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• c# memory allocation and deallocation patterns

  - by Neal

  Since C# uses Garbage Collection. When is it necessary to use .Dispose to free the memory? I realize there are a few situations so I'll try to list the ones I can think of. If I close a Form that contains GUI type object, are those objects dereferenced and therefore will be collected? If I create a local object using new should I .Dispose of it before the method exits or just let the GC take care of it? What is good practice in this case? Are there any times in which forcing a GC is understandable? Are events collected by the GC when it's object is collected?

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• Implementing DRM in enterprise environment

  - by Chathuranga Chandrasekara

  Consider the following Business requirement. There are some templates of documents on a server (MS OFFICE format) The users should be able to edit the documents and save a copy in the server. The users SHOULD NOT be able to save a local copy. i.e That option should be not available. Do I have any feature\hack to do this with MS Office? Think about a solution like google docs without the Download options. It is ideal but needs a lot of effort to implement it.

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• Usage of open source libraries in high governance and risk-averse large organizations (banks, financ

  - by bart

  Does anyone have any good stories of these kinds of organizations being open to using open source dependencies (and also tools). Many staff I've encountered have little or no exposure to open source/systems and open source is treated with great suspicion. Some reasons given for this are lack of support and robustness, which is ironic given the number of end-of-life unsupported vendor products that are in production. I'm also interested in any success stories where you've seen open source go into orgs like this and have a real benefit!

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• Can I autorelease an instance of NSProxy?

  - by Jonathan Sterling

  Does NSProxy really implement -autorelease and -release? If not, do I need to manually dealloc NSProxy instances? (Please assume that I am not using GC). Thanks for clear this up for me.

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• How UIWindow#addSubview can make memory leak?

  - by Jakub

  Hello, I started to learn using Instrument, but I cannot figure it out. After I start my application, the UI shows up, I do nothing and after few seconds I can see memory leak detected: When I have a look at the second leak I can see the following stack: When I double click on the cell related to my code I can see that it is pointing to the following line of code: [window addSubview:newPostUIViewController.view]; from the method: - (void)applicationDidFinishLaunching:(UIApplication *)application { //creating view controller newPostUIViewController = [[NewPostUIViewController alloc] initWithNibName:@"NewPostView" bundle:nil]; newPostUIViewController.title = @"Post it!"; [window addSubview:newPostUIViewController.view]; // Override point for customization after application launch [window makeKeyAndVisible]; } I wonder, how this can be a reason of a leak? I release newPostUIViewController in the dealloc method of PostItAppDelegate class. Any ideas how this could be explained?

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• How do I reward my developers for the little things they get right?

  - by Nat

  I am in a tech lead role and my developers get stuff right most of the time. How do I communicate to them thier value to me? (I.e. they have value because I do not have to go through and point out mistakes which means I do not have to watch them like a hawk which frees me to do more useful things). In summary For doing the mundane well on a day to day basis, it is good to recognise the developers effort verbally to them. An honest thankyou that mentions the specific behaviour and its positive repercussions to you personally will be well received, adjust the language to suite each individual. (Note that other developers within earshot may also respond to this by increasing their efforts in this specific activity.) Other things that should be done regularly are: Team drinks In many cultures this is an entirely worthy way of giving the team some time to socialise and relax. Be sure that you do not exclude people who do not drink or are not keen on pub culture. Shared meals are another option. Formal written (email) acknowledgment and praise to senior managers of the teams efforts and successes. (Note that acknowledging individuals alone may damage team spirit) Work the hours you expect your team to do. If they absolutely must work late for a deadline, be there in support Go to bat for the team. Refuse to let them be forced to work long periods of overtime without compensation. Protect them from level politics and stress. Give your team the best equipment you can afford. Good tools show respect and improve productivity. Small or large team rewards where appropriate can consist of many interesting activities/ items. If it allows the team to get together in a fun and even lightly competitive manner it will work (foosball table, go-karting, darts board, video game console etc). Don’t forget to listen to what the team wants, each team will have different ideas. Ensure they are getting a fair deal financially from the company. While different people may have different expectations of their pay, someone being paid unfairly will rot morale for the entire team

