I'm trying to use the StartXpsPrintJob1 API in C#.
However, I couldn't find any information about it using Google. This method is not listed on pinvoke.net.
Seems I have to translate the C++ code, including classes and interfaces, into C# and use some kind of dllimport? Unfortunately, I have zero knowledge about C++.
How can I acheive this?
Seems I have to translate the C++ code, including classes and interfaces, into C# and use some kind of dllimport?
You can save time and effort and use a tool named SWIG, (Sourceforge project page) to generate c# code that generate dllimport.
How to use:
Download SWig for windows
Create c++ header file that represent StartXpsPrintJob1 , name the file xpsheader.h
create interface file e.g example.i
%module example
%{
/* Includes the header in the wrapper code */
#include "xpsheader.h"
%}
/* Parse the header file to generate wrappers */
%include "xpsheader.h"
Run the command:
swig -csharp example.i
The tool generate punch of files with one file named examplePINVOKE.cs
In fact, it is important to know that SWIG is a fairly complete C++ compiler with support for nearly every language feature. This includes preprocessing, pointers, classes, inheritance, and even C++ templates. SWIG can also be used to package structures and classes into proxy classes in the c# target language---exposing the underlying functionality in a very natural manner.
The error "invalid assembly" is would probably occur if you tried to import XpsPrint.dll into your project as a .Net library: it's actually a "native code" library :(
In theory, you should be able to copy/paste this example into a new MSVS/C# project:
How to: Programmatically Print XPS Files.
You'll notice that it just "prints" - it doesn't use any XPS-specific APIs.
If that doesn't work for you, this link might also help:
Programmatically print an XPS file to a physical printer
Finally, please note in the Microsoft documentation:
https://msdn.microsoft.com/en-us/library/windows/desktop/ff686814(v=vs.85).aspx
[The XPS Print API is not supported and may be altered or unavailable
in the future. Client applications should use the Print Document
Package API instead.]
Related
In my application, I have provision to run Python scripts through IronPython. In one of the requirement, the data from my C# application should be displayed in 3D using Visualization Toolkit. When I try to use VTK in a script and execute it, I get "ImportError: No module named vtk" error. I have searched for file named vtkCommonPython.pyd but cannot find it on my computer. Should Python be installed even after installing IronPython? What is the correct way to use VTK from IronPython?
In most cases, IronPython does not work with native/CPython modules like what vtkCommonPython.pyd seems to be. You will probably want to look at .NET bindings for VTK in order to use it from your IronPython scripts.
ActiViz.NET might be what you should be using. Wiki/Documentation, Download
Other modules containing only pure python should typically work fine. It's 'just' the native extensions that do not work as there is no easy (and built-in) way to make native code callable from .NET/IronPython using the same conventions as in CPython.
For additional info see the FAQ ('Compatibility') and the issue tracker.
You might also want to keep an eye on the recent effort to revive and port ironclad to IronPython 2.7. This project aims to provide the marshalling layer required to invoke CPython modules.
I need to create a .lib file from a C# DLL (I think it is C# becuase of this code which calls to the dll https://code.google.com/p/thunder-missile-api/downloads/detail?name=MissileLauncher.cs&can=2&q=) In other word's I need to create a .lib for DreamCheeky Thunder Missile Launcher DLL, which comes with their software .
Now, what I need to do? I need to operate this device using C++. Easiest way is using their own DLL. The above linked code does it in C#.
I tried importing the DLL file into the project C++, but it seems like some methods are missing, specially methods like moveMissileLauncher() which are called in the C# code.
And the best thing is, I might want to move to QT (most probably) so you know, having a .lib is a good idea.
Crating a lib from a managed dll will do no good. You need to use interop
http://msdn.microsoft.com/en-us/library/ms973872.aspx
In your specific case, I would write a C++ lib that exposes the methods you need/want to call and forwards them to the managed C# dll using interop
I would do that in C++/CLI, personally.
A good, more recent article on the options you have is here http://msdn.microsoft.com/en-us/magazine/dd315414.aspx, or look here on SO for COM/.NET interop and you will find plenty of answers.
You want to call managed C# code from your c++ application. Here is tutorial to make someway to call c# code from your c++ application, i have used this method before, and works fine for me.
I've got a problem which I hope you can help me with.
I created ASP.NET 4.0 web application. I've also got .cpp file generated in some other app. This .cpp file contains functions, which always returns the same number of variables and which always takes the same number of parameters.
What I need to do is being able to use this functions in my web application.
