Need help in updating value in database

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Hi all

below is my code of fetching data from database

C#

npgcommand = new NpgsqlCommand("Select * from tbl_trans where accnumber= (select account_number from tbl_acccountdetails where holder_name='" + label3.Text + "') and printed=1", npgconn);
                npgDA = new NpgsqlDataAdapter(npgcommand);

                npgDA.Fill(dt);

now after this i am printing this values.

now after this i want to update printed=0 in database.means what ever rows are coming in dt
i want to update only those values.

Please tell me how to do this.

Posted 2-Apr-14 20:07pm

Snehasish_Nandy

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ravikhoda · Answer 1 · 2014-04-02T21:00:00

Solution 1

u can use query like below and execute it.

SQL

update  tbl_trans  set printed=0 where holder_name='" + label3.Text + "' and printed=1;

call this query after your datatable is filled.

hope this helps.

Posted 2-Apr-14 21:00pm

ravikhoda