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• Breaking changes in .NET 4.0

  - by Andrei Taptunov

  There is a lot of information about new features and classes in new 4.0 however there are also changes that may affect esixting applications, for example Timespan now implements IFormattable and old string.Format() with invalid options will throw exception instead of calling simple ToString(). However, CLR team provides a nice feature to enable behaviour from previous version with configuration setting - TimeSpan_LegacyFormatMode . CLR Inside Out Access to events inside the class where they are declared using += or -= will lead to call add/remove generated accessors that return void. Some code wan't even compile in 4.0. Chris Burrows Blog CAS is deprecated and to enable it one still need to use special setting in configuration - NetFx40_LegacySecurityPolicy So I wonder what are other changes and is it possible to find at least preliminary list of changes that will or may break existing functionality with release of .NET 4.0 ?

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• Windows 64-bit registry v.s. 32-bit registry

  - by George2

  Hello everyone, I heard on Windows x64 architecture, in order to support to run both x86 and x64 application, there is two separate/different sets of Windows registry -- one for x86 application to access and the other for x64 application to access? For example, if a COM registers CLSID in the x86 set of registry, then x64 application will never be able to access the COM component by CLSID, because x86/x64 have different sets of registry? So, my question is whether my understanding of the above sample is correct? I also want to get some more documents to learn this topic, about the two different sets of registry on x64 architecture. (I did some search, but not found any valuable information.) thanks in advance, George

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• Set selection in Dashcode List Controller

  - by wpearse

  I have a list controller in my Dashcode project, it pulls its data from a dynamic source. After my list controller has loaded its data I'd like to set it's selected index to 0 - so that information for the first item in the list is shown. I can't for the life of me figure out how to do this. I've tried: function load() { dashcode.setupParts(); var list = document.getElementById("itemsList"); //list.setSelectionIndexes(0); // nope //list.selectedIndex = 0; // nope }

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• XML Signature in a Web application

  - by OpenDevSoft

  Hi, We are developing an e-Banking web application for a small bank (up to 20000 clients/users). We have to implement digital signatures with X509 certificates (issued by CA on USB tokens) for signing payment information. We tried using CAPICOM but it seems that it is not working well with Windows Vista (have not tried it with Win 7). The other problem is that core banking system can process only Xml digital signatures, so we have to sign XML documents (not just a bulk-formatted text data like with CAPICOM and Win32 Crypto API). So my questions here are: Does anyone of you have similar problem and how did they solved it? Is there a plug-in, library, component or external tool (for Internet Explorer and/or Fire Fox) that supports XML Digital Signatures in a web application? Can you please recommend some of these products and write something about your experience with them? Thank you very much.

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• How to make my iPhone app compatible with iOS 4?

  - by Davide

  Hello, My iphoneos 3.1 based application is not working on iOS 4 GM: the camera is not showing in full screen, it doesn't correctly detects compass information, the uiwebviews doesn't respond to touches (they don't scroll), and so on. It's completely broken! Now my question is: how can I develop an update using the latest xcode with support for ios 4? The latest iOS 4 xcode (3.2.3) doesn't provide any way to develop for iPhoneOS 3.x ("base sdk missing"). By the other side, xcode 3.2.2 would not allow me to debug it on a iOS 4 device, so I can't test it.

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• Visual Studio Package for 2005/2008/2010 ??

  - by asp2go

  We are looking to turn an internal tool we have developed into a Visual Studio Package that we would sell to other developers. The tool will impact the custom editor and/or custom languages. Visual Studio 2010 has redesigned the API's heavily to simplify much of the work involved for these types of integration but the key question we have is: What is the typical adoption pace of new Visual Studio versions? Is there any information out there on adoption rates based on history? How many shops are still using 2005? This will help us to consider whether to target just 2010 using the new APIs or whether trying to go back and support 2008 (maybe 2005) and testing it forward.

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• Root Path Problem in asp.net?

  - by Surya sasidhar

  hi, in my application a link button is there when i click on it it redirect to another page. But when i click on that page it is giving error like this... Cannot use a leading .. to exit above the top directory. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Web.HttpException: Cannot use a leading .. to exit above the top directory.

