapping the JSON captured directly into a .NET type as DataContractSerializer or the JavaScript Serializers do. Sometimes it isn't possible to map types due to the differences in languages (think collections, dictionaries etc), and other times you simply don't have the structures in place or don't want to create them to actually import the data. If this topic sounds familiar - you're right! I wrote about dynamic JSON parsing a few months back before JSON.NET was added to Web API and when Web API and the System.Net HttpClient libraries included the System.Json classes like JsonObject and JsonArray. With the inclusion of JSON.NET in Web API these classes are now obsolete and didn't ship with Web API or the client libraries. I re-linked my original post to this one. In this post I'll discus JToken, JObject and JArray which are the dynamic JSON objects that make it very easy to create and retrieve JSON content on the fly without underlying types. Why Dynamic JSON? So, why Dynamic JSON parsing rather than strongly typed parsing? Since applications are interacting more and more with third party services it becomes ever more important to have easy access to those services with easy JSON parsing. Sometimes it just makes lot of sense to pull just a small amount of data out of large JSON document received from a service, because the third party service isn't directly related to your application's logic most of the time - and it makes little sense to map the entire service structure in your application. For example, recently I worked with the Google Maps Places API to return information about businesses close to me (or rather the app's) location. The Google API returns a ton of information that my application had no interest in - all I needed was few values out of the data. Dynamic JSON parsing makes it possible to map this data, without having to map the entire API to a C# data structure. Instead I could pull out the three or four values I needed from the API and directly store it on my business entities that needed to receive the data - no need to map the entire Maps API structure. Getting JSON.NET The easiest way to use JSON.NET is to grab it via NuGet and add it as a reference to your project. You can add it to your project with: PM> Install-Package Newtonsoft.Json From the Package Manager Console or by using Manage NuGet Packages in your project References. As mentioned if you're using ASP.NET Web API or MVC 4 JSON.NET will be automatically added to your project. Alternately you can also go to the CodePlex site and download the latest version including source code: http://json.codeplex.com/ Creating JSON on the fly with JObject and JArray Let's start with creating some JSON on the fly. It's super easy to create a dynamic object structure with any of the JToken derived JSON.NET objects. The most common JToken derived classes you are likely to use are JObject and JArray. JToken implements IDynamicMetaProvider and so uses the dynamic  keyword extensively to make it intuitive to create object structures and turn them into JSON via dynamic object syntax. Here's an example of creating a music album structure with child songs using JObject for the base object and songs and JArray for the actual collection of songs:[TestMethod] public void JObjectOutputTest() { // strong typed instance var jsonObject = new JObject(); // you can explicitly add values here using class interface jsonObject.Add("Entered", DateTime.Now); // or cast to dynamic to dynamically add/read properties dynamic album = jsonObject; album.AlbumName = "Dirty Deeds Done Dirt Cheap"; album.Artist = "AC/DC"; album.YearReleased = 1976; album.Songs = new JArray() as dynamic; dynamic song = new JObject(); song.SongName = "Dirty Deeds Done Dirt Cheap"; song.SongLength = "4:11"; album.Songs.Add(song); song = new JObject(); song.SongName = "Love at First Feel"; song.SongLength = "3:10"; album.Songs.Add(song); Console.WriteLine(album.ToString()); } This produces a complete JSON structure: { "Entered": "2012-08-18T13:26:37.7137482-10:00", "AlbumName": "Dirty Deeds Done Dirt Cheap", "Artist": "AC/DC", "YearReleased": 1976, "Songs": [ { "SongName": "Dirty Deeds Done Dirt Cheap", "SongLength": "4:11" }, { "SongName": "Love at First Feel", "SongLength": "3:10" } ] } Notice that JSON.NET does a nice job formatting the JSON, so it's easy to read and paste into blog posts :-). JSON.NET includes a bunch of configuration options that control how JSON is generated. Typically the defaults are just fine, but you can override with the JsonSettings object for most operations. The important thing about this code is that there's no explicit type used for holding the values to serialize to JSON. Rather the JSON.NET objects are the containers that receive the data as I build up my JSON structure dynamically, simply by adding properties. This means this code can be entirely driven at runtime without compile time restraints of structure for the JSON output. Here I use JObject to create a album 'object' and immediately cast it to dynamic. JObject() is kind of similar in behavior to ExpandoObject in that it allows you to add properties by simply assigning to them. Internally, JObject values are stored in pseudo collections of key value pairs that are exposed as properties through the IDynamicMetaObject