byte array parameter in visual c++

Question

i am new to visual c++.. I had a method in .h file something like this:

  public:
   void DoSomething();

Here i need to pass byte array as parameter and i need to implement it in .cpp file.. I am working on windows phone 8 for this i need to include visual c++ project of windows phone run time component. I need to use this method in c# class and pass the byte array from there. But i dont know how to declare a byte array method in c++. can any one please help me to find the solution.

user530189 · Accepted Answer · 2013-02-12 00:01:22Z

3

In C++/CX, what you're using for a Runtime Component, the signature would look like this (assuming you have a ref class):

void DoSomething(const Platform::Array<uint8>^ something);

This could be called from C# directly by passing in a byte[].

answered Feb 12, 2013 at 0:01

user530189

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2 Comments

Swetha Bindu Over a year ago

hi, it worked fine when i am calling from c# thank you. i want to call "Method1"(for example) method in "C" whose parameter should be byte array.I want to call this method from C++. how to pass the "something" parameter to method in C.

user530189 Over a year ago

You should be able to use the Data and Length properties on Array to pass the contents along to some C code.

Marc-Emmanuel Ramage · Accepted Answer · 2013-02-11 17:02:17Z

0

public:
   void DoSomething(Byte *);

Or

public:
   void DoSomething(unsigned char *);

for exemple.

answered Feb 11, 2013 at 17:02

Marc-Emmanuel Ramage

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6 Comments

Swetha Bindu Over a year ago

thank you for ur answer.it gives only single byte as out paramter. but i need here byte array with ref.

Marc-Emmanuel Ramage Over a year ago

I'm not sure to understand what you need. i can say that if you want a reference instead just replace * by & like this : DoSomething(unsigned char &);.

Swetha Bindu Over a year ago

i would like to use this dosomething method in c# and pass byte array to it.. but when i am accessing this method in c# class it is excepting byte as out parameter but i want it to be byte array as in paramter..

Marc-Emmanuel Ramage Over a year ago

Well, and does it change something when you declare DoSomething with a reference instead of a pointer like i said in my previous answer ?

Swetha Bindu Over a year ago

no it throws an error as low level pointers does not work in the native code.

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