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• Which technique should I use to encrypt/decrypt data in MS Access database file?

  - by HelpNeeder

  I am working on final project for my C# class. My project is a password management program. As I first thought to use just encrypting/decrypting file in AES but my professor pointed out that MS Access database would be much better choice. My question is: how would I encrypt data in database using code I already have? So day I am referring to this article ( gutgames.com/post/AES-Encryption-in-C.aspx ) which works perfect and I can encrypt/decrypt data. Should I use thus code to encrypt ms access file? please post some useful links how would I encrypt my data.

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• Comparing Each Character in Java String

  - by user2760357

  I am a beginner at java, and I am trying to create two strings and compare each character. If there is a matching character or characters, the code has to print out the length of each string, without the matching characters. For example, if one string is "super," and the other is "perfect," the program should interpret the strings as superfect, and print out 9 However, if there is no matching part, like pencil and eraser, the code should printout 12, which is the length of two strings combined. Right now, I am having a problem with comparing each character, since I tried to use if(input_word.compareToIgnoreCase(input_word2) != 0) but it only compared the string as a whole.. any suggestion? Thank you for your efforts

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• iptables, forward traffic for ip not active on the host itself

  - by gucki

  I have kvm guest which's netword card is conntected to the host using a tap device. The tap device is part of a bridge on the host together with eth0 so it can access the public network. So far everything works, the guest can access the public network and it can be accessed from the public network. Now the kvm process on the host provides a vnc server for the guest which listens on 127.0.0.1:5901 on the host. Is there any way to make this vnc server accessible by the ip address which the guest is using (ex. 192.168.0.249), without interrupting the guest from using the same ip (port 5901 is not used by the guest)? It should also work when the guest is not using any ip address at all. So basically I just want to fake IP xx is on the host and only answer/ forward traffic to port 5901 to the host itself. I tried using this NAT rule on the host, but it doesn't work. Ip forwarding is enabled at the host. iptables -t nat -A PREROUTING -p tcp --dst 192.168.0.249 --dport 5901 -j DNAT --to-destination 127.0.0.1:5901 I assume this is because the IP 192.168.0.249 is not not bound to any interfaces and so no ARP requests for it get answered and so no packets for this IP arrive at the host. How can make it work? :)

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• How to resize pdf graphics produced in R using Illustrator

  - by user1648516

  I am making plots in R using the pdf() command. Graphs look perfect and resize nicely in Acrobat Reader. My usual workflow includes manipulating labels etc. in Illustrator, saving as .eps for submission to publishers or inserting in Word. All works fine for single graphs. Now I am trying to combine 4 graphs into one by manually putting them together in an A4 Illustrator document. However, when I resize the standard 7x7 inches pdf graph in Illustrator to fit in one column of an A4 page (ca 3.4 inches wide), all proportions get screwed up, e.g. lines and symbols outlines become way too thick. Using pdf(..., width=3.4, height=3.4) in R messes up all the symbol and font sizes so carefully chosen to produce the original graph. Why can't I resize the graph within Illustrator the same way I can resize the pdf e.g. in Acrobat Reader?

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• How to Get the F# Name of a Module, Function, etc. From Quoted Expression Match

  - by Stephen Swensen

  I continue to work on a printer for F# quoted expressions, it doesn't have to be perfect, but I'd like to see what is possible. The active patterns in Microsoft.FSharp.Quotations.Patterns and Microsoft.FSharp.Quotations.DerivedPatterns used for decomposing quoted expressions will typically provide MemberInfo instances when appropriate, these can be used to obtain the name of a property, function, etc. and their "declaring" type, such as a module or static class. The problem is, I only know how to obtain the CompiledName from these instances but I'd like the F# name. For example, > <@ List.mapi (fun i j -> i+j) [1;2;3] @> |> (function Call(_,mi,_) -> mi.DeclaringType.Name, mi.Name);; val it : string * string = ("ListModule", "MapIndexed") How can this match be rewritten to return ("List", "mapi")? Is it possible?

