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  • asp.net mvc form add comment

    - by Pinu
    I have a page where a product appears on the right side and the user can add comment so i have a user control which gets all the comments and a small text area where user can add new comment for that product. the link of the page is like http://localhost/Product/TestComment/1 Where 1 indicates the id of the product and I have been hard coding my AddNote function below and fourth argument you see has been hard coded, but i need to pass that as the id of the product. How do i do this AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); [AcceptVerbs(HttpVerbs.Post)] public ActionResult AddComment(string txtComment) { bool rst = _NotesService.AddNote(HttpContext.User.Identity.ToString(), txtComment, 1, DateTime.Now, true); return RedirectToAction("TestComment"); }

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  • Opencv python and webcam

    - by Neil Benn
    Hello, I'm working with OpenCV on a beagleboard with ubuntu and OpenCV 1.1 interfaced via Python. I'm trying to set something up to capture a feed from a UVC compatible webcam (logitech C250). I have tested the webcam with luvcview and it works but only if I set the input format to YUV. If I run it in 'normal' mode I am getting back jpeg frames and something - somewhere is not happy! I'm trying to connect with the webcam in OpenCV as I want to get the image back from the webcam and run some analysis on it. As I have a limited device this seems to be the most efficient way of doing it - however I need to instruct the capturing system to capture in YUV and not jpeg. Is there a way of doing this (for example luvcview allow me to enter luvcview -f YUVY)? Cheers, Neil

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  • Is url.openStream harmful?

    - by Casebash
    I was using the java.net.URL.openStream() method to retrieve content from the server. I recently ran into an issue where the HTTP Response code indicated an error, but instead of throwing an exception, the stream still was read anyway. This caused the error to appear much later in the execution and proved to be a red herring. As far as I can see, when you have opened a stream using this method, there is no way to check the HTTP response code. The only way I could find to handle this properly was to use code such as: HttpURLConnection conn=(HttpURLConnection) url.openConnection() if(conn.getResponseCode()!=HttpStatus.SC_OK) //Raise Exception; InputStream in=conn.getInputStream() So do you agree? Is it possible to use openStream safely, or is it a method that should be avoided at all costs. It is worth noting that Sun uses the method in their tutorial code for reading directly from a URL. Then again, the code throws Exception so it isn't exactly a bastion of good coding practices.

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  • Best Method for Minimizable Fullscreen Window

    - by kaykun
    Hi, I'm coding a short game in C++ and Win32, and I want to be able to make it in fullscreen with a fixed size. I also want the user to be able to switch focus between the game window and other windows as much as he/she wants without any weird screen glitches. So far I know of the ChangeDisplaySettings function and creating the window with the WS_POPUP style at initialization to make it fullscreen. To detect the user switching focus to other windows by way of alt+tab or otherwise, what messages should I be handling on the window's WndProc or should I be using another function? When loss of focus is detected should I only call ChangeDisplaySettings(NULL, 0); or are there other functions I should call as well? And what method should I use to handle focus back into the window? Also can anyone give me some info on how to make it work smoothly for different screen sizes? Thanks for any help.

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  • Keyboard for programmers

    - by Robert Höglund
    I'm trying to improve my working environment and I'm still searching for that perfect keyboard that practically types bug-free code all by itself. At the moment I'm using a Logitech Wave for my Windows need and an Apple Wireless Keyboard (the one without a numeric keypad) when doing OS X stuff. I'm quite happy with the Logitech Wave but I would prefer one without all the extra multimedia buttons. What I like most about the Apple Wireless Keyboard is that it is very similar to the Macbook's keyboard which for me makes it easier to write code when on my Macbook. What kind of keyboard would you recommend for going all out writing code until your fingers bleed? I have remapped the Caps Lock key to Ctrl which after a while feels really good, until I have to sit at another computer or when someone at work is going to show me something on my computer. Are there other little keyboard tricks that you use to get a little bit more productive? I have looked into switching to Dvorak but I have decided it's not for me.

