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• what database should i choose ?

  - by MemoryLeak

  I use winforms to develop a desktop application, and right now I plan to use SQL server express, but the problem is, if i use sql server express, then the installation is much trouble, i need to install sql server first, and install my own applicaiton. Then I tried to use access 2003 as my database, then I only need to copy the mdb file with my application. But the access 's function is not that strong, the text length is limited to 255 byte. Is there any other database solution, which is easy to integrate to my application, and easy to install after i develop my application ? Many many desktop application have their own database, and easy to install and easy to use, what database do they use ?

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• How to place text on top of image in ReportViewer

  - by Christoffer

  I feel very silly asking this, since it seems like it just should work, but I cannot make it work and cannot find anything in the documentation about this. The problem: I'm developing an application in Visual Studio 2010 that is utilizing ReportViewer, rendering the report locally. In the report designer, I place a textbox on top of an image. This looks fine in the designer, but when rendering the report, the textbox is rendered below the image. Now, before you suggest it, I have tried placing a textbox on top of a rectangle (or other control) with the BackgroundImage property set. This works. But: I cannot find a way to rescale the background image to fit the control. Setting a different dpi for the background image does nothing. Simply rescaling the image to a different resolution is not an option, since I eventually want to print the report. Does anybody have a solution to this?

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• Can bad stuff happen when dividing 1/a very small float?

  - by Jeremybub

  If I want to check that positive float A is less than the inverse square of another positive float B (in C99), could something go wrong if B is very small? I could imagine checking it like if(A<1/(B*B)) but if B is small enough, would this possibly result in infinity? If that were to happen, would the code still work correctly in all situations? in a similar vein, I might do if(1/A>B*B) Which might be slightly better because B*B might be zero if B is small (is this true?) Finally, a solution that I can't imagine being wrong is if(sqrt(1/A)>B) Which I don't think would ever result in zero division, but still might be problematic if A is close to zero. So basically, my questions are Can 1/X ever be infinity if X is greater than zero (but small)? Can X*X ever be zero if X is greater than zero? Will comparisons with infinity work the way I would expect them to?

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• Should you correct compiler warnings about type conversions using explicit typecasts?

  - by BastiBechtold

  In my current project, the compiler shows hundreds of warnings about type conversions. There is a lot of code like this iVar = fVar1*fVar2/fVar3; // or even iVar = fVar1*fVar2/fVar3+.5f; which intentionally assign float values to int. Of course, I could fix these warnings using iVar = int(...); but that looks kind of ugly. Would you rather live with the ugliness or live with the warnings? Or is there even a clean solution?

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• Generalized plugable caching pattern?

  - by BCS

  Given that it's one of the hard things in computer science, does anyone know of a way to set up a plugable caching strategy? What I'm thinking of would allow me to write a program with minimal thought as to what needs to be cached (e.i. use some sort of boiler-plate, low/no cost pattern that compiles away to nothing anywhere I might want caching) and then when things are further along and I know where I need caching I can add it in without making invasive code changes. As an idea to the kind of solution I'm looking for; I'm working with the D programing language (but halfway sane C++ would be fine) and I like template.

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• How do I record streams in chunks on Flash Media Server.

  - by Vasil

  I want to record a stream which is published with Flash Live Encoder to FMS 3.5, but split the recording in files with predefined length. For example if a stream 'webcam' is published I want to record it in chunks of 10 minutes: 'webcam1.flv', 'webcam2.flv' ... From what I can tell there's no facility to work with timers. The only solution I could think of was using stream.record() with a time limit parameter but that seems like a hack because it triggers NetStream.Record.DiskQuotaExceeded on the stream when the recordin should stop and start recording another chunk. Has anyone done something similar?

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• iPhone app crashes at the mid of running or during launch

  - by Sankar Chandra Bose

  Goodafternoon All! I have an issue in my application.My iphone application crashes at mid of running or during the application launch at times both in iPhone and simulator. I know that memory management is not proper or is it because os some other reason. My application is using a web service that pulls the data and displays it in the view,the working of web service is proper,because i see the data coming from the service in my app. Can anybody suggest how to manage memory properly (i.e,) where i have to release the objects,what are the objects that has to be released and the objects that should not be released. Kindly suggest a solution to the problem. Thanks in advance

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• Port 80 is being used by SYSTEM (PID 4), what is that?

  - by GiH

  I am trying to use port 80 for my application server, but when I perform "netstat -aon" I get TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4 When I look up the process in task manager, it shows PID 4 is SYSTEM, thats it, not extension... nothing, just "SYSTEM". Whats going on here? I'm afraid to end this process, what do I do? UPDATE: I've solved this through a stackoverflow question. Follow this link to find the solution for how to get IIS to stop listening on port 80 for a specified IP address.

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• Graph - strongly connected components

  - by HardCoder1986

  Hello! Is there any fast way to determine the size of the largest strongly connected component in a graph? I mean, like, the obvious approach would mean determining every SCC (could be done using two DFS calls, I suppose) and then looping through them and taking the maximum. I'm pretty sure there has to be some better approach if I only need to have the size of that component and only the largest one, but I can't think of a good solution. Any ideas? Thanks.

