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• SQL Server slow in production environment

  - by Lieven Cardoen

  I have a weird problem in a customer's production environment. I can't give any details on the infrastructure, except that SQL server runs on a virtual server. The data, log and filestream file are on another storage server (data and filestream together and log on a separate server). In our local Test environment, there's one particular query that executes with these durations: first we clear the cache 300ms (First time it takes longer, but from then on it's cached.) 20ms 15ms 17ms In the customer's production environment, the SQL Server is more powerful, these are the durations (I didn't have the rights to clear the cache. Will try this tomorrow). 2500ms 2600ms 2400ms The servers in the customer's production environment are more powerful but they do have virtual servers (we don't). What could be the cause... Not enough memory? Fragmentation? Physical storage? How would you tackle this performance problem? EDIT: Some people have asked me if the data set is equal and it is. I restored their database on our environment. It's true that this was the first thing I looked at. (@Everyone: I added the edit because it will be the first thing that many will think off).

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• [MFC] I can't re-parent a window

  - by John

  Following on from this question, now I have a clearer picture what's going on... I have a MFC application with no main window, which exposes an API to create dialogs. When I call some of these methods repeatedly, the dialogs created are parented to each other instead of all being parented to the desktop... I have no idea why. But anyway even after creation, I am unable to change the parent back to NULL or CWnd::GetDesktopWindow()... if I call SetParent followed by GetParent, nothing has changed. So apart from the really weird question of why Windows is magically parenting each dialog to the last one created, is there anything I'm missing to be able to set these windows as children of the desktop? UPDATED: I have found the reason for all this, but not the solution. From my dialog constructor, we end up in: BOOL CDialog::CreateIndirect(LPCDLGTEMPLATE lpDialogTemplate, CWnd* pParentWnd, void* lpDialogInit, HINSTANCE hInst) { ASSERT(lpDialogTemplate != NULL); if (pParentWnd == NULL) pParentWnd = AfxGetMainWnd(); m_lpDialogInit = lpDialogInit; return CreateDlgIndirect(lpDialogTemplate, pParentWnd, hInst); } Note: if (pParentWnd == NULL)pParentWnd = AfxGetMainWnd(); The call-stack from my dialog constructor looks like this: mfc80d.dll!CDialog::CreateIndirect(const DLGTEMPLATE * lpDialogTemplate=0x005931a8, CWnd * pParentWnd=0x00000000, void * lpDialogInit=0x00000000, HINSTANCE__ * hInst=0x00400000) mfc80d.dll!CDialog::CreateIndirect(void * hDialogTemplate=0x005931a8, CWnd * pParentWnd=0x00000000, HINSTANCE__ * hInst=0x00400000) mfc80d.dll!CDialog::Create(const char * lpszTemplateName=0x0000009d, CWnd * pParentWnd=0x00000000) mfc80d.dll!CDialog::Create(unsigned int nIDTemplate=157, CWnd * pParentWnd=0x00000000) MyApp.exe!CMyDlg::CMyDlg(CWnd * pParent=0x00000000)

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• Need some help for the issues that caused because of secret key in rails application

  - by sam

  I have a weird problem. I have a rails application. When I am trying to run the ruby script/about command, it is displaying the details when the secret key in config/initializers/session_store.rb was removed or commented. When I place the secret key in the file and if i runs the ruby script/about command it is throwing error as c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependenc es.rb:443:in `load_missing_constant': uninitialized constant ActionController ( ameError) from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_supp rt/dependencies.rb:80:in `const_missing' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_supp rt/dependencies.rb:92:in `const_missing' from D:/chat/config/initializers/session_store.rb:13 from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `g m_original_require' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `r quire' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_supp rt/dependencies.rb:156:in `require' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_supp rt/dependencies.rb:521:in `new_constants_in' from c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_supp rt/dependencies.rb:156:in `require' ... 7 levels... from c:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/about.rb:1 from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `g m_original_require' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `r quire' from script/about:3 In config/initializers/session_store.rb file the error is shown for the below code. ActionController::Base.session = { :key => '_chat_session', :secret => '0fb230c7ae72f9a0cb2417b0ad75db3b48cabf327eeedb0557ae07ecf894f34f55e2dfb9ce6c49f05959ceac9812a7193de04690a931fcf757973195a84cd2d2' } Could anyone please help me. Thanks in-advance, sam

