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• Mandatory Parameters in Request object (WCF)

  - by Martin Moser

  lHi, I'm currently writing a WCF service. One of those methods get's a request object and returns a response object. In the request there are a couple of value-type members. Is there a way to define members are mandatory in the declarative way? I'm in an early stage of development and I don't want to start with versioning now. In addition I don't want to have method sig with 25 parameters, therefore I created the request object. The problem I have is that due to the value-types, I can never be sure if the consumer of the service intended to have the default value in there, or it was just by lazyness. On consumer side you don't easily detect that you probably missed that property. So I would like to have something that forces the caller of the service to provide an value, and if not he ideally get's a compile-time error. any ideas? tia, Martin

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• GWT on Python App Engine

  - by Koran

  Hi, I have a python app engine code (matured backend) - and we are now planning to have a front end for that code. I was wondering whether it is possible to implement GWT as the front end. Even though Alex Martelli in this post [1] mentions it is not possible, a comment to that post suggests that it is indeed possible using rpc over json for GWT. I was unable to understand how this is possible. In app.yaml file, we have to specify the language to be python, right? In that case, how can it compile GWT based on JAVA? Are there any examples on anyone doing that? Can someone help me out? It would be extremely helpful. [1]: http://stackoverflow.com/questions/1085898/choosing-java-vs-python-on-google-app-engine/1087878#1087878 link

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• Visual Studio 2008 Explicit Reference Error

  - by Alan

  I have a project which references a dll in the same solution (called "Common"). Common has two types of errors with the same names but different namespaces i.e. Common.Login.UserDeleted Common.Imaging.UserDeleted When I type UserDeleted visual studio recognizes both of these and asks for which it is ("ambiguous reference"). I right-click UserDeleted and select one of the two above, yet it then says that the type or reference doesn't exist! It doesn't make any sense. Why is this happening? I can't compile my program until I find a solution to this, thanks

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• How to prevent Debug.Assert(...) to show a modal dialog

  - by Martin

  I have a couple of libraries which use Debug.Assert(...). I think that the Debug.Assert(...) are fine and I still want them to execute, but I don't want them to block the execution of my application. Ideally, I would only like them to be logged somewhere. Given that I can't change the code of the libraries (and that I still want to compile in debug and run the assertion), how do I prevent Debug.Assert(...) to show a modal dialog? Thanks!

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• Hashing a python method to regenerate output when method is modified

  - by Seth Johnson

  I have a python method that has a deterministic result. It takes a long time to run and generates a large output: def time_consuming_method(): # lots_of_computing_time to come up with the_result return the_result I modify time_consuming_method from time to time, but I would like to avoid having it run again while it's unchanged. [Time_consuming_method only depends on functions that are immutable for the purposes considered here; i.e. it might have functions from Python libraries but not from other pieces of my code that I'd change.] The solution that suggests itself to me is to cache the output and also cache some "hash" of the function. If the hash changes, the function will have been modified, and we have to re-generate the output. Is this possible or a ridiculous idea? If this isn't a terrible idea, is the best implementation to write f = """ def ridiculous_method(): a = # # lots_of_computing_time return a """ , use the hashlib module to compute a hash for f, and use compile or eval to run it as code?

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• R.java file not updating with UI element's id

  - by Mohit Deshpande

  I added some UI elements to the main.xml file in the res\layout folder and when I try to access them through the call, R.layout.my_uielement, the UI element that I created is not there. Even when I add a new xml file with UI elements, it still doesn't show up in the R.layout class. I have made checked the ids on them and they have the correct format (I think): android:id="@+id/my_button". What could be the problem? Do I need to compile the code first?

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• Internal compiler error: Could not load type NHibernate.Cfg.Configuration

  - by Simon

  I'm referencing the NHibernate dll version 2.1.2-GA, and am unable to compile under Mono 2.8.1. I've tried using NHibernate 3 instead and it compiles fine. A simple example of the code that's failing is NHibernate.Cfg.Configuration cfg = new NHibernate.Cfg.Configuration(); and the error is Error CS0584: Internal compiler error: Could not load type 'NHibernate.Cfg.Configuration' from assembly 'NHibernate, Version=2.1.2.4000, Culture=neutral, PublicKeyToken=aa95f207798dfdb4'. (CS0584) As mentioned it compiles with no problems using NHibernate 3, does anyone have any ideas how to get it working with NHiberate 2.1.2?