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• Passing sql results to views hard-codes views to database column names

  - by Galen

  I just realized that i may not be following best practices in regards to the MVC pattern. My issue is that my views "know" information about my database Here's my situation in psuedo code... My controller invokes a method from my model and passes it directly to the view view.records = tableGateway.getRecords() view.display() in my view each records as record print record.name print record.address ... In my view i have record.name and record.address, info that's hard-coded to my database. Is this bad? What other ways around it are there other than iterating over everything in the controller and basically rewriting the records collection. And that just seems silly. Thanks

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• How to group a complex list of objects using LINQ?

  - by Daoming Yang

  I want to select and group the products, and rank them by the number of times they occur. For example, I have an OrderList each of order object has a OrderProductVariantList(OrderLineList), and each of OrderProductVariant object has ProductVariant, and then the ProductVariant object will have a Product object which contains product information. A friend helped me with the following code. It could be compiled, but it did not return any value/result. I used the watch window for the query and it gave me "The name 'query' does not exist in the current context". Can anyone help me? Many thanks. var query = orderList.SelectMany( o => o.OrderLineList ) // results in IEnumerable<OrderProductVariant> .Select( opv => opv.ProductVariant ) .Select( pv => p.Product ) .GroupBy( p => p ) .Select( g => new { Product = g.Key, Count = g.Count() });

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• ASP.NET authentication login and logout with browser back button

  - by Eatdoku

  Hi, I am looking for a solution for user use the browser's back button to navigate to previous page once logged out. I have a web application build in asp.net and using a custom membership provider for authentication and authorization. Everything works fine except when the user click on the logout link to log out of the application and being redirect to a default cover page, if the use click on the BACK BUTTON on their browser, it will actually go back to where they were before and the data will still show up. Of course they can't do anything on that page, click on anything link they will be redirect to a login page again. But having those information display is making a lot users confused. i am just wondering if there is any way i can either clear the browser's history so use can't go BACK, or when they click on the back button and have them redirect to the login page. thanks

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• Passing a SAFEARRAY from C# to COM

  - by SlavaGu

  I use 3rd party COM to find faces in a picture. One of the methods has the following signature, from SDK: long FindMultipleFaces( IUnknown* pIDibImage, VARIANTARG* FacePositionArray ); Parameters: pIDibImage[in] - The image to search. FacePositionArray[out]- The array of FacePosition2 objects into which face information is placed. This array is in a safe array (VARIANT) of type VT_UNKNOWN. The size of the array dictates the maximum number of faces for which to search. which translates into the following C# method signature (from metadata): int FindMultipleFaces(object pIDibImage, ref object pIFacePositions); Being optimistic I call it the following way but get an exception that the memory is corrupt. The exception is thrown only when a face is present in the image. FacePosition2[] facePositions = new FacePosition2[10]; object positions = facePositions; int faceCount = FaceLocator.FindMultipleFaces(dibImage, ref positions); What's the right way to pass SAFEARRAY to unmanaged code?

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• How do I use custom member properties for people on my .NET website

  - by Jordan S

  I am trying to make an asp.net website using Visual web dev and C# that accesses data in an SQL database. For my site, I need to be able to save and access additional user properties such as age and gender. I have been playing around with the built in .NET Login tools but I don't understand how to keep track of the additional properties (age, gender...) I could store all the users information in my own database but how do I correlate the users data in my DB to the usernames in the member database that is automatically created?

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• Eclipse uses 100 % CPU randomly

  - by Florian Gutmann

  Hi everyone! My eclipse sometimes starts using 100 % of my CPU very spontaneously. I can't figure out why it needs that much CPU usage. There is no background task like "building workspace" running. After some time the CPU load drops to 0 and everything is normal. I can't find any information related to the problem in workspace/.metadata/.log file. Has anybody some tip how i can figure out which part of eclipse is using the CPU so heavily? Is there a way to get a thread dump of eclipse? The kill -3 on the eclipse process doesn't do anything. Eclipse Version: Galileo JavaEE Operating System: Linux 2.6.31 Thanks in advance! Florian

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• Java "constant string too long" compile error. Only happens using Ant, not when using Eclipse

  - by Allan

  I have a few really long strings in one class for initializing user information. When I compile in Eclipse, I don't get any errors or warnings, and the resulting .jar runs fine. Recently, I decided to create an ant build file to use. Whenever I compile the same class with ant, I get the "constant string too long" compile error. I've tried a number of ways to set the java compiler executable in ant to make sure that I'm using the exact same version as in Eclipse. I'd rather figure out how to get the same successful compile I get in Eclipse in Ant than try to rework the code to dynamically concatenate the strings.

