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• .NET ThreadPool QueueUserWorkItem Synchronization

  - by ikurtz

  I am employing ThreadPool.QueueUserWorkItem to play some sound files and not hanging up the GUI while doing so. It is working but has an undesirable side effect. While the QueueUserWorkItem CallBack Proc is being executed there is nothing to stop it from starting a new thread. This causes the samples in the threads to overlap. How can I make it so that it waits for the already running thread to finish running and only then run the next request? EDIT: I did: Thread t = new Thread(FireAttackProc(fireResult)); t.Start(); but it gave me some errors. How do I specify a thread method with parameters?

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• Core Data performance deleteObject and save managed object context

  - by Gary

  I am trying to figure out the best way to bulk delete objects inside of my Core Data database. I have some objects with a parent/child relationship. At times I need to "refresh" the parent object by clearing out all of the existing children objects and adding new ones to Core Data. The 'delete all' portion of this operation is where I am running into trouble. I accomplish this by looping through the children and calling deleteObject for each one. I have noticed that after the NSManagedObjectContext:Save call following all of the deleteObject calls is very slow when I am deleting 15,000 objects. How can I speed up this call? Are there things happening during the save operation that I can be aware of and avoid by setting parameters different or setting up my model another way? I've noticed that memory spikes during this operation as well. I really just want to "delete * from". Thanks.

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• JavaScript: catching URI change

  - by ptrn

  I have a site where I'm using hash based parameters, eg. http://url.of.site/#param1=123 What I want When the user manually changes the URI to eg. http://url.of.site/#param1=789 When the user enters this URI, the event is caught by the JavaScript, and the appropriate functions are called. Basically, what I'm wondering about is; is there an event listener for this? Or would I have to periodically check the URI to see if it has been changed? I'm already using the current jQuery API, if that helps. _L

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• Where to call RouteDebugger.RewriteRoutesForTesting() when route registration is injected?

  - by boris callens

  As Phil Haack explains on his blog entry, the Route Debugger helps visualizing your routing tables. My site however gets it's routing injected by the MVCTurbine dependency injection (using Unity) like so: public class DefaultRoutRegistration : IRouteRegistrator { public void Register(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( "Accounts", "Accounts/{userName}/{action}", new { controller = "Account", action = "Index" } ); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = "" } // Parameter defaults ); RouteDebug.RouteDebugger.RewriteRoutesForTesting(RouteTable.Routes); } } Where exactly can I throw in the the RouteDebug.RouteDebugger.RewriteRoutesForTesting(RouteTable.Routes); to rewrite my routing table?

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• PHP Server did not recognize the value of HTTP Header SOAPAction

  - by Joe

  I am making my first SOAPclient and I am stuck with the Headers, I am getting a response and when I look at my request it has a soap:body but no soap:headers. The web service has needs 3 parameters 1.UserName 2.Password 3.errorMessage This is the code I have set up. $SOAPAction = 'http://localhost/DriveAwayPriceCalculation/PriceCalculation'; //Namespace of the WS. // $SoapHeaders = array('User123' => $UserName, 'Password123' => $Password, '' => $errorMessage); $client = new nusoap_client("https://test.com/CalculationWS.asmx?WSDL", false, $UserName, $Password, $errorMessage); $headers = new SoapHeader('http://localhost/DriveAwayPriceCalculation/PriceCalculation', true, $SoapHeaders); As I said I am just starting out in SOAP (and PHP) so if you could help, it would be great. Thanks

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• Unable to generate temporary class for web service

  - by sac

  I have an application with a proxy class for my webservice - This works fine in all 32-bit machines. However the same app throws an exception in windows server 2008 64-bit machine. It looks like the temporary class could not be generated for the web service. The error in the event viewer is "error CS0008: Unexpected error reading metadata from file '' -- 'Bad Key. ' Here's the call stack... at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence) at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies) at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence) at System.Xml.Serialization.XmlSerializer.GetSerializersFromCache(XmlMapping[] mappings, Type type) at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Type type) at System.Web.Services.Protocols.SoapClientType..ctor(Type type) at System.Web.Services.Protocols.SoapHttpClientProtocol..ctor() at Fusion.ServiceCatalogProxy..ctor() I am not able to get any info about this bad key error....

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• SQLite3-ruby extremely slow under 1.9.1?