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• Android RestTemplate Ok on emulator but fails on real device

  - by Hossein

  I'm using spring RestTemplate and it works perfect on emulator but if I run my app on real device I get HttpMessageNotWritableException ............ nested exception is java.net.SocketException: Broken pipe Here is some lines of my code(keep in mind my app works perfect on emulator) ............ LoggerUtil.logToFile(TAG, "url is [" + url + "]"); LoggerUtil.logToFile(TAG, "NetworkInfo - " + connectivityManager.getActiveNetworkInfo()); ResponseEntity<T> responseEntity = restTemplate.exchange(url, HttpMethod.POST, requestEntity, clazz); ............. I know my device's network works perfect because all other applications on my device are working and also using device browser I'm able to connect to my server so my server is available. My server is up and running and my device is able to connect to my server so why I get java.net.SocketException: Broken pipe ?!!!!!!! Before I call restTemplate.exchange() I log NetworkInfo and it looks ok -type: WIFI -status: CONNECTED/CONNECTED -isAvailable: true Thanks in advance. Update: It is really weird Even if I use HttpURLConnection, it works perfectly on emulator but on real device I get 400 Bad Request Here is my code HttpURLConnection con = null; try { String url = ....; LoggerUtil.logToFile(TAG, "url [" + url + "]" ); con = (HttpURLConnection) new URL(url).openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("Connection", "Keep-Alive"); con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); con.connect(); LoggerUtil.logToFile(TAG, "con.getResponseCode is " + con.getResponseCode()); LoggerUtil.logToFile(TAG, "con.getResponseMessage is " + con.getResponseMessage()); } catch(Throwable t){ LoggerUtil.logToFile(TAG, "*** failed [" + t + "]" ); } in log file I see con.getResponseCode is 400 con.getResponseMessage is Bad Request

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• JDBC Null pointer Exception thrown

  - by harigm

  Hi I'm getting nullpointerexception at rs.next() or rs.getString(1) it is really weird that sometimes rs.next() works fine and it throws nullpointerexception at rs.getString("PRODUCTCODE"),sometimes it throws npe at rs.getString("PRODDATE") i dont understand why rs.getString() thows npe while rs.next() works fine Here is my code { ResultSet rs = null; String query = ""; BarcodeBean bi = null; try { query = "SELECT * FROM TABLE(GET_BARCODEINFO('"barcode.trim()"'))"; statement = connection.createStatement(); Logger.getInstance().getLogger().logInfo(query); rs = statement.executeQuery(query); bi = new BarcodeBean(); if (rs == null){ if(rs.next()){ bi.setUrunKodu(rs.getString("PRODUCTCODE")); bi.setImalatMakineKodu(rs.getString("PRODMACHINECODE")); bi.setOperatorSicilNo(rs.getString("OPERATORID")); bi.setImalatTarihi(rs.getString("PRODDATE")); bi.setImalatVardiyasi(rs.getString("PRODSHIFT")); bi.setSeriNumarasi(rs.getString("SERIALNUMBER")); bi.setSirtTarihi(rs.getString("SIRTTARIHI")); } } } catch (SQLException e) { e.printStackTrace(); throw e; } catch (Exception e) { e.printStackTrace(); } finally { DatabaseUtility.close(rs); DatabaseUtility.close(statement); } }

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• Redirect on Ajax Jquery Call

  - by Mark Estrada

  Hi, I am newbie to ajax here and I know somebody would have encountered this problem already. I have a legacy app built on Spring MVC, it has a interceptor(filter) that redirects the user to the login page whenever there is no session. public class SessionCheckerInterceptor extends HandlerInterceptorAdapter { public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HttpSession session = request.getSession(); // check if userInfo exist in session User user = (User) session.getAttribute("user"); if (user == null) { response.sendRedirect("login.htm"); return false; } return true; } } For non-xmlhttp request, this works fine.. but when I try to use ajax in my application, everything gets weird, it is not able to redirect to the login page correctly. As check the value of the xhr.status = 200 textStatus = parseError errorThrown = "Invalid JSON -Markup of my HTML Login Page- $(document).ready(function(){ jQuery.ajax({ type: "GET", url: "populateData.htm", dataType:"json", data:"userId=SampleUser", success:function(response){ //code here }, error: function(xhr, textStatus, errorThrown) { alert('Error! Status = ' + xhr.status); } }); }); I checked on my firebug that there is a 302 HTTP response but I am not sure how to catch the response and redirect the user to the login page. Any idea here? Thanks.

