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• Reset or clear the UIView from UILabels

  - by Nicsoft

  Hello, I have created an UIView on which I have a number of labels and I'm also drawing some lines in the same UIView. Sometimes I update the lines that I'm drawing. Now, the problem I am having is that when I update the lines, they get drawn according to my wish. But the labels are overwriting themselves. This shouldn't have been a problem if it wasn't for that the position is changed about 1 pixel and that makes the text go blurry. I don't know how to remove the labels before they are redrawn. I do remove the labels from the superview and add them back when drawRect is called, but the SetNeedDisplay doesn't clear the screen before the graphic is updated, I guess (I think I read that SetNeedsDisplay/drawRect doesn't clear the screen, just updating the content. Couldn't find the text now while searching)? What is the pattern to use here, should I create a retangle with the size of the screen (or the area where the labels are) and fill it with the background colour, or is there any other way to clear or reset the UIView (I don't want to release and create the UIView again). The view is created in IB and associated with a custom UIView. In IB I add some buttons and other static labels. The above labels and graphics is created programatically. Any comments would be helpful! Thanks in advance!

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• Understanding ItemsSource and DataContext in a DataGrid

  - by Ben McCormack

  I'm trying to understand how the ItemsSource and DataContext properties work in a Silverlight Toolkit DataGrid. I'm currently working with dummy data and trying to get the data in the DataGrid to update when the value of a combo box changes. My MainPage.xaml.vb file currently looks like this: Partial Public Class MainPage Inherits UserControl Private IssueSummaryList As List(Of IssueSummary) Public Sub New() GetDummyIssueSummary("Day") InitializeComponent() dgIssueSummary.ItemsSource = IssueSummaryList 'dgIssueSummary.DataContext = IssueSummaryList ' End Sub Private Sub GetDummyIssueSummary(ByVal timeInterval As String) Dim lst As New List(Of IssueSummary)() 'Generate dummy data for lst ' IssueSummaryList = lst End Sub Private Sub ComboBox_SelectionChanged(ByVal sender As System.Object, ByVal e As System.Windows.Controls.SelectionChangedEventArgs) Dim cboBox As ComboBox = CType(sender, ComboBox) Dim cboBoxItem As ComboBoxItem = CType(cboBox.SelectedValue, ComboBoxItem) GetDummyIssueSummary(cboBoxItem.Content.ToString()) End Sub End Class My XAML currently looks this for the DataGrid: <sdk:DataGrid x:Name="dgIssueSummary" AutoGenerateColumns="False" > <sdk:DataGrid.Columns> <sdk:DataGridTextColumn Binding="{Binding ProblemType}" Header="Problem Type"/> <sdk:DataGridTextColumn Binding="{Binding Count}" Header="Count"/> </sdk:DataGrid.Columns> </sdk:DataGrid> The problem is that if I set the value of the ItemsSource property of the data grid equal to IssueSummaryList, it will display the data when it loads, but it won't update when the underlying IssueSummaryList collection changes. If I set the DataContext of the grid to be IssueSummaryList, no data will be displayed when it renders. I must not understand how ItemsSource and DataContext are supposed to function, because I expect one of those properties to "just work" when I assign a List object to them. What do I need to understand and change in my code so that as data changes in the List, the data in the grid is updated?

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• Mathematically Find Max Value without Conditional Comparison

  - by Cnich

  ----------Updated ------------ codymanix and moonshadow have been a big help thus far. I was able to solve my problem using the equations and instead of using right shift I divided by 29. Because with 32bits signed 2^31 = overflows to 29. Which works! Prototype in PHP $r = $x - (($x - $y) & (($x - $y) / (29))); Actual code for LEADS (you can only do one math function PER LINE!!! AHHHH!!!) DERIVDE1 = IMAGE1 - IMAGE2; DERIVED2 = DERIVED1 / 29; DERIVED3 = DERIVED1 AND DERIVED2; MAX = IMAGE1 - DERIVED3; ----------Original Question----------- I don't think this is quite possible with my application's limitations but I figured it's worth a shot to ask. I'll try to make this simple. I need to find the max values between two numbers without being able to use a IF or any conditional statement. In order to find the the MAX values I can only perform the following functions Divide, Multiply, Subtract, Add, NOT, AND ,OR Let's say I have two numbers A = 60; B = 50; Now if A is always greater than B it would be simple to find the max value MAX = (A - B) + B; ex. 10 = (60 - 50) 10 + 50 = 60 = MAX Problem is A is not always greater than B. I cannot perform ABS, MAX, MIN or conditional checks with the scripting applicaiton I am using. Is there any way possible using the limited operation above to find a value VERY close to the max?

