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  • Tutorials for .NET database app using SQLite

    - by ChrisC
    I have some MS Access experience, and had a class on console c++ apps, now I am trying to develop my first program. It's a little C# db app. I have the db tables and columns planned and keyed into VS, but that's where I'm stuck. I'm needing C#/VS tutorials that will guide me on configuring relationships, datatyping, etc, on the db so I can get it ready for testing of the schema. The only tutorials I've been able to find either talk about general db basics (ie, not helping me with VS/C#), or about C# communications with an existing SQL db. Thank you. (In case it matters, I'm using the open source System.Data.SQLite (sqlite.phxsoftware.com) for the db. I chose it over SQL Server CE after seeing a comparison between the two. Also I wanted a server-less version of SQL because this little app will be on other people's computers and I want to to do as little support as possible.)

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  • How to use the Rhino javascript engine in an applet

    - by Robber
    For my java program I'm using Rhino to execute JS scripts. Now I'm trying to convert it to an applet which works great, except that everytime it's calling evaluateString(...) the JVM throws an AccessControlException. After some (a lot) of research I found out that this is caused by Rhino's custom classloader. My problem is that after hours of googling I still can't find a way to stop Rhino from trying to load it's own classloader. I hope someone can help me...

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  • Handling Junk Email with Apple Mail.app and Gmail

    - by Axeva
    I've just setup my Apple Mail client to work with Google Apps through IMAP. One lingering question is how to best handle SPAM (Junk Mail), however. In their Help section, Google recommends that we disable junk filtering on the client. http://mail.google.com/support/bin/answer.py?answer=78892 This leads me to wonder what we should do when a junk message makes it past Google's filter? Do I just delete the message? If I do, the Google spam filter will never improve and "learn" that the message was junk. Do I have to log in to the web interface at Google to mark the message as spam? That seems a bit arduous for every spam email I get. What's the best way to handle this? Thanks!

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  • Simple recursive DNS resolver for debugging (app or VM)

    - by notpeter
    I have an issue which I believe is caused by incorrect DNS queries (doubled subdomains like _record.host.subdomain.tld.subdomain.tld) when querying for SRV records. So I need to an alternate DNS server with heavy logging so I can see every query (especially stupid ones), acting as a recursive resolver with the ability create records which override real DNS records so I can not only find the records it's (wrongly) looking for, but populate those records as well. I know I could install a DNS server on yet another linux box, but I feel like this is the sort of thing that someone may already setup a simple python script or single use vm just for this purpose.

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  • Knowledge base web app -- need a demo mode

    - by Smandoli
    I was contracted to build an on-line knowledge base that searches and cross-references many thousands of replacement parts for a niche industry. My client furnishes this app to his customers on a subscription basis. It uses MySQL and PHP and it works great. I want to deploy it in "demo mode" to sell my skills. I want the user to see the functions, but I have to guard the data for my client. My first idea was to obfuscate the results. That's at cross-purposes with showing how well it searches. I'm considering a limit on how many searches you can perform, but that's awkward too as someone could visit every day and get more answers than we would prefer. Other posts I've found are about letting people interact with an app, but without the challenge of protecting a big knowledge base. Can you suggest an approach? (Note, I put the tag obfuscation, but not sure it applies because java code obfuscation seems to be unrelated.)

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  • How to use V8's built in functions

    - by Victor jiang
    I'm new in both javascript and V8. According to Google's Embedder's Guide, I saw something in the context section talking about built-in utility javascript functions. And I also found some .js files(e.g. math.js) in the downloaded source code, so I tried to write a simple program to call functions in these files, but I failed. Does a context created by Persistent<Context> context = Context::New() have any built-in js functions? How can I access them? Is there a way to first import existing js files as a library(something like src="xxx" type="text/javascript" in HTML page) and then run my own execute script? Can I call google maps api through the embedded V8 library in app? How?

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  • Installing Win32 shared SxS policy via WiX 3.0 MSM fails for 2nd app

    - by dr-stevep
    I am attempting to author a merge module for use by multiple application installers to install a Win32 Shared SxS Assembly and its associated Policy. I'm using WiX 3.0 to generate the MSM and test MSIs. So far it works fine for the first app installer that runs … but the second app installer fails because the Policy file already exists (HRESULT: 0x800700B7). What requirement(s) for correct Win32 Shared SxS Policy installation am I missing? I have submitted WiX bug 3005301 for this (https://sourceforge.net/tracker/?func=detail&atid=642714&aid=3005301&group_id=105970) and posted VS2008 projects that reproduce the problem. URL: ftp.digital-rapids.com/upload/SteveP/ User: drc-support Password: drc-support Link: ftp://drc-support:[email protected]/upload/SteveP/ wix-Bugs-3005201.rar contains a VS2008 solution that builds the MSM and MSIs that reproduce the issue. (~3MB) wix-Bugs-3005301_Output.rar contains the generated MSM, MSI, and wixpdb files (~40MB)

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  • Opera Mobile, offline web app development, and memory

