'System'：具有此名称的命名空间不存在 [英] 'System' : a namespace with this name does not exist

问题描述

我有一个C ++项目，运行完美。现在我将项目复制到另一个文件夹，并将项目添加到WPF应用程序解决方案。

现在C ++项目给我很多构建错误。其中之一是System'：此名称的命名空间不存在。

以下是创建此错误的行。

  #include stdafx.h
 
使用命名空间System; 
 using namespace System :: Reflection; 
 using namespace System :: Runtime :: CompilerServices; 
 using namespace System :: Runtime :: InteropServices; 
 using namespace System :: Security :: Permissions; 
  

上述行在 AssemblyInfo.cpp 文件中。我没有任何C ++的经验，所以发现它很难删除错误。任何帮助是赞赏。以下是另一个可能有助于您解决问题的错误。

 受管理的目标代码需要'/ clr'选项$提前感谢。
 
     
将公共语言运行时支持设置为项目属性中 2 个位置中的公共语言运行时支持（/ clr）：
 
 
 
配置属性 - >常规
 
 
 
配置属性 - > C / C ++  - >常规
 
I had a C++ project which was running perfectly. Now I copied the project to another folder and added the project to a WPF application solution. 

Now the C++ project is giving me lot of build errors. One of them is "System' : a namespace with this name does not exist". 

Below are the lines which creates this error.
#include "stdafx.h"

using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::CompilerServices;
using namespace System::Runtime::InteropServices;
using namespace System::Security::Permissions;
The above lines are in AssemblyInfo.cpp file. I don't have any experience of C++, so finding it difficult to remove the errors. Any help is appreciated. Below is another error which might be helpful for you to resolve the issue.
managed targeted code requires a '/clr' option
Thanks in advance.
解决方案
Set Common Language RunTime Support to be "Common Language RunTime Support (/clr)" in 2 places in your project properties :

Configuration Properties -> General

Configuration Properties -> C/C++ -> General

                        
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