如何从VC ++将字符串传递给C# [英] How to pass a string to C# from VC++

问题描述

你好，

如何使用
中描述的功能从VC ++将字符串传递给C# 代码项目 [

Hello,

How do I pass a string to C# from VC++ using the function described in
Codeproject[^]

If I use this in VC++:

TCHAR chMyString[256];
varArgs[0].vt = VT_BYREF|VT_BSTR;
varArgs[0].bstrVal = _bstr_t(chMyString);

这在C#中:

and this in C#:

public void MyString([In, MarshalAs(UnmanagedType.BStr)] string chMyString)
{
    MessageBox.Show(chMyString); //ALWAYS EMPTY STRING
}

varArgs[0].bstrVal不传递给C#.有人能帮我吗?如果还有其他方法，请告诉我.

The varArgs[0].bstrVal is not passed to C#. Can someone help me? If there are other ways, please advise me.

推荐答案

您所引用的文章的副标题是:从不受管理的世界

你想做的是相反的！

The subtitle of the article you are referencing says: A simple way to call a managed method from the unmanaged world

What you are trying to do is the opposite!

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