devexpress controls. How to save selected cells from aspgridview to sql server db?

Question

SQL Server

Hello, I'm switching from regular controls to devexpress.
I used to use a regular grid, now I need aspgridview.
Called the SelectedIndexChanged event and did in it:
GridViewRow row = postavchik_GridView.SelectedRow;
string post_1 = row.Cells[6].Text;
And saved the selected value into a variable. For a long time, save one by one.
It should be so that I selected the necessary lines with checkboxes, and the first cell was taken from them, the id from the database is stored there and saved to another table.
I asked on the technical support page, but they don’t answer me because the license has expired.
I found a similar event in this grid. But I can't figure out the syntax.
I understand that this is how it is done.
These controls work with js. js intercepts the value from the grid, pushes all the values ​​to the sheet. The sheet is transferred to the server and calls the server js in which c #, it takes the first element from the sheet and saves it to the database, then the second and so on.
Am I understanding correctly or not?

Answer 1

www.dotnetawesome.com/2013/09/checkbox-inside-grid... this helped