    - by Jake Krohn
    I'm developing a data collection app for use on a HP iPAQ 211. I'm doing it as an offline web app (go with what you know) using Opera Mobile 9.7 and Google Gears. Being it is an offline app, it is very dependent on Javascript for much of its behavior. I'm using the LocalServer, Database, and Geolocation components of Gears, as well as the JQuery core and a couple of plugins for form validation and other usability tweaks (no jQuery UI). I've tried to be conservative with my programming style and free up or close resources whenever possible, but Opera just slowly dies after about 10-20 minutes of use. The Javascript engine stops responding, pages only half-load, and eventually stop loading completely. I'm guessing it's a resource issue. Quitting and relaunching the browser solves the problem, but only temporarily. The iPAQ ships with 128 MB of RAM, about 85-87 MB of which is available immediately after a reset. With only Opera running, there still remains about 50 MB that is left unused. My questions are thus: Is it possible to get Opera to address this unused RAM? Are there configuration settings in Opera or in the Windows Registry itself that will help improve performance? I know where to tweak, but the descriptions of the opera:config variables that I've found are less than helpful. Is is laughable to ask about memory management and jQuery in the same sentence? If not, does anyone have any suggestions? Finally, are my plans too ambitious, given the platform I have to work with? I know that Gears and Windows Mobile 6 are on their way out, but they (theoretically) suffice for what I need to do. I could ditch them in favor of an iPhone/iPod Touch, Mobile Safari, and HTML5 but I'd like to try to make this work first. I didn't think that Opera was a dog when it comes to JS performance, but perhaps it's worse than I thought. That this motley collection of technologies works at all is a minor miracle, but it needs to be faster and more stable. I appreciate any suggestions.

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  • monit syntax error : "if 5 restarts within 5 cycles then alert"

    - by omry
    I am trying to get an alert from monit if it fails to restart a service 5 times, but I get a syntax error /etc/monit/monit.d/engine.conf:5: Error: syntax error 'alert' this is the engine.conf file: check process engine with pidfile /var/run/engine.pid group engine start program = "/etc/init.d/engine start" stop program = "/etc/init.d/engine stop" if 5 restarts within 5 cycles then alert any idea what's wrong with it?

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  • Manage utorrent webui with a desktop app

    - by thegreyspot
    Hi! Is there a desktop application that lets you connect to a utorrent server? It would be nice to manage my torrents away from my browser. Also it would be nice to just open a .torrent file and make it upload the file to the server and start downloading. I tried to do some google searches but all it displays is how to setup webui... Thanks!

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  • SubSonic-based app that connects to multiple databases

    - by Fervelas
    Hello there, I currently developed an app that connects to SQL Server 2005 database, so my DAL objects where generated using information from that DB. It will also be possible to connect to an Oracle and MySQL db, all with the same table structures (aside from the normal differences in fields, such as varbinary(max) in SQL Server and BLOB in Oracle, and so on). For this purpose, I already defined multiple connection strings and multiple SubSonic providers for the different DB's the app will run on. My question is, if I generated my objects using a SQL Server database, should the generated objects work transparently with the other DB's or do I need to generate a different DAL for each database engine I use? Should I be aware of any possible bugs I may encounter while performing these operations? Thanks in advance for any advice on this issue.

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  • How to load Facebook iFrame-App into Application Tab on Profile Page

    - by m99
    Hi everybody, how can i load a working iframe app (tested via http://apps.facebook.com/my-app-name) into an application tab on the profile page of my own fanpage. I got the tab, but didn't see anything in the tab. first time i called the tab i got a couple of errors. But now I just see nothing. In sourcecode some css definitions are included. I read, that profile tabs can only use FBML. Is this right? If true, how can i load an iframe application with FBML into the profile tab? Thanks in advance. Marco

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  • Using info.plist for storing target-specific values for a multi-target app

    - by andybee
    I have a multi-target iPhone app which currently includes a header file with constant definitions that are conditionally included at build time depending on which target is being built. However, I was wondering if it might be better to instead include this information in the info.plist for the build, as this generally holds target-specific meta, so logically seems more appropriate. Therefore, my questions are: Is it acceptable to include custom (non-Apple defined) keys in the info.plist file? Is this a suitable place to include meta for the app which changes between targets?

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  • Bad http connection (400) from Simple Native Iphone App to test .net Web Service

    - by leo
    Dear all, I have written a simple hello world .net web service which will accept 2 parameters and return the parameters as a string. The web service is hosted by IIS on a windows xp pc. I am able to access the web service using safari on the iphone simulator, successfully tested the operation using HTTP POST by clicking the "invoke" button. However, when I use the native app on the iphone simulator, I keep getting a bad http connection error 400 on the IIS log. I have tested my native app with http://viium.com/WebService/HelloWorld.asmx and it works. I have already added Does anyone know what is wrong? Is it some settings that have not configured correctly? Thank you very much in advance.

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  • Criteria to Evaluate Business Rules Engines

    - by flybywire
    We are shopping for Business Rules Engines. We want to make our core application customizable to different customers with slightly different requirements. The people who would actually do the customizations are analysts. I.e. non-programmers who are technically skilled (usually have a degree in sciences). What are the criteria to evaluate business rules engines? Are there open source and comercial ones? What are your experiences in ease of use, documentation, support, price, etc. Our app is in Java.

