Hi Satya,
The values that you are concatenating into the value field is Text80 i.e.e 80 Characters. So at the time of display in the value help you concatenate the values and then display it to the user, but at the time of saving you can use the key field to convert the value back to the one which can be used in the database.
If required let me know if can create a sample code and provide you the same.
Many thanks in advance.
Best Regards,
Samantak.