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• Debugging HeapReAlloc failure using GetExceptionCode

  - by Becky Franklin

  Hey folks, Been messing about with this all day and haven't got anywhere so I'm hoping someone can help me - I have a HeapReAlloc method failing with the error ACCESS_VIOLATION, but I'm unsure how to implement a further check using GetExceptionCode as it uses try/catch or exception or something - can someone give me a quick example of how I can use it to narrow down this failure, please? Thanks very much, Becky

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• Perks for new programmers

  - by Autobyte

  I intend on hiring 2-3 junior programmers right out of college. Aside from cash, what is the most important perk for a young programmer? Is it games at work? I want to be creative... I want some good ideas

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• How to connect a new query script with SSMS add-in?

  - by squillman

  I'm trying to create a SSMS add-in. One of the things I want to do is to create a new query window and programatically connect it to a server instance (in the context of a SQL Login). I can create the new query script window just fine but I can't find how to connect it without first manually connecting to something else (like the Object Explorer). So in other words, if I connect Obect Explorer to a SQL instance manually and then execute the method of my add-in that creates the query window I can connect it using this code: ServiceCache.ScriptFactory.CreateNewBlankScript( Editors.ScriptType.Sql, ServiceCache.ScriptFactory.CurrentlyActiveWndConnectionInfo.UIConnectionInfo, null); But I don't want to rely on CurrentlyActiveWndConnectionInfo.UIConnectionInfo for the connection. I want to set a SQL Login username and password programatically. Does anyone have any ideas? EDIT: I've managed to get the query window connected by setting the last parameter to an instance of System.Data.SqlClient.SqlConnection. However, the connection uses the context of the last login that was connected instead of what I'm trying to set programatically. That is, the user it connects as is the one selected in the Connection Dialog that you get when you click the New Query button and don't have an Object Explorer connected. EDIT2: I'm writing (or hoping to write) an add-in to automatically send a SQL statement and the execution results to our case-tracking system when run against our production servers. One thought I had was to remove write permissions and assign logins through this add-in which will also force the user to enter a case # canceling the statement if it's not there. Another thought I've just had is to inspect the server name in ServiceCache.ScriptFactory.CurrentlyActiveWndConnectionInfo.UIConnectionInfo and compare it to our list of production servers. If it matches and there's no case # then cancel the query.

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• Memory allocation included in API

  - by gurugio

  If there is the 'struct foo' and an APIs which handle foo, which is more flexible and convenient API? 1) API only initialize foo. User should declare foo or allocate memory for foo. The this style is like pthread_mutex_init/pthread_mutex_destroy. example 1) struct foo a; init_foo(&a);' example 2) struct foo *a; a = malloc(sizeof(struct foo)); init_foo(a); 2) API allocates memory and user get the pointer. This is like getaddrinfo/freeaddrinfo. example) struct foo *a; get_foo(&a); put_foo(a);

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• Visual Studio 2005 to VS 2008

  - by Adi

  hi all, I am a newbie in working on VS IDE and have not much experience in how the different libraries and files are linked in it. I have to build a OpenCV project which was made in VS2005 by one of my colleagues into VS2008. The project is for blob detection. Following is what he has to say in readme : Steps to use the library (using MSVC++ sp 5): 1 - open the project of the library and build it 2 - in the project where the library should be used, add: 2.1 In "Project/Settings/C++/Preprocessor/Additional Include directories" add the directory where the blob library is stored 2.2 In "Project/Settings/Link/Input/Additional library path" add the directory where the blob library is stored and in "Object/Library modules" add the cvblobslib.lib file 3- Include the file "BlobResult.h" where you want to use blob variables. 4- To see an example on using the blob library, see the file example.txt inside the zip file. NOTE: Verify that in the project where the cvblobslib.lib is used, the MFC Runtime Libraries are not mixed: Check in "Project-Settings-C/C++-Code Generation-Use run-time library" of your project and set it to Debug Multithreaded DLL (debug version ) or to Multithreaded DLL ( release version ). 2 Check in "Project-Settings-General" how it uses the MFC. It should be "Use MFC in a shared DLL". NOTE: The library can be compiled and used in .NET using this steps, but the menu options may differ a little NOTE2: In the .NET version, the character sets must be equal in the .lib and in the project. [OpenCV yahoo group: Msg 35500] Can anyone explain me , how to go about in doing this in VS2008. I would also appreciate if someone can explain me how the different libraries are linked , what is Debug, What is Release and all in a Visual Studio project folder we have.\ Thanks in advance Aditya