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• Fluent interface design and code smell

  - by Jiho Han

  public class StepClause { public NamedStepClause Action1() {} public NamedStepClause Action2() {} } public class NamedStepClause : StepClause { public StepClause Step(string name) {} } Basically, I want to be able to do something like this: var workflow = new Workflow().Configure() .Action1() .Step("abc").Action2() .Action2() .Step("def").Action1(); So, some "steps" are named and some are not. The thing I do not like is that the StepClause has knowledge of its derived class NamedStepClause. I tried a couple of things to make this sit better with me. I tried to move things out to interfaces but then the problem just moved from the concrete to the interfaces - INamedStepClause still need to derive from IStepClause and IStepClause needs to return INamedStepClause to be able to call Step(). I could also make Step() part of a completely separate type. Then we do not have this problem and we'd have: var workflow = new Workflow().Configure() .Step().Action1() .Step("abc").Action2() .Step().Action2() .Step("def").Action1(); Which is ok but I'd like to make the step-naming optional if possible. I found this other post on SO here which looks interesting and promising. What are your opinions? I'd think the original solution is completely unacceptable or is it? By the way, those action methods will take predicates and functors and I don't think I want to take an additional parameter for naming the step there. The point of it all is, for me, is to only define these action methods in one place and one place only. So the solutions from the referenced link using generics and extension methods seem to be the best approaches so far.

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• Encrypting using RSA via COM Interop = "The requested operation requires delegation to be enabled on

  - by Mr AH

  Hi Guys, So i've got this little static method in a .Net class which takes a string, uses some stored public key and returns the encrypted version of that key. This is basically so some user entered data can be saved an encrypted, then retrieved and decrypted at a later date. Pretty basic stuff and the unit test works fine. However, part of the application is in classic ASP. This then uses some COM visible version of the class to go off and invoke the method on the real class and return the same string to the COM client (classic ASP). I use this kind of stuff all the time, but in this case we have a major problem. As the method is doing something with RSA keys and has to access certain machine information to do so, we get the error: "The requested operation requires delegation to be enabled on the machine. I've searched around a lot, but can't really understand what this means. I assume I am getting this error on the COM but not the UT because the UT runs as me (Administrator) and classic ASP as IWAM. Anyone know what I need to do to enable IWAM to do this? Or indeed if this is the real problem here?

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• Validate MVC 2 form using Data annotations and Linq-to-SQL, before the model binder kicks in (with D

  - by Stefanvds

  I'm using linq to SQL and MVC2 with data annotations and I'm having some problems on validation of some types. For example: [DisplayName("Geplande sessies")] [PositiefGeheelGetal(ErrorMessage = "Ongeldige ingave. Positief geheel getal verwacht")] public string Proj_GeplandeSessies { get; set; } This is an integer, and I'm validating to get a positive number from the form. public class PositiefGeheelGetalAttribute : RegularExpressionAttribute { public PositiefGeheelGetalAttribute() : base(@"\d{1,7}") { } } Now the problem is that when I write text in the input, I don't get to see THIS error, but I get the errormessage from the modelbinder saying "The value 'Tomorrow' is not valid for Geplande sessies." The code in the controller: [HttpPost] public ActionResult Create(Projecten p) { if (ModelState.IsValid) { _db.Projectens.InsertOnSubmit(p); _db.SubmitChanges(); return RedirectToAction("Index"); } else { SelectList s = new SelectList(_db.Verbonds, "Verb_ID", "Verb_Naam"); ViewData["Verbonden"] = s; } return View(); } What I want is being able to run the Data Annotations before the Model binder, but that sounds pretty much impossible. What I really want is that my self-written error messages show up on the screen. I have the same problem with a DateTime, which i want the users to write in the specific form 'dd/MM/yyyy' and i have a regex for that. but again, by the time the data-annotations do their job, all i get is a DateTime Object, and not the original string. So if the input is not a date, the regex does not even run, cos the data annotations just get a null, cos the model binder couldn't make it to a DateTime. Does anyone have an idea how to make this work?

