I am trying to implement this basic example https://docs.aspose.com/pdf/cpp/hello-world-example/ but I am getting errors that MakeObject, Document and TextFragment are not defined.
I was developing on vscode but then I realized that aspose can be downloaded through nuget in vs so I switched to vs thinking that adding aspose will be automatically integrated in my project dependencies or something, but no it didn't and I don't know currently how to include it (my use case is also very basic I tried hummuspdf/PDF-Writer but also I didn't knew how to implement it or include it, maybe it isn't as simple as #include "file.h" ? )
#include "Aspose.PDF.Cpp/Document.h"
#include "Aspose.PDF.Cpp/SaveFormat.h"
using namespace Aspose::Pdf;
using namespace System;
int main()
{
auto doc = MakeObject<Document>(u"Example.pdf");
doc->Save(u"Example.docx", SaveFormat::DocX);
}
Related
I coded in C++ on Visual Studio (Windows 10) and got this error:
#error The <experimental/filesystem> header providing std::experimental::filesystem is deprecated by Microsoft \
and will be REMOVED. It is superseded by the C++17 <filesystem> header providing std::filesystem. \
You can define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING to acknowledge that you have received this warning.
With this headers:
#include <iostream>
#include <fstream>
#include <string>
#include <windows.h>
#include <filesystem>//If I will disable it nothing happens.
#include <experimental/filesystem> //If I will disable it happens another error.
namespace fs = std::experimental::filesystem;
using namespace std;
I've tried: #define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING in the main cpp file. It didnt help.
So then I paste this code from here:
#ifdef __cpp_lib_filesystem
#include <filesystem>
using fs = std::filesystem;
#elif __cpp_lib_experimental_filesystem
#include <experimental/filesystem>
using fs = std::experimental::filesystem;
#else
#error "no filesystem support ='("
#endif
Didn't helped too.
What is the easiest way to get out that error?
Add _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING to Preprocessor definitions.
Project -> Properties -> C/C++ -> Preprocessor -> Preprocessor Definitions.
This solved the issue for me.
According to the link
C++17’s is supported. This is a completely new
implementation, incompatible with the previous std::experimental
version, necessitated by symlink support, bug fixes, and changes in
standard-required behavior. Currently, including provides
the new std::filesystem and the previous
std::experimental::filesystem, and including
provides only the old experimental implementation. The experimental
implementation will be REMOVED in the next ABI-breaking release of the
libraries.
MS abandoned 'experimental' in filesystem.
You could try to use #include <filesystem>instead of #include <experimental/filesystem> and the std::experimental::filesystem is slated for removal, this means you should use std::filesystem.
I had the same problem and then, when I removed the experimental filesystem and added:
#include <filesystem>
namespace fs = std::filesystem;
I would get the error:
namespace “std” has no member “filesystem”
The solution was to go to project properties and do as instructed in the link.
VS2017: E0135 namespace "std" has no member "filesystem"
Adding the define where necessary worked for me:
#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING 1;
ie.
#ifdef __cpp_lib_filesystem
#include <filesystem>
namespace fs = std::filesystem;
#elif __cpp_lib_experimental_filesystem
#define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING 1;
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
#else
#error "no filesystem support ='("
#endif
I've been researching this same problem for weeks, and I'm using visual studio 2019 on an Unreal Engine 4 project. It's difficult to enable c++17 headers in visual studio and make them work. A lot of people online suggests using the boost library instead, but this is my attempt in using filesystem because I don't want to deal with trying to download / import external libraries, and so here's what I know...
** Before you start coding in visual studio, you should build / compile your project and see if Visual Studios needs anything set up; for me, I had to download / setup a free license with Incredibuild (there are tutorials online if someone needs to get this setup). Incredibuild is helpful and necessary to build projects in Visual Studio (at least if you're using Unreal Engine 4), but sometimes I get 1 or 2 "errors" in visual studio, but will compile in Unreal Engine 4 because those errors aren't actually errors (people say online that Incredibuild is weird, and wanted to mention that)**
1) How to enable c++17 Headers
When trying to #include which is a c++ version 17 header, it's necessary to enable c++17: Look inside the visual studio "solution explorer" to view the project files, and right-click the project itself and open "properties". Go to the "C/C++ language" tab and switch the version to c++17 (this is easy to find this online). Unless you're doing an Unreal Engine project because there is not a "C/C++ language" tab, so instead find the "NMake" tab and in the text-box to the right of "Addition Options" type in:
/std:c++17 OR /std:c++latest (Microsoft has a list I found online of others, but these are fine)
and visual studios will recognize as a header.