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• what type of bug causes a program to slowly use more processor power and all of a sudden go to 100%?

  - by reinier

  Hi, I was hoping to get some good ideas as to what might be causing a really nasty bug. This is a program which is transmitting data over a socket, and also receives messages back. I could explain lots more, but I don't think this will help here. I'm just searching for hypothetical problems which can cause the following behaviour: program runs processor time slowly accumulates (till around 60%) all of a sudden (could be after 30 but also after 60 seconds) the processor time shoots to 100%. the program halts completely In my syslog it always ends on one line with a memory allocation (something similar to: myArray = new byte[16384]) in the same thread. now here is the weird part: if I set the debugger anywhere...it immediately stops on that line. So just the act of setting a breakpoint, made the thread continue (it wasn't running since I saw no log output anymore) I was thinking 'deadlock' but that would not cause 100% processor power. If anything, the opposite. Also, setting a breakpoint would not cause a deadlock to end. anyone else a theoretical suggestion as to what kind of 'construct' might cause this effect? (apart from 'bad programming') ;^) thanks EDIT: I just noticed.... by setting the sendspeed slower, the problem shows itself much later than expected. I would think around the same amount of packets send...but no the amount of packets send is much higher this way before it has the same problem.

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• dll's loaded through reflection - Phantom Bug

  - by Seattle Leonard

  Ok, I got a strange one here and I want to know if any of you have ever run accross anything like it. So I've got this web app that loads up a bunch of dll's through reflection. Basically it looks for Types that are derived from certain abstract types and adds them to the list of things it can make. Here's the weird part. While developing there is never a problem. When installing it, there is never a problem to start with. Then, at a seemingly random time, the application breaks while trying to find all the types. I've had 2 sites sitting side by side and one worked while the other did not, and they were configured exactly(and I mean exactly) the same. IISRESET's never helped, but this did: I simply moved all the dll's out of the bin directory then moved them back. That's right I just moved them out of the bin directory then put them right back where they came from and everything worked fine. Any ideas? Got some more info When the site is working I notice this behavior: After IISRESET it still works, but recycling the app pool will cause it to break. When the site is broken: Neiter IISRESET nor recycling the app pool fixes it, but moving a single dll out then back in fixes it.

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• Paypal subscriptions IPN - problem with users subscribing multiple times

  - by Brian Armstrong

  I'm using paypal subscriptions and the instant payment notification (IPN) to handle subscribers on my site. For the most part it works well but there is one occasional problem I've encountered. Usually if a user cancels their subscription, I wait for the "end of term" (subscr_eot) notification before disabling access to my site. So if they prepay for the whole month, and then cancel right away, they still have access for the rest of the month (as it should be). But some users are having this problem where they: Cancel their subscription Before the "end of term" is reached they decide to re-subscribe When the "end of term" is reached for their first subscription, my app receives the notification and fires off an email to the user with something like "your account has been disabled, if you ever want to sign up again, you can re-subscribe by clicking here". This confuses them because they are thinking...that's weird, I thought I subscribed like a week ago (and they did). So they go subscribe AGAIN. Now they have two concurrent running subscriptions to my site and I get a support email in a month or two ("wtf you billed me twice this month jerk!!") So I haven't found a good way to fix this. I guess the best solution would be to do an additional API call when the "end of term" notification is received which asks paypal "hey did this person already re-subscribe?". If so then no need to fire off that email. But I haven't seen any way to do this API call yet. Another solution is to disable their account immediately when they cancel (the "subscr_cancel" notification) but then I get different angry support emails "hey I prepaid for the whole month why was my account disabled already!!". Anyone else solved this?

