string str=@" ";
public void grid()
{
OleDbConnection con = new OleDbConnection(str);
con.Open();
OleDbCommand cmd = new OleDbCommand("SELECT * FROM tablename", con);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
con.Close();
}
private void form_Load(object sender, EventArgs e)
{
grid();
}