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  • Can nullptr be emulated in gcc?

    - by nuzz
    I saw that nullptr was implemented in Visual Studio 2010. I like the concept and want to start using it as soon as possible; however GCC does not support it yet. My code needs to run on both (but doesn't have to compile with other compilers). Is there a way to "emulate" it? Something like: #define nullptr NULL (but obviously that wouldn't work well at all, I was simply showing what I meant).

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  • How do I use an Entity Framework 4 model without a real database?

    - by Ivan
    I don't need any data to be stored. I'd like an application to start, create an Entity Framework entities container based on the model I've designed but having no data records in it, then generate some data (from user input and other input sources), work with it and discard all the data on close, without propagating any data operations made with EF contect to a real database hosted on server or in a file. How do I implement such a pattern? I use Entity Framework 4 and Visual Studio 2010.

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  • Access violation when running native C++ application that uses a /clr built DLL

    - by doobop
    I'm reorganzing a legacy mixed (managed and unmanaged DLLs) application so that the main application segment is unmanaged MFC and that will call a C++ DLL compiled with /clr flag that will bridge the communication between the managed (C# DLLs) and unmanaged code. Unfortuantely, my changed have resulted in an Access violation that occurs before the application InitInstance() is called. This makes it very difficult to debug. The only information I get is the following stack trace. > 64006108() ntdll.dll!_ZwCreateMutant@16() + 0xc bytes kernel32.dll!_CreateMutexW@12() + 0x7a bytes So, here are some sceanrios I've tried. - Turned on Exceptions-Win32 Exceptions-c0000005 Access Violation to break when Thrown. Still the most detail I get is from the above stack trace. I've tried the application with F10, but it fails before any breakpoints are hit and fails with the above stack trace. - I've stubbed out the bridge DLL so that it only has one method that returns a bool and that method is coded to just return false (no C# code called). bool DllPassthrough::IsFailed() { return false; } If the stubbed out DLL is compiled with the /clr flag, the application fails. If it is compiled without the /clr flag, the application runs. - I've created a stub MFC application using the Visual Studio wizard for multidocument applications and call DllPassthrough::IsFailed(). This succeeds even with the /clr flag used to compile the DLL. - I've tried doing a manual LoadLibrary on winmm.lib as outlined in the following note Access violation when using c++/cli. The application still fails. So, my questions are how to solve the problem? Any hints, strategies, or previous incidents. And, failing that, how can I get more information on what code segment or library is causing the access exception? If I try more involved workarounds like doing LoadLibrary calls, I'd like to narrow it to the failing libraries. Thanks. BTW, we are using Visual Studio 2008 and the project is being built against the .NET 2.0 framework for the managed sections.

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  • sql 2008 express connection problems

    - by user163457
    Hi, I've just installed a fresh copy of SQL 2008 Express. before I did anything I opened Management Studio and successfully connected using Window Authentication. However I tried to run the following on the command line "telnet localhost 1433" and got the error "Could not open connection to the host, on port 1433: Connect failed" I checked netstat and there is nothing listening on port 1433. Before I go any further, is there a problem with the install? thanks, Shane

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  • Unable to connect to OpenId Provider

    - by Ramesh V
    When I run in visual studio I am able to connect to openid provider, But if I host app in IIS ,I am not able to connect to openid provider. (I am getting error at CreateRequest) Please let me know what settings has to be done in IIS so that I can connect to the Openid Provider. Below is the error I am getting [InvalidOperationException: Sequence contains no elements] System.Linq.Enumerable.First(IEnumerable`1 source) +336 DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty.CreateRequest(Identifier userSuppliedIdentifier) [ProtocolException: No OpenID endpoint found.] DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty.CreateRequest(Identifier userSuppliedIdentifier)

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  • scripting fruityloops or propellerheads reason from VB or Python?