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• How tp pass textbox value from one webform to a xtrareport ?

  - by ahmed

  Hello, I have a web form where I have a textbox in which the user will enter the number and pull the information from the table. Now I have developed a xtrareport, where I have to display the data of which the user enters in that textbox which I mentioned earlier. Everything works fine , only I need to just pass the value of the texbox(form1) to the report (form2). Now what i need is how to pass the textbox value as a parameter to the report and display the report data of the selected number. Thanking you.

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• Any good card game AI strategies?

  - by Mark

  What would be strategies for writing a good computer opponent for a card game? Most card games are games of incomplete information, so simply mapping out and traversing the game tree as one could do with a board game does not seem too promising. Maybe one could track what open cards are in the game (as soon as they are revealed) and assign probabilities to certain events (e.g. opponent still has 2 cards of clubs). Does anyone have experience with this? Links and directions greatly appreciated. Thanks! -Mark

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• Magento: Rebuilding Flat Catalog Programmatically

  - by karnage

  I am using a cron to import inventory changes nightly. When I try to change a product's information (price, etc) I get the following error: Column not found: 1054 Unknown column 'e.display_price_group_0' in 'field list' I can fix this by clicking "Rebuild Flat Catalog Product" in the Cache Management panel. I setup a cron to do this programmatically using the following code: Mage :: getResourceModel( 'catalog/product_flat_indexer' ) -> rebuild(); I don't get any errors when I run the script, but the "Column not found" error persists. Does anyone know how I can rebuild the flat catalog other than through the admin interface?

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• Bluescreen 0x0000003B during DownloadFileAsync?

  - by SeveQ

  Hello again, I've run into a problem with an application I'm developing in C#/.NET. A problem I can't trace down because it causes my system to crash with a BSOD. Here's the minidump: 060310-27066-01.dmp 03.06.2010 19:47:39 SYSTEM_SERVICE_EXCEPTION 0x0000003b 00000000c0000005 fffff8000306d4d0 fffff8800b107640 0000000000000000 ntoskrnl.exe ntoskrnl.exe+70600 NT Kernel & System Microsoft® Windows® Operating System Microsoft Corporation 6.1.7600.16539 (win7_gdr.100226-1909) x64 C:\Windows\Minidump\060310-27066-01.dmp 4 15 7600 It's not related specifically to DownloadFileAsync. Other methods of the System.Net assembly classes related to HTTP download also make my system crash. I really hope someone can help me with this. Just for info: other apps (browsers etc.) that download files work like a charm. If you need further information don't hesitate to ask! Thanks!

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• Using of html5 <video> tag in web-based applications for iPhone

  - by Alexander Sharov

  As you know iPhone plays video content from < video tags in full-screen mode via internal media player. Here I have several questions: 1) is it possible to show custom text over video playing? something like subtitles appeared during movie playback. I tried several solutions like http://blog.gingertech.net/2008/12/12/attaching-subtitles-to-html5-video/, but seems they are not working in iPhone case. Ideally, I want to add some div over media player and show necessary information there. 2) is there any way to disable controls of iPhone media player. Seams it is not metter if you add "controls" attrinbute to < video tag or don't add, iPhone always switch on controls for media player. The goal for me is do not allow to user to change playback possition(user should see full movie from start to finish. Of course user can stop the video, but he can't rewind a record) Thanks for your help.

