pass byte array to between csharp and c++

Question

Below is my c++ class, a wrapper to send buffer

void TestSocket::Send(BYTE *mybuf)
{
    ...

    localBuffer = mybuf;

   DoSend(localBuffer);

  ...

}

In csharp code as follows.

    byte[] content = new byte[1024];
    mySocket.Send(content );

But it canot work. what's my wrong?

Help needed.

Answer 1

Hi,

Your error is caused by incorrect method signature.

Please re-define Send method in TestSocket class as follows.

void TestSocket::Send(array<unsigned char>^ buff)

Then you can define byte array in C# and pass it to C++ WinRT.

For unsigned char in C++, equivalent data type in C# is byte. The underlying WinRT data type is Byte.

Please refer to Windows Runtime base data types to learn data type mapping.

---

Best wishes,

---

Robin [MSFT]
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Answer 2

hi

  it canot work.error:too few arguments for class template "std::array"