    - by interstar
    I have both Fruityloops and Propellerheads Reason software synths on my Windows PC. Any way I can get at and script these from either Visual Basic or Python? Or at least send Midi messages to the synths from code? Update : attempts to use something like a "midi-mapper" (thanks for link MusiGenesis) don't seem to work. I don't think Reason or FL Studio act like standard GM Midi synths. Update 2 : If you're interested in this question, check out this too.

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  • Finding unused classes in C# app.

    - by duder
    I'm a C#/.net/Visual Studio noob. I inherited a half-completed C# application for a mobile phone. In the course of debugging, I came across several half-finished classes that don't seem to be used anywhere else in the code. Is there a way to get determine if a class definition is instantiated anywhere?

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  • Adding a reference to a css file in an ascx file in vs2008 only to get intellisense

    - by Nick Allen - Tungle139
    Normally visual studio brings up intellisense for available css classes, which it draws from css files linked to the current aspx/master document. Is there a way to get this to work in an ascx file in a similar way to referencing external JavaScript files in js files for the purpose of intellisense /// <reference path="jquery-1.4.1.js" /> I only want this for the purpose of intellisense and not getting squiggly lines under un-recognised classes. My css files will be actually linked from the aspx/master page.

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  • In-line assembly

    - by aCuria
    For the below code, if i want to convert the for loop to in-line assembly, how would it be done? (Pardon the weird code, i just made it up.) 1) This is for the x86, using visual studio 2) This is a "how to use in line assembly" question, not a "how to optimize this code" question 3) Any other example will be fine. I will think of some better example code in abit.

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  • How to make a simple grafical interface in C# for DCRAW

    - by Espinas.iss
    Hello, i have a problem. I need to make a simple GUI in Visual Studio 2008 using C Sharp that uses a Dave Coffins DCRAW written in C but I don't know how to "connect" dcraw.c (DCRAW source code) file with Csharp... UFRAW is the example of grafical interface that uses dcraw but I can't find it's source code. My application should be very simple: to recognize raw file on digital camera or any disc and uses one interpolatio algorithm on that raw file.

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  • Good way to make changes to production database / source code

    - by This is it
    Hi I'm interested to find out what would be the good way to make changes to production database and source code in web application (ASP.NET, SQL Server 2008). A little bit more details, we develop on local machines, and then we need to transfer the code and database changes to production (pretty much standard story). At the moment we do it in the evening, change the database directly from management studio on production server, and then just overwrite the existing asp.net code (copy/past). Thanks

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  • Moving from Windows to Ubuntu.

    - by djzmo
    Hello there, I used to program in Windows with Microsoft Visual C++ and I need to make some of my portable programs (written in portable C++) to be cross-platform, or at least I can release a working version of my program for both Linux and Windows. I am total newcomer in Linux application development (and rarely use the OS itself). So, today, I installed Ubuntu 10.04 LTS (through Wubi) and equipped Code::Blocks with the g++ compiler as my main weapon. Then I compiled my very first Hello World linux program, and I confused about the output program. I can run my program through the "Build and Run" menu option in Code::Blocks, but when I tried to launch the compiled application externally through a File Browser (in /media/MyNTFSPartition/MyProject/bin/Release; yes, I saved it in my NTFS partition), the program didn't show up. Why? I ran out of idea. I need to change my Windows and Microsoft Visual Studio mindset to Linux and Code::Blocks mindset. So I came up with these questions: How can I execute my compiled linux programs externally (outside IDE)? In Windows, I simply run the generated executable (.exe) file How can I distribute my linux application? In Windows, I simply distribute the executable files with the corresponding DLL files (if any) What is the equivalent of LIBs (static library) and DLLs (dynamic library) in linux and how to use them? In Windows/Visual Studio, I simply add the required libraries to the Additional Dependencies in the Project Settings, and my program will automatically link with the required static library(-ies)/DLLs. Is it possible to use the "binary form" of a C++ library (if provided) so that I wouldn't need to recompile the entire library source code? In Windows, yes. Sometimes precompiled *.lib files are provided. If I want to create a wxWidgets application in Linux, which package should I pick for Ubuntu? wxGTK or wxX11? Can I run wxGTK program under X11? In Windows, I use wxMSW, Of course. If question no. 4 is answered possible, are precompiled wxX11/wxGTK library exists out there? Haven't tried deep google search. In Windows, there is a project called "wxPack" (http://wxpack.sourceforge.net/) that saves a lot of my time. Sorry for asking many questions, but I am really confused on these linux development fundamentals. Any kind of help would be appreciated =) Thanks.