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• Visual Studio 2010 Can no longer build .NET v3.5

  - by Adam Driscoll

  I have a 2010 project that is targeting .NET v3.5. Inexplicably I can no longer build v3.5 projects. The project doesn't have ANY references added. It won't even let me add a reference to System.Core as it is added by the 'build system'. warning CS1685: The predefined type 'System.Func' is defined in multiple assemblies in the global alias; using definition from 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll' IFilter.cs(82,49): error CS0433: The type 'System.Func' exists in both 'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\System.Core.dll' and 'c:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll' Looks like something is grabbing onto 4.0 but I'm not quite sure how to fix it. Any one else run into this? Coworker had this same issue. It took a reinstall of Windows to correct the problem I've opened a bug on this one: https://connect.microsoft.com/VisualStudio/feedback/details/558245/warning-cs1685-when-compiling-a-v3-5-net-application-in-visual-studio-2010 If the compiler is set to verbose I see this: FrameworkPathOverride = C:\Windows\Microsoft.NET\Framework\v4.0.30319 which is defined as: Specifies the location of mscorlib.dll and microsoft.visualbasic.dll. This parameter is equivalent to the /sdkpath switch of the vbc.exe compiler. Some other interesting tidbits: I've created a new project all together and cannot build v3.5 at all. I can build 2.0, 3.0, 3.5 Client Profile, 4.0 and 4.0 Client Profile with no problem. VB.NET can build v3.5 but C# cannot. I've tried a reinstall of .NET 3.5, 4.0 and Visual Studio 2010 with no success. Visual Studio debug logs shown nothing interesting and Safe Mode does not work. Trying to avoid a Windows reinstall...

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• Flex 3 : UIComponent.addChild issue

  - by Frank

  Hello SOers, I've run into a nice problem with the UIComponent.addChild(...) function. First of all, I'm using ESRI Api for Flex. In this API you find a class called Graphic that inherits UIComponent. Basically, I'm trying to add, as a child, a Graphic 'g' to another graphic 'parent'. So that when you delete the 'parent' graphic the 'g' graphic deletes as well. private function writeMeasurements(parent:Graphic):void { var g:Graphic; if(parent.geometry.extent != null) g = new Graphic(parent.geometry.extent.center); else g = new Graphic(parent.geometry); g.initialize(); g.name = UIDUtil.createUID(); g.symbol = txtSym; graphicsLayer.add(g); parent.addChild(g); } graphicsLayer class This code actually runs pretty fine. The problem is after... it's like if the addChild function was asynchronious. This is the error I get : TypeError: Error #1009: Il est impossible d'accéder à la propriété ou à la méthode d'une référence d'objet nul. at com.esri.ags::Graphic/updateDisplayList()[C:\checkout\flex_api\api\src\com\esri\ags\Graphic.as:346] at mx.core::UIComponent/validateDisplayList() at mx.managers::LayoutManager/validateDisplayList() at mx.managers::LayoutManager/doPhasedInstantiation() at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/callLaterDispatcher2() at mx.core::UIComponent/callLaterDispatcher() I know this is a very specific question, but I think you guys are the BEST! Thanks.

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• g++ C++0x enum class Compiler Warnings

  - by Travis G

  I've been refactoring my horrible mess of C++ type-safe psuedo-enums to the new C++0x type-safe enums because they're way more readable. Anyway, I use them in exported classes, so I explicitly mark them to be exported: enum class __attribute__((visibility("default"))) MyEnum : unsigned int { One = 1, Two = 2 }; Compiling this with g++ yields the following warning: type attributes ignored after type is already defined This seems very strange, since, as far as I know, that warning is meant to prevent actual mistakes like: class __attribute__((visibility("default"))) MyClass { }; class __attribute__((visibility("hidden"))) MyClass; Of course, I'm clearly not doing that, since I have only marked the visibility attributes at the definition of the enum class and I'm not re-defining or declaring it anywhere else (I can duplicate this error with a single file). Ultimately, I can't make this bit of code actually cause a problem, save for the fact that, if I change a value and re-compile the consumer without re-compiling the shared library, the consumer passes the new values and the shared library has no idea what to do with them (although I wouldn't expect that to work in the first place). Am I being way too pedantic? Can this be safely ignored? I suspect so, but at the same time, having this error prevents me from compiling with Werror, which makes me uncomfortable. I would really like to see this problem go away.

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• Cruise Control and Mercurial. Setup problems

  - by Bernard Larouche

  I am completely a newbie in continuous integration but I am trying to learn it. Here is my set up. I have a main production location. Computer A. I have a virtual machine hosting Windows Server 2008 OS which have Cruise Control.NET installed and running. Computer B I use Mercurial as my source control tool installed in Computer A. Everything is configured and I can see Cruise Control report on my Computer B Web server and I can me my repository on Computer A Web server. The problem is the following : From my Computer B's Cruise Control console I have the following error : Source control failure : Unable to execute file [c:\develop\CCnet\WorkingDir\hg]. The file may not exist or may not be executable. File not found 'C:\develop\CCnet\CCnetrtifacts\msbuils-results.xml. What I did is that I copied my project directory on the Cruise Control computer c:\develop\CCnet\WorkingDir\ and Here is my source control block included in my ccnet.config : <sourcecontrol type="hg"> <repo>http://mylocalmachinewebserver<repo> <workingDirectory>c:\develop\CCnet\WorkingDirectory<workingDirectory> </sourcecontrol> Could someone help me understand my problem Many thanks

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• ASPXAUTH cookie is not being saved.