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• Debugging of native code

  - by graham.reeds

  I have a C# Service that is calling a C DLL that was originally written in VC6. There is a bug in the DLL which I am trying to inspect. After having a nightmare trying to get debug to work I eventually added the dll to the VS2005 solution containing the C# Service and added the necessary _CRT_SECURE_NO_WARNINGS. The debug version of the service is registered using 'installutil.exe' tool. I can get the debugger to break just before the line where the dll is entered via a call to System.Diagnostics.Debugger.Break();. I found some instruction on the net regarding stepping into debugging unmanaged code, and enabled the 'Enable unmanaged code debugging' check box, I've also tried turning on the Options-Debugging-Native 'Load DLL exports' and 'Enable RPC Debugging' (even though it's not COM). I've also copied the debug dll and .pdb to the same bin directory as the However the unmanaged code is not being stepped into which is what I really need. UPDATE: I found the Debugging Type in the DLL properties and set it to 'Mixed' as per suggestion on several sites but to no avail.

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• Twisted - how to create multi protocol process and send the data between the protocols

  - by SpankMe

  Hey, Im trying to write a program that would be listening for data (simple text messages) on some port (say tcp 6666) and then pass them to one or more different protocols - irc, xmpp and so on. I've tried many approaches and digged the Internet, but I cant find easy and working solution for such task. The code I am currently fighting with is here: http://pastebin.com/ri7caXih I would like to know how to from object like: ircf = ircFactory('asdfasdf', '#asdf666') get access to self protocol methods, because this: self.protocol.dupa1(msg) returns error about self not being passed to active protocol object. Or maybe there is other, better, easier and more kosher way to create single reactor with multiple protocols and have actions triggeres when a message arrives on any of them, and then pass that message to other protocols for handling/processing/sending? Any help will be highly appreciated!

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• In Java, is there a way to obtain the command line parameters even if main() didn't save them?

  - by Uri

  We have a program with a main() that parses certain CLPs but does not save them anywhere. I then have my own plug-in code that needs access to the original CLPs (so I can transmit more parameters) for it. However, I cannot change main() I saw that there is apparently a way to do this in C#, I'm looking for an equivalent Java solution on Linux. UPDATE: Obviously, I'm aware of how main() works. Unfortunately, I cannot change the existing application or the way it is invoked (except for CLPs). I can only access via a sandboxed plugin code. My question is whether there is a way to get the command line (rather then the environment variables with -D) that the JVM was invoked with.

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• Count the number of lines in a Java String

  - by Simon Guo

  Need some compact code for counting the number of lines in a string in Java. The string is to be separated by \r or \n. Each instance of those newline characters will be considered as a separate line. For example, "Hello\nWorld\nThis\nIs\t" should return 4. The prototype is private static int countLines(String str) {...} Can someone provide a compact set of statements? I have solution at here but it is too long, I think. Thank you.

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• Posting an image and textual based data to a wcf service

  - by James Hay

  I have a requirement to write a web service that allows me to post an image to a server along with some additional information about that image. I'm completely new to developing web services (normally client side dev) so I'm a little stumped as to what I need to look into and try. How do you post binary data and plain text into a servic? What RequestFormat should I use? It looks like my options are xml or json. Can I use either of these? Bit of a waffly question but I just need some direction rather than a solution as I can't seem to find much online.

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• Better exception for non-exhaustive patterns in case

  - by toofarsideways

  Is there a way to get GHCi to produce better exception messages when it finds at runtime that a call has produced value that does not match the function's pattern matching? It currently gives the line numbers of the function which produced the non-exhaustive pattern match which though helpful at times does require a round of debugging which at times I feel is doing the same set of things over and over. So before I tried to put together a solution I wanted to see if something else exists. An exception message that in addition to giving the line numbers shows what kind of call it attempted to make? Is this even possible?

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• ASP.Net: Scheduled tasks in a shared environment.

  - by UpTheCreek

  This is really an extension of this question, which asked the best way to schedule tasks which need to be performed periodically within ASP.NET in a normal environment. However, I would like to ask this specifically for a Shared Hosting Environment (most of the answers to the previous question would not work in a shared environment as far as I know). One obvious solution would be to have a page which is responsible to performing the tasks on the hosted machine, and call this page from another machine (that you have full control over) using e.g. a windows scheduled task. This is a bit nasty though - are there any better approaches?

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• Linq like or other construction

  - by Yauhen Kavalenka

  I have DB oracle in my solution. I want to have some results in this query. Query example: select * from doctor where doctor.name like '%IVANOV_A%'; But if i do it at LINQ i cannot get any result. from p in repository.Doctor.Where(x => x.Name.ToLower().Containsname)) select p; Where 'name' is variable of string parameter. Web layout request next string: "Ivanov a" or "A Ivanov" But i suggest for user choose you pattetn for query. How i can to get "patient by name" if name consist of "First name" and "Last name" but user doesn't know your doctor's full name?

