How to Refresh a dataGridView in C#

I have a  datagridview in windows form. I have added a timer as well. So in the timer_tick method, I had called a method to retrieve data to the gridview from my Access databse. But now I want to refresh the datagrid view as soon as it updates the table. I have added following code, but it doesn't work. What am I doing wrong?

 

protected void FillDataGridView() { // create an open the connection     
 OleDbConnection conn = new OleDbConnection(conString);
 OleDbCommand command = new OleDbCommand();       
  command = conn.CreateCommand(); 
// create the DataSet DataSet ds = new DataSet(); 
// run the query         command.CommandText = "SELECT * FROM TexasClub"; 
OleDbDataAdapter adapter = new OleDbDataAdapter();
 adapter = new OleDbDataAdapter(command);       
  adapter.Fill(ds); } private void timer1_Tick(object sender, EventArgs e)
 {
 //Call the FillGridview method FillDataGridView();
 }