interface exposed in JSON.NET's JToken base class. For objects the syntax is very clean - you add simple typed values as properties. For objects and arrays you have to explicitly create new JObject or JArray, cast them to dynamic and then add properties and items to them. Always remember though these values are dynamic - which means no Intellisense and no compiler type checking. It's up to you to ensure that the names and values you create are accessed consistently and without typos in your code. Note that you can also access the JObject instance directly (not as dynamic) and get access to the underlying JObject type. This means you can assign properties by string, which can be useful for fully data driven JSON generation from other structures. Below you can see both styles of access next to each other:// strong type instance var jsonObject = new JObject(); // you can explicitly add values here jsonObject.Add("Entered", DateTime.Now); // expando style instance you can just 'use' properties dynamic album = jsonObject; album.AlbumName = "Dirty Deeds Done Dirt Cheap"; JContainer (the base class for JObject and JArray) is a collection so you can also iterate over the properties at runtime easily:foreach (var item in jsonObject) { Console.WriteLine(item.Key + " " + item.Value.ToString()); } The functionality of the JSON objects are very similar to .NET's ExpandObject and if you used it before, you're already familiar with how the dynamic interfaces to the JSON objects works. Importing JSON with JObject.Parse() and JArray.Parse() The JValue structure supports importing JSON via the Parse() and Load() methods which can read JSON data from a string or various streams respectively. Essentially JValue includes the core JSON parsing to turn a JSON string into a collection of JsonValue objects that can be then referenced using familiar dynamic object syntax. Here's a simple example:public void JValueParsingTest() { var jsonString = @"{""Name"":""Rick"",""Company"":""West Wind"", ""Entered"":""2012-03-16T00:03:33.245-10:00""}"; dynamic json = JValue.Parse(jsonString); // values require casting string name = json.Name; string company = json.Company; DateTime entered = json.Entered; Assert.AreEqual(name, "Rick"); Assert.AreEqual(company, "West Wind"); } The JSON string represents an object with three properties which is parsed into a JObject class and cast to dynamic. Once cast to dynamic I can then go ahead and access the object using familiar object syntax. Note that the actual values - json.Name, json.Company, json.Entered - are actually of type JToken and I have to cast them to their appropriate types first before I can do type comparisons as in the Asserts at the end of the test method. This is required because of the way that dynamic types work which can't determine the type based on the method signature of the Assert.AreEqual(object,object) method. I have to either assign the dynamic value to a variable as I did above, or explicitly cast ( (string) json.Name) in the actual method call. The JSON structure can be much more complex than this simple example. Here's another example of an array of albums serialized to JSON and then parsed through with JsonValue():[TestMethod] public void JsonArrayParsingTest() { var jsonString = @"[ { ""Id"": ""b3ec4e5c"", ""AlbumName"": ""Dirty Deeds Done Dirt Cheap"", ""Artist"": ""AC/DC"", ""YearReleased"": 1976, ""Entered"": ""2012-03-16T00:13:12.2810521-10:00"", ""AlbumImageUrl"": ""http://ecx.images-amazon.com/images/I/61kTaH-uZBL._AA115_.jpg"", ""AmazonUrl"": ""http://www.amazon.com/gp/product/…ASIN=B00008BXJ4"", ""Songs"": [ { ""AlbumId"": ""b3ec4e5c"", ""SongName"": ""Dirty Deeds Done Dirt Cheap"", ""SongLength"": ""4:11"" }, { ""AlbumId"": ""b3ec4e5c"", ""SongName"": ""Love at First Feel"", ""SongLength"": ""3:10"" }, { ""AlbumId"": ""b3ec4e5c"", ""SongName"": ""Big Balls"", ""SongLength"": ""2:38"" } ] }, { ""Id"": ""7b919432"", ""AlbumName"": ""End of the Silence"", ""Artist"": ""Henry Rollins Band"", ""YearReleased"": 1992, ""Entered"": ""2012-03-16T00:13:12.2800521-10:00"", ""AlbumImageUrl"": ""http://ecx.images-amazon.com/images/I/51FO3rb1tuL._SL160_AA160_.jpg"", ""AmazonUrl"": ""http://www.amazon.com/End-Silence-Rollins-Band/dp/B0000040OX/ref=sr_1_5?ie=UTF8&qid=1302232195&sr=8-5"", ""Songs"": [ { ""AlbumId"": ""7b919432"", ""SongName"": ""Low Self Opinion"", ""SongLength"": ""5:24"" }, { ""AlbumId"": ""7b919432"", ""SongName"": ""Grip"", ""SongLength"": ""4:51"" } ] } ]"; JArray jsonVal = JArray.Parse(jsonString) as JArray; dynamic albums = jsonVal; foreach (dynamic album in albums) { Console.WriteLine(album.AlbumName + " (" + album.YearReleased.ToString() + ")"); foreach (dynamic song in album.Songs) { Console.WriteLine("\t" + song.SongName); } } Console.WriteLine(albums[0].AlbumName); Console.WriteLine(albums[0].Songs[1].SongName); } JObject and JArray in ASP.NET Web API Of course these types also work in ASP.NET Web API controller methods. If you want you can accept parameters using these object or return them back to the server. The following contrived example receives dynamic JSON input, and then creates a new dynamic JSON object and returns it based on data from the first:[HttpPost] public JObject PostAlbumJObject(JObject jAlbum) { // dynamic input from inbound JSON dynamic album = jAlbum; // create a new JSON object to write out dynamic newAlbum = new JObject(); // Create properties on the new instance // with values from the first newAlbum.AlbumName = album.AlbumName + " New"; newAlbum.NewProperty = "something new"; newAlbum.Songs = new JArray(); foreach (dynamic song in album.Songs) { song.SongName = song.SongName + " New"; newAlbum.Songs.Add(song); } return newAlbum; } The raw POST request to the server looks something like this: POST http://localhost/aspnetwebapi/samples/PostAlbumJObject HTTP/1.1User-Agent: FiddlerContent-type: application/jsonHost: localhostContent-Length: 88 {AlbumName: "Dirty Deeds",Songs:[ { SongName: "Problem Child"},{ SongName: "Squealer"}]} and the output that comes back looks like this: {  "AlbumName": "Dirty Deeds New",  "NewProperty": "something new",  "Songs": [    {      "SongName": "Problem Child New"    },    {      "SongName": "Squealer New"    }  ]} The original values are echoed back with something extra appended to demonstrate that we're working with a new object. When you receive or return a JObject, JValue, JToken or JArray instance in a Web API method, Web API ignores normal content negotiation and assumes your content is going to be received and returned as JSON, so effectively the parameter and result type explicitly determines the input and output format which is nice. Dynamic to Strong Type Mapping You can also map JObject and JArray instances to a strongly typed object, so you can mix dynamic and static typing in the same piece of code. Using the 2 Album jsonString shown earlier, the code below takes an array of albums and picks out only a single album and casts that album to a static Album instance.[TestMethod] public void JsonParseToStrongTypeTest() { JArray albums = JArray.Parse(jsonString) as JArray; // pick out one album JObject jalbum = albums[0] as JObject; // Copy to a static Album instance Album album = jalbum.ToObject<Album>(); Assert.IsNotNull(album); Assert.AreEqual(album.AlbumName,jalbum.Value<string>("AlbumName")); Assert.IsTrue(album.Songs.Count > 0); } This is pretty damn useful for the scenario I mentioned earlier - you can read a large chunk of JSON and dynamically walk the property hierarchy down to the item you want to access, and then either access the specific item dynamically (as shown earlier) or map a part of the JSON to a strongly typed object. That's very powerful if you think about it - it leaves you in total control to decide what's dynamic and what's static. Strongly typed JSON Parsing With all this talk of dynamic let's not forget that JSON.NET of course also does strongly typed serialization which is drop dead easy. Here's a simple example on how to serialize and deserialize an object with JSON.NET:[TestMethod] public void StronglyTypedSerializationTest() { // Demonstrate deserialization from a raw string var album = new Album() { AlbumName = "Dirty Deeds Done Dirt Cheap", Artist = "AC/DC", Entered = DateTime.Now, YearReleased = 1976, Songs = new List<Song>() { new Song() { SongName = "Dirty Deeds Done Dirt Cheap", SongLength = "4:11" }, new Song() { SongName = "Love at First Feel", SongLength = "3:10" } } }; // serialize to string string json2 = JsonConvert.SerializeObject(album,Formatting.Indented); Console.WriteLine(json2); // make sure we can serialize back var album2 = JsonConvert.DeserializeObject<Album>(json2); Assert.IsNotNull(album2); Assert.IsTrue(album2.AlbumName == "Dirty Deeds Done Dirt Cheap"); Assert.IsTrue(album2.Songs.Count == 2); } JsonConvert is a high level static class that wraps lower level functionality, but you can also use the JsonSerializer class, which allows you to serialize/parse to and from streams. It's a little more work, but gives you a bit more control. The functionality available is easy to discover with Intellisense, and that's good because there's not a lot in the way of documentation that's actually useful. Summary JSON.NET is a pretty complete JSON implementation with lots of different choices for JSON parsing from dynamic parsing to static serialization, to complex querying of JSON objects using LINQ. It's good to see this open source library getting integrated into .NET, and pushing out the old and tired stock .NET parsers so that we finally have a bit more flexibility - and extensibility - in our JSON parsing. Good to go! Resources Sample Test Project http://json.codeplex.com/© Rick Strahl, West Wind Technologies, 2005-2012Posted in .NET  Web Api  AJAX   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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  • URL Rewrite – Protocol (http/https) in the Action

    - by OWScott