  - by kripto_ash

  Hi, Im working on a web project in ASP .NET MVC 2. In this project we store some info inside an ecripted cookie (the ASPXAUTH cookie) to avoid the need to query the db for every request. The thing is the code for this part has suddenly stopped working. I reviewed the changes made to the code on the source control server for anything that could be causing it, I found nothing. I even reverted to a known working copy (working on some other persons PC, same code, etc) but after debugging, it seems the .ASPXAUTH cookie is not getting saved anymore. Instead the ASP.NET_SessionId cookie is being set... (wich before wasn't) I changed the web.config file to turn off the sessionState. This eliminated the ASP.NET_SessionId cookie from being set, but it is still not saving the auth cookie. Ive recently installed some Microsoft Windows XP Updates, but the other person (whos PC runs the application just fine) also did. After googling, some info i found pointed out to a problem with the expiration date of the cookie. Ether cus the pc didnt have the right time/date (this was not the case) and others cus of the cookie expiration date being wrongly set. (I checked and it is being set correctly)... The problem persists with other browsers besides the one im using (Chrome) i tried it with IE6. Any ideas on why this is happening? Ill continue to post any helpful information i can find. Thanks in advance.

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• Extracting a specific value from command-line output using powershell

  - by Andrew Shepherd

  I've just started learning PowerShell this morning, and I'm grappling with the basics. Here's the problem: I want to query subversion for the revision number of a repository, and then create a new directory with this revision number. The command svn_info outputs a number of label\value pairs, delimited by colons. For example Path: c# URL: file:///%5Copdy-doo/Archive%20(H)/Development/CodeRepositories/datmedia/Development/c%23 Repository UUID: b1d03fca-1949-a747-a1a0-046c2429f46a Revision: 58 Last Changed Rev: 58 Last Changed Date: 2011-01-12 11:36:12 +1000 (Wed, 12 Jan 2011) Here is my current code which solves the problem. Is there a way to do this with less code? I'm thinking that with the use of piping you could do this with one or two lines. I certainly shouldn't have to use a temporary file. $RepositoryRoot = "file:///%5Cdat-ftp/Archive%20(H)/Development/CodeRepositories/datmedia" $BuildBase="/Development/c%23" $RepositoryPath=$RepositoryRoot + $BuildBase # Outputing the info into a file svn info $RepositoryPath | Out-File -FilePath svn_info.txt $regex = [regex] '^Revision: (\d{1,4})' foreach($info_line in get-content "svn_info.txt") { $match = $regex.Match($info_line); if($match.Success) { $revisionNumber = $match.Groups[1]; break; } } "Revision number = " + $revisionNumber;

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• codeigniter & cjax framework, fatal error class 'CI_Controller' not found

  - by Martin

  I'm having this weird error with Codeigniter 2.1.3 and latest cjax for codeigniter. Weird thing is, when I download the latest codeigniter, and latest cjax framework for codeitniger and copy to my friends server, and call: domain.com/ajax.php?test/test2 to show the test ajax examples ... it works like a breeze, but when I do this on my server, I get server error (even tho, we both have same php version and such). Server then throws in error log file this error: PHP Fatal error: Class 'CI_Controller' not found in /hosting/www/domain.com/www/application/response/test.php on line 3 Now, I've read thru stackoverflow with people having this problem and solving by changing the construct and calling CI_Controller instead of Controller. But I already do that ... - I mean it's in the basic example that is suppose to work without touching the code, and it does, just not on my domain for some crappy reason. Ajax.php from cjax framework for codeingter should load controller from folder response, named test and call function test2, which looks like this (the actual file named test.php): class Test extends CI_Controller { function __construct() { parent::__construct(); } /** * * ajax.php?test/test/a/b/c * * @param unknown_type $a * @param unknown_type $b * @param unknown_type $c */ function test($a = null,$b = null, $c = null) { $this->load->view('test', array('data' => $a .' '.$b.' '.$c)); } /** * ajax.php?test/test2 * * Here we are testing out the javascript library. * * Note: the library it is not meant to be included in ajax controllers - but in front-controllers, * it is being used here for the sake of simplicity in testing. */ function test2() { $ajax = ajax(); $ajax->update('response','Cjax Works'); $ajax->append('#response','<br /><br />version: '.$ajax->version); $ajax->success('Cjax was successfully installed.', 5); //see application/views/test2.php $this->load->view('test2'); } I was hoping someone could bring some light into this problem - or maybe someone has already experienced it? Thanks for your time! Mart