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• JFrame the same shape as an Image / Program running in background

  - by Jan Weber

  My question is simple, the solution surely not. I am looking for a way to shape a JFrame the same as an Image it will be displaying. By shape I mean the shape of the pixels that have an alpha != 0. I've already found a working example using a GeneralPath object, but it created ~110000 "nodes" for an Image of about 500*400, so starting the JFrame took more than 2 minutes, which is definitely not the desired effect, the startup should be in under 2 seconds. Thanks for your time.

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• Google Maps API Key alert problem

  - by taudorf

  I have a problem with my Google Maps API key. I get an alert saying "This web site needs a different Google Maps API key." When I prees OK to the alert the map are loading and working fine. The same problem is already posted: http://stackoverflow.com/questions/1803327/google-maps-api-key-not-working I have tried to request the API key for both "http://www.domain.com" and "http://domain.com" but I still get the alert. When I follow the instructions from their FQA and use alert(window.location.host) I get www.domain.com but the api key generator will only accept the domain if the prefix is http:// Does anyone have a solution to this?

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• Socket programming and telnet with VB.net

  - by Mike

  I'm writing a GUI-based app in VB.net that talks to a LambdaMOO server via telnet, sends commands to display the object hierarchy, then parses the output and creates a visual representation of the object hierarchy. So my question is: is there some kind of "telnet client" class for .NET to simplify the sending and receiving of data, or do I have to write my own using the socket API? Does Mono have something like this? Barring an easy solution, does anyone have a good tutorial they can point to for telnet client programming in VB.net?

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• UIImageView in UITableCell gets a weird size

  - by Behlül

  Hi, I'm trying to place a UIImageView in a UITableViewCell. I create a special view called ProductView. In that view, I have several components, one of them being a UIImageView. I set this ProductView as content view of the UITableViewCell. Everything is drawn properly except the UIImageView. UIImageView gets scaled meaninglessly. It's height gets twice the height of the table cell size. I've spent hours trying to solve this problem. I've set the frame of UIImageView manually, I've called drawRect method of UIImage in UIImageView, neither of them worked. I'm thinking of replacing UITableView with a UIScrollView if I can't find a solution. Does anyone know how to solve this problem?

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• Put logic behind generated LinqToSql fields

  - by boris callens

  In a database I use throughout several projects, there is a field that should actually be a boolean but is for reasons nobody can explain to me a field duplicated over two tables where one time it is a char ('Y'/'N') and one time an int (1/0). When I generate a datacontext with LinqToSql the fields off course gets these datatypes. It would be nice if I don't have to drag this stupid choice of datatype throughout the rest of my application. Is there a way to give the generated classes a little bit of logic that just return me return this.equals('Y'); and return this==1; Preferably without having to make an EXTRA field in my partial class. It would be a solution to give the generated field a totally different name that can only be accessed through the partial class and then generate the extra field with the original name with my custom logic in the partial class. I don't know how to alter the accesibility level in my generated class though.. Any suggestions?

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• PayPal testing without using Sandbox

  - by Webbo

  I am developing a website in PHP that accepts PayPal payments. It uses the IPN from PayPal and has a custom payment template etc etc. It all works great through the Sandbox server but when it comes to showing my client, I don't want to have to tell them to login to/create a Sandbox account, create a buyer account and make a payment - he hasn't got time for that and probably won't be able to do it. Therefore, my question is - is there any simple way that I can show my client the PayPal integration in "test mode" without him using the sandbox? I realise that I can set the transaction value to 0.01 and just test on the live PayPal server but that isn't an ideal solution. Cheers! Edit: Just to better explain what I mean, this is what my client sees when he first goes to checkout; As you can see, he has to login to his Sandbox account before then purchasing the item using the buyer email that he sets up. It's just confusing and totally non user-friendly.

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• Moving ordered elements and adding arbitrary text in Deliverance

  - by Jon Hadley

  Using the following XPath derived rule, I am able to select a list of events from a Plone site (similar to Plone Community events) and display them in my Deliverance themed site: <replace content="//*[@id='parent-fieldname-title' or @class='explain' or @id='parent-fieldname-location' or @id='parent-fieldname-text']" theme="#center-content-to-replace-one" /> However, two separate, but related, problems now rear their heads. I can't work out how to: Re-order elements within the replaced theme, such as moving images originally held within #parent-fieldname-text to before #parent-fieldname-title Put arbitrary text before elements. Such as 'Page Title:' before #parent-fieldname-title I could do both if I was just dealing with one record, as place holders(1) or text before place holders(2) could be specified in the template - but I can't see a away for that template behaviour to repeat across multiple items in one page. (if that is indeed the solution) Is this a job for pyQuery?

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• Centralizing a floating element :(

  - by 2x2p1p

  Hi guys :| My "div" element have a relative width, it isn't absolute so I can't use exact numbers to centralize. A nice solution is to use "display: inline-block": body { text-align: center; } #myDiv { border: 1px solid black; display: inline-block; padding: 50px; } But this element NEEDS to float, I tried this: #myDiv { border: 1px solid black; display: inline-block; float: left; padding: 50px; } And this: #myDiv { border: 1px solid black; display: inline-block; padding: 50px; position: absolute; } Without any success, can somebody help me ? Thanks

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