what do i write into c# to edit the data in an access database

Question

I have an access database that I created using sql in the actual program and have used a 'BIT' to make a record true or false. Now I would like to use the update sql statement to change whether my record is true or false.

For example I have a payments database table and a paid record which is either true or false.

if (HasPaidCBOX.Checked)
{
    Cmd.CommandText = "UPDATE Payments SET Paid = @p WHERE PlayerID ='" + PaymentForm.ID + "'";
    Cmd.Parameters.AddWithValue("@p", xxx);
    Cmd.ExecuteNonQuery();
}

I would like to know what goes in the place marked with three x's.

Also, you should be parameterising _both_ values there, not just xxx. PaymentForm.ID should be parameterised too. — ADyson, Jan 06 '21 at 15:09
@OlivierRogier This question has nothing to do with SQL injection (even though it happens to contain that vulnerability, the OP isn't asking about it). As such, not a duplicate. — Alejandro, Jan 06 '21 at 15:28
@TheMixy [you are right](https://stackoverflow.com/questions/21073357/how-to-insert-bool-into-database) `-1` should work — oleksa, Jan 06 '21 at 15:34
@TheMixy thank you it worked what is the number for false or an unchecked box? — Jack Ferdinand, Jan 06 '21 at 15:38
@OlivierRogier Absolutely, I agree, that link may help with the slighty off-topic injection problem, but not merits a close-vote for that reason. — Alejandro, Jan 06 '21 at 15:39

TheMixy · Accepted Answer · 2021-01-06T19:26:01.257

3

Access uses -1 for TRUE and 0 for FALSE. So use 0 and -1.

Also, as pointet out by @ADyson you should parameterise all values in your SQL statements.

edited Jan 06 '21 at 19:26

answered Jan 06 '21 at 15:47

TheMixy

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what do i write into c# to edit the data in an access database

1 Answers1