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• 'ErrorMessageResourceType' property specified was not found. on XmlSerialise

  - by Redeemed1

  In my ASP.Net MVC app I have a Model layer which uses localised validation annotations on business objects. The code looks like this: [XmlRoot("Item")] public class ItemBo : BusinessObjectBase { [Required(ErrorMessageResourceName = "RequiredField", ErrorMessageResourceType = typeof(StringResource))] [HelpPrompt("ItemNumber")] public long ItemNumber { get; set; } This works well. When I want to serialise the object to xml I get the error: "'ErrorMessageResourceType' property specified was not found" (although it is lost beneath other errors, it is the innerexception I am trying to work on. The problem therefore is the use of the DataAnnotations attributes. The relevant resource files are in another assembly and are marked as 'public' and as I said everything works well until I get to serialisation. I have references to the relevant DataAnnotations class etc in my nunit tests and target class. By the way, the HelpPrompt is another data annotation I have defined elsewhere and is not causing the problem. Furthermore if I change the Required attribute to the standard format as follows, the serialisation works ok. [Required(ErrorMessage="Error")] Can anyone help me?

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• Using ContentProviderOperation to update and insert contacts

  - by Bogus

  Hello, I faced the problem updating/insertng contacts on Android 2.0+. There is no problem to insert a new contact when phone book is empty but when I did it 2nd time some fileds like TEL, EMAIL are doubled and tripped etc. but N, FN, ORG are ok (one copy). After getting and advice of other member this forum I updated a contact first and then ContentProviderResult[] returned uri's with null then I do an insert action and it went ok but after that I made an update and all contacts are aggregated into one - i got 1 contact insted 3 which existed in phone book. This one was damaged, the contact fields are randomly built. I set Google account. Code: ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>(); ops.add(ContentProviderOperation.newUpdate(ContactsContract.RawContacts.CONTENT_URI) .withValue(RawContacts.AGGREGATION_MODE, RawContacts.AGGREGATION_MODE_DISABLED) .withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, accountType) .withValue(ContactsContract.RawContacts.ACCOUNT_NAME, accountName) .build()); // add name ContentProviderOperation.Builder builder = ContentProviderOperation.newUpdate(ContactsContract.Data.CONTENT_URI); builder.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0); builder.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE); builder.withValue(ContactsContract.CommonDataKinds.StructuredName.PHONETIC_FAMILY_NAME, name); // phones ContentProviderOperation.Builder builder = ContentProviderOperation.newUpdate(ContactsContract.Data.CONTENT_URI); builder.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0); builder.withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE); builder.withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, phoneValue); builder.withValue(ContactsContract.CommonDataKinds.Phone.TYPE, phoneType); builder.withValue(ContactsContract.CommonDataKinds.Phone.LABEL, phoneLabel); ops.add(builder.build()); // emails ... // orgs ... try { ContentProviderResult[] result = mContentResolver.applyBatch(ContactsContract.AUTHORITY, ops); } } catch (Exception e) { Log.e(LOG_TAG, "Exception while contact updating: " + e.getMessage()); } What is wrong in this solution ? How does work aggregation engine ? I will be glad for help. Bogus

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• Does the WMI event Win32_VolumeChangeEvent work on Windows XP

  - by Christian Rodemeyer

  I'm trying to use the following c# code to detect the attached/removed event of usb mass storage devices. I'm using the Win32_VolumeChangeEvent. // Initialize an event watcher and subscribe to events that match this query var _watcher = new ManagementEventWatcher("select * from Win32_VolumeChangeEvent"); _watcher.EventArrived += OnDeviceChanged; _watcher.Start(); void OnDeviceChanged(object sender, EventArrivedEventArgs args) { Console.WriteLine(args.NewEvent.GetText(TextFormat.Mof)); } The problem is that this works fine on Vista but it doesn't work on XP at all (no events received). The Microsoft documentation says that this should work (http://msdn.microsoft.com/en-us/library/aa394516(VS.85).aspx). I googled for this quite a while and found other that have this problem too. But I also found a couple of articles which claim that this kind of query (mostly in vbscript) works with XP. But I cannot find some offical information from microsoft for this issue and I can't believe that Microsoft have overlooked this issue for three service packs. So my question is: has anybody used the Win32_VolumeChangeEvent with success on XP or can provide a link/explanation why it shouldn't work on XP?