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• Using Tortoise SVN with C++ in Visual Studio 2008

  - by Dr. Monkey

  I have an online repository with some .h and .cpp files that make up part of a project. I'm trying to check these out and use them in a new project, but am getting errors (C4627 and C1010). All the files have been added to the project (with AddExisting Item...), and the subdirectories that contain these files have been added to the "Additional include directories" of the project. Would I be better off having the entire project tree in the repository? My reason for not doing so is that my colleague and I are working on different parts of the code and so want to use different main methods to test things as we go, and I didn't see any need to be passing around any compiled code etc. since I assumed that given the .h and .cpp files (with the correct settings), visual studio would be able to compile the project. What's the best way to make Visual Studio 2008 and TortoiseSVN work well together (without spending any money)?

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• .NET generic class instance - passing a variable data type

  - by FerretallicA

  As the title suggests, I'm tyring to pass a variable data type to a template class. Something like this: frmExample = New LookupForm(Of Models.MyClass) 'Works fine Dim SelectedType As Type = InstanceOfMyClass.GetType() 'Works fine frmExample = New LookupForm(Of SelectedType) 'Ba-bow! frmExample = New LookupForm(Of InstanceOfMyClass.GetType()) 'Ba-bow! LookupForm<Models.MyClass> frmExample; Type SelectedType = InstanceOfMyClass.GetType(); frmExample = new LookupForm<SelectedType.GetType()>(); //Ba-bow frmExample = new LookupForm<(Type)SelectedType>(); //Ba-bow I'm assuming it's something to do with the template being processed at compile time but even if I'm off the mark there, it wouldn't solve my problem anyway. I can't find any relevant information on using Reflection to instance template classes either. (How) can I create an instance of a dynamically typed repository at runtime?

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• Android and Kernel-Modules...

  - by Nils Pipenbrinck

  So - Android is build on top of a stripped down linux system. Most of the convenient utilities are missing but all the basics are there. I can call insmod and rmmod. No problem. But where do kernel-modules and firmware files reside? I can't find any. there is no /lib/modules in the standard distribution. Problem: I need modules. For sure don't want to compile support for each and every usb-device in the world into the linux-kernel. Where should I put them?

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• Xalan redirect:write , use either of two element values to create name of new .xml file depending on

  - by Bilzac

  So I have the following code: <redirect:write select="concat('..\\folder\\,string(filename),'.xml')"> Where "filename" is a tag in the xml source. My problem occurs when filename is null or blank. And this is the case for several of the xml filename tags. So what I am trying to implement is a checking method. This is what I have done: <xsl-if test = "filename != ''"> <xsl:variable name = "tempName" select = "filename" /> </xsl-if> <xsl-if test ="filename = ''"> <xsl:variable name = "tempName" select = "filenameB"/> </xsl-if> <redirect:write select="concat('..\\folder\\,string($tempName),'.xml')"> I seem to be getting NPEs when I compile my Java code, saying the Variable not resolvable: tempName

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• Ignoring generated files when using "Treat warnings as errors"

  - by krystan honour

  We have started a new project but also have this problem for an existing project. The problem is that when we compile with a warning level of 4 we also want to switch on 'Treat all warnings as errors' We are unable to do this at the moment because generated files (in particular reference.cs files) are missing things like XML comments and this generates a warning, we do not want to suppress the xml comment warnings totally out of all files just for specific types of files (namely generated code). I have thought of a way this could be achieved but am not sure if these are the best way to do this or indeed where to start :) My thinking is that we need to do something with T4 templates for the code that is generated such that it does fill in XML documentation for generated code. Does anyone have any ideas, currently I'm at well over 2k warnings (its a big project) :(

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• static library vs dynamic libraries

  - by user295030

  Can someone please explain in easy terms what is static library linking vs dynamic library linking other one has a larger memory map than the other or that the static library is used to compile/link with the program that will use it versus being loaded at runtime? I also need to create a static library of a program that I made in vs2008 and give one function interface to access the library. one of the requirements reads as such " * API should be in the form of static library. company xxx will link the library into a third party application to prevent any possible exposure of the code(dll)" how can they say both static and dll at the same time. I have never works with static library before. So please any help would be nice.

