B4R Question string to hex

[Mostez]

Hello,
I receive a string '0005638777' representing card number and store it to buffer array(AsyncStreams), I want to convert it to hex string to shorten length (56 0A 79) then use it to create card data i.e. 560A79.DAT any ideas?

Thanks

 

[Erel]

You can use ByteConverter.HexToBytes to convert the hex string to an array of bytes.

 

[Mostez]

I want to convert it to hex string to shorten length

I want to convert decimal string (0005638777) to hex string (00560A79)

Thanks

 

[Erel]

What are you communicating with? Why are you sending decimal numbers as strings?

If the decimal number fits a ULong then you can use RandomAccessFile to convert it to bytes and ByteConvert to convert the bytes to a hex string. I think that you will save a few characters but it will require more memory.

 

[Mostez]

I communicate with PC, it sends decimal number string represents personal card number,user name and some other parameters, I want to save this data in file represents card number i.e. 001A1BEC.DAT, after that, user data on that file will be verified against RFID module reading which sends card number in hex.
I will try your method, otherwise i have to change data from PC to hex also.
I used hex to save file name because 8 hex digits can fit up to 9 digits of card number 999-999-999 while using decimal will fit only 8 digits, I'm tied to 8.3 filing system format.

Thanks so much Erel