following way a DataTable with data can be used to
populate gridview control in asp.net.following codes get files list
from a file path and adds in DataTable then sets that
DataTable as a DataSource of the GridView grdDirList.

make sure you have made the following configuration
to your IIS to run Asp.net applications-

jquery dialog is not only best for showing only content but
also can be used to show form,buttons for postback.......
but for this jquery dialog must be appended to form as -

From many years software makers or developers
facing problems on how to make data to both
outside and inside of the system maintaining
security

GridView is the most common data representation
contol in asp.net.It's needed to show users the
items details when the item is selected.DetailsView
control can be used precisely to show the Gridview items
details.