.NET, Call C++ functions from C# -

-

I have a solution, in which there is a C ++ project and C # project I C ++ project defines a class , Which I want to instantiate in C # and it is called member function. So far, what I have been able to do is to modify the class: 

  CFoo Bar = new CFoo ();

But when I try to call the function on it, the compiler says, it is not available.

Also, when I inspect the object in the debugger, not

Need to declare a ref class in C ++ / CLI.

(Note that we are talking about C ++ / CLI, not C ++. I think that you have to convert CLR to your C ++ project or new CFoo < / Code> will not be able to work.)

Edit:

You can not copy riff to all your old sections There is no need to convert to classes.

Assume that you have some older C ++: 

  class FooUnmanaged {int x; FooUnmanaged (): x (5) {}};

Then you try to wrap it in CLR class: 

  Roofe class FooManaged {FooUnmanaged m; };

As you have seen, you get an error saying that this permission is not allowed. But try this: 

  Ruff Class FooManaged {FooUnmanaged * m; };

It is absolutely fine that the compiler does not want to allocate the frequency of the object embedded within an object on the managed pile, but it is very happy with a pointer, which in turn results in IL in the System InitPtr turns it into . .

This means that you have to make a decision about calling delete . The most likely solution is: 

  Ref Class FooManaged {FooUnmanaged * u; Public: FooManaged (FooUnmanaged * u_): u (u_) {} ~ FooManaged () {Delete U; }};

As soon as it is in another C ++ class. It is possible that C ++ / CLI will be able to automatically automate this prediction into a future version automatically.

Note that the resulting IL is that is FUNJENZED class now applies IDisposable , and the Destructor DISASE The method has been changed. This allows the .NET client to properly assign it, e.g. (CD) will use C # 

  (var m = newfounder ()) {// end of block will be settled (and hence the FUU management will be removed)}

Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more