Refresh datagridview win forms after updating the database from a child form

how to refresh datagridview after making changes on the database from another form, after closing child form i tried to refresh the datagridview with click event but it's not working, do i have to use dataset ? ``` //create an OleDbDataAdapter to execute the query dAdapter = new OleDbDataAdapter(gQuery, connString); //create a command builder cBuilder = new OleDbCommandBuilder(dAdapter); //create a DataTable to hold the query results dTable = new DataTable(); //fill the DataTable dAdapter.Fill(dTable); //BindingSource to sync DataTable and DataGridView bSource = new BindingSource(); //set the BindingSource DataSource bSource.DataSource = dTable; //set the DataGridView DataSource dataGridView1.DataSource = bSource; private void button_Refresh_Click(object sender, EventArgs e) { dataGridView1.DataSource = bSource; dataGridView1.Refresh(); } ``` Help me, please thanks in advance