  - by NilObject

  I decided to upgrade my server to Ruby 1.9.1, and a lot of things are indeed much faster. However, I have a process that dumps a database to sqlite, and it's become glacially slow. What used to take 30 seconds now takes upwards of 10 minutes. The code does several create table statements, and then lots of inserts. The insert statements nearly all use placeholders (?), so SQLite is doing the heavy lifting of binding the parameters. In short, I can't see why this particular usage has slowed down so much. Does anyone know of any problems that have caused it? I'm using sqlite3-ruby (1.2.5), and I'm hoping that someone has encountered this and profiled it. If not, I guess I'm going to learn how to profile ruby code :)

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• C#: Pass a user-defined type to a Oracle stored procedure

  - by pistacchio

  With reference to http://stackoverflow.com/questions/980324/oracle-variable-number-of-parameters-to-a-stored-procedure I have s stored procedure to insert multiple Users into a User table. The table is defined like: CREATE TABLE "USER" ( "Name" VARCHAR2(50), "Surname" VARCHAR2(50), "Dt_Birth" DATE, ) The stored procedure to insert multiple Users is: type userType is record ( name varchar2(100), ... ); type userList is table of userType index by binary_integer; procedure array_insert (p_userList in userList) is begin forall i in p_userList.first..p_userList.last insert into users (username) values (p_userList(i) ); end array_insert; How can I call the stored procedure from C# passing a userList of userType? Thanks

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• CGBitmapContextCreate: unsupported parameter combination

  - by tarmes

  I'm getting this error when creating a bitmap context: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 24 bits/pixel; 3-component color space; kCGImageAlphaNone; 7936 bytes/row. Here's the code (note that the context is based on the parameters of an existing CGImage: context = CGBitmapContextCreate(NULL, (int)pi.bufferSizeRequired.width, (int)pi.bufferSizeRequired.height, CGImageGetBitsPerComponent(imageRef), 0, CGImageGetColorSpace(imageRef), CGImageGetBitmapInfo(imageRef)); Width is 2626, height is 3981. I've leaving bytesPerRow at zero so that it gets calculated automatically for me, and it's chosen 7936 of its own accord. So, where on Earth is the inconsistency? It's driving me nuts.

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• How to page while maintaining the querystring values in ASP.Net Mvc 2

  - by Picflight

  I am using the pager provided by Martijin Boland to implementing paging in my Asp.Net Mvc 2 application. My form uses the GET method to send all parameters to the querystring, it is a search form with several form elements. <% using (Html.BeginForm("SearchResults", "Search", FormMethod.Get)) {%> On the SearchResults View I am trying to implement paging: <div class="pager"> <%= Html.Pager(Model.PageSize, Model.PageNumber, Model.TotalItemCount, new { Request.QueryString })%> </div> The Html.Pager has some overloads which I am not too clear on how to use. The Request.QueryString makes the querystring look like this: http://localhost:1155/Search/SearchResults?QueryString=Distance%3D10%26txtZip%3D%26cb&page=2 Should it not be like this? http://localhost:1155/Search/SearchResults?Distance=20&txtZip=10021&page=2

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• Configuring asp.net web applications. Best practices

  - by Andrew Florko

  Hello everybody, There is a lot of configurable information for a web-site: UI messages Number of records used in pagination & other UI parameters Cache duration for web-pages & timeouts Route maps & site structure ... There are many approaches to store all this information also: AppSettings (web.config) Custom sections (web.config) External xml/text files referred from web.config Internal static class(es) of constants Database table(s) ... What approaches do you usually choose for your tasks & what approaches do you find unsuitable? Thank you in advance!

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• Should I use vnd.youtube:videoID?

  - by Felix

  While playing around with the emulator, I noticed that when trying to view a YouTube video the browser gives an error saying it can not load the page at vnd.youtube:ngc978y6rCU?some=parameters. I don't have an Android device, but by this I can suppose that launching a VIEW intent with the data URI set to vnd.youtube:VIDEO_ID would launch the default YouTube application and watch that video. Now, my application has to be able to display YouTube videos. Right now I have a custom-made YouTube activity which does just that, but I'm thinking of: Removing my custom activity and just launching a VIEW intent with a vnd.youtube:VIDEO_ID Uri, or Testing whether that Intent is available and using it, or, if it's not available, using my custom activity. Is this a good idea? Does this work at all (as I said I have no Android device, I'll just be borrowing one from a friend to test my final application)? Which way should I go?

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• ASP.NET url MAX_PATH limit

  - by Greg Ballard

  Hi, I've found an issue with ASP.NET that I know at least has stumped one other person out there. We were trying to use an HttpModule to handle wildcard requests to a web application. The generated url is dynamic and could potentially be several hundred characters long. Unfortunately there appears to be a limitation in the aspnet_isapi.dll file that limits the length of the path in the url to MAX_PATH which is hardcoded at 260 chars. Has anyone else ran into this and found a way around this limit? Query string parameters are not an option. Thanks, Greg Ballard

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• remove dead routes in asp.net mvc 2

  - by loviji

  hello, i have get a problem. The request for 'Account' has found the following matching controllers: uqs.Controllers.Admin.AccountController MvcApplication1.Controllers.AccountController I search in project by Visual Studio MvcApplication1.Controllers.AccountController to remove it. but can't find match. So, I try to register a route: routes.MapRoute( "LogAccount", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "AccountController", action = "LogOn", id = "" }, new string[] { "uqs.Controllers.Admin" } // Parameter defaults ); But can't solve problem. Multiple types were found that match the controller named 'Account'. How I can Remove MvcApplication1.Controllers.AccountController. or fix this problem? Thanks.

