Iserviceprovider Error

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Error C2872: 'filetime' : Ambiguous Symbol

community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Issue in compiling with marshal.h : error C2872: 'IServiceProvider' : ambiguous symbol up vote 18 down

Error C2872 Ambiguous Symbol

vote favorite 2 I am trying to use the marshalling library in my C++/CLI project. When compiled with #include I get the error error C2872: 'IServiceProvider' : ambiguous symbol. Most of the resolutions seems to be suggesting moving #include like the one here -> Ambiguous references, but I dont have those includes. All I have is: using namespace System; using namespace System::Configuration; using namespace std; #include How do error c2872: 'idataobject' : ambiguous symbol I debug this issue ? c++-cli share|improve this question asked Oct 22 '10 at 20:21 anivas 3,93231729 add a comment| 1 Answer 1 active oldest votes up vote 26 down vote accepted You do, indirectly, marshal.h includes it. It dumps an enormous amount of identifiers in the global namespace. The macros are especially awkward, lots of them match names used in the framework. Lots of things that marshal.h does can be done by the Marshal class as well. But I can't help you with that, you didn't mention why you want to use it. You can solve this particular mishap by putting the #include directive before the using statements: #include using namespace System; using namespace System::Configuration; share|improve this answer answered Oct 22 '10 at 20:36 Hans Passant 655k819631606 I am trying to convert String ^ to const char* –anivas Oct 22 '10 at 20:48 2 Marshal::StringToCoTaskMemAnsi + Marshal::FreeCoTaskMem. –Hans Passant Oct 22 '10 at 23:15 Can also use System::String^ to avoid usings in header –slater Nov 10 '14 at 19:29 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Ema

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System::string To Std::string

Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Samples Retired content We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Migration Guide Part II: PInvoke and COM Interoperability Naming Conflicts Naming Conflicts Ambiguous References Ambiguous References Ambiguous References Ambiguous References Macros http://stackoverflow.com/questions/4000663/issue-in-compiling-with-marshal-h-error-c2872-iserviceprovider-ambiguous and the Preprocessor TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Ambiguous References Visual Studio .NET 2003 Sometimes the names of the https://msdn.microsoft.com/en-us/library/aa712965(v=vs.71).aspx .NET Framework Library classes, interfaces, or members are the same as those defined in commonly used header files such as windows.h. This can lead to naming conflicts or ambiguities in applications that involve interoperating with native code. The following example demonstrates an ambiguous name. Example Copy #using using namespace System; #include int main() { return 0; } In the above example, the using declaration in using namespace System; makes names from the System namespace accessible to the entire program. One of these names is IServiceProvider. However, windows.h indirectly contains #include servprov.h, which has the following declaration. Copy typedef interface IServiceProvider IServiceProvider; Since the using declaration precedes the #include directive, the name IServiceProvider becomes ambiguous. Solving Ambiguous References One way to overcome this problem is to include the unmanaged headers first, before any managed using declarations. In this order, the compiler can process the unmanaged headers first and the ambiguity does not occur unless

easy but it wasn't working. [Note: Microsoft factored CString from MFC several years ago, so CString https://qualapps.blogspot.com/2008/07/using-atlstrh-in-managed-project.html can now be used standalone. Super handy class.]I started with what https://github.com/aspnet/DependencyInjection/issues/385 I thought was a reasonable statement:
#include "cstringt.h"
This gave me numerous errors, starting with:C:\Program Files\Microsoft SDKs\Windows\v6.0\Include\ocidl.h(6238) : error C2872: 'IServiceProvider' : ambiguous symbol
C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\include\atlcomcli.h(370) : error C2872: 'DISPPARAMS' : ambiguous symbolWith a little research, I determined I was using the ambiguous symbol wrong include file. So I switched to:
#include "atlstr.h"
When I tried to do that, I received similar errors:
C:\Program Files\Microsoft SDKs\Windows\v6.0\Include\ocidl.h(6238) : error C2872: 'IServiceProvider' : ambiguous symbol
C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\include\atlcomcli.h(370) : error C2872: 'DISPPARAMS' : ambiguous symbol
Several other posts inquiring about the same errors received no answers.The problem is caused because : ambiguous symbol the Microsoft SDK (aka Platform SDK) and mscorlib both have definitions for these classes.The solution is to take the #include file that caused the problem and make sure it is placed before any "using namespace" statement. In my case, that meant moving #include near the top of stdafx.h. Posted by Jim Beveridge at 12:05 PM 12 comments: GoogledMay 7, 2009 at 12:31 AMFinally one quick solution after lot of googling. Thank you very much.ReplyDeleteAnonymousMay 19, 2009 at 8:06 AMThanks!ReplyDeleteAnonymousJune 1, 2009 at 11:53 AMThank you so much....it was a HUGE help!!ReplyDeleteAnonymousNovember 23, 2009 at 5:37 PMAwesome, but I still don't fully understand why it works.ReplyDeleteAnonymousSeptember 20, 2010 at 5:59 AMHi JimI am facing similar problem but unable to fis it.I am making a project and attaching a library code in it. Both projects are made with same project setting . In library project i have header file where i typedef CString but when i am compiling the main project I am getting following errorsC:\Program Files\

Sign in Pricing Blog Support Search GitHub This repository Watch 173 Star 429 Fork 165 aspnet/DependencyInjection Code Issues 30 Pull requests 1 Projects 0 Wiki Pulse Graphs New issue The type 'IServiceProvider' is defined in an assembly that is not referenced #385 Closed xatabhk opened this Issue Mar 15, 2016 · 14 comments Projects None yet Labels None yet Milestone No milestone Assignees No one assigned 6 participants xatabhk commented Mar 15, 2016 services.AddTransient(s => new PhysicalFileProvider(s.GetRequiredService().ApplicationBasePath)); dnx web Error: C:\downloads\web\projects\zaxitech_core\src\tbweb\Startup.cs(105,4): .NETFramework,Version=v4.5.1 error CS0012: The type 'IServiceProvider' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.ComponentModel, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. Adding System.ComponentModel to project.json will not help. aspnet member davidfowl commented Mar 15, 2016 Can you put your project on github and also say what DNX version you are using? xatabhk commented Mar 15, 2016 Here is the sample. dnx --version Microsoft .NET Execution environment Version: 1.0.0-rc2-16595 Type: Clr Architecture: x86 OS Name: Windows OS Version: 10.0.10586 Runtime Id: win10-x86 dotnet --version .NET Command Line Tools (1.0.0-beta-001747) Product Information: Version: 1.0.0-beta-001747 Commit Sha: 58a8a10d41 Runtime Environment: OS Name: Windows OS Version: 10.0.10586 OS Platform: Windows Runtime Id: win10-x64 Steps: dnu restore dnx web Error: Startup.cs(99,4): .NETFramework,Version=v4.5.1 error CS0012: The type 'IServiceProvider' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.ComponentModel, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. If 'dotnet restore' used, there will be another error: 'An item with the same ke