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• differing methods of alloc / init / retaining an object in objective-c

  - by taber

  In several pieces of sample objective-c code I've seen people create new objects like this: RootViewController *viewController = [[RootViewController alloc] init]; self.rootViewController = viewController; // self.rootViewController is a (nonatomic,retain) synthesized property [viewController release]; [window addSubview: [self.rootViewController view]]; Is that any different "behind the scenes" than doing it like this instead? self.rootViewController = [[RootViewController alloc] init]; [window addSubview: [self.rootViewController view]]; Seems a bit more straightforward/streamlined that way so I'm wondering why anyone would opt for the first method. Thanks!

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• Cannot connect to database,.Login failed for user

  - by kishorejangid

  Yesterday my database was connected perfectly.. We have installed Windows Server 2008 R2 on our server and the i have added the user to the client PC name SMTECH5 with user jangid Now my database is not connecting using windows authentication. only the master database is connecting.. here are somw of the error throwned TITLE: Connect to Database Engine Cannot connect to SMTECH5\COLLEGEERP. ADDITIONAL INFORMATION: Cannot open user default database. Login failed. Login failed for user 'SMTECH\jangid'. (Microsoft SQL Server, Error: 4064) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=4064&LinkId=20476 BUTTONS: OK TITLE: Connect to Database Engine Cannot connect to SMTECH5\COLLEGEERP. ADDITIONAL INFORMATION: Cannot open user default database. Login failed. Login failed for user 'SMTECH\jangid'. (Microsoft SQL Server, Error: 4064) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=4064&LinkId=20476 BUTTONS: OK this happens on all the pcs in our lab

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• Release Process Improvements

  - by wallismark

  The process of creating a new build and releasing it to production is a critical step in the SDLC but it is often left as an afterthought and varies greatly from one company to the next. I'm hoping people will share improvements they have made to this process in their organisation so we can all takes steps to 'reduce the pain'. So the question is, specify one painful/time consuming part of your release process and what did you do to improve it? My example: at a previous employer all developers made database changes on one common development database. Then when it came to release time, we used Redgate's SQL Compare to generate a huge script from the differences between the Dev and QA databases. This works reasonably well but the problems with this approach are:- ALL changes in the Dev database are included, some of which may still be 'works in progress'. Sometimes developers made conflicting changes (that were not noticed until the release was in production) It was a time consuming and manual process to create and validate the script (by validate I mean, try to weed out issues like problem 1 and 2). When there were problems with the script (eg the order in which things were run such as creating a record which relies on a foreign key record which is in the script but not yet run) it took time to 'tweak' it so it ran smoothly. It's not an ideal scenario for Continuous Integration. So the solution was:- Enforce a policy of all changes to the database must be scripted. A naming convention was important for ensuring the correct running order of the scripts. Create/Use a tool to run the scripts at release time. Developers had their own copy of the database do develop against (so there was no more 'stepping on each others toes') The next release after we started this process was much faster with fewer problems, indeed the only problems found were due to people 'breaking the rules', eg not creating a script. Once the issues with releasing to QA were fixed, when it came time to release to production it was very smooth. We applied a few other changes (like introducing CI) but this was the most significant, overall we reduced release time from around 3 hours down to a max of 10-15 minutes.

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• calloc -- Usefulness of zeroing out memory

  - by chrisgoyal

  Hi, What is the advantage of zeroing out memory (i.e. calloc over malloc)? Won't you change the value to something else anyways? -Chris

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• Configuration Files: how to read them into models?