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  • Resume recursive scp transfer (with rsync?)

    - by vgm64
    I was transferring several thousand files each ~1MB via scp and my connection was broken after the first 2k files or so. I wanted to know if there was a way to resume the recursive transfer w/o starting over. Something like $ scp -r [email protected]:/datafiles/ ./ ... Happy Transfer ... ... BREAK! ... $ rsync -P [email protected]:/datafiles/ ./ ... Continue transf... The problem is I can't seem to get the syntax correct if it is possible. Can anyone shed some light on if/how it can be done? PS. If you specify the slash after "datafiles" in the rsync line, does that transfer the directory or its contents? I saw conflicting comments when I googled.

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  • Pohlig–Hellman algorithm for computing discrete logarithms

    - by drelihan
    Hi Folks, I'm working on coding the Pohlig-Hellman Algorithm but I am having problem understand the steps in the algorithm based on the definition of the algorithm. Going by the Wiki of the algorithm: http://en.wikipedia.org/wiki/Pohlig%E2%80%93Hellman_algorithm I know the first part 1) is to calculate the prime factor of p-1 - which is fine. Howeever, I am not sure what I need to do in steps 2) and 3). Can someone help with explaining this in plain english (i) - or pseudocode. I want to code the solution myself obviously but I cannot make any more progress unless i understand the algorithm. Note: I have done a lot of searching for this and I read S. Pohlig and M. Hellman (1978). "An Improved Algorithm for Computing Logarithms over GF(p) and its Cryptographic Significance but its still not really making sense to me. Thanks in advance

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  • Tail-recursive pow() algorithm with memoization?

    - by Dan
    I'm looking for an algorithm to compute pow() that's tail-recursive and uses memoization to speed up repeated calculations. Performance isn't an issue; this is mostly an intellectual exercise - I spent a train ride coming up with all the different pow() implementations I could, but was unable to come up with one that I was happy with that had these two properties. My best shot was the following: def calc_tailrec_mem(base, exp, cache_line={}, acc=1, ctr=0): if exp == 0: return 1 elif exp == 1: return acc * base elif exp in cache_line: val = acc * cache_line[exp] cache_line[exp + ctr] = val return val else: cache_line[ctr] = acc return calc_tailrec_mem(base, exp-1, cache_line, acc * base, ctr + 1) It works, but it doesn't memorize the results of all calculations - only those with exponents 1..exp/2 and exp.

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  • How to add handler in dynamic datatemplate

    - by Phillip Ngan
    I am successfully declaring a data template in a code behind as follows: private static DataTemplate CreateTemplate(string sortMemberPath, HorizontalAlignment horzAlignment) { const string xamlFormat = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" >" + "<StackPanel > " + " <TextBlock Margin=\"2,0\" VerticalAlignment=\"Center\" HorizontalAlignment=\"_HALIGNMENT_\" " + " Text=\"hello there\"> " + " </TextBlock> " + "</StackPanel>" + "</DataTemplate>"; return (DataTemplate) XamlReader.Load(xamlReturned); } But now I want to add a size changed handler by changing the line: + "<StackPanel > " to + "<StackPanel SizeChanged="SizeChangedHandler" > " I have the method "SizeChangedHandler" declared in the code behind. This results in a xaml parse error when the control attempts to load at runtime. I suspect that it can't find the handler "SizeChangedHandler". How can I specify this handler so that the xaml parser is happy.

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  • TRY/CATCH_ALL vs try/catch

    - by Tim
    I've been using c++ for a while, and I'm familiar with normal try/catch. However, I now find myself on Windows, coding in VisualStudio for COM development. Several parts of the code use things like: TRY { ... do stuff } CATCH_ALL(e) { ... issue a warning } END_CATCH_ALL; What's the point of these macros? What benefit do they offer over the built-in try/catch? I've tried googling this, but "try vs TRY" is hard to search for.

