As @Phate01 noticed the numOfBytes is correct only for input length which is a power of 8. What is the best way to convert a variable length hex string e.g. Conclusions from title-drafting and question-content assistance experiments How to convert a char[] of ascii text to a uint8_t[] of bytes, Convert a char array to hex binary format C++, How to convert hex string to char array of hex in C/C++. My bechamel takes over an hour to thicken, what am I doing wrong. Remember that two ascii characters make up one byte, so for every pair of characters, I have to convert the first character to byte, then shift it up by 4 bits, then or it with the next character to get one byte. What is the smallest audience for a communication that has been deemed capable of defamation? hi, thanks for replying. OEM codepages are only used for console I/O. Can somebody be charged for having another person physically assault someone for them? Why do capacitors have less energy density than batteries? 5 solutions Top Rated Most Recent Solution 2 My C++ foo is old and long unused, but this might work: C++ BYTE* buffer; CString sStr ( ( char *)buffer); // or for unicode: CString str ( ( const wchar_t *)buffer); You could have easily found this with google. Can a creature that "loses indestructible until end of turn" gain indestructible later that turn? Let me share my real world experience: I created WinForms application customizing git scripts for teachers. Converting string to byte array in C# - Stack Overflow US Treasuries, explanation of numbers listed in IBKR. How do you convert a byte array to a hexadecimal string in C? The following example alternately attempts to interpret an array of strings as the representation of binary, octal, decimal, and hexadecimal values. Bytes are unsigned. As a result, it is possible to write code in which a signed byte value that is out of the range of the Byte data type is converted to a Byte value without the method throwing an exception. If a crystal has alternating layers of different atoms, will it display different properties depending on which layer is exposed? The following example converts an array of unsigned long integers to Byte values. How do I figure out what size drill bit I need to hang some ceiling hooks? The double-precision floating-point number to convert. You can assign your std::string to char array by doing: If you want to copy the str without the 0 at the end, use strncpy instead: Seems me that winapi is waiting a null terminated c-string. - Stack Overflow How to correctly convert a Hex String to Byte Array in C? This answers it the best in a clean concise way. What is the best way to convert a variable length hex string e.g. Which denominations dislike pictures of people? Why is a dedicated compresser more efficient than using bleed air to pressurize the cabin? like this: string myString = "a test string"; byte [] myByteArray = new byte [myString.Length]; int i = 0; foreach (char c in InStr.ToCharArray()) { myByteArray [i] = (byte)c; i++;} Then some kind soul (thanks Michael) mentioned the Encoding class <slaps forehead>. Two short routines to parse a byte or a word, using strchr(). Can you see the difference in basic approach? Term meaning multiple different layers across many eras? You said "variable length." Converting String to Byte Array and vice versa, How to convert the string with Byte to byte array in c#. So for fun, I was curious if I could do this kind of conversion at compile-time. Using the ToByte(String) method is equivalent to passing value to the Byte.Parse(String) method. Thank you sir! Also note that while leading and trailing spaces parse successfully, formatting symbols, such as currency symbols, group separators, or decimal separators, do not. Is it better to use swiss pass or rent a car? Is saying "dot com" a valid clue for Codenames? (Default unicode will not work since it is 2 bytes). E.g. What's the translation of a "soundalike" in French? The format parameter can be either a standard or a custom numeric format string. I would use a standard function like sscanf to read the string into an unsigned integer, and then you already have the bytes you need in memory. Not the answer you're looking for? Or is there something I'm not seeing? Who counts as pupils or as a student in Germany? It should achieve higher performance than having to do printf on all the characters. So, in my case I had a byte array representing the key and I needed to convert this byte array to char array of hexadecimal values in order to print it out in one line. You don't need it. May you please show how to get it without the null terminator of the string. If it solved your problem don't forget to mark the answer as accepted please. Is there a word for when someone stops being talented? As a minor observation, do note that char2input can be made slightly more efficient, especially if used heavily. Was the release of "Barbie" intentionally coordinated to be on the same day as "Oppenheimer"? I'd argue that the LINQ is more understandable. Conclusions from title-drafting and question-content assistance experiments How to save string contains of 1 and 0 to bin file? Starting with C++11, we can use std::byte to represent the actual byte data. Just how variable do you mean? It takes a c-string array, converts pairs of characters into a single byte and expands those bytes into a uniform initialization list