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• Basic HTTP Authentication using Obj C and Xcode.

  - by Kristiaan

  Hi Everyone, I am hoping someone can help me with a question i have relating to Basic HTTP Authentication in an Xcode 2.3 application. Basically i have a PHP page that is on our server and when called with certain parameters returns data relating to the servers condition etc. i have managed to get a small Xcode application working where by it reads the data from the page and populates an NSTextView with the data. however to make sure this information stays safe i have setup basic HTTP Authentication on the page, but i cannot work out how to provide the username and password in XCode. here is my code to retrieve the page. NSURL *url = [NSURL URLWithString:@"http://www.google.com"]; NSString *content = [NSString stringWIthContentsOfUrl:url]; [myTextView setString:content]; i am still at a very basic beginner level regarding xcode and obj c, so nice simple examples of how i go about this would really be appreciated. Thanks Kris

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• JNA-Mapping Delphi Function

  - by Florian

  Hi! How do i map this function with JNA: Delphi code: function getData(InData1: PChar; InData2: PChar; Data: TArray16; var OutData1: PChar; var OutData2: PChar): integer; stdcall; with: TArray16 = array[0..15] of char; The int value that is returned can be 0 for Error or 1 for right execution; My suggestion is: Java code: int getData(String inData1, String inData2, byte[] data, byte[] outData1 byte[] outData2); The problem is that the function of the dll returns 0. I also tried other Datatypes, but it hasn't worked jet. I think the problem is that the dll function can't write to the parameters outData1 and outData2. Who can help me?....Thanks!!

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• How to properly match varargs in Mockito

  - by qualidafial

  I've been trying to get to mock a method with vararg parameters using Mockito: interface A { B b(int x, int y, C... c); } A a = mock(A.class); B b = mock(B.class); when(a.b(anyInt(), anyInt(), any(C[].class))).thenReturn(b); assertEquals(b, a.b(1, 2)); This doesn't work, however if I do this instead: when(a.b(anyInt(), anyInt())).thenReturn(b); assertEquals(b, a.b(1, 2)); This works, despite that I have completely omitted the varargs argument when stubbing the method. Any clues?

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• How do I identify the referrer page in ASP.NET?

  - by dotnet-practitioner

  In VS2003, I am trying to find out the particular page where the request is coming from. I want to identify the exact aspx page name. Is there a way to only get the page name or some how strip the page name? Currently I am using the following instruction... string referencepage = HttpContext.Current.Request.UrlReferrer.ToString(); and I get the following result... "http://localhost/MyPage123.aspx?myval1=3333&myval2=4444; I want to get the result back with out any query string parameters and be able to identify the page MyPage123.aspx accurately... How do I do that??

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• Resizing screenshots/screen captures for inclusion in Beamer

  - by Stephen

  Sorry, this may or may not be a programming question directly, but I am trying to resize screenshots with Imagemagick and Gimp to include in a Beamer presentation, but it comes out even blurrier than the resizing done by LaTeX. For instance, in Beamer I might have a command to rescale the image \includegraphics[width=.5\textwidth]{fig.png}. Using something like \begin{frame} \message{width = \the\textwidth} \message{height = \the\textheight} \end{frame} I have gotten the \textwidth and \textheight parameters in points (345.69548, 261.92444). So I have a script (in Python) that sends a system call to Imagemagick: 'convert %s -resize %.6f@ resized_%s' % (f,a,f) where a is calculated as \textwidth*\textheight*0.5**2. When I then go back into my Beamer presentation and include the resized figure, \includegraphics{resized_fig.png}, the size looks approximately correct but it's super-blurry. I also tried resizing in Gimp (using the GUI) but no luck either... help? Thanks...

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• Workflow Foundation: How to create Receive activity with custom message in xaml designer?

  - by Petr Felzmann

  I need to have Receive activity which can receive my custom data. I found examples, but all use coded workflows like such public class ProcessRequest : Activity { public ProcessRequest() { Variable request = new Variable { Name = "request" }; Receive receiveRequest = new Receive { ServiceContractName = "IProcessRequest", OperationName = "Foo", CanCreateInstance = true, Content = ReceiveContent.Create(new OutArgument(request)) }; } } The main point is that Receive.Content property. It is not clear for me how I can do it in XAML designer. What I have to set in the dialog of the Content property - Message or Parameters and what to set inside those options? Thanks for the light!

