I'm new to MFC programming. I have to write an application that reads a config file to initilize the application. The config file format is something like:
server={192.168.1.254;8080}
device={panasonic}
printer={172.168.10.50;9100}
I want to know how to read each key and its value and then write new values back to the config file. If you can give me code example, i would greatly appreciate your kindness
Use the .ini format, MFC has support for that.
Check the documentation, look for the ".INI" entries.
Related
I am trying to make a chatbot android application. Please tell me how can I convert my .aiml file to .aiml.csv
If you want to know the process, you may go through Google's Program-AB and understand how it processes all tags. Also, it is build in Java so you can copy these classes to your application.
https://code.google.com/archive/p/program-ab/source
I am using a .mdb file as a database for a dialog based application. For the each Release I want to give a version to the mdb file if there are more entries added. using C++ i want to read the version and display it in the application.
Can you please tell me if it is possible to give a version to mdb file ?
You can add a table to MDB and track releases there. If MDB should change release number automatically after some data changes, you can use Data Macro (this is for Access 2010+)
You can create a custom property:
db.CreateProperty("VersionId", dbText, "1.0.0")
then add this to the database, but there is no way to read this without opening the database file.
There is no easy way to do that and its probably best to do it as a db.property like #Gustav proposed.
If for some reason it is important to have a version information that you can read without opening the file as access file there are still some options:
There is the Windows Shell Property System that I think allows you to add Properties to every File/Folder.
You could change the Creation Date for the file to fit your need.
You could perhaps even read/change the file content itself in a binary stream if you research it thouroughly enough.
and you can of course have an external .txt (or .ver or whatever) file that you update automatically from the db.property whenever you open the db.
I am creating a project in c++ for getting JobSettings of a job in a queue from .shd file.Can anyone please suggest me which API is used for reading .shd file?
If you're talking about the shadow file from the Windows spooler, take a look at this site and code accordingly - http://www.undocprint.org/formats/winspool/shd
Please note that this format is undocumented and so could change ever so often.
I'm trying to read an INI file and write another INI file with the sections order changed.
Does Windows API have tools for this kind of INI file processing? Are there open-source solutions that are preferred? Or should I try to attempt to parse it manually?
Windows has its own INI functions for C. But since you mentioned C++ try Feather INI. Program Options is another from Boost.
As noted in the comment, you can use winapi functions to do this. GetPrivateProfileSectionNames returns the names of the sections in the .ini file. Which you can then iterate and call GetPrivateProfileSection() to get the content of each section.
Apparently this supposed to be possible. For example opening and operating on a file with NOTEPAD, or HxD. But aren't they all text files...how would one specify which text editor to open the file and operate on the file with using the WINDOWS API. It is certainly not in "CreateFile".
Hopefully I'm understanding your question... The easiest way to do this is to launch the desired editor and pass the filename as an argument, rather than "invoking" the file (which will launch the default program associated with the file type).
For example, notepad.exe mytextfile.txt or gvim.exe mytextfile.txt.
If the editor is not on your %PATH%, you'll need to use a full path file name.
What are you trying to do, exactly? You could:
Maintain a list of editors that you expect to be installed and have entries for in the system's PATH (bad idea)
Have an editor/editors that you want to use, query the Windows registry to find the installation path of the editors (using RegGetValue), and launch the editor with CreateProcess) (a little better idea)
Query the registry to get the default editor for a given file type and then launch that editor using CreateProcess. (best idea)
But it all depends on what your goal is really.
Edit based on requirements
So, just so we're on the same page, from C++, you want to:
Take a command line parameter to your C++ application (filename)
Open that file in an arbitrary editor
Detect when the user has made changes to that file
Operate on the file contents
Is that correct?
If so, you could:
Use Boost libs to compute a CRC for the current data in the file
Launch an editor using one of the methods I initially described
Stick in a tight loop and sleep so you don't chew up resources while the initially computed CRC matches one calculated every iteration of the loop
Of course, there are all kinds of issues that you'd have to deal with (that's just a super simple way of describing the algorithm I might use), such as:
What happens if the user doesn't change the file?
What happens if the file isn't found?
I'm sure that there are a number of different methods of doing this, but this is the easiest method that I can think of at the moment (while still being able to be fairly certain of the changes).
Disclaimer: I haven't implemented something like this, so I might be completely off base ;)
Are you looking for the ShellExecute() or ShellExecuteEx() APIs on Windows? They'll launch whatever program is registered for a file (generally based on the filename extention).