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• Hyphen vs Dash : Replace Dash with Hyphen

  - by soldieraman

  Alright so we had a problem recently In reporting services some of the String Columns were appearing as gibberish Chinese characters. On further investigation we found it is the hyphen. Well that's what we though first. On further investigation we found it a dash (or en dash) . Basically the reason this has happened is people copy pasting values into this column from word which converts hyphens into dashes automatically. But if you look at the database they both look the same. Though on the application side you can see the difference. How do I replace the dash with a normal hyphen. If you copy the value in put it in SQL server. A hyphen is gray while a dash is black but they both look exactly the same (i.e not bigger or smaller). Problem is I can't write a REPLACE script then (they are the freakin same) REPLACE ('-' with '-') is there a way special characters like the dash can be identified in SQL server? SQL Server v 2005

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• How to solve "catastrophic failure" with 32-bit COM component in SysWOW64\cscript or wscript

  - by kcrumley

  I'm trying to run a VBScript script that uses a 7-year-old 3rd-party 32-bit COM component on Windows Server 2008 R2, with the command-line 32-bit script host, SysWOW64\cscript.exe. When I call CreateObject on the class, it appears to be successful, but the very first time I try to use a property or method (I've tried several different ones) on the object, it gives me the "catastrophic failure". I have identical results with SysWOW64\wscript.exe, except, of course, that my error message comes in a msgbox instead of the command-line window. I think this has to do specifically with the 64-bit scripting hosts because of the following: The equivalent Classic ASP script, calling the same component and using 95% of the same code, works correctly on the same server, with IIS configured to support 32-bit COM. The same VBScript works correctly on a 32-bit Windows XP machine and a 32-bit Windows Server 2003 machine. The component fails in exactly the same way on my 64-bit Windows 7 machine. My Google searches for solutions to this problem have mostly turned up a lot of different problems that were solved by putting the COM component into a toolbar in Visual Studio. Obviously, that solution doesn't apply here. My questions are: Is there a core problem that is always behind a "catastrophic failure" from a Windows scripting host calling a COM component? Is there a place in a configuration snap-in, or in the registry, where I need to make a change similar to the change I had to make to the IIS Application pool to "Enable 32-bit Applications"? Is there a general place in the Server 2008 R2 Event Viewer that I should be looking, to see if there are any more details on the failure, in case it turns out to be specific to this component? Thanks in advance.

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• How to force two process to run on the same CPU?

  - by kovan

  Context: I'm programming a software system that consists of multiple processes. It is programmed in C++ under Linux. and they communicate among them using Linux shared memory. Usually, in software development, is in the final stage when the performance optimization is made. Here I came to a big problem. The software has high performance requirements, but in machines with 4 or 8 CPU cores (usually with more than one CPU), it was only able to use 3 cores, thus wasting 25% of the CPU power in the first ones, and more than 60% in the second ones. After many research, and having discarded mutex and lock contention, I found out that the time was being wasted on shmdt/shmat calls (detach and attach to shared memory segments). After some more research, I found out that these CPUs, which usually are AMD Opteron and Intel Xeon, use a memory system called NUMA, which basically means that each processor has its fast, "local memory", and accessing memory from other CPUs is expensive. After doing some tests, the problem seems to be that the software is designed so that, basically, any process can pass shared memory segments to any other process, and to any thread in them. This seems to kill performance, as process are constantly accessing memory from other processes. Question: Now, the question is, is there any way to force pairs of processes to execute in the same CPU?. I don't mean to force them to execute always in the same processor, as I don't care in which one they are executed, altough that would do the job. Ideally, there would be a way to tell the kernel: If you schedule this process in one processor, you must also schedule this "brother" process (which is the process with which it communicates through shared memory) in that same processor, so that performance is not penalized.

