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Iserviceprovider Ambiguous Symbol Error

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Error C2872: 'filetime' : Ambiguous Symbol

Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Issue in error c2872 ambiguous symbol compiling with marshal.h : error C2872: 'IServiceProvider' : ambiguous symbol up vote 18 down 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 error c2872: 'idataobject' : ambiguous symbol have those includes. All I have is: using namespace System; using namespace System::Configuration; using namespace std; #include How do 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 &

> Visual C++ Question 0 Sign in to vote Trying to compile a C++ WinForms Winsock related project with /clr option I get a

System::string To Std::string

few errors after adding #include statement. The reference is to a different header file: servprov.h. There is no direct reference in any of my files to this header. I verified it with quick find command. There is no reference to it in winsock2.h either. I do not know where the reference is coming from. Thus my first question is this: how come http://stackoverflow.com/questions/4000663/issue-in-compiling-with-marshal-h-error-c2872-iserviceprovider-ambiguous I get errors (8 total) from a header file that is not a part of my project explicitly. As far as I could determine, serprov.h is being referred via #include in four other headers and in them only: ocidl.h, urlmon.h, propbag2.h, and atliface.h In any event I have to deal with it. This is one of the errors: BonnerComponent.cppc:\program files\microsoft visual https://social.msdn.microsoft.com/Forums/vstudio/en-US/92c473d6-c963-44fa-9150-6c6af502112b/ambiguous-symbol?forum=vcgeneral studio 8\vc\platformsdk\include\servprov.h(93) : error C2872: 'IServiceProvider' : ambiguous symbol        could be 'c:\program files\microsoft visual studio 8\vc\platformsdk\include\servprov.h(48) : System::IServiceProvider IServiceProvider'        or 'c:\winnt\microsoft.net\framework\v2.0.50727\mscorlib.dll : System::IServiceProvider' The file in question: BonnerComponent.cpp has but two statements (computer generated): #include "StdAfx.h"#include "BonnerComponent.h" They've been there for days. What can I do about it? Thanks for help.  Wednesday, May 31, 2006 4:34 PM Reply | Quote Answers 3 Sign in to vote Actually I just realized that there is, what may be, an easier solution. Your code (or some wizard generated code) must have something like the following: using namespace System;...#include

You should move the using-directive after the #include #include ...using namespace System;

  Wednesday, May 31, 2006 7:47 PM Reply | Quote Moderator 0 Sign in to vote I actually fix this specific issue by editing the header - now I know that sounds scary but the edit I make won't change the original meaning of the header file. Line 93 in servprov.h is: typedef /* [unique] */ IServiceProvider *LPSERVICEPROVIDER;

I change this to: #ifdef __cplusplustypedef /* [unique] */ ::IServiceProvider *LPSERVICEPROVIDER;#elsetypedef /* [unique] */ IServiceProvider *LPSERVICEPROVIDER;#endif

I wrap the cha

Forum Visual C++ & C++ Programming Managed C++ and C++/CLI 'IServiceProvider' : ambiguous symbol If this is your first visit, http://forums.codeguru.com/showthread.php?343197-IServiceProvider-ambiguous-symbol be sure to check out the FAQ by clicking the link above. https://www.experts-exchange.com/questions/22938643/error-C2872-'IServiceProvider'-ambiguous-symbol.html You may have to register or Login before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 1 of 1 Thread: 'IServiceProvider' : ambiguous symbol Tweet Thread Tools ambiguous symbol Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode May 31st, 2005,01:14 PM #1 sameer_ib View Profile View Forum Posts Junior Member Join Date May 2005 Posts 1 'IServiceProvider' : ambiguous symbol i have this problem: c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\ServProv.h(48) : warning C4935: assembly access specifier iserviceprovider ambiguous symbol modified from 'public' c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\ServProv.h(93) : error C2872: 'IServiceProvider' : ambiguous symbol could be 'c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\ServProv.h(48) : System::IServiceProvider IServiceProvider' or 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\vcclr.h(15) : System::IServiceProvider' c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\ServProv.h(100) : fatal error C1903: unable to recover from previous error(s); stopping compilation what can be the problem?? :S Reply With Quote Quick Navigation Managed C++ and C++/CLI Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums Visual C++ & C++ Programming Visual C++ Programming Visual C++ FAQs C++ (Non Visual C++ Issues) C++ and WinAPI Managed C++ and C++/CLI Visual C++ Bugs & Fixes Graphics Programming Multithreading Network Programming Driver Development C# Programming C-Sharp Programming Visual Basic Programming Visual Basic 6.0 Programming Visual Basic .NET VBForums Windows 8 and Later Store Development Modern Windows Apps (Metro) Other .NET Programming ASP.NET .NET Framework .NET Installation and Configuration Issues ADO.NET Windows Presentation Foundation (WPF) & XAML forum Java Programming Java Programming Other Programming AJAX Scripting - Client Side Database Crystal Reports XML W

for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > error C2872: 'IServiceProvider' : ambiguous symbol Want to Advertise Here? Solved error C2872: 'IServiceProvider' : ambiguous symbol Posted on 2007-11-05 C++ 3 Verified Solutions 5 Comments 2,089 Views Last Modified: 2008-01-09 I am getting: error C2872: 'IServiceProvider' : ambiguous symbol When I try to link my Managed C++ to a Static Lib. I believe this error is due to: unmanaged IServiceProvider conflicts with the System::IServiceProvider. So I exclude: mscorlib I also remove namespaces from my Managed C++ app. But still I get this error, anyone got any ideas? Cheers 0 Question by:directxBOB Facebook Twitter LinkedIn Google LVL 39 Best Solution byitsmeandnobodyelse >>>> When I try to link my Managed C++ to a Static Lib ??? You can't 'link' managed code to unmanaged code. Compiled managed code gives intermediate code which is asubject of the just-in-time compiler Go to Solution 5 Comments LVL 39 Overall: Level 39 C++ 35 Message Accepted Solution by:itsmeandnobodyelse2007-11-05 >>>> When I try to link my Managed C++ to a Static Lib ??? You can't 'link' managed code to unmanaged code. Compiled managed code gives intermediate code which is asubject of the just-in-time compiler while a static lib has compiled object code. The only way to combine managed code to unmanaged code is to use the Marshal wrappers within managed code, that means you can call unmanaged code from managed code via marshaling but not vice versa. Regards, Alex 0 LVL 39 Overall: Level 39 C++ 32 Message Active 1 day ago Assisted Solution by:evilrix2007-11-05 If you can rebuild the static lib as a DLL you can use P/Invo

 

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