2) How NOT to get c++17 namespaces to work (things I've tried)
After the headers start working you can try to finally make a namespace variable:
namespace fs = std::filesystem; => ERROR: 'std does not have a namespace or class filesystem'
OR if you also #include you can try:
namespace fs = std::experimental::filesystem; OR namespace fs = std::experimental::filesystem::v1; => ERROR: 'we want you to define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING'
how does one fix these errors?
Online, I found that adding these lines of code to your ProjectName.Build.cs file (which can be found and edited after clicking on the file in "solution explorer") instead of the original declaration for PCHUsage:
PCHUsage = PCHUsageMode.NoSharedPCHs; PrivatePCHHeaderFile = "Folder.h"; CppStandard = CppStandardVersion.Cpp17;
this did get rid of the Errors when using std::filesystem BUT caused wayyyy more problems, and seemed harmful. After looking through other websites / possible solutions, it seems people online don't know how to actually use the filesystem library in visual studio, I've been looking for working code for weeks.
if you want to try and use the std::experimental::filesystem or std::experimental::filesystem::v1, I tried #define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING, but no dice.
I'm in the same boat as you man, and it looks like you didn't get much help from the previous comments. If we can't find a solution / video tutorial online, I have a plan B. Maybe we could try and write a c++17 project using some different software, or maybe we could write a program using a different software that could be launched instead of enabling c++17 into Visual Studio; for example, if you wanted to list the files in a directory, make an executable file in your preferred other software, and launch that executable / feed it arguments from your visual studio project. That's the best I got man. I hope that sparks some creativity or whatever, but I think it's a lot more helpful than what I've seen online. Good luck to you! and I need that luck too
CodeLite 7.0, Windows 7, MinGW installed, autocomplete cannot find anything c++ related. I have a workspace and a project in it (just started with CodeLite).
When I try to include a c++ header (e.g. string or vector) or use those classes in my code i get no autocomplete. Compiling and running works fine, just the autocomplete does not.
Under CodeLite->Settings->Code Completion->CTags there is a list of MinGW's include folders for c++ (I checked, all headers are in those folders).
Am I missing something?
What happens when you go to :
CodeLite -> Workspace -> Retag Workspace (full) , does it change anything?
And just to make sure: you do have a workspace and project, right?
Eran
I may be way off base here, but found a similar (same?) issue.
This does NOT work:
#include <vector>
using std::vector;
vec (No autocomplete)
However, both other ways work as expected:
#include <vector>
std::vec (Yes autocomplete)
OR:
#include <vector>
using namespace std;
vec (Yes autocomplete)
I'm trying to embed scene created with Visualization ToolKit (VTK)library into VisualC++ 2012 created windows form so I can design my Windows native GUI interface.
I'd like to underline that, all examples with console app are configured with (Cmake), compiled with VC++2012 and works flawlessly, as instructed by the official VTK wiki page.
The issue is, if I try to call those VTK functions and class initializations inside of Win Form application I get the Error LNK1107: invalid or corrupt file: cannot read at 0x2E0 D:\.....\VTK_61_BUILD_VS2012\bin\Debug\vtkViewsCore-6.1.dll even if I add everything normally as expected, include headers and external library dependencies.
This makes me think that I'm originating from wrong Visual C++ 2012 project template or something obvious that I'm completely missing, otherwise compiler would arise many not found files or syntax error.
This is the first lines where I'm trying to invoke the VTK library, even the intellisense suggest the vtk..... named proc,functions and structures, but application fails to compile.
#pragma once
#include <vtkSmartPointer.h>
#include <vtkTriangle.h>
#include <vtkCellArray.h>
#include <vtkPolyData.h>
#include <vtkRenderWindow.h>
namespace CLR_Project1 {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
...
...
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
What is the problem here ?