  - by stacker

  I have a lot of configuration files in this format: <?xml version="1.0" encoding="utf-8"?> <XConfiguration> <XFile Name="file name 1" /> <XFile Name="name2" /> <XFile Name="name3" /> <XFile Name="name4" /> </XConfiguration> I want to use ConfigurationRepository.Get to get this object populated: public class XConfiguration { public XFile[] Files { get; set; } } I wonder what is the best way to do that. LinqToXml? I don't think ConfigurationManager is a smart option for this.

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• Creating Dependencies Only to be able to Unit Test

  - by arin

  I just created a Manager that deals with a SuperClass that is extended all over the code base and registered with some sort of SuperClassManager (SCM). Now I would like to test my Manager that is aware of only the SuperClass. I tried to create a concrete SCM, however, that depends on a third party library and therefore I failed to do that in my jUnit test. Now the option is to mock all instances of this SCM. All is good until now, however, when my Manager deals with the SCM, it returns children of the SuperClass that my Manager does not know or care about. Nevertheless, the identities of these children are vital for my tests (for equality, etc.). Since I cannot use the concrete SCM, I have to mock the results of calls to the appropriate functions of the SCM, however, this means that my tests and therefore my Manager need to know and care about the children of the SuperClass. Checking the code base, there does not seem to be a more appropriate location for my test (that already maintains the appropriate real dependencies). Is it worth it to introduce unnecessary dependencies for the sake of unit testing?

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• Eclipse content assist improvement

  - by kospiotr

  Is it possible to make content assistant work as Netbeans code completion during typing "new "? I mean that Netbeans suggests all possible classes that fit to the type requirements including extending classes. Eclipse suggest only exact classes that fit to the required type. Here is example comparison: http://img12.imageshack.us/img12/360/comparisons.jpg

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• TFS CM resource recommendations / some questions

  - by John

  I am working with a small development shop that consists of a group of 5 developers and 1 QA person. We are using TFS and need to get more sophisticated on how we use this tool. Currently the development team checks in their code each evening. A nightly build runs and pushes the output out on a network share. Our QA person uses this build for testing the next day. Sometimes the build off the trunk codebase has issues/bugs that hinder the QA process, and it hasn’t been a giant issue in the past, but we now want to get to a state where we have our QA person testing on a stable QA build. So I believe we need to create a branch (call it QA), and the developers will continue to develop off the trunk, but the QA person will use builds created from code in the QA branch. Seems simple enough, but we have started doing code reviews as well. So we have another desire in that only code that has been code reviewed can be promoted to the QA branch. Each developer works off a TFS item, and when they check in a changeset, they do it against a TFS item which creates a link between a checked in code file and a TFS item. Eventually the TFS item becomes complete and ready for code review. All code attached to the TFS item is reviewed. How can the versions of these files get promoted to the QA branch? In the QA branch, if a bug is found, we want to fix it in the QA branch and have the changes migrated back to the trunk. I believe TFS has a way to automatically do this doesn’t it? Long story short, we want to get to a build and CM environment that I believe is pretty standard, but we are unaware of how to make this happen with TFS. Given our situation above, can someone point out a book or website(s) that would address our specific needs? We would like to make this happen without having to get too deep in CM theory or TFS. I very much appreciate any and all suggestions! Thanks, John

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• Is the heap actually a heap?

  - by ElectricDialect

  In .NET (and Java as far as I know), the area where objects are dynamically allocated is referred to as the managed heap. However, most documentation that describes how the managed heap works depicts it as a linear data structure, such as a linked list or stack. So, is the managed heap actually a heap, or is it implemented with some other data structure? If it actually does not use a heap data structure, is seems like a significant failure of terminology to overload the meaning of this word. If it is in fact a heap data structure, what is the value that satisfies the heap property: the size of the allocated memory region?