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  • Websites and web applications?

    - by IP
    (From the point of view of a user, not how it's built or which option is selected in Visual Studio) ...What is the difference between a "website" and a "web application"? Is there a difference? Are there characteristics that characterise the two?

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  • MVC Entity Framework: Cannot open user default database. Login failed.

    - by Michael
    This type of stuff drives me nuts. I'm having trouble finding the exact issue that I'm having, maybe I just don't know the terminology. Anyway, I had a working website using MVC and Entity Framework, but then I coded an error in a partial view page (ascx). Then all of a sudden I started to get this message. Cannot open user default database. Login failed. Login failed for user 'NT AUTHORITY\SYSTEM' I've found plenty of suggestions about opening SQL Server Management Studio, Double Click on Security, Double Click on Logins, Double click on NT AUTHORITY\SYSTEM and then double click on User Mapping. In this view I'm suppose to check the box for my database so that this user is mapped to this login. However, since I created my database in Visio Studio 2008 as part of my solution, it doesn't show up to allow me to click on it. So what do I do now? What drives me nuts is that everything was working fine. I was using my computer name to access the website and everything was working fine until the coding error. I've fix the error but still getting the error. I should also mention that this error started yesterday too around the same time but later cleared itself up. If I use localhost to access the site, it works just fine. IIS7 configuration for my website: Application Pool = DefaultAppPool Physical Path Credentials Logon = ClearText With in connection strings. I do see the one for my database in this solution. Entry Type is local metadata=res://*/Models.DataModel.csdl|res://*/Models.DataModel.ssdl|res://*/Models.DataModel.msl; provider=System.Data.SqlClient; provider connection string="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\FFBall.mdf;Integrated Security=True;User Instance=True;MultipleActiveResultSets=True" And somewhere I remember changing the identity from Network Service to LocalSystem. Because when I first stared I was getting this same message, but I changed this value and it started working. I saw that suggested somewhere too but I do not recall. Wait I remember now, I believe in IIS7, under Application Pools, DefaultAppPool identity is set to LocalSystem. Additional things I've tried. Restart the computer Recycle the application pool. Antivirus isn't running. Any help would be appreciated. Thank you in advance.

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  • System of linear equations in C++?

    - by Archagon
    I need to solve a system of linear equations in my program. Is there a simple linear algebra library for C++, preferably comprised of no more than a few headers? I've been looking for nearly an hour, and all the ones I found require messing around with Linux, compiling DLLs in MinGW, etc. etc. etc. (I'm using Visual Studio 2008.)

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  • C# DLL Deployed in COM+. Error while accessing the methods.