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• Strange xml/html accent issue

  - by Ayrad

  I have an XML file that contains a message with html tags in it. The XML file is read by a java class that mails it to people. When the mail is received, the accents do not show. For example é doesn't show. I have tried &eacute; in the xml but it gives an error in eclipse saying that the entity has not been declared. I also tried simply inserting &#233; but that shows nothing in the final output. The 3rd thing I tried was using <![CDATA[é]]> but that broke the parser since it didn't output anything after it. However I noticed something weird. When i put something like this in the xml and added UTF-16 encoding <message>text bla bla blaa é&lt; it did ouput the é at the end like this bla bla blaa blaa é. EDIT <message>text bla bla blaa éé&lt; outputs ?é or just one é The file looks something like this: <?xml version="1.0"? encoding="UTF-16"> <message> &lt;b&gt;hello é &lt;/b&gt; </message> </xml> What gives?

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• Administrator's shortcut to batch file with double quoted parameters

  - by XXB

  Take an excruciatingly simple batch file: echo hi pause Save that as test.bat. Now, make a shortcut to test.bat. The shortcut runs the batch file, which prints "hi" and then waits for a keypress as expected. Now, add some argument to the target of the shortcut. Now you have a shortcut to: %path%\test.bat some args The shortcut runs the batch file as before. Now, run the shortcut as administrator. (This is on Windows 7 by the way.) You can use either right-click - Run as Administrator, or go to the shortcut's properties and check the box in the advanced section. Tell UAC that it's okay and once again the shortcut runs the batch file as expected. Now, change the arguments in the target of the shortcut to add double quotes: %path%\test.bat "some args" Now try the shortcut as administrator. It doesn't work this time! A command window pops up and and disappears too fast to see any error. I tried adding test.log 2&1 to the shortcut, but no log is created in this case. Try running the same shortcut (with the double quotes) but not as Administrator. It runs the batch file fine. So, it seems the behavior is not because of the double quoted parameters, and it's not because it's run as Administrator. It's some weird combination of the two. I also tried running the same command from an administrator's command window. This ran the batch file as expected without error. Running the shortcut from the command window spawned a new command window which flashed and went away. So apparently the issue is caused by a combination of administrator, the shortcut, and the double quotes. I'm totally stumped, does anyone have any idea what's going on?

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• Raytracing (LoS) on 3D hex-like tile maps

  - by herenvardo

  Greetings, I'm working on a game project that uses a 3D variant of hexagonal tile maps. Tiles are actually cubes, not hexes, but are laid out just like hexes (because a square can be turned to a cube to extrapolate from 2D to 3D, but there is no 3D version of a hex). Rather than a verbose description, here goes an example of a 4x4x4 map: (I have highlighted an arbitrary tile (green) and its adjacent tiles (yellow) to help describe how the whole thing is supposed to work; but the adjacency functions are not the issue, that's already solved.) I have a struct type to represent tiles, and maps are represented as a 3D array of tiles (wrapped in a Map class to add some utility methods, but that's not very relevant). Each tile is supposed to represent a perfectly cubic space, and they are all exactly the same size. Also, the offset between adjacent "rows" is exactly half the size of a tile. That's enough context; my question is: Given the coordinates of two points A and B, how can I generate a list of the tiles (or, rather, their coordinates) that a straight line between A and B would cross? That would later be used for a variety of purposes, such as determining Line-of-sight, charge path legality, and so on. BTW, this may be useful: my maps use the (0,0,0) as a reference position. The 'jagging' of the map can be defined as offsetting each tile ((y+z) mod 2) * tileSize/2.0 to the right from the position it'd have on a "sane" cartesian system. For the non-jagged rows, that yields 0; for rows where (y+z) mod 2 is 1, it yields 0.5 tiles. I'm working on C#4 targeting the .Net Framework 4.0; but I don't really need specific code, just the algorithm to solve the weird geometric/mathematical problem. I have been trying for several days to solve this at no avail; and trying to draw the whole thing on paper to "visualize" it didn't help either :( . Thanks in advance for any answer

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• Confused with an ASP.NET/WCF WSDL Parsing Error

