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c#asp.netc++dllunmanaged
Mendokusai
Mendokusai

Reputation: 1353

How do I call unmanaged C/C++ code from a C# ASP.NET webpage

I have an ASP.NET website that uses C# and I'd like to call functions from an unmanaged C/C++ DLL. How do I do it?

Upvotes: 6

Views: 6921

Answers (3)

J.W.
J.W.

Reputation: 18181

Check out P/Invoke.

Calling Win32 DLLs in C# with P/Invoke

If it's a COM dll, then you can use COM Interop

Upvotes: 5

kenny
kenny

Reputation: 22404

Just adding that pinvoke.net is a great wiki/resource for your Win32 needs.

Upvotes: 0

Vinay
Vinay

Reputation: 4793

  1. create an unmanaged dll:

    extern "C" __declspec(dllexport) __cdecl int sum(int a,int b); ---->

  2. create a namespace/class to DllImport the above DLL

    using System.Runtime.InteropServices;
namespace ImportDLL
{
public class importdll
{
public importdll()
{
}

DllImport("mysum.dll",
          EntryPoint="sum",
          ExactSpelling=false,
          CallingConvention = CallingConvention.Cdecl)]
public extern int myfun(int a, int b);
}
}

  3. create a aspx code behind

    using ImportDLL;
namespace TEST
{
 public int my_result;
 protected importdll imp = new importdll();
 my_result = imp.myfun(1,1);
}

Upvotes: 10

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