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  • Using ELMAH and URLRewritingNet Together

    - by Chris Laythorpe
    I have ELMAH setup on my production server and it has done a fantastic job of letting me know about any niggles - as well as any creative SQL injection! I've decided to introduce URl Rewriting and went for http://www.urlrewriting.net/ in the end. It was nice and easy to setup and it's doing exactly what I want with the customer-facing site. The problem is ELMAH. Because I've set the urlrewritingnet node in my config like so: <urlrewritingnet rewriteOnlyVirtualUrls="true" contextItemsPrefix="QueryString" defaultPage = "default.aspx" defaultProvider="RegEx" xmlns="http://www.urlrewriting.net/schemas/config/2006/07" > ...ELMAH likes to do this to it's axd links; http://www.mydomain.com/elmah.axd/stylesheet/default.aspx Does anyone have any idea how to either a) stop the re-writer following the .axd; or b) add rules to the re-writer to get ELMAH to work Any ideas? I'm happy to hack about with the httpHandlers...

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  • Why does IIS not support chunked transfer encoding?

    - by Graeme Perrow
    I am making an HTTP connection to an IIS web server and sending a POST request with the data encoded using Transfer-Encoding: chunked. When I do this, IIS simply closes the connection, with no error message or status code. According to the HTTP 1.1 spec, All HTTP/1.1 applications MUST be able to receive and decode the "chunked" transfer-coding so I don't understand why it's (a) not handling that encoding and (b) it's not sending back a status code. If I change the request to send the Content-Length rather than Transfer-Encoding, the query succeeds, but that's not always possible. When I try the same thing against Apache, I get a "411 Length required" status and a message saying "chunked Transfer-Encoding forbidden". Why do these servers not support this encoding?

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  • C# Winforms ADO.NET - DataGridView INSERT starting with null data

    - by Geo Ego
    I have a C# Winforms app that is connecting to a SQL Server 2005 database. The form I am currently working on allows a user to enter a large amount of different types of data into various textboxes, comboboxes, and a DataGridView to insert into the database. It all represents one particular type of machine, and the data is spread out over about nine tables. The problem I have is that my DataGridView represents a type of data that may or may not be added to the database. Thus, when the DataGridView is created, it is empty and not databound, and so data cannot be entered. My question is, should I create the table with hard-coded field names representing the way that the data looks in the database, or is there a way to simply have the column names populate with no data so that the user can enter it if they like? I don't like the idea of hard-coding them in case there is a change in the database schema, but I'm not sure how else to deal with this problem.

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  • How to model "target day" in UML Classdiagrams

    - by Tobiask
    Hi there, I want to describe the following situation in an UML Classdiagram: A day, on which a newspaper is send to a customer. This day could be sth. like "every friday" or "every first day of a month". My idea to represent this in a UML Classdiagram: -targetDay:Integer -targetDayGrid:Enumeration targetDay would be sth. like "1" (for monday) oder "5" (for friday) or it could be "1" for the first day of the month or "10" for the 10th day of the month. targetDayGrid is an enum: weekly, monthly. So the enum sets the semantic meaning of the number in targetDay. I´m not happy with this, do you know any other solution to represent my problem? Or do you think my solution is okay?

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  • Can I upgrade Xcode to support a newer version of GCC to learn C++0x?

    - by Shane
    I would like to jump in learn C++0x, which has matured to a level I'm happy with. Xcode on Snow Leopard 10.6 is currently at GCC 4.2.1, and the new features I'd like to try, like std::shared_ptr, lambdas, auto, null pointer constant, unicode string literals, and other bits and pieces, require at least 4.3 (I believe). Ideally I'd use Xcode but I'm not even sure if you can manually upgrade the compiler for Xcode. Is this possible? Otherwise, what is the best way to install a different version of GCC that doesn't interfere with the rest of the system? Regards, Shane

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  • null-coalescing operator or conditional operator

    - by rkrauter
    Which coding style do you prefer: object o = new object(); //string s1 = o ?? "Tom"; // Cannot implicitly convert type 'object' to 'string' CS0266 string s3 = Convert.ToString(o ?? "Tom"); string s2 = (o != null) ? o.ToString() : "Tom"; s2 or s3? Is it possible to make it shorter? s1 does not obviously work.