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• Excel Interop: Range.FormatConditions.Add throws MissingMethodException

  - by Zach Johnson

  I am writing an application which uses the Microsoft.Office.Interop.Excel assembly to export/import data from Excel spreadsheets. Everything was going fine (except for 1 based indexing and all those optional parameters!), until I tried to use conditional formatting. When I call Range.FormatConditions.Add I get a MissingMethodException telling me that no such method exists. This happens in both Vista and XP. Here's an example of the code that generates the exception: //1. Add a reference to Microsoft.Office.Interop.Excel (version 11.0.0.0) //2. Compile and run the following code: using Microsoft.Office.Interop.Excel; class Program { static void Main(string[] args) { Application app = new Application(); Workbook workbook = app.Workbooks[1]; Worksheet worksheet = (Worksheet)workbook.Worksheets[1]; Range range = worksheet.get_Range("A1", "A5"); FormatCondition condition = range.FormatConditions.Add( XlFormatConditionType.xlCellValue, XlFormatConditionOperator.xlBetween, 100, 200); } }

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• How to Create Site using Sharepoint web services?

  - by Pari

  Hi All, I am tring to create site on sharepoint programatically using Sharepoint Web Services.(C#). I tried Admin.asmx service (CreateSite method). But it's showing error: "An unhandled exception of type 'System.InvalidOperationException' occurred in System.Web.Services.dll". I tried with all possible parameters. Curremtly referring Below Links: http://www.oliebol.org/blog/Lists/Posts/Post.aspx?ID=6 http://msdn.microsoft.com/en-us/library/administration.admin.createsite.aspx My Code: Admin admService = new Admin(); admService.Credentials = new NetworkCredential(username,password,domain); admService.Url = "http://mychserver/_vti_adm/admin.asmx"; admService.PreAuthenticate = true; try { String SitePath = "http://myserver/SiteDirectory/SharepointSampleSite"; admService.CreateSite(SitePath,"First Site", "Sample Site", 1033, "STS#0", "Domain\\username",username,userid, "", ""); } catch (System.Web.Services.Protocols.SoapException ex) { MessageBox.Show("Message:\n" + ex.Message + "\nDetail:\n" +ex.Detail.InnerText + "\nStackTrace:\n" + ex.StackTrace); } Thanx,

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• Windows Workflow and sql script in declarative config like InRule

  - by Satish

  We have been using InRule for our Rule needs we have found that it does not scale well and so are investigating the Windows Work Flow. Within InRule we could configure pretty much have any task for example our sql scripts and stored procedures where all part of a separate rule config file, I am wondering if there is a similar functionality within windows work flow where I could just call a declarative task and pass it a bunch of parameters – This task should contain the sql script I would be executing , we should be able to change the script at runtime without recompilation to the WF code. Is this possible in Windows Work flow – How can I accomplish this within work flow. Additionally for sql execution within Work Flow, how does it get the connection string. Should it be passed from the calling program – is passing it as input parameter from the Calling app via the Dictionary object the best way or can the work flow code have visibility to my calling program app.config and get the connection string ?

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• F# currying efficiency?

  - by Eamon Nerbonne

  I have a function that looks as follows: let isInSet setElems normalize p = normalize p |> (Set.ofList setElems).Contains This function can be used to quickly check whether an element is semantically part of some set; for example, to check if a file path belongs to an html file: let getLowerExtension p = (Path.GetExtension p).ToLowerInvariant() let isHtmlPath = isInSet [".htm"; ".html"; ".xhtml"] getLowerExtension However, when I use a function such as the above, performance is poor since evaluation of the function body as written in "isInSet" seems to be delayed until all parameters are known - in particular, invariant bits such as (Set.ofList setElems).Contains are reevaluated each execution of isHtmlPath. How can best I maintain F#'s succint, readable nature while still getting the more efficient behavior in which the set construction is preevaluated. The above is just an example; I'm looking for a general pattern that avoids bogging me down in implementation details - where possible I'd like to avoid being distracted by details such as the implementation's execution order since that's usually not important to me and kind of undermines a major selling point of functional programming.

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• Covariance and Contravariance on the same type argument

  - by William Edmondson

  The C# spec states that an argument type cannot be both covariant and contravariant at the same time. This is apparent when creating a covariant or contravariant interface you decorate your type parameters with "out" or "in" respectively. There is not option that allows both at the same time ("outin"). Is this limitation simply a language specific constraint or are there deeper, more fundamental reasons based in category theory that would make you not want your type to be both covariant and contravariant? Edit: My understanding was that arrays were actually both covariant and contravariant. public class Pet{} public class Cat : Pet{} public class Siamese : Cat{} Cat[] cats = new Cat[10]; Pet[] pets = new Pet[10]; Siamese[] siameseCats = new Siamese[10]; //Cat array is covariant pets = cats; //Cat array is also contravariant since it accepts conversions from wider types cats = siameseCats;

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