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• Tunnell network requests with Windows 7

  - by mark

  I've Windows 7 64bit Pro client in a private LAN behind a Netgear wgr614v7 router. I've also a remote Debian server machine outside. I'd like to tunnel all (or specified ports/protocols) over this outside server, so when I'm on the Windows machine and I request serverfault.com it would not appear from the wgr614v7 public IP but from the server. But it's not only about HTTP traffic, it's basically about everything I'd like to: other TCP ports, even UDP, etc. It must be transparent to the application, e.g. they shouldn't be aware of this. All their requests just appear as being from the server and the tunnel between them takes care about the packets. I'm aware of e.g. Putty and forwarding individual ports or using it as a socks proxy, however not many applications to support this and the support in windows itself looks non-existent to me. I might add it should be something "reasonable" easy to set up. I've heard about PPTP but I'm unsure about it's security implications (by design). Should I go for VPN? There seem to be two common solutions for Linux (OpenSwan and StrongSwan), why would I pick the one over the other? I also fear that setting up a VPN might be quite complex, OTOH maybe it's the only sane way to do the things right? Or is OpenVPN sufficient? I'm seeking for open (source) solutions, what other options to I have or which direction should I head to?

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• Android font out of view on small screen

  - by user581949

  Hi Everyone I have several text views that take up the majority of the screen in landscape view in a relativelayout and the font size i have set is quite big (150dp). The text views are all timers and the furthest to the right is the "seconds" textview. My problem is that when testing on a phone with a small screen res the seconds are way outside the limit of the screen and can't be seen. They are in perfect place on normal to large screen resolutions just not on a small screen. Is there any way i can force the "seconds" text view to stay on screen, without adjusting the font size or margins between each text view? Even if it means looking cramped on a small screen i can live with that. Any help is greatly appreciated. Thanks This is the corresponding code:

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• Using TDD: "top down" vs. "bottom up"

  - by Christian Mustica

  Since I'm a TDD newbie, I'm currently developing a tiny C# console application in order to practice (because practice makes perfect, right?). I started by making a simple sketchup of how the application could be organized (class-wise) and started developing all domain classes that I could identify, one by one (test first, of course). In the end, the classes have to be integrated together in order to make the application runnable, i.e. placing necessary code in the Main method which calls the necessary logic. However, I don't see how I can do this last integration step in a "test first" manner. I suppose I wouldn't be having these issues had I used a "top down" approach. The question is: how would I do that? Should I have started by testing the Main() method? If anyone could give me some pointers, it will be much appreciated.

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• Small line-height cross-browser difference

  - by AESM

  So basicly my problem is that the line-heights in Firefox are a little bittle "larger" than in other browsers even though they're all fixed line-heights. For example, you have a block element which has a height from 100px and the line-height is set to 102px. Now, in Firefox the vertical alignment of text is perfect. But in the latest Chrome and Safari 4, the text stands 2px or so higher. Isn't there any way to fix this? Thanks.

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• Sizing Switches for Storage and Production

  - by Untalented

  Couple questions. Should you always completely separate the storage network switches from production switches or are VLANs fine to segment this traffic? Is there a golden rule here? How do you properly size a switch for your environment based on the specifications the manufacturer provide (Throughput, Forwarding Throughput, Stacking Throughput, Max Mac)? If you have two switch options and one has a maximum Mac address of 8,000 vs. another with 16,0000. What does this really mean to me? How do make sure one vs. another is sized properly for me? Besides VLAN and Jumbo Frame support, is there any other "Must" haves for a virtual environments production or storage networks? There is a wealth of knowledge on sizing SANs and such, but this seems equally important and it's quite challenging to find as much information. -- Just to add some tidbits of information for the environment. This setup above is referring to the data centers which supports two different locations which have about 100 users between the two in total. The storage traffic will be iSCSI and will be 3 ESXi Hosts and one SAN housing about 2.7TB of data. Since there is currently no storage network in place (no SAN), I'm having a hard time regarding #2 to really determine what backplane throughput and switch specifications will be sufficient.