But what is real problem is that I need to be able to replace this functions while running app. What I mean is administrator should be able to login, upload new cpp file, which will replace old functions with new ones. New ones will have the same names, parameters and result number, but will make calculations in a different way.
Is there any way this can be achieved?
Thanks for any help!
MattheW
Precompile the cpp code into dlls and let admin upload dll. Reference dll's from c# app using [DllImport("")] directive.
C++ will need to be compiled in some way or another. You can use a compiled dll written in C++ in your ASP.NET application but the code will still need to be compiled for ASP to be able to use it.
The compiled DLL can then be loaded and unloaded to accommodate changes to the function. You could perhaps even make the ASP.NET server compile the file somehow, but the code still needs to be compileable to a DLL to make it executable.
You need to expose the C++ code via another dll.
The first choice is pinvoke. See:
How to set up a C++ function so that it can be used by p/invoke?
It's also covered here:
http://msdn.microsoft.com/en-us/library/aa446538.aspx
Technically you could also expose via COM or write in managed C++ but those are both overkill if you're just trying to expose a few C++ functions.
is this possible to view contents and Functions of a DLL file...
few times ago i was playing with OlyDBG then i found there is option for viewing contents of dll...
so suggest me any good tool or soft for this...
and suppose i have a DLL named "Python27.dll"...
now i need to view the content of this DLL so what do i do...
thanx...
While not trivial to use (you need to understand the format of a Portable Executable, aka PE, file), pefile seems a good, powerful and versatile tool for the purpose of viewing a DLL or any other PE file (I wouldn't risk using it to change such a file, although I see it's one of its features).
For example, excerpting the module's usage examples (and editing to show a dll instead of the equally hypothetical filename they use, which is an exe;-):
import pefile
pe = pefile.PE(‘/path/to/pefile.dll’)
for exp in pe.DIRECTORY_ENTRY_EXPORT.symbols:
print hex(pe.OPTIONAL_HEADER.ImageBase + exp.address), exp.name, exp.ordinal
should, according to the wikipage I pointed to, display something like:
0x7ca0ab4f SHUpdateRecycleBinIcon 336
0x7cab44c0 SHValidateUNC 173
0x7ca7b0aa SheChangeDirA 337
0x7ca7b665 SheChangeDirExA 338
0x7ca7b3e1 SheChangeDirExW 339
0x7ca7aec6 SheChangeDirW 340
0x7ca8baae SheConvertPathW 341
Dependency Walker may provide what you want/need -- it certainly shows all the entry points in a DLL.
On Windows, DUMPBIN provides some DLL inspection capabilities. For example:
DUMPBIN /EXPORTS C:\path\to\my.dll
will display all the exported definitions.
I've done some work with ctypes, and loading dlls in windows, but I don't think DLL have any sort of introspection. This really isn't a big deal, because all of the function calls in DLLs are static. If your trying to use a undocumented DLL, you would not only need to know the names of the functions, but also the parameters of the functions. You would have to reverse engineer the DLL, no small task.
So, in my opinion, I would say no.
How can I use the ListView_GetBkImage macro:
http://msdn.microsoft.com/en-us/library/bb761246(v=VS.85).aspx
... from a C#/WinForms application? I think this macro just wraps the SendMessage method, but I'm not sure. I couldn't find any C#-based samples on this.
Basically I'm trying to get a LVBKIMAGE ( http://msdn.microsoft.com/en-us/library/bb774742(v=VS.85).aspx ) structure that references the Desktop's background bitmap.
You cannot. A macro is processed at compile time by the C/C++ compiler, but you want to access the binary library. You will just have to find the macro in the source, see what it does and do the same in your C# code. It shouldn't be anything too complex. Download the Platform SDK if you don't already have it and look in the .h file mentioned in the documentation.
Edit: OK, so the macro is defined as:
#define ListView_GetBkImage(hwnd, plvbki) \
(BOOL)SNDMSG((hwnd), LVM_GETBKIMAGE, 0, (LPARAM)(plvbki))
SNDMSG is simply defined as SendMessage. LVM_GETBKIMAGE is an integer - it's 0x1045 for the ASCII version and 0x108B for the Unicode version. (You probably want the Unicode version if you're unsure.) So the entire thing resolves to:
(BOOL)SendMessage(hwnd, 0x108B, 0, plvbki)
There should be easy enough to map to C#. Look in System.Windows.Forms using Reflector to see how Microsoft have imported the SendMessage function. It will be marked internal, so you cannot call it, but you can copy it. plvbki is a pointer to a struct - you'll need to create a C# equivalent of LVBKIMAGE. Actually, MS have probably done that for you too, so look around for that.