why doesn't datagridview refresh?

Question

here is what happens after i press a button:

    dataGridView1.DataSource = ConnectandReadList(some_query);
    dataGridView1.Refresh();

pl

Answer 1

A DataGridView sets up bindings the first time you assign the DataSource. The problem is that subsequent DataSource assignments, if the assignments have a different structure from the initial assignment, will fail because the bindings are now "off"

You need to reset the DataGridView thusly so that the data is bound a new. (The link is for VB but you just need to know the methods to call. Even copy/paste would be overkill.)