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• Passing an NSDate

  - by Garry

  I'm new to the iPhone and objective-c and I am still trying to get my head around ownership of objects so bear with me. I have a DOBViewController that has a datepicker on it. I have created a custom init method: -(id)initWithInitialDate(NSDate *)initialDate; Another view controller has a date instance declared (NSDate *dob) that holds a value. I would like to pass this to the DOBViewController so that it can scroll the datepicker to the passed value. Here is the custom init method: - (id)initWithInitialDate:(NSDate *)initialDate { // Initialise ourselves self = [super init]; // Set the date of the date picker if (initialDate != nil) { datePicker.date = initialDate; } else { // Set it to today datePicker.date = [NSDate date]; } return self; } This is how I am sending the dob NSDate object: DOBViewController *dobViewController = [[DOBViewController alloc] initWithInitialDate:dob]; Where dob is a variable of type NSDate that is declared in the header file. This doesn't seem to work as initialDate is always NULL. What am I doing wrong?

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• Jquery AJAX and figuring out how NOT to nest callbacks for multiple reloads.

  - by David H

  I have a site with a few containers that need to load content dynamically via AJAX. Most of the links inside of the containers actually load new data in that same container. I.E: $("#navmenu_item1").click(function() { $("#navmenu").load(blah); }); When I click on a link, lets say "logout," and the menu reloads with the updated login status, none of the links now work because I would need to add a new .click into the callback code. Now with repeated clicks and AJAX requests I am not sure how to move forward from here, as I am sure nested callbacks are not optimal. What would be the best way to do this? Do I include the .click event inside the actual AJAX file being pulled from the server, instead of within index.php? Or can I somehow reload the DOM? Thanks for the help!

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• Frameworks to manage dates (effective date and expiry dates)

  - by user214626

  Hello, We have an object that can has an effective date and expiry date.(Ex. i want to maintain the price of a commodity for a time period) Business Rules - Effective date is always a valid date (a datestamp) but, expiry date can be null to indicate that the object is active throughout. Also, both effective and expiry date can be set to some valid dates. Are there any frameworks that manage objects such that the objects are consistent,i.e there are no overlaps of the validity periods ? Ex. class XBOX { double price; Date effectiveDate; Date expiryDate; } XBOX x1 = new XBOX(400$, '2007-01-01','2008-12-31' ); XBOX x2 = new XBOX(200$, '2009-01-01',null ); Assume that we get a new rate from '2010-01-01' and a new XBOX object has to be created (to persist). Is there a framework/pattern that can do the following, so that the XBOX is consistent. x2.setExpiryDate('2009-12-31') XBOX x3 = new XBOX(150$, '2010-01-01',null ); Thanks in advance.

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• How do I reference an unsigned assembly from a VSTO Word Doc project?

  - by Gishu

  I created a new project in VS2008. Project type Visual C# > Office > 2007 > Word 2007 Document Added some code.. got Word to do a few jumps through some custom hoops.. all fine. Now I need to reference another assembly (CopyLocal as false) which is not signed. So I add the project reference. Now the project will not build complaining error MSB3188: Assembly 'X.dll' must be strong signed in order to be marked as a prerequisite. The error code page is concise (now accustomed to this) Been googling and reading posts ever since.. No Luck. How do I get around this ? Or is the hidden commandment that all references (for VSTO?) must be strong named / signed. I cannot sign 'X.dll' and be done with it because it is a binary that I don't control also it depends on another bunch of unsigned dlls.. can't set off a chain sign reaction. Update: Solved the build issue by turning CopyLocal=True. But this meant dumping the referenced X.DLL and all its dependencies into the bin\debug folder... Ughh! Tried creating a subfolder called bin\debug\refExecs and referencing X.dll CopyLocal=false from there. The error message was back.

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• can i expose SSMS 2005 Schema Change Report in sharepoint?

  - by dg

  a schema change was made on a production server that generates feeds to our parters, removing two bytes from a field, which clobbered our partner's jobs. my boss wants a notification mechanism to propagate schema changes to everyone, but instead of writing something, id like to get the schema change history report exposed on sharepoint somehow. is that possible? thanks very much for your help drew

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