  - by Vaccano

  I have a WCF Web Service that my ASP.NET app uses. It has been working fine for quite some time. I just added in a Dev Express Grid (and the Dev Express DLLs) and a new page that uses them and now I am getting parsing errors on the WSDL. But the weird part is that it works fine on my machine but fails on the web server machine. (Both are connecting to the same web services WSDL.) Here is the error message I am getting: Server Error in '/MyWebAppWebDev' Application. -------------------------------------------------------------------------------- Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Reference.svcmap: Failed to generate code for the service reference 'MyWebAppService'. Cannot import wsdl:portType Detail: An exception was thrown while running a WSDL import extension: System.ServiceModel.Description.DataContractSerializerMessageContractImporter Error: Referenced type 'WebClientApp.MyWebAppService.ReferenceUpdatesDataContract, WebClientApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' with data contract name 'ReferenceUpdatesDataContract' in namespace 'http://schemas.datacontract.org/2004/07/MyWebAppServiceLibrary.DataContracts' cannot be used since it does not match imported DataContract. Need to exclude this type from referenced types. XPath to Error Source: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:portType[@name='IMyWebAppReferenceDataServiceLib'] Cannot import wsdl:binding Detail: There was an error importing a wsdl:portType that the wsdl:binding is dependent on. XPath to wsdl:portType: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:portType[@name='IMyWebAppReferenceDataServiceLib'] XPath to Error Source: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:binding[@name='MyWebAppServicesDefaultEndpoint'] Cannot import wsdl:port Detail: There was an error importing a wsdl:binding that the wsdl:port is dependent on. XPath to wsdl:binding: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:binding[@name='MyWebAppServicesDefaultEndpoint'] XPath to Error Source: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:service[@name='MyWebAppReferenceDataServiceLib']/wsdl:port[@name='MyWebAppServicesDefaultEndpoint'] Source Error: [No relevant source lines] Source File: /MyWebAppWebDev/App_WebReferences/MyWebAppService/ Line: 1 I am completely stumped on this. I have checked my web.config endpoint address and it is spot on (and notably is not in the error message above). Any ideas would be welcomed.

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• ResolveUrl Problem in Master Page

  - by Tarik

  Okay, I know it is weird but when I put this code between <head runat="server"></head> in master.page, this is how it renders into: <link id="ctl00_Link1" rel="shortcut icon" href="../%3C%25%20ResolveUrl(%22~/Resources/Pictures/Shared/Misc/favicon.ico%22);%20%25%3E" type="image/x-icon" /> It doesn't see something asp.net needs to take care of. This is the original code : <link id="Link1" rel="shortcut icon" href='<%=ResolveUrl("~/Resources/Pictures/Shared/Misc/favicon.ico") %>' type="image/x-icon" runat="server" /> Basically Asp.Net doesn't take care of the code below and renders as a normal html. How can I get over this problem? Thanks in advance... Edit and Resolved Okay people, there is no way for doing this. I've finally figured out because ResolveUrl or ResolveClientUrl is only working for these below : @import '<%= ResolveUrl("~/Resources/Styles/MainMaster/MainDesign.css") %>'; <script src='Resources/Scripts/Libraries/jquery-1.4.2.js' type="text/javascript"</script> it is too literal for link so you need to put link elements in body tag like : <body> <link id="iconOne" rel="shortcut icon" type="image/x-icon" href="Resources/Pictures/Shared/Misc/favicon.ico"/> <link id="iconTwo" rel="icon" href='Resources/Pictures/Shared/Misc/favicon.ico' type="image/ico" /> </body>

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• MAPI_E_NOT_FOUND on OpenMsgStore

  - by Jan Gressmann

  Hi, I'm trying to open the MessageStore of a user using MAPI. The weird thing is, when I run this a console application, while I'm logged with the user, everything works fine. But when I run this as a Windows Service I get MAPI_E_NOT_FOUND when trying to open the MessageStore. I already configured the service to run as the user. MapiLogonEx seems to work fine and GetMsgStoreTables also gives me the correct results (I verfied that the EntryID of the MessageStore is correct). Here's my code: LPMAPITABLE pStoresTbl = NULL; m_lpMAPISession->GetMsgStoresTable(0, &pStoresTbl); // Query Collumns LPSPropTagArray pTags = NULL; LPSRowSet pRows = NULL; pStoresTbl->SeekRow(BOOKMARK_BEGINNING,0,NULL); pStoresTbl->QueryRows( LONG_MAX, NULL, &pRows); LPSBinary lpEntryID = NULL; ULONG iprops; for (iprops = 0; iprops < pRows->aRow[0].cValues; iprops++) { SPropValue sProp = pRows->aRow[0].lpProps[iprops]; if (PROP_ID(sProp.ulPropTag) == PROP_ID(PR_ENTRYID)) { lpEntryID = &sProp.Value.bin; break; } } lpMDB = NULL; HRESULT hres = m_lpMAPISession->OpenMsgStore(NULL, lpEntryID->cb, (LPENTRYID) lpEntryID->lpb, NULL, MDB_NO_DIALOG | MDB_NO_MAIL | // spooler not notified of our presence MDB_TEMPORARY | // message store not added to MAPI profile MAPI_BEST_ACCESS, &lpMDB);

