Create datatable and go back

Dear all,

I have one question.

If there are two web form, one with 2 textbox and 1 datagrid and two button
(named details and save) and the second with 5 textboxs and one save button.

Firstly, it enter info in the first web form into 2 textbox and then click
add details button which will go to the second form. Then enter info into 5
textboxs and click save button.
At this time, it will go back to the first form and then show the previous
second form info in the datagrid.

when click the save button in the first form, it will insert records into
the tables from the first form info, including 2 text boxs and datagrid
infos.

I have one ideas in saving the second form info in the session datatable.
What the code should be of creating datatable and columns and assigning?
Moreover, How about go back to the first form and show the previous entered
form one data. What the code should be?

Appreciate for your help!!

Thanks,

Raymond