    IIS URL Rewrite supports server variables for pretty much every part of the URL and http header. However, there is one commonly used server variable that isn’t readily available.  That’s the protocol—HTTP or HTTPS. You can easily check if a page request uses HTTP or HTTPS, but that only works in the conditions part of the rule.  There isn’t a variable available to dynamically set the protocol in the action part of the rule.  What I wish is that there would be a variable like {HTTP_PROTOCOL} which would have a value of ‘HTTP’ or ‘HTTPS’.  There is a server variable called {HTTPS}, but the values of ‘on’ and ‘off’ aren’t practical in the action.  You can also use {SERVER_PORT} or {SERVER_PORT_SECURE}, but again, they aren’t useful in the action. Let me illustrate.  The following rule will redirect traffic for http(s)://localtest.me/ to http://www.localtest.me/. <rule name="Redirect to www"> <match url="(.*)" /> <conditions> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> </conditions> <action type="Redirect" url="http://www.localtest.me/{R:1}" /> </rule> The problem is that it forces the request to HTTP even if the original request was for HTTPS. Interestingly enough, I planned to blog about this topic this week when I noticed in my twitter feed yesterday that Jeff Graves, a former colleague of mine, just wrote an excellent blog post about this very topic.  He beat me to the punch by just a couple days.  However, I figured I would still write my blog post on this topic.  While his solution is a excellent one, I personally handle this another way most of the time.  Plus, it’s a commonly asked question that isn’t documented well enough on the web yet, so having another article on the web won’t hurt. I can think of four different ways to handle this, and depending on your situation you may lean towards any of the four.  Don’t let the choices overwhelm you though.  Let’s keep it simple, Option 1 is what I use most of the time, Option 2 is what Jeff proposed and is the safest option, and Option 3 and Option 4 need only be considered if you have a more unique situation.  All four options will work for most situations. Option 1 – CACHE_URL, single rule There is a server variable that has the protocol in it; {CACHE_URL}.  This server variable contains the entire URL string (e.g. http://www.localtest.me:80/info.aspx?id=5)  All we need to do is extract the HTTP or HTTPS and we’ll be set. This tends to be my preferred way to handle this situation. Indeed, Jeff did briefly mention this in his blog post: … you could use a condition on the CACHE_URL variable and a back reference in the rewritten URL. The problem there is that you then need to match all of the conditions which could be a problem if your rule depends on a logical “or” match for conditions. Thus the problem.  If you have multiple conditions set to “Match Any” rather than “Match All” then this option won’t work.  However, I find that 95% of all rules that I write use “Match All” and therefore, being the lazy administrator that I am I like this simple solution that only requires adding a single condition to a rule.  The caveat is that if you use “Match Any” then you must consider one of the next two options. Enough with the preamble.  Here’s how it works.  Add a condition that checks for {CACHE_URL} with a pattern of “^(.+)://” like so: How you have a back-reference to the part before the ://, which is our treasured HTTP or HTTPS.  In URL Rewrite 2.0 or greater you can check the “Track capture groups across conditions”, make that condition the first condition, and you have yourself a back-reference of {C:1}. The “Redirect to www” example with support for maintaining the protocol, will become: <rule name="Redirect to www" stopProcessing="true"> <match url="(.*)" /> <conditions trackAllCaptures="true"> <add input="{CACHE_URL}" pattern="^(.+)://" /> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> </conditions> <action type="Redirect" url="{C:1}://www.localtest.me/{R:1}" /> </rule> It’s not as easy as it would be if Microsoft gave us a built-in {HTTP_PROTOCOL} variable, but it’s pretty close. I also like this option since I often create rule examples for other people and this type of rule is portable since it’s self-contained within a single rule. Option 2 – Using a Rewrite Map For a safer rule that works for both “Match Any” and “Match All” situations, you can use the Rewrite Map solution that Jeff proposed.  It’s a perfectly good solution with the only drawback being the ever so slight extra effort to set it up since you need to create a rewrite map before you create the rule.  In other words, if you choose to use this as your sole method of handling the protocol, you’ll be safe. After you create a Rewrite Map called MapProtocol, you can use “{MapProtocol:{HTTPS}}” for the protocol within any rule action.  Following is an example using a Rewrite Map. <rewrite> <rules> <rule name="Redirect to www" stopProcessing="true"> <match url="(.*)" /> <conditions trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> </conditions> <action type="Redirect" url="{MapProtocol:{HTTPS}}://www.localtest.me/{R:1}" /> </rule> </rules> <rewriteMaps> <rewriteMap name="MapProtocol"> <add key="on" value="https" /> <add key="off" value="http" /> </rewriteMap> </rewriteMaps> </rewrite> Option 3 – CACHE_URL, Multi-rule If you have many rules that will use the protocol, you can create your own server variable which can be used in subsequent rules. This option is no easier to set up than Option 2 above, but you can use it if you prefer the easier to remember syntax of {HTTP_PROTOCOL} vs. {MapProtocol:{HTTPS}}. The potential issue with this rule is that if you don’t have access to the server level (e.g. in a shared environment) then you cannot set server variables without permission. First, create a rule and place it at the top of the set of rules.  You can create this at the server, site or subfolder level.  