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• - (void)keyboardWasShown not called when switching to another UITextField

  - by Shawn

  I'm having a strange problem that I don't understand. I have a UIScrollView with several UITextField objects. When I switch to the view, I set the first UITextField as firstresponder, and the keyboardWasShown method gets called due to the UIKeyboardDidShowNotification that the view is registered for. The weird thing is, when I touch the next UITextField, the keyboardWasShown method is not called. I don't understand this, since Apple's documentation says "If your interface has multiple text fields, the user can tap between them to edit the values in each one. When that happens, however, the keyboard does not disappear but the system does still generate UIKeyboardDidShowNotification notifications each time editing begins in a new text field." My code I've copied directly from Apple's documentation as well, and it works properly, but it only gets called the first time. What am I missing? - (void)registerForKeyboardNotifications { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasHidden:) name:UIKeyboardDidHideNotification object:nil]; } - (void)keyboardWasShown:(NSNotification *)aNotification { //if (keyboardShown) return; NSDictionary* info = [aNotification userInfo]; CGSize kbSize = [[info objectForKey:UIKeyboardBoundsUserInfoKey] CGRectValue].size; CGRect bkgndRect = activeField.superview.frame; bkgndRect.size.height += kbSize.height; [activeField.superview setFrame:bkgndRect]; [scrollView setContentOffset:CGPointMake(0.0, activeField.frame.origin.y) animated:YES]; keyboardShown = YES; UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(done)]; self.navigationItem.rightBarButtonItem = doneButton; [doneButton release]; }

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• UINavigationController creating a blank view out of thin air?

  - by Alex Gosselin

  Ok, this one is really weird... I can't show code for it exactly cause it follows a pretty snake-like pattern through subclasses etc, there would be a pile of it. The important parts are that I push a view controller, which during viewWillAppear pushes another view controller onto the nav controller. My nav controller is an item in a tab bar. When I press back twice, I wind up at a blank view with the same title as my root view controller, (I have no other views having this title). I even tested and put a NSLog() in viewWillAppear to make sure it was the same view appearing, but for some reason the mystery blank view is showing up instead of my view. I am able to get the original view back by pressing the button on the tab bar again. (The one that corresponds to the nav controller). This confuses me greatly, so any help would be appreciated. I will post code if somebody could narrow down what code to put. Thanks.

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• Environment variable names with parentheses, like %ProgramFiles(x86)%, in PowerShell?

  - by jwfearn

  How does one get the value of environment variable whose name contains parentheses in a PowerShell script? To complicate matters, some variables names contains parentheses while others have similar names without parenteses. For example (using cmd.exe): C:\>set | find "ProgramFiles" CommonProgramFiles=C:\Program Files\Common Files CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files ProgramFiles=C:\Program Files ProgramFiles(x86)=C:\Program Files (x86) We see that %ProgramFiles% is not the same as %ProgramFiles(x86)%. My PowerShell code is failing in a weird way because it's ignoring the part of the environment variable name after the parentheses. Since this happens to match the name of a different, but existing, environment variable I don't fail, I just get the right value of the wrong variable. Here's a test function in the PowerShell scripting language to illustrate my problem: function Do-Test { $ok = "C:\Program Files (x86)" # note space between 's' and '( $bad = "$Env:ProgramFiles" + "(x86)" # uses %ProgramFiles% $bin32 = "$Env:ProgramFiles(x86)" # LINE 6, I want to use %ProgramFiles(x86)% if ( $bin32 -eq $ok ) { Write-Output "Pass" } elseif ( $bin32 -eq $bad ) { Write-Output "Fail: %ProgramFiles% used instead of %ProgramFiles(x86)%" } else { Write-Output "Fail: some other reason" } } And here's the output: PS> Do-Test Fail: %ProgramFiles% used instead of %ProgramFiles(x86)% Is there a simple change I can make to line 6 above to get the correct value of %ProgramFiles(x86)%? *NOTE: In the text of this post I am using batch file syntax for environment variables as a convenient shorthand. For example %SOME_VARIABLE% means "the value of the environment variable whose name is SOME_VARIABLE". If I knew the properly escaped syntax in PowerShell, I wouldn't need to ask this question.*