used to initialize the T type provided as a template parameter. I don't understand why you opted for an answer that give you null terminator. I was pulling my hair for a week to figure out to explicitly set UTF-8 for process script and convert the output from CP1250 to UTF-8 in the main thread. The class stores the string representation of a byte value along with a sign field, so that it is able to represent both signed and unsigned byte values. how to convert a set of hex strings to byte array. How to correctly convert a Hex String to Byte Array in C? Calling this method always throws InvalidCastException. Encoding.Unicode is popular for string representation in memory, because it uses fixed 2 bytes per char, so one can jump to n-th character in constant time at cost of more memory usage: it is UTF-16LE. But up vote for your time! You could use MemoryMarshal API to perform very fast and efficient conversion. Why does ksh93 not support %T format specifier of its built-in printf in AIX? Find centralized, trusted content and collaborate around the technologies you use most. When you try to convert a String object to Byte Array, you still have a character set and encoding and it depends on the encoding of your string whether its is in ASCII or UTF8. Following is the solution I wrote up for performance reasons: This is a modified function from a similar question, modified as per the suggestion of https://stackoverflow.com/a/18267932/700597. I wanted a way of initializing an array from a string literal, and this is almost exactly what I need. Then we can loop digit by digit, combining each pair using bin shift << and bin or, and So you can use System.Text.Encoding.Unicode.GetBytes () to retrieve the set of bytes that Microsoft.Net would using to represent the characters. What are some compounds that do fluorescence but not phosphorescence, phosphorescence but not fluorescence, and do both? But I fear that the result doesn't meet expectations when with odd number of hex digits. User2019981500 posted Tim Huffam. As far as I know, there's no standard function to do so, but it's simple to achieve in the following manner: As Al pointed out, in case of an odd number of hex digits in the string, you have to make sure you prefix it with a starting 0. 1. How would I go about doing that in my case? Converts the value of the specified Unicode character to the equivalent 8-bit unsigned integer. How can the language or tooling notify the user of infinite loops? May I reveal my identity as an author during peer review? By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. c++. All I can see is that there are a number items attached to Properties as a string. EDIT: here's another way to split the string into 8-character chunks, perhaps a bit simpler : If you know that the length of the string is a multiple of 8, you can make it even simpler : Actually the answer by @Maciej is not correct. And what do you mean by "try this"? I'd rename that method to include the fact that it's using ASCII encoding. We have no idea what you're doing. Its relatively easy to convert a string to an char array or a byte array but not a STRING byte array. How to automatically change the name of a file on a daily basis. 3. 1 convert a string to a byte array in C# using the Encoding class. Thank you @Quest! I'm not sure if that's what you were asking me though. String will implicitly be cast to ReadOnlySpan, as MemoryMarshal.Cast accepts either Span or ReadOnlySpan as an input parameter. If your input is longer than number-of-bits-in-the-longest-integer-type/4 then you'll need one of the more flexible methods suggested by other answers. When filling the width with 0 for hex, remember to reset it to space before printing decimal. Is there a word in English to describe instances where a melody is sung by multiple singers/voices? @makulik I did try using streams and std::hex but couldn't get anything to work. Load a string - get bytes. Find centralized, trusted content and collaborate around the technologies you use most. :). value does not consist of an optional sign followed by a sequence of digits (0 through 9). Term meaning multiple different layers across many eras? How can kaiju exist in nature and not significantly alter civilization? Who counts as pupils or as a student in Germany? An object that implements the IConvertible interface, or null. I don't like the idea of calling sscanf() or strtol() since it feels like overkill. How to convert a String to byte Array in c# - Net-Informations.Com How? provider enables the user to specify culture-specific conversion information about the contents of value. To learn more, see our tips on writing great answers. Why don't comment instead of posting a new answer that just add precision to another answer ? How to avoid conflict of interest when dating another employee in a matrix management company? @alexvii That is not an answer to this question. I used it to encode a GUID as a byte array. Ah thanks Quest, but I need to set it to BYTE[] as I use it in multiple places. To ensure that encoded bytes are decoded properly, you should use a Unicode encoding, such as UTF8Encoding or UnicodeEncoding. This means that the method is suitable for returning the numeric codes of characters in the ASCII character range or in the Unicode C0 Controls and Basic Latin, and C1 Controls and Latin-1 Supplement ranges, from U+0000 to U+00FF.