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  • How to kill mysql process through C#.

    - by deepesh khatri
    I am getting "too many connections" problem in an Asp .Net Mvc application which get fix when i manually kill process through Mysql v6.56 IDE, But on remote hosting computer where i can't kill process each time how can i fix this error. I have tried making a connection to information_schema DB's PROCESSLIST table but when connection is about to execute command there comes an error "access denied of root@loclahostto information_schema". I also have tried to grant all privileges to root@loclahost but still i am not able to fix this problem. I have been coding the same way from last two years but in this application i am getting this problem i have use close each connection in every method. Please if some one have ever got this problem or know the answer.Please help me. Thanx in advance

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  • How to avoid clobbering files when creating a tar archive

    - by Andrew Grimm
    This question notes that it is possible to overwrite files when creating a tar archive, and I'm trying to see how to avoid that situation. Normally, I'd use file roller, but the version installed is playing up a bit (using 1.1 Gb of memory), and I'm not the system administrator. I looked at --confirmation and --interactive, but that only asks me if I want to add file x to the archive, not whether I want to overwrite an existing file. For example, tar --interactive -czvf innocent_text_file.txt foo* Will ask me about each file, but is perfectly happy to overwrite innocent_text_file.txt Is there any switch that acts like -i for cp? Note I am asking about creating an archive, not extracting an archive. Clarification What I'm worried about is accidentally doing something like this tar -czvf * #Don't do this! which would overwrite the first file listed in the glob. To avoid it, I want tar to complain if the first file mentioned already exists, like cp -i * #Don't do this! would check if it would cause you to overwrite an existing file.

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  • Configurable ruby logger setup: Logger.new().level = variable

    - by Daniel
    Hi, I want to change the logging level of an application (ruby). require 'logger' config = { :level => 'Logger::WARN' } log = Logger.new STDOUT log.level = Kernel.const_get config[:level] Well, the irb wasn't happy with that and threw "NameError: wrong constant name Logger::WARN" in my face. Ugh! I was insulted. I could do this in a case/when to solve this, or do log.level = 1, but there must be a more elegant way! Does anyone have any ideas? -daniel

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  • Is there any specific available method in jsp/Servlet API which tell you from which page the request

    - by anubhavjain86
    Hi, I have been working in Oracle iStore from past 4 months and i have been managing the application without any IDE (basically doing all the chores on notepad only because application has been designed poorly and no IDE can support it). Since the coding is done on simple notepad files it is very hard to find out the bugs in the application. I am facing a problem that i have not idea which jsp page redirect the control to which jsp page. For instance, there are two jsp pages A.jsp and other is B.jsp. Now the browser is currently displaying A.jsp. When the user click on submit button (available on A.jsp) the form submits and redirects the control to B.jsp. Now my problem is that i know i am coming on B.jsp but, i don't know that A.jsp is redirecting the control to B.jsp. Is there an method available in Servlet API which tells Which jsp is redirecting the control to B.jsp? Sorry for making you read so much long story :( appreciate ur help in advance Best Regards Anubhav

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  • Google Chrome - NETWORK_IP_ADDRESSES_CHANGED - pages only partially load