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  • Nesting Levels in Custom Section Handlers in .NET Configuration Files

    - by Water Cooler v2
    I know I can have 1 parent element and 1 child element in my own custom app.config section like so: <sectionGroup> <section> <element /> </section> </sectionGroup> My question is, can I have one or more levels of nesting more than this? Like so: <biggestSectionGroup> <biggerSectionGroup> <sectionGroup> <section> <element /> </section> </sectionGroup> </biggerSectionGroup> </biggestSectionGroup>

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  • iPhone app: recover view after didReceiveMemoryWarning

    - by mga
    The app in question has a MainView->ModalView pair. The ModalView is shown via UIModalTransitionStyleFlipHorizontal. In case of didReceiveMemoryWarning, MainView is dumped (since it is not visible) and the app stays "alive" but when you flip back there is a (very) short period of time when the screen is blank (since the modal dialog is returning to a now-deallocated view). When the animation transition is over, MainView is regenerated and all is ok. I just would like to somehow regenerate MainView before returning from ModalView (in case of a memory warning). Is this a good idea? Am I doing something wrong as far as the warning is concerned? Thanks

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  • Why is my app running

    - by John Smith
    I have compiled my iPhone app with setting (Device, Release). I install it on the test machine and it runs with no problem. Here's the problem. The app is linked to a C++ library. The compilation on the simulator has no errors. However the device compilation produces 568 errors, mostly about different visibilities w.r.t AppDelegate.o. They all look like: QL::Error::~Error()has different visibility (default) in /QL/build/Release-iphoneos/libQLLibrary.a(abcd.o) and (hidden) in /Programming/ObjC/Second/build/Second.build/Release-iphoneos/FG.build/Objects-normal/armv6/AppDelegate.o Why is this, and how can I stop the errors anyway?

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  • How to start a major iPhone app update in Xcode

    - by Eric
    I have an app in the iPhone app store and have released several minor updates to it. I want to begin work on some major feature additions and reorganization, but don't want to lose the source code of my most recent version in case everything goes horribly wrong. Should I start a new Xcode project from scratch and copy my existing source in? If I do this will I be able to submit the build from this new project as an update or will Apple complain that the build comes from a different Xcode project? I've seen (but not used) Xcode's "Snapshots" and "Source Control" features - are these what I'm looking for? Any help or direction greatly appreciated.

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  • With sqlalchemy how to dynamically bind to database engine on a per-request basis

    - by Peter Hansen
    I have a Pylons-based web application which connects via Sqlalchemy (v0.5) to a Postgres database. For security, rather than follow the typical pattern of simple web apps (as seen in just about all tutorials), I'm not using a generic Postgres user (e.g. "webapp") but am requiring that users enter their own Postgres userid and password, and am using that to establish the connection. That means we get the full benefit of Postgres security. Complicating things still further, there are two separate databases to connect to. Although they're currently in the same Postgres cluster, they need to be able to move to separate hosts at a later date. We're using sqlalchemy's declarative package, though I can't see that this has any bearing on the matter. Most examples of sqlalchemy show trivial approaches such as setting up the Metadata once, at application startup, with a generic database userid and password, which is used through the web application. This is usually done with Metadata.bind = create_engine(), sometimes even at module-level in the database model files. My question is, how can we defer establishing the connections until the user has logged in, and then (of course) re-use those connections, or re-establish them using the same credentials, for each subsequent request. We have this working -- we think -- but I'm not only not certain of the safety of it, I also think it looks incredibly heavy-weight for the situation. Inside the __call__ method of the BaseController we retrieve the userid and password from the web session, call sqlalchemy create_engine() once for each database, then call a routine which calls Session.bind_mapper() repeatedly, once for each table that may be referenced on each of those connections, even though any given request usually references only one or two tables. It looks something like this: # in lib/base.py on the BaseController class def __call__(self, environ, start_response): # note: web session contains {'username': XXX, 'password': YYY} url1 = 'postgres://%(username)s:%(password)s@server1/finance' % session url2 = 'postgres://%(username)s:%(password)s@server2/staff' % session finance = create_engine(url1) staff = create_engine(url2) db_configure(staff, finance) # see below ... etc # in another file Session = scoped_session(sessionmaker()) def db_configure(staff, finance): s = Session() from db.finance import Employee, Customer, Invoice for c in [ Employee, Customer, Invoice, ]: s.bind_mapper(c, finance) from db.staff import Project, Hour for c in [ Project, Hour, ]: s.bind_mapper(c, staff) s.close() # prevents leaking connections between sessions? So the create_engine() calls occur on every request... I can see that being needed, and the Connection Pool probably caches them and does things sensibly. But calling Session.bind_mapper() once for each table, on every request? Seems like there has to be a better way. Obviously, since a desire for strong security underlies all this, we don't want any chance that a connection established for a high-security user will inadvertently be used in a later request by a low-security user.

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