However, if you create it at the site or subfolder level then the HTTP_PROTOCOL server variable needs to be approved at the server level.  This can be achieved in IIS Manager by navigating to URL Rewrite at the server level, clicking on “View Server Variables” from the Actions pane, and added HTTP_PROTOCOL. If you create the rule at the server level then this step is not necessary.  Following is an example of the first rule to create the HTTP_PROTOCOL and then a rule that uses it.  The Create HTTP_PROTOCOL rule only needs to be created once on the server. <rule name="Create HTTP_PROTOCOL"> <match url=".*" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{CACHE_URL}" pattern="^(.+)://" /> </conditions> <serverVariables> <set name="HTTP_PROTOCOL" value="{C:1}" /> </serverVariables> <action type="None" /> </rule>   <rule name="Redirect to www" stopProcessing="true"> <match url="(.*)" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> </conditions> <action type="Redirect" url="{HTTP_PROTOCOL}://www.localtest.me/{R:1}" /> </rule> Option 4 – Multi-rule Just to be complete I’ll include an example of how to achieve the same thing with multiple rules. I don’t see any reason to use it over the previous examples, but I’ll include an example anyway.  Note that it will only work with the “Match All” setting for the conditions. <rule name="Redirect to www - http" stopProcessing="true"> <match url="(.*)" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> <add input="{HTTPS}" pattern="off" /> </conditions> <action type="Redirect" url="http://www.localtest.me/{R:1}" /> </rule> <rule name="Redirect to www - https" stopProcessing="true"> <match url="(.*)" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{HTTP_HOST}" pattern="^localtest\.me$" /> <add input="{HTTPS}" pattern="on" /> </conditions> <action type="Redirect" url="https://www.localtest.me/{R:1}" /> </rule> Conclusion Above are four working examples of methods to call the protocol (HTTP or HTTPS) from the action of a URL Rewrite rule.  You can use whichever method you most prefer.  I’ve listed them in the order that I favor them, although I could see some people preferring Option 2 as their first choice.  In any of the cases, hopefully you can use this as a reference for when you need to use the protocol in the rule’s action when writing your URL Rewrite rules. Further information: Viewing all Server Variable for a site. URL Parts available to URL Rewrite Rules Further URL Rewrite articles

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  • Entity Framework 4.3.1 Code based Migrations and Connector/Net 6.6

    - by GABMARTINEZ
     Code-based migrations is a new feature as part of the Connector/Net support for Entity Framework 4.3.1. In this tutorial we'll see how we can use it so we can keep track of the changes done to our database creating a new application using the code first approach. If you don't have a clear idea about how code first works we highly recommend you to check this subject before going further with this tutorial. Creating our Model and Database with Code First  From VS 2010  1. Create a new console application 2.  Add the latest Entity Framework official package using Package Manager Console (Tools Menu, then Library Package Manager -> Package Manager Console). In the Package Manager Console we have to type  Install-Package EntityFramework This will add the latest version of this library.  We will also need to make some changes to your config file. A <configSections> was added which contains the version you have from EntityFramework.  An <entityFramework> section was also added where you can set up some initialization. This section is optional and by default is generated to use SQL Express. Since we don't need it for now (we'll see more about it below) let's leave this section empty as shown below. 3. Create a new Model with a simple entity. 4. Enable Migrations to generate the our Configuration class. In the Package Manager Console we have to type  Enable-Migrations; This will make some changes in our application. It will create a new folder called Migrations where all the migrations representing the changes we do to our model.  It will also create a Configuration class that we'll be using to initialize our SQL Generator and some other values like if we want to enable Automatic Migrations.  You can see that it already has the name of our DbContext. You can also create you Configuration class manually. 5. Specify our Model Provider. We need to specify in our Class Configuration that we'll be using MySQLClient since this is not part of the generated code. Also please make sure you have added the MySql.Data and the MySql.Data.Entity references to your project. using MySql.Data.Entity;   // Add the MySQL.Data.Entity namespace public Configuration() { this.AutomaticMigrationsEnabled = false; SetSqlGenerator("MySql.Data.MySqlClient", new MySql.Data.Entity.MySqlMigrationSqlGenerator());    // This will add our MySQLClient as SQL Generator } 6. Add our Data Provider and set up our connection string <connectionStrings> <add name="PersonalContext" connectionString="server=localhost;User Id=root;database=Personal;" providerName="MySql.Data.MySqlClient" /> </connectionStrings> <system.data> <DbProviderFactories> <remove invariant="MySql.Data.MySqlClient" /> <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.6.2.