How to bind grid view only button clicked

<pre>        protected void Page_Load(object sender, EventArgs e)
        {
          
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {

                SqlConnection con = new SqlConnection(@"user id=sa;password=ssa;database=Mohan;data source=PCTH101\PCTH101");

                con.Open();

                SqlCommand cmd = new SqlCommand("select * from bind", con);

                cmd.CommandType = CommandType.Text;

                SqlDataAdapter da = new SqlDataAdapter(cmd);

                DataSet ds = new DataSet();

                da.Fill(ds, "bind");

                GridView1.DataSource = ds.Tables["bind"]; ;

                GridView1.DataBind();
                this.GridView1.Visible = true;

            }

            catch
            {

                Response.Write("<script>alert('No record Found')</script>");

            }
        }
    }