How to bind data from database without page load event?

<pre> protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            { 
              
                
            }
           
            }
        
       
    protected void Button1_Click(object sender, EventArgs e)
        {
        
        

                try
                {

                   

                    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();


                }

                catch
                {

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

                }