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• Why don't Direct2D and DirectWrite use traditional COM objects?

  - by David Brown

  I'm toying with a little 2D game engine in C# and decided to use Direct2D and DirectWrite for rendering. I know there's the Windows API Code Pack and SlimDX, but I'd really like to dig in and write an interface from scratch. I'm trying to do it without Managed C++, but Direct2D and DirectWrite don't appear to use traditional COM objects. They define interfaces that derive from IUnknown, but there appears to be no way to actually use them from C# with COM interop. There are IIDs in d2d1.h, but no CLSID. Of course, I'm really new to COM interop, so perhaps I'm just missing something. Can someone shed some light on this situation?

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• ReadOnlyCollection or IEnumerable for exposing member collections?

  - by Erik Öjebo

  Is there any reason to expose an internal collection as a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection? class Bar { private ICollection<Foo> foos; // Which one is to be preferred? public IEnumerable<Foo> Foos { ... } public ReadOnlyCollection<Foo> Foos { ... } } // Calling code: foreach (var f in bar.Foos) DoSomething(f); As I see it IEnumerable is a subset of the interface of ReadOnlyCollection and it does not allow the user to modify the collection. So if the IEnumberable interface is enough then that is the one to use. Is that a proper way of reasoning about it or am I missing something? Thanks /Erik

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• All about WSDL vs MEX?

  - by Aakash

  I am not able to open the meta data url - http://localhost:8082/Tasks/mex I have added the mexhttpBinding in the config file. Can I see this mex endpoint in browser? The config files look like: <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> Questions: Is Mex is differ from WSDL? If no, why do we require MEX endpoing over WSDL? In the WSDL, I see the WSDL types information missing. Is it by default? Can I look at the type information in WSDL? Thanks in advance.

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• Does IsolatedStorageFileStream.Lock work under SIlverlight4?

  - by Noah

  Silverlight uses an IsolatedStorageFileStream to open files. The IsolatedStorageFileStreamunder NET.4 claims to support the Lock Method (Inherited from FileStream) The following code IsolatedStorageFile isf; IsolatedStorageFileStream lockStream = new IsolatedStorageFileStream( "my.lck", FileMode.OpenOrCreate, isf ); lockStream.Lock( 0, 0 ); generates the following error, wrapped for readability, under VS2010 and Silverlight 4 'System.IO.IsolatedStorage.IsolatedStorageFileStream' does not contain a definition for 'Lock' and no extension method 'Lock' accepting a first argument of type 'System.IO.IsolatedStorage.IsolatedStorageFileStream' could be found (are you missing a using directive or an assembly reference?)

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• Macros's that define macros

  - by David Thornley

  Does anyone know how to pull off something like this... I have alot of repetitive macros as : - #define MYMACRO1(x) Do1(x) #define MYMACRO2(x,y) Do2(x, y) #define MYNEXTMACRO1(x) Do1(x) #define MYNEXTMACRO2(x,y) Do2(x, y) The code above works fine, but I want to write a macro that creates macros (a meta macro). For example: - #define MYMETAMACRO(name) \ #define #name1(x) Do1(x) \ #define #name2(x,y) Do2(x, y) \ Such that I can do : - MYMETAMACRO(MYMACRO); MYMETAMACRO(MYNEXTMACRO); and then : - MYMACRO1(2); MYMACRO2(2,3); MYNEXTMACRO1(4); MYNEXTMACRO2(4, 5); The preprocessor bombs out at the #define as it thinks it is a missing parameter of the macro.

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• Just quick: How do you call a mutator from within a constructor in the same class?

  - by Blockhead

  For a homework assignment the instructions state (within Undergrad class): You do NOT need to include a default constructor, but you must write a full parameterized constructor (it takes 4 arguments) -- this constructor calls the parent class parameterized constructor and the mutator for year level. Because Undergrad extends Student, then Student is my parent class, right? I just can't quite figure out how I'm to use my year level mutator (which is just the simplest of methods) to assign my "year" attribute. public void setYear(int inYear) { year = inYear; } public Student(String inName, String inID, int inCredits) { name = inName; id = inID; credits = inCredits; } public Undergrad(String inName, String inID, int inCredits,int inYear) { super(inName, inID, inCredits); year = inYear; } I keep missing assignments because I spend too much time on these small specific points of the homework so just asking for a little help. I swear it's the wording that throws me off on these assignments almost as often as just learning the material itself.