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• Best C++ Linux IDE [closed]

  - by Idan

  Possible Duplicate: Best unix/linux C++ debuger/IDE ? Hey, I've been searcing and reading about a good Linux C++ IDE, and couldn't set my mind on the right one. I've been using Eclipse with the C++ pluging , for C development, for the last couple months, but I found it not very useful, especially the debugging process that was quite annoying. I love Vistal Studio, so I'm looking for something really close to it. I need an IDE that will provide me, among other things: - rich debugging options - easy to use graphical designer - underscores error/warning (before I compile - like eclipse has) - Intellisense and more... Any suggestion? Maybe NetBeans?

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• Interacting with java code from C#

  - by Qua

  We've written a Java program which we are looking to use and interact with from C#. What are our options? Optimally it would be possible to compile the Java application as a library (.DLL) that we could reference from C# perhaps using P/Invoke. This, however, doesn't appear to be an option according to the first few searches online. We opt to be able to use ASP.NET to built a search engine powered by the Java code, so if this opens up for any other options please let us know.

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• Only compiles as an array of pointers, not array of arrays

  - by Dustin

  Suppose I define two arrays, each of which have 2 elements (for theoretical purposes): char const *arr1[] = { "i", "j" }; char const *arr2[] = { "m", "n" }; Is there a way to define a multidimensional array that contains these two arrays as elements? I was thinking of something like the following, but my compiler displays warnings about incompatible types: char const *combine[][2] = { arr1, arr2 }; The only way it would compile was to make the compiler treat the arrays as pointers: char const *const *combine[] = { arr1, arr2 }; Is that really the only way to do it or can I preserve the type somehow (in C++, the runtime type information would know it is an array) and treat combine as a multidimensional array? I realise it works because an array name is a const pointer, but I'm just wondering if there is a way to do what I'm asking in standard C/C++ rather than relying on compiler extensions. Perhaps I've gotten a bit too used to Python's lists where I could just throw anything in them...

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• .NET C# setting the value of a field defined by a lambda selector

  - by Frank Michael Kraft

  I have a generic class HierarchicalBusinessObject. In the constructor of the class I pass a lambda expression that defines a selector to a field of TModel. protected HierarchicalBusinessObject (Expression<Func<TModel,string>> parentSelector) A call would look like this, for example: public class WorkitemBusinessObject : HierarchicalBusinessObject<Workitem,WorkitemDataContext> { public WorkitemBusinessObject() : base(w => w.SuperWorkitem, w => w.TopLevel == true) { } } I am able to use the selector for read within the class. For example: sourceList.Select(_parentSelector.Compile()).Where(... Now I am asking myself how I could use the selector to set a value to the field. Something like selector.Body() .... Field...

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• Missing safe control entry

  - by Stefan Hennicken

  I've got a working hello-world like webpart for my SPS3.0 I can compile, pack and deploy it using VS2008, makecab.exe and stsadm. So I know the theory of deploying sharepoint webparts. My problem: After I inserted an additional .webpart file, an elements.xml and a feature.xml to deploy the .webpart file and get knowledge about adding features to my webpart, the deployed webpart is missing its safe control entry in the web.config. But the dll can be found in the gac and my features are also deployed to the right folders. I didn't change anything in my manifest.xml especially not in it's -tag, because it definitely worked before i added my additional feature files. Can anybody help me? Should i provide you some code snippets? Thanks Stefan

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• Linking to a C library compiled as C++

  - by Jacob

  I'm in linker paradise now. I have a C library which only compiles in Visual C++ (it probably works in gcc) if: I compile it as C++ code Define __cplusplus which results in all the declarations being enclosed in extern "C" { } So, by doing this I have a static library called, say, bsbs.lib Now, I have a C++ project called Tester which would like to call function barbar in declared in bsbs.h. All goes fine, until I try to link to bsbs.lib where I get the all-too-familiar: Tester.obj : error LNK2001: unresolved external symbol _foofoo And it always seems to be foofoo which cannot be resolved regardless of which function I call in Tester (barbar or anything else).

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• what is wrong with this insert method in asp.net mvc?