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" /> </DbProviderFactories> </system.data> * The version recommended to use of Connector/Net is 6.6.2 or earlier. At this point we can create our database and then start working with Migrations. So let's do some data access so our database get's created. You can run your application and you'll get your database Personal as specified in our config file. Add our first migration Migrations are a great resource as we can have a record for all the changes done and will generate the MySQL statements required to apply these changes to the database. Let's add a new property to our Person class public string Email { get; set; } If you try to run your application it will throw an exception saying  The model backing the 'PersonelContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269). So as suggested let's add our first migration for this change. In the Package Manager Console let's type Add-Migration AddEmailColumn Now we have the corresponding class which generate the necessary operations to update our database. namespace MigrationsFromScratch.Migrations { using System.Data.Entity.Migrations; public partial class AddEmailColumn : DbMigration { public override void Up(){ AddColumn("People", "Email", c => c.String(unicode: false)); } public override void Down() { DropColumn("People", "Email"); } } } In the Package Manager Console let's type Update-Database Now you can check your database to see all changes were succesfully applied. Now let's add a second change and generate our second migration public class Person   {       [Key]       public int PersonId { get; set;}       public string Name { get; set; }       public string Address {get; set;}       public string Email { get; set; }       public List<Skill> Skills { get; set; }   }   public class Skill   {     [Key]     public int SkillId { get; set; }     public string Description { get; set; }   }   public class PersonelContext : DbContext   {     public DbSet<Person> Persons { get; set; }     public DbSet<Skill> Skills { get; set; }   } If you would like to customize any part of this code you can do that at this step. You can see there is the up method which can update your database and the down that can revert the changes done. If you customize any code you should make sure to customize in both methods. Now let's apply this change. Update-database -verbose I added the verbose flag so you can see all the SQL generated statements to be run. Downgrading changes So far we have always upgraded to the latest migration, but there may be times when you want downgrade to a specific migration. Let's say we want to return to the status we have before our last migration. We can use the -TargetMigration option to specify the migration we'd like to return. Also you can use the -verbose flag. If you like to go  back to the Initial state you can do: Update-Database -TargetMigration:$InitialDatabase  or equivalent: Update-Database -TargetMigration:0  Migrations doesn't allow by default a migration that would ocurr in a data loss. One case when you can got this message is for example in a DropColumn operation. You can override this configuration by setting AutomaticMigrationDataLossAllowed to true in the configuration class. Also you can set your Database Initializer in case you want that these Migrations can be applied automatically and you don't have to go all the way through creating a migration and updating later the changes. Let's see how. Database Initialization by Code We can specify an initialization strategy by using Database.SetInitializer (http://msdn.microsoft.com/en-us/library/gg679461(v=vs.103)). One of the strategies that I found very useful when you are at a development stage (I mean not for production) is the MigrateDatabaseToLatestVersion. This strategy will make all the necessary migrations each time there is a change in our model that needs a database replication, this also implies that we have to enable AutomaticMigrationsEnabled flag in our Configuration class. public Configuration()         {             AutomaticMigrationsEnabled = true;             AutomaticMigrationDataLossAllowed = true;             SetSqlGenerator("MySql.Data.MySqlClient", new MySql.Data.Entity.MySqlMigrationSqlGenerator());    // This will add our MySQLClient as SQL Generator          } In the new EntityFramework section of your Config file we can set this at a context level basis.  The syntax is as follows: <contexts> <context type="Custom DbContext name, Assembly name"> <databaseInitializer type="System.Data.Entity.MigrateDatabaseToLatestVersion`2[[ Custom DbContext name, Assembly name],  [Configuration class name, Assembly name]],  EntityFramework" /> </context> </contexts> In our example this would be: The syntax is kind of odd but very convenient. This way all changes will always be applied when we do any data access in our application. There are a lot of new things to explore in EF 4.3.1 and Migrations so we'll continue writing some more posts about it. Please let us know if you have any questions or comments, also please check our forums here where we keep answering questions in general for the community.  Hope you found this information useful. Happy MySQL/.Net Coding! 