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• Binding redirect problem in .net

  - by Suresh

  I have a class library called "MyAssembly" that is internally referencing a.dll, b.dll of version 3.1.1.0; I have build the project which outputed MyAssembly.dll. On a different system (box) I have created a web application project and referenced the MyAssembly.dll. the new system has new versions of a.dll and b.dll 4.0.0; I used binding redirect in web.config like below. But still unable to compile the web application. it says missing assembly reference a.dll, version 3.1.1.0. Could any body help in solving this issue? Thanks, Suresh

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• TFS Build Problem

  - by kumar

  c:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets(0,0): warning MSB3245: Could not resolve this reference. Could not locate the assembly "System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors. I am getting this Error Mesage when I build my MVC application.. Do I need to give any additionalrefercepath in TFS.proj file? <ItemGroup> <!-- ADDITIONAL REFERENCE PATH The list of additional reference paths to use while resolving references. For example: <AdditionalReferencePath Include="C:\MyFolder\" /> <AdditionalReferencePath Include="C:\MyFolder2\" /> --> </ItemGroup> Basically its saying some .dll file is missing? thanks

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• Best Practices - Data Annotations vs OnChanging in Entity Framework 4

  - by jptacek

  I was wondering what the general recommendation is for Entity Framework in terms of data validation. I am relatively new to EF, but it appears there are two main approaches to data validation. The first is to create a partial class for the model, and then perform data validations and update a rule violation collection of some sort. This is outlined at http://msdn.microsoft.com/en-us/library/cc716747.aspx The other is to use data annotations and then have the annotations perform data validation. Scott Guthrie explains this on his blog at http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx. I was wondering what the benefits are of one over the other. It seems the data annotations would be the preferred mechanism, especially as you move to RIA Services, but I want to ensure I am not missing something. Of course, nothing precludes using both of them together. Thanks John

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• Pushing a ABUnknownPersonViewController onto a navigation controller results in having no Navigation

  - by dermdaly

  Hi There, I'm working with the Address Book UI API on iPhone SDK 3.0. I want to present to the user the ability to create a new user, or add to an existing one, so I am using the ABUnknownPersonViewController. I have an existing navigation stack (with only 2 other views on it). Trouble is when I push the ABUnknownPersonViewController onto it, it shows up animated, etc. But there is no navigation bar, so no way to cancel. My code snippet is as follows newPersonViewController = [[ABUnknownPersonViewController alloc] init]; newPersonViewController.unknownPersonViewDelegate = self; newPersonViewController.displayedPerson = person; newPersonViewController.allowsAddingToAddressBook = YES; newPersonViewController.allowsActions = NO; [[self navigationController] pushViewController:newPersonViewController animated:YES]; Note: the current view controller does have a title, so that's not the issue. Any ideas what I am missing?

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• Using Nearest Neighbour Algorithm for image pattern recognition

  - by user293895

  So I want to be able to recognise patterns in images (such as a number 4), I have been reading about different algorithms and I would really like to use the Nearest Neighbour algorithm, it looks simple and I do understand it based on this tutorial: http://people.revoledu.com/kardi/tutorial/KNN/KNN_Numerical-example.html Problem is, although I understand how to use it to fill in missing data sets, I don't understand how I could use it as a pattern recognition tool to aim in Image Shape Recognition. Could someone please shed some light as to how this algorithm could work for pattern recognition? I have seen tutorials using OpenCV, however I don't really want to use this library as I have the ability to do the pre-processing myself, and it seems silly that I would implement this library just for what should be a simple nearest neighbour algorithm.

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• How to setup a project to use TweetSharp

  - by Stuart Helwig

  I am trying to follow Pete Brown's introductory WPF tutorial which makes use of the TweetSharp libraries to interact with Twitter. I have downloaded what appears to be the latest TweetSharp binaries (and a few others including the ReleaseCandidate) from Codeplex (http://tweetsharp.codeplex.com/). No matter what references I add and no matter what using statements I try, I cannot create a reference to the TwitterService for the FluentTwitter class. I simply get the compiler error - "The type or namespace cannot be found". Now I've noticed that the TweetSharp.dll that Pete references is 518KB but the one contained in each of my different downloads is only 84kb. (I've tried several times - I am getting the full download here). The link from Pete's article to the TweetSharp libraries, no longer works (http://code.google.com/p/tweetsharp/). What basic element am I missing here or what could I be doing wrong?

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• webclient methods not available to my Silverlight application

  - by mgkimsal

  Trying to do basic webclient data pull in C#, and the methods are not available in visualstudio, and the code is not compiling. //snip WebClient client = new WebClient(); byte[] resp = client.DownloadData(url); //snip Error 1 'System.Net.WebClient' does not contain a definition for 'DownloadData' and no extension method 'DownloadData' accepting a first argument of type 'System.Net.WebClient' could be found (are you missing a using directive or an assembly reference?) C:\Users\Michael\Documents\Visual Studio 2008\Projects\search2\search2\MainPage.xaml.cs I'm doing this in a c# file for a XAML/Silverlight project, but can't imagine why that would make a difference. I can not find any reference to this issue on the web, and I had something similar to this working last month, but in a regular ASP.NET page, not in a Silverlight app.

