IAsyncOperation BitmapImage ^ C ++ [英] IAsyncOperation BitmapImage ^ C++

问题描述

我试图在c＃windows store app项目中创建一个C ++ Runtime组件;



我创建了一个新项目C ++ - > Windows应用商店应用 - > Windows运行时组件。

新项目有默认的class1。

这就是我想要做的：



Class1.h：

  public   ref   class  Class1  sealed  
 {
  public ：
 Class1（）; 
 Windows :: Foundation :: IAsyncOperation< Windows :: UI :: Xaml :: Media :: Imaging :: BitmapImage ^> ^ StreamToBitmap（Windows :: Storage :: Streams :: IRandomAccessStream ^ fileStream）; 
 
}; 
} 

Class1.cpp：

 Class1 :: Class1（）
 {
} 
 
 IAsyncOperation< BitmapImage ^> ^ StreamToBitmap（IRandomAccessStream ^ fileStream ）
 {
  return  create_async（[=]（）
 {
  auto  bitmapImage =  ref   new  BitmapImage（）; 
 bitmapImage-> SetSource（fileStream）; 
  return  bitmapImage; 
 
}）; 
 
} 

错误：

错误2错误LNK2019：未解析的外部符号public：virtual struct Windows :: Foundation :: IAsyncOperation< class Windows :: UI :: Xaml :: Media :: Imaging :: BitmapImage ^> ^ __cdecl TestRuntimeC__toCS :: Class1 :: [TestRuntimeC__toCS :: __ IClass1PublicNonVirtuals] :: LoadImage（struct Windows :: Storage :: Streams :: IRandomAccessStream ^）（？LoadImage @？Q__IClass1PublicNonVirtuals @ TestRuntimeC__toCS @@ Class1 @ 2 @ U $ AAAP $ AAU ？$ IAsyncOperation @ P $ AAVBitmapImage @ Imaging @ Media @ Xaml @ UI @Windows @@@ @@ @ P @ AAUIRandomAccessStream @ Streams @ Storage @ 6 @@ Z）在函数public：virtual long __stdcall TestRuntimeC__toCS ::中引用Class1 :: [TestRuntimeC__toCS :: __ IClass1PublicNonVirtuals] :: __ abi_TestRuntimeC__toCS ___ IClass1PublicNonVirtuals ____ abi_LoadImage（struct Windows :: Storage :: Streams :: IRandomAccessStream ^，struct Windows :: Foundation :: IAsyncOperation< class Windows :: UI :: Xaml :: Media :: Imaging： ：BitmapImage ^> ^ *）（？__ abi_TestRuntimeC__toCS ___ IClass1PublicNonVirtuals ____ abi_LoadImage @？Q__IClass1PublicNonVirtuals @ TestRuntimeC__toCS @@ Class1 @ 2 @ U $ AAGJP $ AAUIRandomAccessStream @ Streams @ Storage @Windows @@ PAP $ AAU？$ IAsyncOperation @ P $ AAVBitmapImage @ Imaging @ Media @ Xaml @ UI @ Windows @@@ Foundation @ 7 @@ Z）C：\ Users\Stamatis \Documents\Visual Studio 2013 \Projects\TestRuntimeC ++ toCS\TestRuntimeC ++ toCS\Class1.obj TestRuntimeC ++ toCS 

解决方案

AAAP

AAU？

IAsyncOperation @ p

Im trying to create a C++ Runtime compoment to use in c# windows store app project;

I Created a new project C++ -> Windows Store App -> Windows Runtime Component.
The new project has default class1.
This is what i m trying to do:

Class1.h:

public ref class Class1 sealed
	{
	public:
		Class1();
                Windows::Foundation::IAsyncOperation<Windows::UI::Xaml::Media::Imaging::BitmapImage^>^ StreamToBitmap(Windows::Storage::Streams::IRandomAccessStream^ fileStream);

	};
}

Class1.cpp:

Class1::Class1()
{
}

IAsyncOperation<BitmapImage^>^ StreamToBitmap(IRandomAccessStream^ fileStream)
{
	return create_async([=]()
	{
		auto bitmapImage = ref new BitmapImage();
		bitmapImage->SetSource(fileStream);
		return bitmapImage;

	});
		
}

Errors:

Error	2	error LNK2019: unresolved external symbol "public: virtual struct Windows::Foundation::IAsyncOperation<class Windows::UI::Xaml::Media::Imaging::BitmapImage ^> ^ __cdecl TestRuntimeC__toCS::Class1::[TestRuntimeC__toCS::__IClass1PublicNonVirtuals]::LoadImage(struct Windows::Storage::Streams::IRandomAccessStream ^)" (?LoadImage@?Q__IClass1PublicNonVirtuals@TestRuntimeC__toCS@@Class1@2@U$AAAP$AAU?$IAsyncOperation@P$AAVBitmapImage@Imaging@Media@Xaml@UI@Windows@@@Foundation@Windows@@P$AAUIRandomAccessStream@Streams@Storage@6@@Z) referenced in function "public: virtual long __stdcall TestRuntimeC__toCS::Class1::[TestRuntimeC__toCS::__IClass1PublicNonVirtuals]::__abi_TestRuntimeC__toCS___IClass1PublicNonVirtuals____abi_LoadImage(struct Windows::Storage::Streams::IRandomAccessStream ^,struct Windows::Foundation::IAsyncOperation<class Windows::UI::Xaml::Media::Imaging::BitmapImage ^> ^ *)" (?__abi_TestRuntimeC__toCS___IClass1PublicNonVirtuals____abi_LoadImage@?Q__IClass1PublicNonVirtuals@TestRuntimeC__toCS@@Class1@2@U$AAGJP$AAUIRandomAccessStream@Streams@Storage@Windows@@PAP$AAU?$IAsyncOperation@P$AAVBitmapImage@Imaging@Media@Xaml@UI@Windows@@@Foundation@7@@Z)	C:\Users\Stamatis\Documents\Visual Studio 2013\Projects\TestRuntimeC++toCS\TestRuntimeC++toCS\Class1.obj	TestRuntimeC++toCS

解决方案

AAAP

AAU?

IAsyncOperation@P

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