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• Why does Http Web Request and IWebProxy work at wierd times

  - by Mike Webb

  Another question about Web proxy. Here is my code: IWebProxy Proxya = System.Net.WebRequest.GetSystemWebProxy(); Proxya.Credentials = CredentialCache.DefaultNetworkCredentials; HttpWebRequest rqst = (HttpWebRequest)WebRequest.Create(targetServer); rqst.Proxy = Proxya; rqst.Timeout = 5000; try { rqst.GetResponse(); } catch(WebException wex) { connectErrMsg = wex.Message; proxyworks = false; } This code fails the first time it is called. After that on successive calls it works sometimes, but not others. It also never hits the catch block. Now the weird part. If I add a MessageBox.Show(msg) call in the first section of code before the GetResponse() call this all will work every time. Here is an example: try { // ========Here is where I make the call and get the response======== System.Windows.Forms.MessageBox.Show("Getting Response"); // ========This makes the whole thing work every time======== rqst.GetResponse(); } catch(WebException wex) { connectErrMsg = wex.Message; proxyworks = false; } I'm baffled about why it is behaving this way. I don't know if the timeout is not working (it's in milliseconds, not seconds, so should timeout after 5 seconds, right?...) or what is going on. The most confusing this is that the message box call makes it all work. So any help and suggestions on what is happening is appreciated. These are the kind of bugs that drive me absolutely out of my mind.

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• Windows-mobile app won't run after being closed by Task Manager

  - by pithyless

  I've inherited some windows-mobile code that I've been bringing up-to-date. I've come across a weird bug, and I was hoping that even though a bit vague, maybe it will spark someone's memory: Running the app (which is basically a glorified Forms app with P/Invoke gps code), I switch to the task manager, and close the app via End Task. Seems to exit fine (no errors and disappears from Task Manager). Unfortunately, the app refuses to start a second time until I reboot the phone or reinstall the CAB. What's worse: this bug is reproducible on a HTC Diamond, but works fine (ie. can run again after EndTask) on an HTC HD2. The only thing I can think of is some kind of timing race between a Dispose() and the Task Manager. Any ideas? I'm also thinking of a workaround - I do have a working "Exit Application" routine that correctly cleans up the app; can I catch the EndTask event in the c# code in order to complete a proper cleanup? Maybe I'm just missing the pain point... all ideas welcome :)

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• Passing html parameters to server odd problem

  - by StealthRT

  Hey all i am having a weird problem with sending data back to my server. This is the code i am using: NSString *theURL =[NSString stringWithFormat:@"http://www.xxx.com/confirm.asp?theID=%@&theName=%@&empID=%@&theComp=%@", theConfirmNum, tmpNBUserRow.userName, labelTxt.text, theID]; NSLog(@"%@,%@,%@,%@", theConfirmNum, tmpNBUserRow.userName, labelTxt.text, theID); NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:theURL]]; [request setHTTPMethod:@"POST"]; NSError *error; NSURLResponse *response; NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSString *data=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding]; if ([data isEqualToString:@"Done"]) I can run the code from the browser and it works just fine using the data i got from the NSLog output. The NSLog output for each value is correct. But for some reason when i put a break on the IF ([data isEqualToString:@"Done"]) it has no return value. I checked each value for what it was sending (and again, it was correct in the NSLog output) and i found that the value "theID" said "Out of scope". Although, again, the NSLog had the value in it correctly? So i searched the forum and found a simular problem. I took their advice and added "RETAIN" to the "theID" value like so: theID = [customObjInstance TID]; [theID retain]; However, that did not solve the issue... Here is the console NSLog output: [Session started at 2010-04-11 01:31:50 -0400.] wait_fences: failed to receive reply: 10004003 wait_fences: failed to receive reply: 10004003 nbTxt(5952,0xa0937500) malloc: *** error for object 0x3c0ebc0: double free *** set a breakpoint in malloc_error_break to debug 2010-04-11 01:32:12.270 nbTxt[5952:207] 5122,Rob S.,5122,NB010203 The NSLog values i am sending is the last line "5122,Rob S.,5122,NB010203" Any help would be great :o) David