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• EXC_BAD_ACCESS due to PostNotification

  - by Sagar Mane

  Hello All, I am facing one issue regarding one module let me clear the flow for the same. I have one customized UITableviewCell. When I am getting some new information I am posting one notification [[NSNotificationCenter defaultCenter] postNotificationName:KGotSomething object:nil userInfo:message]; In view where I am maintaining the table I am initiating a customized cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { cell= [[CustomCell alloc] initWithFrame: reuseIdentifier:identifier document:doc]; return cell; } now in customcell.mm - (id)initWithFrame:(CGRect)frame reuseIdentifier:(NSString *)reuseIdentifier { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(GotSomething:) name:KGotSomething object:nil]; } and in dealloc - (void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self name:KGotSomething object:nil]; } Now my app crashes due to this notification and dealloc is never get called. Can you guys help me, how to get this working or anything I m doing wrong over here... Thanks, Sagar

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• KeyboardWillShow with UITextView

  - by Philip J

  Here's the setup: I have a textView (txtReply) where the user puts information I have a UIView that contains a scroll view and some labels, as well as the textView (ChatView) When the user selects the textView, then it brings the keyboard up. I use 'keyboardWillAppear' to move the 'ChatView' up so that the text view is still visible. I then have a reply button that submits the message, draws it into the ChatView, and calls [textView resignFirstResponder]. However, when I do this, it calls the keyboardWillHide, my view resizes, then the it brings the keyboard back up again. Is there something special you have to do to get the keyboard to stay hidden? Thanks

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• PHP - Is possible to find if user is browsing from beind a Router and get Router Info

  - by Fábio Antunes

  Hello guys. I think it isn't possible just using PHP, but just to be sure. Is it possible for PHP to know if the user is accessing the web from behind a Router? And if yes, how can i get some information about that router, like: Router Name, Brand, Serial Number, ... Users connected in the same network. Can PHP also find the Local IP Address for the visitor in that Network? A few simple questions. To which i haven't found a solid answer, and i tough that some PHP genius could tell me. And teach me. Thanks for your help.

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• What does the obscure javascript error b(e.target).zIndex is not a function mean?

  - by stormist

  To give more information I am using the modular form here: http://jqueryui.com/demos/dialog/#modal-form b(e.target).zIndex is not a function [Break on this error] (function(a){a.widget("ui.mouse",{opti...is._unrotate}return this}})})(jQuery); /js/jquery-ui.min.js I also seem to be getting the error "Too much recursion" too much recursion [Break on this error] 3||a.nodeType===8)){if(a.setInterval&&...this.special[o]||{};if(!t){t=e[o]={}; https://my.dev.peer1.com/js/jquery/jquery-1.4.min.js I know its not much to go on but I was hoping someone might have experience with similar issues.

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• VS 2010 very slow

  - by kaze

  I have just upgraded to VS 2010, and I have performance problems which I did not have before (in VS 2008). The most annoying thing is that it freezes while I work in the text editor. Sometimes when it freezes I see that it is saving auto recovery information, but not always. Almost anything I do gives an unacceptable long delay, like saving, starting to debug, ending debug session, switching between design and code view, and doing WinForms designing. I have some parts of my home directory on a mapped network drive. I suspect that that might be a part of the problem. Is it possible to configure VS 2010 to use exclusively local disk for its "internal" work perhaps? Any hints would be appreciated! Has anyone else experienced these kinds of problems?

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• How to add request validation errors to ModelStateDictionary in ASP.NET MVC?

  - by Morten Christiansen

  Investigating the security of a system I'm building with ASP.NET MVC 2 led me to discover the request validation feature of ASP.NET - a very neat feature, indeed. But obviously I don't just want to present the users with the Yellow Screen of Death when they enter data with HTML in, so I'm out to find a better solution. My idea is to find all the fields that have invalid data and add them to the ModelStateDictionary before invoking the action such that they automatically appear in the UI as error messages. After googling this a bit it appears that no one have implemented this before which I find puzzling since it seems so obvious. Does anyone here have a suggestion on how to do this? My own idea is to supply a custom ControllerActionInvoker to the controller, as described here, that somehow checks for this and modifies the ModelStateDictionary but I'm stuck on how to do this last bit. Just catching HttpRequestValidationException exceptions does not seem a useful approach since it does not actually contain all the information I need.

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