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• IPtables and Remote Desktop with Proxy

  - by Sebastian

  So I setup a windows 2008 web server R2 on VirtualBox. Currently using Bridged Network. I can remote desktop to the machine hosting the VM (10.0.0.183) but cannot remote desktop to the VM itself (10.0.0.195). The remote port on the VM set to 5003. VM setup to accept remote connections (windows side). We also use a proxy for our internet, and I added these rules under NAT. (centOS 5) on our proxy box. -A INPUT -p tcp --dport 3389 -j ACCEPT -A REROUTING -i ppp0 -p tcp --dport 3389 -j REDIRECT --to-port 5003 -A FORWARD -d 10.0.0.195 --dport 5003 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT I've been trying for hours and hours and just cannot get it to work. I also used freedns so that we can use a domain name to connect too this VM over the internet. (the DNS points to our external IP address). If we don't get this right we will have to purchase a PPoE from an ISP to connect to this VM remotely, but I know that there is an alternative route if I can just get this port forwarding right!

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• ubuntu 12.04 kvm virtual server network setup, can't get the machine to be connectable

  - by xyious

  I have worked on my Ubuntu Server host for weeks now and I just can not manage to get the virtual machines into the network.... here's what I need to do: I need to be able to create virtual machines that have IP addresses that can be reached from the outside (192.168 network). I need to be able to connect to the virtual machines through ssh, ftp, http and preferably https, anything else doesn't matter that much. So far everything seems simple enough and I have a lot of leeway in terms of IP address range and server/client configuration. I have the option of taking part of a /24 net as most IPs aren't used, and if it's absolutely necessary I have the option of creating a new /24 subnet. Also have the option of reformatting and reinstalling OS on the host and recreating the virtual machines as nothing has been done other than trying to get virtual machines to work. I would prefer if the virtual machines were just part of the normal network which would be 192.168.5.0/24. The host machine has 2 network cards so I don't even necessarily need the Host to be connectable in the same /24 network. I have tried (I think) just about everything from about 5 different tutorials on bridging (giving br0 the same IP that eth0 used to have (Host is able to connect to VM and vice versa, VM doesn't have outside network access), having eth0 set up like it always was and having br0 have a different IP (same as above), NAT with port forwarding (which I would have preferred not to use but will if it works), turning off one of the hosts network cards and just using one of them, different subnets.... etc. I do know my way around iptables fairly well.... Host is 64bit Ubuntu Server 12.04, using libvirt/kvm. edits: Local network is 192.168.5.0/24, host has static ip 192.168.5.254, GW .5.1 which is also nameserver. We have a second Local network at 192.168.10.0/24 with .10.1 GW, but both hosts and VMs were supposed to go into the .5 subnet. The .10 subnet isn't required, but it wouldn't be horrible if the Host were only accessible in the .10 subnet.

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• Delphi: How to localize description for a menu shortcut?

  - by Ulrich Gerhardt

  Is there a way to get a localized description of a shortcut like Ctrl+Z so that I get "Ctrl+Z" if the app runs on an English system and "Strg+Z" on a German system? The VCL function ShortCutToText isn't internationalized. The API function GetKeyNameText is a bit better but still not perfect: If one switches the regional settings of a German XP to English (US), it still produces German texts. Besides the results are in CAPITALS which is ugly. Clarification: I know how I can replace ShortCutToText or the Smkc* resource strings with customized versions. But to use that I need the translated strings. And I would like to get these from the OS (or similar). Update: It looks like Microsoft expects developers to do the translation on their own - see 2. in Associating a Menu Item with an Accelerator Key.

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• UITableViewCell select even doesn't work

  - by saimun

  I had a page control(UIPageControl) on a view (UIViewController) with table view (UITableView) on each page, each page have own table and can go to different view controller. i add the codes in "didSelectRowAtIndexPath" which can go to next level, is works perfect when i test it in a table view by itself, but it doesn't works when i have page controller with it. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:YES]; if (pageNumber == 0) { PicturesViewController *picturesView = [[PicturesViewController alloc] init]; [self.navigationController pushViewController:picturesView animated:YES]; [picturesView release]; } else if (pageNumber == 1) { PictureDetailViewController *pictureDetailView = [[PictureDetailViewController alloc] init]; [self.navigationController pushViewController:pictureDetailView animated:YES]; [pictureDetailView release]; } else if (pageNumber == 2) { MessagesViewController *messagesView = [[MessagesViewController alloc] init]; [self.navigationController pushViewController:messagesView animated:YES]; [messagesView release]; } } here is the code, if view directly to this table view this code is work, how can i make it work under the pagecontrol??