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  • Error Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException [migrated]

    - by user134212
    I'm new here. I'm learning how to program on java and I have a problem with my code. I really have no clue why my code is not working. I think my mistake may be here, but I'm not quite sure. m3 = new Matriz(ren2,col2); btSumar.addActionListener(new ActionListener() { Matriz m3;//(ren2,col2); public void actionPerformed(ActionEvent e) { m3 = new Matriz(ren2,col2); if(ventanaAbierta==true) { try { crearMat.SUMA(m1,m2); } catch(Exception nul) { System.out.println(nul); } } else { JOptionPane.showMessageDialog(null,"Ya se realizo la suma"); } } }); My Complete code import java.awt.*; import javax.swing.*; import javax.swing.BorderFactory; import javax.swing.border.Border; import java.awt.event.*; import java.awt.*; import java.io.*; import java.util.*; public class Practica2 { private int opcion,ren2,col2; private JFrame ventana,ventanaPrintMatriz; private JPanel panel,panel2; private Border borderRed2,borderBlue2,borderGreen2,borderGreen4; private Color red,green,blue,white,black; private Font Verdana14,ArialBlack18; private JLabel labelTitulo; public JButton btSalir,btSumar,btRestar,btMultiplica,btTranspuesta,btCrear; private ImageIcon suma,resta,multi,crear,salir,trans; private boolean ventanaAbierta = false; private static ValidacionesMatrices valida; private static Operaciones operacion; private static Matriz m1,m2,m3; private static ImprimirMatriz printMat; public Practica2() { panel = new JPanel(); panel.setLayout(null); ventana = new JFrame("Operaciones con Matrices"); ventana.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { //Sale del programa System.exit(0); } }); ventana.setContentPane(panel); ventana.setVisible(true); ventana.setResizable(false); ventana.setBounds(150,150,300,380); //ventana.setBounds(0,0,650,650); } public void inicializarComponentes() { panel2 = new JPanel(); panel2.setLayout(null); labelTitulo = new JLabel("Practica #2"); suma = new ImageIcon("suma1.png"); resta = new ImageIcon("resta1.png"); multi = new ImageIcon("multi1.png"); trans = new ImageIcon("trans2.png"); crear = new ImageIcon("crear1.png"); salir = new ImageIcon("salir1.png"); btTranspuesta = new JButton("Transpuesta",trans); btMultiplica = new JButton("Multiplica",multi); btRestar = new JButton("Restar",resta); btSumar = new JButton("Sumar",suma); btCrear = new JButton("Crear",crear); btSalir = new JButton("Salir",salir); //Tipo de letra ArialBlack18 = new Font("Arial Black",Font.BOLD,18); //Color green = new Color(0,255,0); //Formato labelTitulo labelTitulo.setBounds(80,-60,200,150); labelTitulo.setFont(ArialBlack18); labelTitulo.setForeground(blue); labelTitulo.setVisible(true); //Formato de CrearMatriz btCrear.setBounds(80,50,130,30); btCrear.setToolTipText("Crea una matriz"); //Formato de Muliplica btMultiplica.setBounds(80,100,130,30); btMultiplica.setToolTipText("Mat[A] * Mat[B]"); //Formato de botonRestar btRestar.setBounds(80,150,130,30); btRestar.setToolTipText("Mat[A] - Mat[B]"); //Formato del botonSumar btSumar.setBounds(80,200,130,30); btSumar.setToolTipText("Mat[A] + Mat[B]"); //Formato de Transpuesta btTranspuesta.setBounds(80,250,130,30); btTranspuesta.setToolTipText("Mat[A]^-1"); //Formato del botonSalir btSalir.setBounds(80,300,130,30); //Agregando componentes al panel1 panel2.add(labelTitulo); panel2.add(btMultiplica); panel2.add(btCrear); panel2.add(btRestar); panel2.add(btSumar); panel2.add(btSalir); panel2.add(btTranspuesta); //Formato panel2 panel2.setBackground(green); panel2.setVisible(true); panel2.setBounds(0,0,300,380); //Argregamos componentes al panelPrincipal= panel.add(panel2); //BotonCrear btCrear.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) //throws IOException { if(ventanaAbierta==false) { ventanaAbierta=true; new CrearMatriz(); } else { JOptionPane.showMessageDialog(null,"Ya se crearon las Matrices"); } } }); m3 = new Matriz(ren2,col2); btSumar.addActionListener(new ActionListener() { Matriz m3;//(ren2,col2); public void actionPerformed(ActionEvent e) { m3 = new Matriz(ren2,col2); if(ventanaAbierta==true) { try { crearMat.SUMA(m1,m2); } catch(Exception nul) { System.out.println(nul); } } else { JOptionPane.showMessageDialog(null,"Ya se realizo la suma"); } } }); //BotonSalir btSalir.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } }); panel.setVisible(true); panel.setBounds(0,0,350,380); } class VentanaMatriz { private JFrame ventana; private JPanel panel; private JTextArea textArea1,textArea2; private JLabel mat1,mat2; private JTextField textField1; public VentanaMatriz() { panel = new JPanel(); panel.setLayout(null); ventana = new JFrame("Creacion de Matrices"); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { ventana.dispose(); } }); ventana.setContentPane(panel); ventana.setVisible(true); ventana.setResizable(false); ventana.setBounds(200,100,850,420); } public void inicializarComponentes() { //Colores black = new Color(0,0,0); white = new Color(255,255,255); blue = new Color(0,0,255); green = new Color(0,255,0); red = new Color(255,0,0); //Tipo de letra Verdana14 = new Font("Verdana",Font.BOLD,14); //Tipos de borde borderRed2 = BorderFactory.createLineBorder(red,2); borderBlue2 = BorderFactory.createLineBorder(blue,2); borderGreen2 = BorderFactory.createLineBorder(green,2); borderGreen4 = BorderFactory.createLineBorder(green,4); //Agregando componentes al panel1 panel.add(mat1); panel.add(textArea1); panel.add(mat2); panel.add(textArea2); //Formato panel2 panel.setBackground(blue); panel.setVisible(true); panel.setBounds(0,0,850,420); } } class CrearMatriz { public int col1,re1,ren2,col2; public Matriz m1,m2,m3; public CrearMatriz() { int col1,ren1,ren2,col2; ren2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Renglones Matriz A: ")); col2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Columnas Matriz A: ")); final Matriz m1= new Matriz(ren2,col2); ren2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Renglones Matriz B: ")); col2 = Integer.parseInt(JOptionPane.showInputDialog("Numero de Columnas Matriz B: ")); final Matriz m2= new Matriz(ren2,col2); m3 = new Matriz(ren2,col2); m1.llenarMatriz(); m2.llenarMatriz(); m1.printMat(); m2.printMat(); } public void SUMA(Matriz m1,Matriz m2) { Matriz m3; if(ventanaAbierta==false) { m3 = new Matriz(ren2,col2); if(valida.validaSumayResta(m1,m2)) { m3 = operacion.sumaMat(m1,m2); JOptionPane.showMessageDialog(null,"La suma es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la suma"); } } } public void RESTA() { } //btSumar = new JButton("Sumar",suma); //BotonSumar //Mostrar matriz 1 y 2 // System.out.println("\n\n\nMatriz 1="); // m1.imprimeMatriz(); // System.out.println("\nMatriz 2="); //Poner en botones /* if(valida.validaSumayResta(m1,m2)) { m3 = operacion.sumaMat(m1,m2); JOptionPane.showMessageDialog(null,"La suma es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la suma"); } if(valida.validaSumayResta(m1,m2)) { m3=operacion.restaMat(m1,m2); JOptionPane.showMessageDialog(null,"La resta es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la resta"); } if(valida.validaMultiplicacion(m1,m2)){ m3=operacion.multiplicaMat(m1,m2); JOptionPane.showMessageDialog(null,"La multiplicacion es = "); m3.imprimeMatriz(); } else { JOptionPane.showMessageDialog(null,"No es posible hacer la multiplicacion"); } JOptionPane.showMessageDialog(null,"La multiplicacion es = "); m1=operacion.transpuesta(m1); m2=operacion.transpuesta(m2); */ } class Matriz { public JTextField matriz; //public JTextArea texto; private JFrame ventanaPrintMatriz; private JPanel panel2; int ren; int col; int pos[][]; public Matriz(int ren1, int col1) { ren = ren1; col = col1; pos = new int [ren][col];/*una matriz de enteros de renglon por columan*/ } public void llenarMatriz() { for(int i=0;i<ren;i++) for(int j=0;j<col;j++) pos[i][j]=(int) (Math.random()*10);/*la posicion i y j crea un entero random*/ } /*vuelve a recorrer los espacio de i y j*/ } //Esta clase era un metodo de CrearMatriz class ImprimirMatriz { public void ImprimirMatriz() { panel2 = new JPanel(); panel2.setLayout(null); ventanaPrintMatriz = new JFrame("Matriz"); ventana.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { //Practica2.ventanaAbierta=false; ventana.dispose(); } }); int i,j; int x=0,y=0; borderRed2 = BorderFactory.createLineBorder(red,2); white = new Color(255,255,255); red = new Color(255,0,0); black = new Color(0,0,0); blue = new Color(0,0,255); for(i=0;i<ren;i++) { for(j=0;j<col;j++) { matriz = new JTextField(" "+pos[i][j]); matriz.setBorder(borderRed2); matriz.setForeground(white); matriz.setBounds(x+25,y+25,25,25); matriz.setBackground(black); matriz.setEditable(false); matriz.setVisible(true); //Se incrementa la coordenada en X //para el siguiente Textfield no se encime x=x+35; //Agregamos el textField al panel panel2.add(matriz); } //Regreso las cordenadas de X a 0 para que el //siguiente renglon empieze en donde mismo x=0; //Incremento las coordenada Y para que se brinque //de linea y=y+35; } //Formato panel2 panel2.setBounds(150,150,350,380); panel2.setBackground(blue); //panel2.setEditable(false); panel2.setVisible(true); //Formato de Ventana ventanaPrintMatriz.setContentPane(panel2); ventanaPrintMatriz.setBounds(150,150,350,380); ventanaPrintMatriz.setResizable(false); ventanaPrintMatriz.setVisible(true); } } class Operaciones { public Matriz sumaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m1.col); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[i][j]+m2.pos[i][j]; return m3; } public Matriz restaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m1.col); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[i][j]-m2.pos[i][j]; return m3; } public Matriz multiplicaMat(Matriz m1, Matriz m2) { Matriz m3; m3 = new Matriz(m1.ren, m2.col); for(int i=0;i<m1.ren;i++) for(int j=0;j<m2.col;j++) { m3.pos[i][j]=0; for(int k=0;k<m1.col;k++) m3.pos[i][j]+=(m1.pos[i][k]*m2.pos[k][j]); } return m3; } public Matriz transpuesta(Matriz m1) { Matriz m3=new Matriz(m1.col,m1.ren); for(int i=0;i<m1.col;i++) for(int j=0;j<m1.ren;j++) m3.pos[i][j]=m1.pos[j][i]; return m3; } } class ValidacionesMatrices { public boolean validaSumayResta(Matriz m1, Matriz m2) { if((m1.ren==m2.ren) && (m1.col==m2.col)) return true; else return false; } public boolean validaMultiplicacion(Matriz m1, Matriz m2) { if(((m1.ren==m2.ren) && (m1.col==m2.col)) || (m1.col==m2.ren)) return true; else return false; } } public static void main(String[] args) { Practica2 practica2 = new Practica2(); practica2.inicializarComponentes(); } } Exc

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