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• Using XAMPP Install of MySQL with Netbeans 6.8/MySQL Workbench

  - by Tom

  All, For all of this I am using Mac OSX Snow Leopard. I have happily used XAMPP to develop PHP backed sites in the past with no problems(as you'd expect for such a simple to set up package). I am now trying to set up this MySQL install in Netbeans 6.8 (for now just trying to get a sample database backed webapp to run). My issue is that even though MySQL has been started I cannot connect to it at 127.0.0.1 on port 3306 (which it is set up to use). I have read that the issue is that XAMPP holds MySQl.sock in /Applications/XAMPP/xamppfiles/... whereas MySQL Workbench and Netbeans expects to find it in /tmp/MySQL.sock. Is this correct? I've tried to set up a symbolic link from /tmp to the xmapp directory but this doesn't appear to have changed anything. Is there anything else I can try/anything that I am missing?

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• In a Rails unit test, how can I get a User fixture to load its associated Profile?

  - by MikeJ

  In the documentation concerning Fixtures (http://api.rubyonrails.org/classes/Fixtures.html) they provide the following example of using label references for associations: ### in pirates.yml reginald: name: Reginald the Pirate monkey: george ### in monkeys.yml george: name: George the Monkey pirate: reginald So following their lead, I have a User model that has_one :profile, a Profile model that belongs_to :user, and tried to set up fixtures per their example: ### in users.yml reginald: id: 1 login: reginald ### in profiles.yml reginalds_profile: id: 1 name: Reginald the Pirate user: reginald (Note: since my association is one-way, the User fixture doesn't have a "profile: reginalds_profile" association--putting it in causes an error because the SQL table has no profile_id attribute.) The problem is, in my unit tests everything seems to load correctly, but users(:reginald).profile is always nil. What am I missing?

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• copy text (Indian language- GUjarati) from word document to web page text area problem.

  - by Avinash

  Hi all, I am developing one site in Indian language (Gujarati). My problem is as below: My client wants that they able to copy Gujarati text from word document and paste into the Text area. But when i copy text from word doc and paste into text area the its get converted to the English letters. http://www.chanakyanipothi.com/gujchanakya/Gopika.ttf Above is the link of fonts which I am using. I can provide you the demo code for you to make some work on it. Is there any special thing which I am missing. Hope I am clear to you. I am running in PHP and apache. Thanks Avinash

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• Globalization for GetSystemTimeZones()

  - by user300992

  I want to get a list of timezones, so that i can populate the dropdown list. In .NET 3.5, we have TimeZoneInfo namespace, here is the code: ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones(); foreach (TimeZoneInfo timeZone in timeZones) string name = timeZone.DisplayName However, "DisplayName" is in English. How can I pass the cultureInfo so that it can return other languages? I tried setting the Thread.CurrentCulture and CurrentUICulture, it didn't work. Am I missing something?

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• Displaytag caption not working

  - by Neeraja

  I am using displaytag to render data, I have it working without any issues. As soon as I use display:caption I get JSP compilation error with the below message. Am I missing anything? I thougt including caption would be simple. If I remove display:caption everything works fine. aaaaa.jsp:527:14: This tag is not recognized. This is the table caption Jsp code: This is the table caption Setup Displaytag1.2 Web-inf/lib Displaytag-1.2.jar Displaytag-export-poi-1.2.jar Displaytag-portlet-1.2.har Itext-1.3.jar Itext-2.0.5.jar WEB-INF/tlds Displaytag.tld Displaytag-12.tld Displaytag-el.td

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• IntelliJ 9, Glassfish 2.1.1 & Maven2

  - by Xetius

  I have a Maven2 project which I am editing in IntelliJ IDEA 9.0.2. I am trying to build it and debug it within a Glassfish 2.1.1 container. This is only working sometimes. Occasionally it is giving me an error, telling me it can't deploy. Other times, it deploys, but does not run the filtering on the POM, not replacing a variable in the sun-web.xml file (and other container specific files) leaving it as ${targetenv} instead of replacing it with the value it should. I think I am missing something here, and have something very confused, but I have no idea what. Any help would be most gratefully received.

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• How to build this project?

  - by Ali Shafai

  Hi, I've been a visual studio developer for long and just trying to understand how things are in linux/unix worl. I found an open source project (Gcomandos) in source forge and tried to build it. when I download the source, I get these files: 16/02/2007 05:16 PM 25,987 aclocal.m4 16/02/2007 05:17 PM 127,445 configure 16/02/2007 05:16 PM 1,925 configure.ac 17/03/2010 03:48 PM <DIR> gComandos 16/02/2007 05:16 PM 332 gcomandos.pc.in 25/11/2006 10:03 PM 9,233 install-sh 16/02/2007 05:16 PM 353 Makefile.am 16/02/2007 05:17 PM 20,662 Makefile.in 16/02/2007 05:16 PM 1,019 Makefile.include 25/11/2006 10:03 PM 11,014 missing I am now lost. I tried making the .am or the .in files, but GnuMake says there is nothing to make. I tried running the shell scripts, but I got errors. Any guidance appreciated.