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• Separating data from the UI code with Linq to SQL entities

  - by Sir Psycho

  If it's important to keep data access 'away' from business and presentation layers, what alternatives or approaches can I take so that my LINQ to SQL entities can stay in the data access layer? So far I seem to be simply duplicating the classes produced by sqlmetal, and passing those object around instead simply to keep the two layers appart. For example, I have a table in my DB called Books. If a user is creating a new book via the UI, the Book class generated by sqlmetal seems like a perfect fit although I'm tightly coupling my design by doing so.

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• lexers / parsers for (un) structured text documents

  - by wilson32

  There are lots of parsers and lexers for scripts (i.e. structured computer languages). But I'm looking for one which can break a (almost) non-structured text document into larger sections e.g. chapters, paragraphs, etc. It's relatively easy for a person to identify them: where the Table of Contents, acknowledgements, or where the main body starts and it is possible to build rule based systems to identify some of these (such as paragraphs). I don't expect it to be perfect, but does any one know of such a broad 'block based' lexer / parser? Or could you point me in the direction of literature which may help?

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• addslashes and addcslahes

  - by theband

  I was seeing today the addslashes and addcslashes in php.net, but did not get the point on what is the difference between them and what are the characters escaped in these two. <?php $originaltext = 'This text does NOT contain \\n a new-line!'; $encoded = addcslashes($originaltext, '\\'); $decoded = stripcslashes($encoded); //$decoded now contains a copy of $originaltext with perfect integrity echo $decoded; //Display the sentence with it's literal \n intact ?> If i comment the $decoded variable and echo $encoded, i get the same value which is in the original string. Can anyone clearly explain me the difference and use of these two.

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• SQL compare entire rows

  - by zmaster

  In SQL server 2008 I have some huge tables (200-300+ cols). Every day we run a batch job generating a new table with timestamp appended to the name of the table. The the tables have no PK. I would like a generic way to compare 2 rows from two tables. Showing which cols having different values is sufficient, but showing the values would be perfect. Thanks a lot Thanks for the answers. I ended up writing my own C# tool to do the job - as Im not allowed to install 3rd party software in my company.

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• DNAT from localhost (127.0.0.1)

  - by pts

  I'd like to set up a TCP DNAT from 127.0.0.1, port 4242 to 11.22.33.44, port 5353 on Linux 3.x (currently 3.2.52, but I can upgrade if needed). It looks like the simple DNAT rule setup doesn't work, telnet 127.0.0.1 4242 hangs for a minute in Trying 127.0.0.1..., and then it times out. Maybe it's because the kernel is discarding the returning packets (e.g. SYN+ACK), because it considers them Martian. I don't need an explanation why the simple solution doesn't work, I need a solution, even if it's complicated (e.g. it involves creating may rules). I could set up a usual DNAT from another local IP address, outside the 127.0.0.0/8 network, but now I need 127.0.0.1 as the destination address. I know that I can set up a user-level port forwarding process, but now I need a solution which can be set up using iptables and doesn't need helper processes. I was googling for this for an hour. It was asked multiple times, but I couldn't find any working solutions. Also there are many questions about DNAT to 127.0.0.1, but I don't need that, I need the opposite.

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• Connect from Mac OS X to Windows 7 Desktop

  - by jrn

  I am trying to connect from my MacBook to my Windows 7 machine within my own network - if it will work from outside my network that's a plus but no need to have. My Windows 7 machine is freshly installed with Windows 7 Home Premium. It runs the built-in firewall with no settings changed so far as well as Microsoft Security Essentials. So far I tried CoRD and Microsofts Remote Desktop Connections to connect from my Mac to my Windows machine without any success. I did try and disabled the firewall on my Windows machine but could not connect either. The reason I did this was to check wether there is a Windows firewall setting preventing me from connecting. On top of that I manually started the Remote Desktop Services and Remote Desktop Configuration within services.msc. Is there anything else I have to enable for a remote desktop connection? Could there be any router setting I have to tweak? Since I do not want to connect from outside my own network I thought I don't have to do any port forwarding. The error messages I retrieve are all connection timeouts. I can however ping the hostname and/or IP address. Any help would be greatly appreciated. Thanks a lot, jrn

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• How to control the state of the buttons to be in present based on an event happened in a Silverlight app?

