std::string to QString can't convert properly
-
@Ketan__Patel__0011 said in std::string to QString can't convert properly:
and my actual string data string is :
again: which encoding is this string?
Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
Visit the Qt Academy at https://academy.qt.io/catalog -
@Ketan__Patel__0011 said in std::string to QString can't convert properly:
and my actual string data string is :
again: which encoding is this string?
i generate this string using my encryption algorithm and i am using some high logic for it
Like Multiple Looping Statements And Leader Conditions
-
i generate this string using my encryption algorithm and i am using some high logic for it
Like Multiple Looping Statements And Leader Conditions
@Ketan__Patel__0011 I think maybe your cpp file is not saved in UTF8...
But never mind, since the string is just an output of encryption algorithm...There'll be characters that even UTF8 cannot handle.
You should know that we usually don't save that kind of string (or we should call it raw data) directly, because it is not readable / printable.
We encode the raw data to hex / base64 string, and use that to save / transfer to others.
And when we need the raw data, we decode from that hex / base64 string.
If you don't want to save / transfer / make it readable, just want to get rid of a std::string and use Qt's class to store it, then you should use QByteArray instead of QString.
So there won't be any option about "what codec should be used to convert the string" since it is not a really string! -
i generate this string using my encryption algorithm and i am using some high logic for it
Like Multiple Looping Statements And Leader Conditions
-
@Ketan__Patel__0011
Additional to @Bonnie's latest.i generate this string using my encryption algorithm
So should it not be a byte array/vector rather than a string?
Thanks For Reply
ByteArray Or Vector Is good concept but it's is not good for sensitive data
and even it is not good for any encrypted data or any sensitive data
And Otherthing is am able to write this data in any text file
but when i try to save this string in my MYSQL Database that time it is can't store
with complete and proper data some characters are changesPlease Help me to solve this problem
This problem spoiled my whole day
-
Thanks For Reply
ByteArray Or Vector Is good concept but it's is not good for sensitive data
and even it is not good for any encrypted data or any sensitive data
And Otherthing is am able to write this data in any text file
but when i try to save this string in my MYSQL Database that time it is can't store
with complete and proper data some characters are changesPlease Help me to solve this problem
This problem spoiled my whole day
@Ketan__Patel__0011 said in std::string to QString can't convert properly:
ByteArray Or Vector Is good concept but it's is not good for sensitive data
and even it is not good for any encrypted data or any sensitive dataNo idea what you are talking about here. I never said you should not encrypt. I asked whether the result of the encryption isn't a byte array rather than a string as you say it is. It looks like bytes and not characters to me. But if you say it's text that's up to you.
And Otherthing is am able to write this data in any text file
Regardless of encoding/codec?
but when i try to save this string in my MYSQL Database that time it is can't store
with complete and proper data some characters are changesI wonder if that's because it's bytes and not text?
-
Thanks For Reply
ByteArray Or Vector Is good concept but it's is not good for sensitive data
and even it is not good for any encrypted data or any sensitive data
And Otherthing is am able to write this data in any text file
but when i try to save this string in my MYSQL Database that time it is can't store
with complete and proper data some characters are changesPlease Help me to solve this problem
This problem spoiled my whole day
@Ketan__Patel__0011 I don't think anyone can / want to help you if you don't listen to anyone.
Here I'll tell you what I usually do to store encrypted data to database.
Option 1: I use QByteArray to store the encrypted data, and then save it to database as BLOB.
Option 2: I convert it to hex / base64 string, and then save it to database as string.
That's over. I'll not reply this post anymore. -
@Ketan__Patel__0011 said in std::string to QString can't convert properly:
ByteArray Or Vector Is good concept but it's is not good for sensitive data
and even it is not good for any encrypted data or any sensitive dataNo idea what you are talking about here. I never said you should not encrypt. I asked whether the result of the encryption isn't a byte array rather than a string as you say it is. It looks like bytes and not characters to me. But if you say it's text that's up to you.
And Otherthing is am able to write this data in any text file
Regardless of encoding/codec?
but when i try to save this string in my MYSQL Database that time it is can't store
with complete and proper data some characters are changesI wonder if that's because it's bytes and not text?
my Whole Process
1 -> define a normal string like:
std::string data="Welcome For Process";
2 -> Applying my encryption algorithm on this string
3 -> then store encrypted string into my file
4 -> Now for Backup i am try to save my encrypted string in MYSQL DatabaseBut i can't store my encrypted string properly, some character are changed
otherthing is when open my encrypted string file in notepad
then it show it is ANSI encodingPlease help me to solve this problem
Again My Major problem is
i want to store my encrypted string in MYSQL Database -
my Whole Process
1 -> define a normal string like:
std::string data="Welcome For Process";
2 -> Applying my encryption algorithm on this string
3 -> then store encrypted string into my file
4 -> Now for Backup i am try to save my encrypted string in MYSQL DatabaseBut i can't store my encrypted string properly, some character are changed
otherthing is when open my encrypted string file in notepad
then it show it is ANSI encodingPlease help me to solve this problem
Again My Major problem is
i want to store my encrypted string in MYSQL Database@Ketan__Patel__0011 said in std::string to QString can't convert properly:
2 -> Applying my encryption algorithm on this string
And how does your encryption algorithm work? Is it really producing text characters from text characters, or is it actually manipulating and producing bytes?
otherthis is when open my encrypted string file in notepad
then it show it is ANSI encodingNot sure that tells you anything from Notepad, but I'm not certain.
Please help me to solve this problem
So you keep saying.
i want to store my encrypted string in MYSQL Database
Yes, we understand this.
@Bonnie's two options are indeed the normal way to save any encrypted data to a database.
-
my Whole Process
1 -> define a normal string like:
std::string data="Welcome For Process";
2 -> Applying my encryption algorithm on this string
3 -> then store encrypted string into my file
4 -> Now for Backup i am try to save my encrypted string in MYSQL DatabaseBut i can't store my encrypted string properly, some character are changed
otherthing is when open my encrypted string file in notepad
then it show it is ANSI encodingPlease help me to solve this problem
Again My Major problem is
i want to store my encrypted string in MYSQL Database@Ketan__Patel__0011
Hi
Since its not unicode or UTF8 or real text at all you cannot just store it in the DB as it expects it to be valid text
with valid encoding.So do as @Bonnie says and store them in a blop via QByteArray.
Like this sample storing images.
https://wiki.qt.io/How_to_Store_and_Retrieve_Image_on_SQLiteNote, the type used for creating the table
query.exec( "CREATE TABLE IF NOT EXISTS imgTable ( filename TEXT, imagedata BLOB )" );Then it won't alter your data and it should work.
Your output from the encryption is no longer valid text. Treat it as a binary thing and
use QByteArray in case it might add a zero in there. std::string and QString is not ok for this sort of data
in many cases.