The following link (in particular the answer of Mr. bnsteel) helped me very much, when I had the same problem ==>
http://vtk.1045678.n5.nabble.com/VTK-and-Winforms-integration-td5721086.html
You can use Swig as it is suggested under the link. But it is not necessary. Using the similar way (passing the windows form panel handle) you can create a C++/CLI wrapper as jalal sadeghi proposed. You will pass the panel handle through the wrapper to your C++ library that does all the "VTK work". This way you don't have to create individual wrappers for all VTK classes, all the "VTK work" and dependencies on VTK stay hidden in your C++ layer.
Something like this ==>
C++ side
setImageRenderWindowParentID(void *theID){
... (init your vtk render window)
renWin->SetParentId(theID);
}
C++/CLI side
void setRenderWindowParentID(IntPtr parentID, .. also pass the panel size .. ){
void* p = parentID.ToPointer();
myCPPVTK->setRenderWindowParentID(p, .. also pass the panel size ..);
}
C# side
VTKWrapper.setRenderWindowParentID(m_panel.Handle, .. also pass the panel size ..);
I tried to connect to Oracle using C++ but it is giving me error stating that DBManger.h not found. I have also tried using occi.h but got the same error of not found or No Such Directory.
I have installed Oracle 11g and it contains the OCI Liabraries also.
I located the specififc folders also where the OCI libraries are present . In my system they are at location E:\app\user\product\11.1.0\db_1\OCI\lib\MSVC\vc8.
I have also set the Path starting with Oracle home. But, still my program is not able to find the header files.
Any help would be greatly appreciated? I Googled a lot but found the same solution stating that locate the folder where the OCI libraries are available. I am posting my code below written in Visual Studio 2008:
I have written a very small script and just included the header files. Not even done the connectivity:
#include <occi.h>
#include <iostream>
using namespace oracle::occi;
using namespace std;
class DataBaseConnectionTest
{
public:
void test()
{
cout<<"Hello from test"<<'\n';
}
};
void main()
{
DataBaseConnectionTest *dbc=new DataBaseConnectionTest();
dbc->test();
}
Modify your project properties, add the E:\app...vc8 directory name to the Addition include directories. It's under C++/General. No need to double every \ in that one.
You'll probably need a similar treatment for the OCI library file anyway. The include file is only half the puzzle, the other half is the LIB.
You could consider OTL as alternative to OCI. Then your code could be more portable. I used it many years ago, interfacing SqlServer, and was surprised by the clean design and the raw speed (way faster than MFC+ODBC...). Also, I had a problem and Sergei gave me immediate assistance.
Can someone tell me if there is a library built in C++ that I can use to get a list of files and directories? I've looked around and I see people using dirent.h but I need to download it(i think).
Thanks
P.S. I've looked at the fstream, but thats only for reading and outputting files as far as i know.
FORGOT TO MENTION. I DO NOT WANT TO DOWNLOAD ANYTHING, I JUST WANT TO SEE IF THERE IS A LIBRARY THAT IS BUILT WITHIN C++ THAT I CAN USE STRAIGHT OFF THE BAT. THIS IS FOR WINDOWS ASWELL
How about Boost::Filesystem? Supports directory iteration and is portable.
You can use Boost Filesystem library.
http://www.boost.org/doc/libs/1_31_0/libs/filesystem/doc/index.htm
Some nice samples are also provided at the link.
EDIT:
Without downloading a 3rd party library, there is no portable way to do it. For windows you can use CFileFind class from MFC.
Using namespace std::filesystem is available in visual studio 2017 you have in #include
#include <iostream>
#include <iostream>
#include <fstream>
#include <filesystem>
#include <chrono>
#include <thread>
#include <functional>
namespace fs = std::filesystem;
void Files_in_Directory();
fs::path path_Copy_Directory = "E:\Folder";
fs::path path_Paste_Directory = "E:\Folder1";
int main()
{
Files_in_Directory()
return 0;
}
void Files_in_Directory()
{
for (const auto & entry : fs::directory_iterator(path_Copy_Directory))
{
std::cout << entry.path() << std::endl;
}
}
Since others already mentioned boost::filesystem there are also other alternatives. Almost every C++ framework has some way to list directories and files. Like wxWidgets or poco and there are many more.
Regarding dirent.h. It is a standard C Posix library so on Posix compatible systems it should be available. For Windows you can also get it here and it includes instructions on how to use it.
After your edit:
On Windows you can use things like FindFirstFile (example here) and then you don't have to download anything. But it only works on Windows. It is not build in C++.