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• constructor injection using Autofac 2 and Named Registration

  - by Thad

  I am currently attempting to remove a number of .Resolve(s) in our code. I was moving along fine until I ran into a named registration and I have not been able to get Autofac resolve using the name. What am I missing to get the named registration injected into the constructor. Registration builder.RegisterType<CentralDataSessionFactory>().Named<IDataSessionFactory>("central").SingleInstance(); builder.RegisterType<ClientDataSessionFactory>().Named<IDataSessionFactory>("client").SingleInstance(); builder.RegisterType<CentralUnitOfWork>().As<ICentralUnitOfWork>().InstancePerDependency(); builder.RegisterType<ClientUnitOfWork>().As<IClientUnitOfWork>().InstancePerDependency(); Current class public class CentralUnitOfWork : UnitOfWork, ICentralUnitOfWork { protected override ISession CreateSession() { return IoCHelper.Resolve<IDataSessionFactory>("central").CreateSession(); } } Would Like to Have public class CentralUnitOfWork : UnitOfWork, ICentralUnitOfWork { private readonly IDataSessionFactory _factory; public CentralUnitOfWork(IDataSessionFactory factory) { _factory = factory; } protected override ISession CreateSession() { return _factory.CreateSession(); } }

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• Export JPG out of Dicom File With mDCM

  - by Ross Peoples

  Hello, I'm using mDCM with C# to view dicom tags, but I'm trying to convert the pixel data to a Bitmap and eventually out to a JPG file. I have read all of the posts on the mDCM Google Group on the subject and all of the code examples either don't work or are missing important lines of code. The image I am working with is a 16 bit monochrome1. I have tried using LockBits, SetPixel, and unsafe code in order to convert the pixel data to a Bitmap but all attempts fail. Does anyone have any code that could make this work. Thanks in advance P.S. Before anyone suggests trying something else like ClearCanvas, know that mDCM is the only library that suits my needs and ClearCanvas is WAY too bloated for what I need to do.

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• Compile OpenSSL from source using Xilinx EDK

  - by Asanka

  I want to use openSSL functions in my xilinx C++ project. So i downloaded the source and tried to compile using the makefile. But unfortunately the linux box I was provided did not contained the required software (perl5, make, etc) to compile the source using makefile. So as the second option i tried to compile the source as a shared library. So i made a new project using existing openSSL source. But all the attempts were failed since it gave lots of errors including missing headers, unknown defines etc. If someone knows how to compile openssl as a shared library using Xilinx toolchains please help me. It would be really helpful if someone can provide the complete project which can be opened using Xilinx EDK. If better alternative exists to use openssl with xilinx toolchains please explain that also. Thanks in advance....

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• nginx + passenger not using rackup file

  - by Callum Jones

  I have an issue where Passenger is not detecting the config.ru file for the following nginx server server { listen 80; passenger_enabled on; server_name callumj.com cjlondon.com; access_log logs/callumj.access.log; root /webapps/callumj_com/public; } Nginx just seems to ignore it and treat it as a normal web page (as I get forbidden areas when it tries to look for index.html in public). I have verified that the rackup command and execute config.ru and it boots up sucessfully. I have another server directive much like this which is powered by Rails and it seems to be working perfectly. Am I missing something? Thanks in advance!

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• C++ / error LNK2019 - XpokerEval library

  - by user1068115

  I have been struggling all the afternoon with the XPokerEval Library I downloaded here: http://www.codingthewheel.com/archives/poker-hand-evaluator-roundup#xpokereval I am trying to make the XPokerEval.PokerSim work, using Visual C++ 2010 express but i get the following errors: 1>psim_test.obj : error LNK2019: unresolved external symbol "void __cdecl SimulateHand(char const *,struct SimResults *,float,float,unsigned int)" (?SimulateHand@@YAXPBDPAUSimResults@@MMI@Z) referenced in function _wmain 1>psim_test.obj : error LNK2019: unresolved external symbol "unsigned int __cdecl RankHand(int const *)" (?RankHand@@YAIPBH@Z) referenced in function _wmain Do you think this can be due to a missing link to a library or a incompatibility with my IDE? The script uses the Pokersource Poker-Eval library which is also included in the zip file, I added to the project directories but it still does not work! I cannot figure out why and I am getting mad! Thanks in advance for any tips on this!

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