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• Rails App hangs after few requests

  - by Paddy

  I have Bitnami Rails stack installed on my Mac. To better explain my problem i created a simple scaffold based rails app with mysql as the backend. I can get to perform simple POST and GET requests for a while and after a few requests the app just hangs indefinitely. No exception caught or anything worthwhile in the development log to report this strange behavior. This is the last bit from the development log before the app froze: Processing WritedatasController#index (for 127.0.0.1 at 2010-03-30 20:38:51) [GET] [4;36;1mWritedata Load (0.7ms) [0m [0;1mSELECT * FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/index [4;35;1mWritedata Columns (2.9ms) [0m [0mSHOW FIELDS FROM `writedatas` [0m Completed in 99ms (View: 88, DB: 4) | 200 OK [http://localhost/writedatas] [4;36;1mSQL (0.2ms) [0m [0;1mSET NAMES 'utf8' [0m [4;35;1mSQL (0.1ms) [0m [0mSET SQL_AUTO_IS_NULL=0 [0m Processing WritedatasController#new (for 127.0.0.1 at 2010-03-30 20:38:52) [GET] [4;36;1mWritedata Columns (2.0ms) [0m [0;1mSHOW FIELDS FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/new Rendered writedatas/_form (5.9ms) Completed in 34ms (View: 25, DB: 2) | 200 OK [http://localhost/writedatas/new] [4;36;1mSQL (0.4ms) [0m [0;1mSET NAMES 'utf8' [0m [4;35;1mSQL (0.1ms) [0m [0mSET SQL_AUTO_IS_NULL=0 [0m Processing WritedatasController#index (for 127.0.0.1 at 2010-03-30 20:39:17) [GET] [4;36;1mWritedata Load (0.7ms) [0m [0;1mSELECT * FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/index [4;35;1mWritedata Columns (2.6ms) [0m [0mSHOW FIELDS FROM `writedatas` [0m Completed in 101ms (View: 90, DB: 4) | 200 OK [http://localhost/writedatas] It just hung at this point. And after this happens i have to restart the server, for it to hang again after few requests. This is the weirdest problem i have faced and i am truly stumped.

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• How to find cause and of the SocketException with message that an established connection was aborted

  - by cdpnet

  Hi All, I know the similar question may have been asked many times, but I want to represent the behavior I'm seeing and find if somebody can help predict the cause of this. I am writing a windows service which connects to other windows service over TCP. There are 100 user entities of this, and 5 connections per each. These users perform their tasks using their individual connections. The application goes on withough seeing this problem for 1 or 2 days. Or sometimes show the problem right after starting (-rarely). The best run I had was like 4 to 5 days without showing this exception. And after that application died or I had to stop it for various reasons. I want to know what can be causing this? Here is the stacktrace. System.IO.IOException: Unable to write data to the transport connection: An established connection was aborted by the software in your host machine. ---> System.Net.Sockets.SocketException: An established connection was aborted by the software in your host machine at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Security._SslStream.StartWriting(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessWrite(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslStream.Write(Byte[] buffer, Int32 offset, Int32 count)

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• Wix Burn issue: Uninstall fails saying "Found dependent"

  - by vivek chaurasiya

  I have made a burn bundle which encapsulates 2 msi (msi1 , msi2) . In the UI I use checkboxes to ask the user to select which MSI to install. Now if user selects one of the msi to install, installation goes fine. But during Uninstall action, the burn log file says : [][:15]: Detected package: Netfx4Full, state: Present, cached: None [][:15]: Detected package: DummyInstallationPackageId3, state: **Absent**, cached: None [][:15]: Detected package: msi2.msi, state: **Present**, cached: Complete [][:15]: Detect complete, result: 0x0 [][:16]: Plan 3 packages, action: Uninstall [][:16]: Will not uninstall package: msi2.msi, found dependents: 1 [][:16]: Found dependent: {08e74372-83f2-4594-833b-e924b418b360}, name: My Test Application In the install scenario, I chose to install msi2 and NOT msi1. My bundle code looks like: <Bundle Name="My Test Application" Version="1.0.0.0" Manufacturer="Bryan" UpgradeCode="CC2A383C-751A-43B8-90BF-A250F7BC2863"> <Chain> <PackageGroupRef Id='Netfx4Full' /> <MsiPackage Id="DummyInstallationPackageId3" SourceFile="msi1.msi" ForcePerMachine="yes" InstallCondition="var1 = 1" > </MsiPackage> <MsiPackage SourceFile="msi2.msi" Vital="yes" Cache="yes" Visible="no" ForcePerMachine="yes" InstallCondition="var2 = 2" > </MsiPackage> </Chain> My OnDetectPackageComplete() looks like: private void OnDetectPackageComplete(object sender, DetectPackageCompleteEventArgs e) { if (e.PackageId == "DummyInstallationPackageId3" ) { if (e.State == PackageState.Absent) InstallEnabled = true; else if (e.State == PackageState.Present) UninstallEnabled = true; } } What should I do so that the burn bundle is freely able to uninstall the msi which the user selected at the time of install. Besides, If I select both msi to install, then uninstall is working fine. IMO, there is some problem b/w the relation of bundle and the 2 msi. Please help me as I am stuck with this problem.