  - by Pandiya Chendur

  My controller calls a repository class method on insert, [AcceptVerbs(HttpVerbs.Post)] public ActionResult Create([Bind(Exclude = "Id")]FormCollection collection) { try { MaterialsObj materialsObj = new MaterialsObj(); materialsObj.Mat_Name = collection["Mat_Name"]; materialsObj.Mes_Id = Convert.ToInt64(collection["MeasurementType"]); materialsObj.Mes_Name = collection["Mat_Type"]; materialsObj.CreatedDate = System.DateTime.Now; materialsObj.CreatedBy = Convert.ToInt64(1); materialsObj.IsDeleted = Convert.ToInt64(1); consRepository.createMaterials(materialsObj); return RedirectToAction("Index"); } catch { return View(); } } and my repository class has this, public MaterialsObj createMaterials(MaterialsObj materialsObj) { db.Materials.InsertOnSubmit(materialsObj); return materialsObj; } But when i compile this i get The best overloaded method match for 'System.Data.Linq.Table<CrMVC.Models.Material>.InsertOnSubmit(CrMVC.Models.Material)' has some invalid arguments... cannot convert from 'CrMVC.BusinessObjects.MaterialsObj' to 'CrMVC.Models.Material'.. am i missing something?

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• Referencing external classes

  - by moppel

  My Android project references external classfiles that are not included in the in the Android SDK. I added those classes as an external library properly in eclipse. The code compiles with no problem. But as I try to run the application I get an ClassNotFoundException by the DalvikVM, although all the neccessary classes have been ported. Am I missing something? The steps I did. create new folder in eclipse android project. copy neccessary classes in this folder. add the folder to the classpath via eclipse. programm compile run as android application -- Exception

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• Google chrome, native client support and development

  - by hbt

  Hey guys, I would like to write a small C++ app and run it on chrome using the native client API. I have a few questions though: 1) I compiled the examples on Ubuntu and ran the code on firefox but can't run it on chrome (using version 5.0.342.7 beta) Do I need to install something? An extension/plugin? 2) I can't find a single online application I could run? Links anyone, I want to see the power of this thing without having to compile the code locally. Thanks for your help, -hbt PS: I don't know what's the policy with asking multiple questions. If it's a problem, let me know and I will create multiple threads.

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• Visual Studio detaches from application as soon as debugging starts

  - by rwmnau

  I have a web application that I've always been able to run in Visual Studio and it debugs just fine (breakpoints work, I can pause execution, etc). Recently, the behavior changed suddenly, and a few things happen: I start debugging, it lauches IE and loads the application, but after a few seconds (sometimes the page hasn't even displayed yet), Visual Studio acts as if debugging has stopped - I'm able to edit code in VS again, and the "Play" button on the toolbar is enabled. The application continues to run in the IE window just spawned, but I'm not attached to it During this few seconds that VS is "debugging", because it detaches, my breakpoints show as hollow - as if I'm set to "Release" mode and they won't be hit. In fact, I have a breakpoint set in Page_Load, and it skips right by. I've checked, and I'm set to debug mode, though the compile mode dropdown is missing from my toolbar (I checked in the build properties to ensure I was in debug mode). Can anybody shed some light here?

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• How can I create different DLLs in one project?

  - by jaloplo

  I have a question I don't know if it can be solved. I have one C# project on Visual Studio 2005 and I want to create different DLL names depending on a preprocessor constant. What I have in this moment is the preprocessor constant, two snk files and two assembly's guid. I also create two configurations (Debug and Debug Preprocessor) and they compile perfectly using the snk and guid appropiate. #if PREPROCESSOR_CONSTANT [assembly: AssemblyTitle("MyLibraryConstant")] [assembly: AssemblyProduct("MyLibraryConstant")] #else [assembly: AssemblyTitle("MyLibrary")] [assembly: AssemblyProduct("MyLibrary")] #endif Now, I have to put the two assemblies into the GAC. The first assembly is added without problems but the second isn't. What can I do to create two or more different assemblies from one Visual Studio project? It's possible that I forgot to include a new line on "AssemblyInfo.cs" to change the DLL name depending on the preprocessor constant?

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• Visual C++ 2010 solution-wide macros with parameters

  - by OregonGhost

  I'm trying to compile some source code with Visual C++ 2010 Express. The code was written for GCC, and contains attributes like this: struct something { ... } __attribute__((packed)); Since this is not standard C++ syntax, Visual C++ doesn't recognize it. With this macro prior to the struct declaration, it works fine: #define __attribute__(p) But I don't want to alter the files. I created a new property sheet (GccCompat), and went to Preprocessor Definitions, and added the macro, like this: __attribute__(p) or like this: __attribute__(p)= But it doesn't work. It's simply not called. If I define just __attribute__ (without parameters) in the same location, the macro is correctly defined. Note that the command line that is generated looks fine (the macros with parameters are passed exactly the same as the ones without), but the compiler seems to ignore it. So, how can I globally define my macro with a parameter?

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