非托管的DllImport，非.NET的DLL .NET项目代表的char *虚空__stdcall [英] DllImport Unmanaged, Non .NET Dll to .NET Project Representing Char * and Void __StdCall

问题描述

我已经写在Borland的C ++，我需要导入一个DLL非.net和非托管。它返回void，并且对功能标识__stdcall。它还需要的char *的传递。当我尝试它作为引用添加到我的项目在VS 2005，它返回无效组装的误差。

如何在C＃中做到这一点。

这是我目前已经和它不工作：<？ / p>

 函数[DllImport（Project1.dll，CallingConvention = CallingConvention.StdCall）] 
公共静态外部的IntPtr CustomerForm 
（字符串标题）; 
  

解决方案

有关非托管的DLL没有将其添加为参考。确保二进制DLL位于同一文件夹中的.NET EXE项目位于通常（项目）\bin\debug构建。

此外， 。请确保您有用于出口.def文件，当你建立与Borland C ++非托管的DLL

编辑：

 
 LIBRARY PROJECT1 
出口量
 CustomerForm 
 

而在你的Borland C ++源确保该函数声明为导出中的示例：

 
的#ifdef __cplusplus 
 __declspec（dllexport）的无效​​CustomerForm（字符* S）; 
的#endif 
 

使用，这将确保该功能是导出且可连接<！/ P>

请确保您的DllImport属性的签名多达匹配你的本地C ++的Dll即

 
函数[DllImport的签名（Project1.dll，CallingConvention = CallingConvention.StdCall）] 
公共静态外部无效CustomerForm（字符串标题）; 
 

希望这可以帮助，
最好的问候，
汤姆。

I have a DLL non .net and unmanaged written in Borland C++ that I need to import. It returns void and has the identifier __stdcall on the function. It also requires passing of char *. When I try to add it as a reference to my project in VS 2005, it returns an error of not valid assembly.

How can I do this in C#?

This what I currently have and it does not work:

[DllImport ("Project1.dll", CallingConvention=CallingConvention.StdCall)]
    public static extern IntPtr CustomerForm
        (String caption);

解决方案

For an unmanaged DLL you do not add it as a reference. Make sure the binary DLL is located in the same folder as the build where the .NET EXE project resides in usually {project}\bin\debug.

Also, make sure that you had a .DEF file for the exports when you built the unmanaged DLL with Borland C++.

Edit:

LIBRARY Project1
EXPORTS
    CustomerForm

And in your Borland C++ source make sure that the function is declared as export, for an example:

#ifdef __cplusplus
__declspec(dllexport) void CustomerForm(char *s);
#endif

Using this will ensure that the function is exportable and can be linked!

Make sure the signature of your DllImport attribute matches up to the signature of your native C++ Dll i.e.

[DllImport ("Project1.dll", CallingConvention=CallingConvention.StdCall)]
    public static extern void CustomerForm(string caption);

Hope this helps, Best regards, Tom.

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