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• UITableViewCellSeparatorStyleNone does not hide blue separator line when selecting in UITableView

  - by clozach

  Before describing the problem, let me first point out that this is a distinct issue from this question. The Problem This screenshot was taken with a break set at tableView:didSelectRowAtIndexPath:, and as you can see in the simulator (far right of the image), there's a single-pixel blue line at the bottom of the selected cell. This is not the design asked for by the client, nor is it how this app used to behave: there should be no separator, even on selection. How I Got Here I'd initially designed this table view using custom UITableViewCell classes with corresponding nib (.xib) files and had no trouble with selections: the separator was hidden as desired. Predictably, scrolling was sluggish due to all the overhead from the view hierarchy, so I reworked the custom cells to use Loren Brichter's fast scrolling solution. Now scrolling is much faster, but I can't get rid of the separator for the life of me. What I've tried At the time of the screenshot above... the table view has "Separator [None]" in IB. the UIViewController that contains the table view has this line in viewDid Load: self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone; As you can see in the screenshot, I inserted some unused lines to prove that separatorStyle is set as desired. Other testing confirms that tableView and self.tableView are equivalent pointers at that same breakpoint. I've also tried setting tableView.separatorColor to black and to clear, all with the same result: the cells look right until a selection is made.

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• Crawler do not create custom crawled properties

  - by user173739

  These days i have faced with very strange problem. I have development environment with MOSS 2007 SP 2 and WS 2008, i have search configured and everything works great. I have started to configuring staging environment (MOSS 2007 SP2 with June CU) and create new farm and new SSP. I have deployed my changes with package (wsp) and manually create site collections, sub webs, pages and so on. When fill crawl finishes, i see in Crawl log that all my pages have been successfully crawled and when i use some test tools to query search, my pages have been found. In crawl log there is few errors like http://mysite/sites/de/pages "The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly..", but all pages in this Page library were indexed. The problem is that i use custom managed properties (mapped to custom crawled properties) in search queries, but crawler didn't create crawled properties for all my new site columns. For example for site column IsAccent the crawler didn't create cralwed property ows_isAccesnt. I'm sure that i have created pages for specific content type and all my crawl categories have checked "Automatically discover new properties when a crawl takes place ". In site settings - Searchable columns i haven't got any column selected as Nocrowl. I tried to export my managed and crawled properties from dev environment to stage evironment but all my managed properties were empty, after that i recreated SSP...the result was the same... I checked specific page with tools like Sharepoint Manager 2007 and U2U Caml Query Builder 2007 that content type is correct, and i can see values of my custom site collumns.... Using U2U Caml Query Builder 2007 agains some Page library in Result tab i can see ows_IsAccent (my site collumn is IsAccent) and others site columns, but i can't find them in Crawled properties. Any idias?

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• Ruby on Rails: How to sanitize a string for SQL when not using find?

  - by williamjones

  I'm trying to sanitize a string that involves user input without having to resort to manually crafting my own possibly buggy regex if possible, however, if that is the only way I would also appreciate if anyone can point me in the right direction to a regex that is unlikely to be missing anything. There are a number of methods in Rails that can allow you to enter in native SQL commands, how do people escape user input for those? The question I'm asking is a broad one, but in my particular case, I'm working with a column in my Postgres database that Rails does not natively understand as far as I know, the tsvector, which holds plain text search information. Rails is able to write and read from it as if it's a string, however, unlike a string, it doesn't seem to be automatically escaping it when I do things like vector= inside the model. For example, when I do model.name='::', where name is a string, it works fine. When I do model.vector='::' it errors out: ActiveRecord::StatementInvalid: PGError: ERROR: syntax error in tsvector: "::" "vectors" = E'::' WHERE "id" = 1 This seems to be a problem caused by lack of escaping of the semicolons, and I can manually set the vector='\:\:' fine. I also had the bright idea, maybe I can just call something like: ActiveRecord::Base.connection.execute "UPDATE medias SET vectors = ? WHERE id = 1", "::" However, this syntax doesn't work, because the raw SQL commands don't have access to find's method of escaping and inputting strings by using the ? mark. This strikes me as the same problem as calling connection.execute with any type of user input, as it all boils down to sanitizing the strings, but I can't seem to find any way to manually call Rails' SQL string sanitization methods. Can anyone provide any advice?

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