  - by vladc77

  I am trying to avoid building two buttons when I really need one. In my Silverlight app scenarios, I have few grids with a different content and buttons that control the visibility of these grids. I need to be able to show a different visual for a button when its content grid is visible. I can control states such as MouseOver and Pressed and more with visual state manage. However, I am not sure how to achieve this functionality with. I also can place an image on top of the button and switch the visibility of both but it is not perfect for what I need. I am wondering if there is any way to achieve this behavior. Any ideas are highly appreciated!

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• apache front-end rewriting URL to different https ports?

  - by khedron

  Hi all, One of my users is having some trouble with forwarding to an internal web app from a public address. Everything worked fine for him when the situation was like this: front page: http://www.myexample.com/ public ref to internal app: http://www.example.com/app-8903/app.html secretly goes to: http://secret.example.com:8903/app-8903/app.html This is to say, my user is providing the very last URL, with the port information duplicated in the URL base, and they were using that to give a public face that hid both the port and the internal machine name. You could still read the port in the URL base if you looked, but the obvious reference and machine name were hidden. Doing it this way, he could have several different instances of the application running on secret.example.com with different ports, and on the front end it just looked like it was changing the URL directory/base. Now the user wants to do the same thing over https:, and the people helping him with apache config say it can't be done. Is that so? Without being there to tinker with the configuration myself, I'm not sure what his IT people have tried, but reading through the apache2 SSL FAQ and other docs, it seems like it should be possible to rewrite URLs to different ports and still use https:.

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• How do manage the limit of executions to be done by hour (Max: 1000 requests per hour) without a dat

  - by cslavoie

  I am currently developing a script in PHP to fetch webpages. The fact is that by doing so, I occasionally do too much requests to a particular website. In order to control any overflow, I would like to keep trace of how many requests have been done in the last hour or so for each domain. It doesn't need to be perfect, just a good estimate. I doesn't have access to a database, except sqlite2. I would really like something really simple because there will typically be a lot of updates, which is kind of heavy for a sqlite database. If no one has a magical solution, I'll go for sqlite, but I was curious what you can come up with Thank you very much

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• How do i get visual studio like tabs?

  - by Skun

  Hi guys. I've had this thought for a long time in my head now and i've not been able to find the solution to it ! Please help me. I've always loved the visual studio tabs and how they look. They're small and perfect. The normal TabControl, well is -bleh- and boring ! And i've seen these tabs being used in many applications .. so, my Question is this: Is that like a DLL that is available out there that i can link in order to get this control ? For all those who are wondering what tabs i'm talking about, feel free to check out the image below

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• Using Google Voice with an internal SIP Server

  - by BHelman

  Let me be upfront and say first that I am new to the entire details of VoIP. My former understanding was just the extent of Skype. Don't worry, I understand a lot more of it now. The situation is this. I have a Google number that is actually very close to the area in which I live. It's convenient as it is not long distance for everyone. I love its features and etc, but I want it to forward to a VoIP phone, which will be my residential phone. Obviously, Google does not allow forwarding calls to domains (yet). So I use SIPGate with a SIPGate number to forward to a softphone for now. I can configure a VoIP phone to interact with my account easily enough. The problem lies with SIPGate itself really. Google Voice gives free unlimited inbound and outbound calling. SIPGate charges you for outbound. So a VoIP phone would work, but I could never make a call on it (for free). So let's say I setup an Asterisk server, or any other SIP server. What is the best way to go about linking my server to Google Voice? I looked into IPKall but it only specifies inbound calling and not outbound. Or is that just assumed? Does an SIP server handle outbound calling by itself?

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