transferring data from one column to other column in a datagrid

[srivalli]

in my form i have one data grid

i have many banks in my table.
say for a particular bank,
i want to retrieve the details in a datagrid

say if i select a bank (ex A) then i want to display that bank details in a datagrid.
my second query is

when i get a details in a datagrid ,i want to transfer the data from one column to other column.

let me a bit clear

for filling a datagrid
i use the following code

da.fill(ds,"a")
datagrid1.datasource=ds.tables("a")

but for filling data in datagrid for a particular bank
how to
assume that i am displaying number of banks in dropdownlist.

after getting details in a datagrid,
and when i click the button ,i want to transfer the "issued" column data to the "discharged" column and i want to show that transfer in a datagrid.

any suggestions
pls
thanku