我如何获得地图< sting，int>从C ++到C＃ [英] How I can get map<sting, int> from C++ to C#

问题描述

我想从dll获取地图c ++



C ++代码

I am trying to get map from dll c++

C++ code

extern "C" __declspec(dllexport) map<string, int> createMap(string &fileName) {
	ifstream infile(fileName);
	vector<string> bitsLine;
	bool headerEnded = false;
	string line;
	int i = 0;
	int length = 0;

	while (getline(infile, line)) {
		if (headerEnded) {
			bitsLine = split(line, ',');
			signalsMap.insert({ bitsLine.at(0), length });
		}
		else {
			if (line.find("HEADER_END") != std::string::npos) {
				headerEnded = true;
			}
		}
		length = infile.tellg();
		i++;
	}
	return signalsMap;
}

我的尝试：



C＃代码

What I have tried:

C# code

Dictionary<string, int>  x =  createMap("C:/users/asalah/source/repos/WindowsFormsApp3/WindowsFormsApp3/RR_Test2_3.csv");

推荐答案

你最好的选择是使用 C ++ / CLI （并且可能直接填充字典，而不使用 std :: map 。例如，请参阅 c ++ - Cpp / Cli将std :: map转换为.net字典 - Stack Overflow [ ^ ]。

Your best bet is using C++/CLI (and possibly directly fill the Dictionary, without using the std::map at all). See, for instance c++ - Cpp/Cli Convert std::map to .net dictionary - Stack Overflow[^].

您好，

我认为您基本上需要做的是使用STL / CLR将您的原生c ++容器映射到.Net包含。您可以在以下链接中找到一个很好的示例和有用的信息：



如何：从STL / CLR容器转换为.NET集合Microsoft Docs [ ^ ]



请注意：

适配器（STL / CLR）| Microsoft Docs [ ^ ]



如果它不起作用，请不要犹豫，然后我会尝试改进我的解决方案。



干杯，

AH

Hi,
I think basically what you need to do is to use STL/CLR to map your native c++ container into .Net contains. You can find a good example and useful information at the below link:

How to: Convert from a STL/CLR Container to a .NET Collection | Microsoft Docs[^]

For your attention:
adapter (STL/CLR) | Microsoft Docs[^]

Please do not hesitate to leave a comment if it didn`t work then I will try to improve my solution.

Cheers,
AH

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