I actually have a simple solution about my question but I also want to make it a little bir more easier.
I will always have an excel which has 12 sheets then Robot will try to get all rows and columns from this excel with whole values but there is a problem for me.
The problem is that I do not want to have 12 datatables to get whole sheets and their values.
Is not there any solution which is kind of Dictionaries.
For example the name of Excel is WholeSheets and Example Sheets are Sheet1,Sheet2,Sheet3
I want to reach any one of them by this : WholeSheets.Sheet1 or WholeSheets.Sheet2