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• LaTeX indentation (formatting) in Emacs

  - by nkuyu

  Hi, what is the correct way to do indentation of a LaTeX document in Emacs (AucTex)? For example when I have a list: \begin{itemize} \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \end{document} and would like to ended up with: \begin{itemize} \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \end{document} I tried indent-region but it doesn't do anything and the LaTeX-fill-* produces weird results like: \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \item orem ipsum dolor sit amet, consectetur adipiscing elit. Aliquam enim urna, mattis eu aliquet eget, condimentum id nibh. In hac habitasse platea dictumst. \end{document} Thanks!

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• multi thread apps crashes in release mode

  - by etzarfat

  Hello, I'm using Visual Studio 2008 (programming in c). I've a weird problem I worte a program that has 2 threads that runs simultaneously, a recording thread (using audio card to record into memory) and a translation thread (using a speech engine to recognize the words). when I run my program in debug mode (aka setting a breakpoint in the code) it runs great, however when I run in debug mode or release mode (outside the visual studio enviroment) it crashes and give me the following exception: "Unhandled exception at 0x7c911129 in LowLevel.exe: 0xC0000005: Access violation reading location 0x014c7245." My stack looks: LowLevel.exe!__set_flsgetvalue() Line 256 + 0xc bytes C LowLevel.exe!_isleadbyte_l(int c=4359676, localeinfo_struct * plocinfo=0x00000001) Line 57 C++ 014b00d8() LowLevel.exe!PlayDateOfExam(int option=1) Line 2240 + 0x7 bytes C++ LowLevel.exe!NSCThread(void * arg=0x00000000) Line 1585 + 0xb bytes C++ kernel32.dll!7c80b729() winmm.dll!76b5b294() I uses the following file in my project "nsc.lib" and WinMM.lib" I'm not really familiar with threads I used a sample (which works great) and built on it. I saw a similiar question year on the forum but I didn't really understand the answers since I'm not familiar with with threads. Can someone help me? Thanks

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• PHP File upload fails with blank screen when size exceeds 742 KB.

  - by user284839

  Hi friends, This is one of the most bizarre errors I've come across. So I've written a little file upload web app for my friend and it works fine for any file less than or equal to 742kB in size. Needless to say, I arrived at this precise number based on relentless testing. Weird part is that if the file size is just a few KB more, for example 743 or 750, I get an error saying "MySQL has gone away". But if it is 1MB or more, then I just get a blank screen. And it happens in less than 2 seconds after I hit the upload button. So it doesn't look like a time-out to me. I checked out the PHP.ini file for post size and upload size, they are all set to 5 MB or more. And the timeout is set to 60 seconds. The uploaded file sits in MySQL database in a field of datatype mediumblob. I tried changing that to longblob. But that didn't help either. Any help? Thanks for reading, Girish

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• Implement System.Web.Caching.Cache Object in a controller to cache specific query

  - by Julien

  Hello World! I'm Julien and I have a question is it correct to implement my caching object like this in my controller : public class HomeController : BaseController { public static Cache cachingControl = new Cache(); ... And I Use it like this : public ActionResult Home() { IndexViewData view = new IndexViewData(); view.UserId = UserId; if (cachingControl.Get("viewHome") != null) { view = (IndexViewData)cachingControl.Get("viewHome"); } else { view.allAdsList = AllAds(5000, 0); if (Request.QueryString["voirTous"] != null) view.loadGeneral(true); else view.loadGeneral(false); cachingControl.Insert("viewHome", view); } view.adsList = SetupSearch(5, false, 0); return View(view); } But When I Call this line : if (cachingControl.Get("viewHome") != null) { They trow me the error NullErrorException But I know it can be null this is why i'm put this condition to Do you have an alternative or a tips for me thank you! P.S.: I Know that the code is weird :P but I must to support it ... Julien

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