Add event to button in datagridview

See more:

C#

C#4.0

Hello,

I've c# app, and I'm using datagridview with button ,but the event that I put didn't work which is when you press the button something happens?

I used the code from
http://csharp.net-informations.com/datagridview/csharp-datagridview-button.htm[^]

private void ShowProduct_Load(object sender, EventArgs e)
        {
            con.ConnectionString = connection.x;
            try
            {
                con.Open();
                cmd = new SqlCommand("select product_id,product_name,Product_description,product_unitprice,product_sellingprice,product_quantity,total,vendor from product", con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataTable dt = new DataTable();
                da.Fill(dt);
                dataGridView1.DataSource = dt;
                dataGridView1.ReadOnly = true;
                DataGridViewButtonColumn btn = new DataGridViewButtonColumn();
                dataGridView1.Columns.Add(btn);
                btn.HeaderText = "Click Data";
                btn.Text = "Click Here";
                btn.Name = "btn";
                btn.UseColumnTextForButtonValue = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                if (cmd != null)
                {
                    cmd.Dispose();
                    cmd = null;
                }
                con.Close();
            }
        }
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == 8)
            {
                MessageBox.Show((e.RowIndex + 1) + "  Row  " + (e.ColumnIndex + 1) + "  Column button clicked ");
            }
        }