    - by Julian
    Hi Google Chrome version (8.0.552.224 (Official Build 68599)) I have developed a web site using asp.net mvc and jquery. it uses a lot of ajax. I noticed that occasionally a web page does not complete loading all files from the server. Browsing through forums It seems that this also happens to other people. Looking in to the Chromium Net-Internals ( type: chrome://net-internals/ as a url in the chrome browser ) I noticed that the pages do not complete loading if a NETWORK_IP_ADDRESSES_CHANGED event occurred. Any files that were not fetched from the server before the time of the NETWORK_IP_ADDRESSES_CHANGED event failed to arrive with error (-3) Do you know why the NETWORK_IP_ADDRESSES_CHANGED event occurs? Is there a way to stop it from happening? Thanks and be happy, Julian

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  • Hibernate - hibernate.hbm2ddl.auto = validate

    - by azp74
    I am interested in how hibernate.hbm2ddl.auto=validate actually works and I am struggling to find comprehensive documentation. We've recently discovered production system was affected by http://opensource.atlassian.com/projects/hibernate/browse/HHH-3532 (Hibernate matches foreign keys on name, rather than signature and so will recreate them for you) and hibernate.hbm2ddl.auto=update is being removed from our next release. I would be quite happy to just get rid of hibernate.hbm2ddl.auto altogether and manage our database ourselves. However, not all my colleagues share this world view and some are keen to add back in hibernate.hbm2ddl.auto=validate. I'm concerned this will hit the same problem and I'm interested in finding more documentation about how this validation actually works. The Hibernate Community Documentation (http://docs.jboss.org/hibernate/core/3.3/reference/en/html/session-configuration.html) really just makes reference to the values. Does anyone have any good documentation pointers, or any real life experience of using validate in a production system?

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  • Array Vs. Linked List

    - by Onorio Catenacci
    I apologize--this question may be a bit open-ended but I think there are probably definite, quantifiable answers to it so I'll post it anyway. A person I know is trying to learn C++ and software development (+1 to him) and he asked me why someone would want to use a linked list in preference to an array. Coding a linked list is, no doubt, a bit more work than using an array and he wondered what would justify the additional effort. I gave him the answer I know: insertion of new elements is trivial in linked list but it's a major chore in an array. But then I got to thinking about it a bit more. Besides the ease of insertion of a new element into a linked list are there other advantages to using a linked list to store a set of data vs. storing it in an array? As I said, I'm not meaning to start a long and drawn-out discussion. I'm just looking for other reasons that a developer might prefer a linked list to an array.

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  • Named Function Expressions in IE, part 2

    - by Polshgiant
    I asked this question a while back and was happy with the accepted answer. I just now realized, however, that the following technique: var testaroo = 0; (function executeOnLoad() { if (testaroo++ < 5) { setTimeout(executeOnLoad, 25); return; } alert(testaroo); // alerts "6" })(); returns the result I expect. If T.J.Crowder's answer from my first question is correct, then shouldn't this technique not work?

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  • How to read a csv file with python

    - by john
    Hello, I'm trying to read a csv file but it doesn't work. I can read my csv file but when I see what I read, there where white space between values. Here is my code # -*- coding: iso-8859-1 -*- import sql_db, tmpl_macros, os import security, form, common import csv class windows_dialect(csv.Dialect): """Describe the usual properties of unix-generated CSV files.""" delimiter = ',' quotechar = '"' doublequote = 1 skipinitialspace = 0 lineterminator = 'n' quoting = csv.QUOTE_MINIMAL def reco(d): cars = {210:'"', 211:'"', 213:"'", 136:'à', 143:'è', 142:'é'} for c in cars: d = d.replace(chr(c),cars[c]) return d def page_process(ctx): if ctx.req_equals('catalog_send'): if 'catalog_file' in ctx.locals.__dict__: contenu = ctx.locals.catalog_file[0].file.read() #contenu.encode('') p = csv.reader(contenu, delimiter=',') inserted = 0 modified = 0 (cr,db) = sql_db.cursor_get() for line in p: if line: logfile = open('/tmp/test.log', 'a') logfile.write(line[0]) logfile.write('\n') logfile.write('-----------------------------\n') logfile.close()

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