    - by Dakshinamurthy
    I have the C# Dll (ABService) deployed in COM + and my os Is windows 2008. I have given the strong name for this dll and its dependent dll’s When I access the method of this dll through localhost or if I add the reference to the client project the method are executed successfully. Simply if I access the dll from the same machine with the reference it is working. So I think there is no problem with the way I deployed in the COM +. I have the doubt whether I have the problem in OS and Visual Studio 2008 combination. I have built all the dll with the Visual Studio 2008 with Target cpu as x86 and targert framework as 2.0. I have given in below the codes I have tried with and the errors. I need to create the object for the dll in server machine(64 bit) and access its method from the client(32 bit) Code : Type svr = Type.GetTypeFromProgID("ABService.Service", strserver1url[2],false); ABService.Service service1= (ABService.Service)Activator.CreateInstance(svr); strresult = service1.ExecuteService(orequest.xml); Error :{"Retrieving the COM class factory for remote component with CLSID {77BF00E0-41AC-3967-9E72-A4927CC0B880} from machine 10.105.138.64 failed due to the following error: 80040154."} Code Type svr = Type.GetTypeFromProgID("ABService.Service", strserver1url[2],true); object Service1 = null; Service1 = (ABService.Service)Activator.CreateInstance(svr, true); strresult = Convert.ToString(ReflectionHelper.Invoke(Service1, "ExecuteService", new object[] { orequest.xml })); Service1 = null; Error: Retrieving the COM class factory for remote component with CLSID {77BF00E0-41AC-3967-9E72-A4927CC0B880} from machine ftpsite failed due to the following error: 80040154. With the below code instead of C#.Net dll if i have the vb dll in Com + the method is executed successfully. Code ords = new RDS.DataSpace(); ords.InternetTimeout = 600000; object M_Service = null; ABService.Service oabservice = null; M_Service = ords.CreateObject("ABService.Service",url); strresult = Convert.ToString(ReflectionHelper.Invoke(M_Service, "ExecuteService", new object[] { orequest.xml })); Error : {"Object doesn't support this property or method 'ExecuteService'"} Code object obj=Interaction.CreateObject("ABService.Service", "10.105.138.64"); strresult = Convert.ToString(ReflectionHelper.Invoke(obj, "ExecuteService", new object[] { orequest.xml })); Error: {"Cannot create ActiveX component."} Code object obj = Activator.GetObject(typeof(ABService.Service), @"http://10.105.138.64:80/ABANET"); strresult = Convert.ToString(ReflectionHelper.Invoke(obj, "ExecuteService", new object[] { orequest.xml })); Error: InnerException {"The remote server returned an error: (405) Method Not Allowed."} System.Exception {System.Net.WebException} Message "Exception has been thrown by the target of an invocation.”

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  • How can I programmatically drop a SQL Server database from .NET code

    - by Craig Shearer
    I'm trying to drop a SQL Server database from .NET code. I've tried using the SMO classes but get an exception saying the database is in use. Then I tried executing a query (opening a SqlConnection, executing a SqlCommand), along the lines of: ALTER DATABASE foo SET SINGLE_USER WITH ROLLBACK IMMEDIATE (pause) DROP DATABASE foo But still I get an exception saying the database is in use. How do I do this? (Or, how does SQL Server Management Studio implement the Drop database and close existing connections?)

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  • Should I invest time in learning about OR\M or LINQ?

    - by Peter Smith
    I'm a .NET web developer primarily who occasionally writes console applications to mine data, cleanup tasks, etc. Most of what I do winds up involving a database which I currently design via sql server management studio, using stored procedures, and query analyzer. I also create a lot of web services which are consumed via AJAX applications. Do these technologies really help you in speeding up development times? Do you still have to build the database or object code first?

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  • how to give size of a control in window mobile app

    - by zebamuskan
    how to give size of a control in window mobile app dynamically,because i have developed one application,when i used to run that application on different emulator's ,the size of that control's in that application differ's for different emulator.so could u plz help me that how we can handle such issue in windows mobile application in which iam using visual studio 2008 and windows mobile6 classical emulator

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  • How to organize makefiles / solutions etc. in multiplatform projects?

    - by Michal Czardybon
    I have a project which can be compiled with Visual Studio, GCC and with some embedded compilers. Sources are shared, but each platform requires separate makefiles, project files, solutions etc. There are two ways I can organize them: Intermixed in a single hierarchy of folders With separate folders for platform-dependent files The first solution creates some confusion about which file belongs to which platform, but the second causes some repetition of the folders structure (some compilers require each project to have a separate folder). Which do you think is better?

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